/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-820ea7a [2022-02-18 17:25:56,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-18 17:25:56,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-18 17:25:56,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-18 17:25:56,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-18 17:25:56,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-18 17:25:56,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-18 17:25:56,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-18 17:25:56,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-18 17:25:56,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-18 17:25:56,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-18 17:25:56,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-18 17:25:56,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-18 17:25:56,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-18 17:25:56,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-18 17:25:56,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-18 17:25:56,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-18 17:25:56,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-18 17:25:56,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-18 17:25:56,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-18 17:25:56,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-18 17:25:56,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-18 17:25:56,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-18 17:25:56,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-18 17:25:56,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-18 17:25:56,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-18 17:25:56,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-18 17:25:56,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-18 17:25:56,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-18 17:25:56,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-18 17:25:56,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-18 17:25:56,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-18 17:25:56,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-18 17:25:56,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-18 17:25:56,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-18 17:25:56,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-18 17:25:56,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-18 17:25:56,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-18 17:25:56,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-18 17:25:56,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-18 17:25:56,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-18 17:25:56,736 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-02-18 17:25:56,749 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-18 17:25:56,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-18 17:25:56,749 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-18 17:25:56,749 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-18 17:25:56,750 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-18 17:25:56,750 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-18 17:25:56,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-18 17:25:56,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-18 17:25:56,750 INFO L138 SettingsManager]: * Use SBE=true [2022-02-18 17:25:56,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-18 17:25:56,750 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-18 17:25:56,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-18 17:25:56,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-18 17:25:56,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-18 17:25:56,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-18 17:25:56,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-18 17:25:56,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-18 17:25:56,751 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-18 17:25:56,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-18 17:25:56,751 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-18 17:25:56,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-18 17:25:56,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-18 17:25:56,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-18 17:25:56,751 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-18 17:25:56,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-18 17:25:56,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-18 17:25:56,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-18 17:25:56,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-18 17:25:56,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-18 17:25:56,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-18 17:25:56,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-18 17:25:56,752 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-18 17:25:56,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-18 17:25:56,752 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-18 17:25:56,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-18 17:25:56,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-18 17:25:56,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-18 17:25:56,919 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-18 17:25:56,920 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-18 17:25:56,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl [2022-02-18 17:25:56,921 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl' [2022-02-18 17:25:56,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-18 17:25:56,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-18 17:25:56,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-18 17:25:56,949 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-18 17:25:56,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-18 17:25:56,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:25:56" (1/1) ... [2022-02-18 17:25:56,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:25:56" (1/1) ... [2022-02-18 17:25:56,968 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-18 17:25:56,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-18 17:25:56,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-18 17:25:56,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-18 17:25:56,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-18 17:25:56,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:25:56" (1/1) ... [2022-02-18 17:25:56,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:25:56" (1/1) ... [2022-02-18 17:25:56,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:25:56" (1/1) ... [2022-02-18 17:25:56,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:25:56" (1/1) ... [2022-02-18 17:25:56,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:25:56" (1/1) ... [2022-02-18 17:25:56,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:25:56" (1/1) ... [2022-02-18 17:25:56,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:25:56" (1/1) ... [2022-02-18 17:25:56,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-18 17:25:56,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-18 17:25:56,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-18 17:25:56,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-18 17:25:56,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:25:56" (1/1) ... [2022-02-18 17:25:56,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-18 17:25:56,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:25:57,010 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-18 17:25:57,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-18 17:25:57,040 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-18 17:25:57,040 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-18 17:25:57,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-18 17:25:57,040 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-18 17:25:57,041 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-18 17:25:57,041 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-18 17:25:57,041 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-18 17:25:57,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-18 17:25:57,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-18 17:25:57,042 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-18 17:25:57,083 INFO L234 CfgBuilder]: Building ICFG [2022-02-18 17:25:57,087 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-18 17:25:57,146 INFO L275 CfgBuilder]: Performing block encoding [2022-02-18 17:25:57,155 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-18 17:25:57,156 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-18 17:25:57,157 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:25:57 BoogieIcfgContainer [2022-02-18 17:25:57,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-18 17:25:57,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-18 17:25:57,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-18 17:25:57,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-18 17:25:57,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:25:56" (1/2) ... [2022-02-18 17:25:57,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c51a063 and model type nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:25:57, skipping insertion in model container [2022-02-18 17:25:57,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:25:57" (2/2) ... [2022-02-18 17:25:57,162 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.bpl [2022-02-18 17:25:57,165 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-18 17:25:57,165 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-18 17:25:57,165 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-18 17:25:57,165 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-18 17:25:57,185 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-18 17:25:57,217 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-18 17:25:57,221 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-02-18 17:25:57,221 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-18 17:25:57,243 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2022-02-18 17:25:57,276 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:25:57,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:25:57,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-18 17:25:57,284 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:25:57,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:25:57,285 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:25:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:25:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash -618238623, now seen corresponding path program 1 times [2022-02-18 17:25:57,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:25:57,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173370232] [2022-02-18 17:25:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:25:57,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:25:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:25:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:25:57,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:25:57,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173370232] [2022-02-18 17:25:57,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173370232] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 17:25:57,408 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 17:25:57,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 17:25:57,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061890065] [2022-02-18 17:25:57,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 17:25:57,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 17:25:57,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:25:57,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 17:25:57,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 17:25:57,443 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:25:57,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:25:57,485 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2022-02-18 17:25:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 17:25:57,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-18 17:25:57,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:25:57,501 INFO L225 Difference]: With dead ends: 43 [2022-02-18 17:25:57,501 INFO L226 Difference]: Without dead ends: 43 [2022-02-18 17:25:57,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 17:25:57,506 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 17:25:57,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 17:25:57,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-18 17:25:57,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-02-18 17:25:57,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:25:57,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2022-02-18 17:25:57,539 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2022-02-18 17:25:57,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:25:57,540 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2022-02-18 17:25:57,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:25:57,540 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2022-02-18 17:25:57,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-18 17:25:57,540 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:25:57,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:25:57,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-18 17:25:57,541 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:25:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:25:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1950061855, now seen corresponding path program 1 times [2022-02-18 17:25:57,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:25:57,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11392590] [2022-02-18 17:25:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:25:57,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:25:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:25:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 17:25:57,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:25:57,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11392590] [2022-02-18 17:25:57,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11392590] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 17:25:57,640 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 17:25:57,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 17:25:57,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576306961] [2022-02-18 17:25:57,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 17:25:57,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 17:25:57,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:25:57,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 17:25:57,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-18 17:25:57,642 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:25:57,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:25:57,688 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2022-02-18 17:25:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 17:25:57,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-18 17:25:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:25:57,691 INFO L225 Difference]: With dead ends: 50 [2022-02-18 17:25:57,691 INFO L226 Difference]: Without dead ends: 50 [2022-02-18 17:25:57,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-18 17:25:57,692 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 17:25:57,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 27 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 17:25:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-18 17:25:57,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-02-18 17:25:57,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 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) [2022-02-18 17:25:57,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2022-02-18 17:25:57,705 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2022-02-18 17:25:57,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:25:57,706 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2022-02-18 17:25:57,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:25:57,706 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2022-02-18 17:25:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-18 17:25:57,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:25:57,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:25:57,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-18 17:25:57,707 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:25:57,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:25:57,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1007893021, now seen corresponding path program 1 times [2022-02-18 17:25:57,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:25:57,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272670949] [2022-02-18 17:25:57,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:25:57,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:25:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:25:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:25:57,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:25:57,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272670949] [2022-02-18 17:25:57,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272670949] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:25:57,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711455835] [2022-02-18 17:25:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:25:57,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:25:57,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:25:57,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:25:57,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-18 17:25:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:25:57,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-18 17:25:57,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:25:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:25:58,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:25:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:25:58,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711455835] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:25:58,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:25:58,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-18 17:25:58,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240413827] [2022-02-18 17:25:58,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:25:58,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-18 17:25:58,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:25:58,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-18 17:25:58,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-02-18 17:25:58,452 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:25:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:25:58,594 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2022-02-18 17:25:58,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-18 17:25:58,595 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-18 17:25:58,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:25:58,599 INFO L225 Difference]: With dead ends: 144 [2022-02-18 17:25:58,599 INFO L226 Difference]: Without dead ends: 113 [2022-02-18 17:25:58,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-02-18 17:25:58,602 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:25:58,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 113 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 17:25:58,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-02-18 17:25:58,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 55. [2022-02-18 17:25:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:25:58,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2022-02-18 17:25:58,615 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2022-02-18 17:25:58,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:25:58,615 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2022-02-18 17:25:58,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:25:58,616 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2022-02-18 17:25:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-18 17:25:58,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:25:58,616 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:25:58,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-18 17:25:58,823 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 [2022-02-18 17:25:58,824 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:25:58,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:25:58,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1821743003, now seen corresponding path program 2 times [2022-02-18 17:25:58,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:25:58,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120832585] [2022-02-18 17:25:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:25:58,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:25:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:25:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:25:58,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:25:58,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120832585] [2022-02-18 17:25:58,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120832585] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:25:58,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255049689] [2022-02-18 17:25:58,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:25:58,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:25:58,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:25:58,916 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:25:58,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-18 17:25:58,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:25:58,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:25:58,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 17:25:58,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:25:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:25:59,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:25:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:25:59,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255049689] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:25:59,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:25:59,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-02-18 17:25:59,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653016094] [2022-02-18 17:25:59,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:25:59,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-18 17:25:59,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:25:59,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-18 17:25:59,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-18 17:25:59,156 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:25:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:25:59,470 INFO L93 Difference]: Finished difference Result 177 states and 328 transitions. [2022-02-18 17:25:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-18 17:25:59,471 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-18 17:25:59,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:25:59,471 INFO L225 Difference]: With dead ends: 177 [2022-02-18 17:25:59,472 INFO L226 Difference]: Without dead ends: 177 [2022-02-18 17:25:59,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-02-18 17:25:59,473 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 175 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:25:59,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 81 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 17:25:59,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-18 17:25:59,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 75. [2022-02-18 17:25:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:25:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2022-02-18 17:25:59,478 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 21 [2022-02-18 17:25:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:25:59,478 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2022-02-18 17:25:59,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:25:59,479 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2022-02-18 17:25:59,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-18 17:25:59,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:25:59,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:25:59,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-18 17:25:59,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-18 17:25:59,695 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:25:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:25:59,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2071555341, now seen corresponding path program 3 times [2022-02-18 17:25:59,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:25:59,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007466359] [2022-02-18 17:25:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:25:59,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:25:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:25:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:25:59,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:25:59,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007466359] [2022-02-18 17:25:59,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007466359] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:25:59,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123697309] [2022-02-18 17:25:59,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:25:59,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:25:59,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:25:59,751 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:25:59,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-18 17:25:59,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-18 17:25:59,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:25:59,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 17:25:59,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:25:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:25:59,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:25:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:25:59,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123697309] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:25:59,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:25:59,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-02-18 17:25:59,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416656908] [2022-02-18 17:25:59,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:25:59,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-18 17:25:59,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:25:59,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-18 17:25:59,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-02-18 17:25:59,976 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:00,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:26:00,223 INFO L93 Difference]: Finished difference Result 141 states and 267 transitions. [2022-02-18 17:26:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-18 17:26:00,223 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21 [2022-02-18 17:26:00,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:26:00,224 INFO L225 Difference]: With dead ends: 141 [2022-02-18 17:26:00,224 INFO L226 Difference]: Without dead ends: 139 [2022-02-18 17:26:00,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-02-18 17:26:00,225 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 132 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:26:00,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 40 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 17:26:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-18 17:26:00,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2022-02-18 17:26:00,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2022-02-18 17:26:00,229 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 21 [2022-02-18 17:26:00,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:26:00,229 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2022-02-18 17:26:00,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:00,229 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2022-02-18 17:26:00,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-18 17:26:00,230 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:26:00,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:26:00,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-18 17:26:00,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:00,450 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:26:00,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:26:00,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1720260825, now seen corresponding path program 4 times [2022-02-18 17:26:00,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:26:00,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930053145] [2022-02-18 17:26:00,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:26:00,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:26:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:26:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:00,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:26:00,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930053145] [2022-02-18 17:26:00,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930053145] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:26:00,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765122674] [2022-02-18 17:26:00,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:26:00,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:00,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:26:00,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:26:00,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-18 17:26:00,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:26:00,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:26:00,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-18 17:26:00,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:26:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:01,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:26:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:01,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765122674] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:26:01,399 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:26:01,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-02-18 17:26:01,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732099005] [2022-02-18 17:26:01,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:26:01,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 17:26:01,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:26:01,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 17:26:01,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-02-18 17:26:01,401 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:02,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:26:02,208 INFO L93 Difference]: Finished difference Result 375 states and 737 transitions. [2022-02-18 17:26:02,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-18 17:26:02,209 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-18 17:26:02,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:26:02,210 INFO L225 Difference]: With dead ends: 375 [2022-02-18 17:26:02,210 INFO L226 Difference]: Without dead ends: 361 [2022-02-18 17:26:02,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=570, Invalid=1592, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 17:26:02,211 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 231 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 17:26:02,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 230 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 501 Invalid, 0 Unknown, 277 Unchecked, 0.3s Time] [2022-02-18 17:26:02,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-02-18 17:26:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 164. [2022-02-18 17:26:02,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.184049079754601) internal successors, (356), 163 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 356 transitions. [2022-02-18 17:26:02,220 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 356 transitions. Word has length 23 [2022-02-18 17:26:02,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:26:02,220 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 356 transitions. [2022-02-18 17:26:02,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:02,220 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 356 transitions. [2022-02-18 17:26:02,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-18 17:26:02,221 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:26:02,221 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:26:02,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-18 17:26:02,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:02,439 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:26:02,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:26:02,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1505995819, now seen corresponding path program 5 times [2022-02-18 17:26:02,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:26:02,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371239729] [2022-02-18 17:26:02,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:26:02,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:26:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:26:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:02,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:26:02,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371239729] [2022-02-18 17:26:02,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371239729] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:26:02,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257636723] [2022-02-18 17:26:02,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:26:02,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:02,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:26:02,609 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:26:02,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-18 17:26:02,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 17:26:02,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:26:02,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-18 17:26:02,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:26:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:03,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:26:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:03,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257636723] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:26:03,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:26:03,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-02-18 17:26:03,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417855681] [2022-02-18 17:26:03,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:26:03,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 17:26:03,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:26:03,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 17:26:03,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-02-18 17:26:03,590 INFO L87 Difference]: Start difference. First operand 164 states and 356 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:05,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:26:05,356 INFO L93 Difference]: Finished difference Result 646 states and 1281 transitions. [2022-02-18 17:26:05,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-18 17:26:05,356 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-18 17:26:05,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:26:05,359 INFO L225 Difference]: With dead ends: 646 [2022-02-18 17:26:05,359 INFO L226 Difference]: Without dead ends: 591 [2022-02-18 17:26:05,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1042, Invalid=4070, Unknown=0, NotChecked=0, Total=5112 [2022-02-18 17:26:05,360 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 396 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 17:26:05,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 236 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 718 Invalid, 0 Unknown, 222 Unchecked, 0.4s Time] [2022-02-18 17:26:05,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-02-18 17:26:05,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 206. [2022-02-18 17:26:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.229268292682927) internal successors, (457), 205 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 457 transitions. [2022-02-18 17:26:05,371 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 457 transitions. Word has length 23 [2022-02-18 17:26:05,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:26:05,371 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 457 transitions. [2022-02-18 17:26:05,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 457 transitions. [2022-02-18 17:26:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-18 17:26:05,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:26:05,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:26:05,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-18 17:26:05,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:05,587 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:26:05,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:26:05,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1378998987, now seen corresponding path program 6 times [2022-02-18 17:26:05,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:26:05,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982877623] [2022-02-18 17:26:05,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:26:05,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:26:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:26:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:05,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:26:05,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982877623] [2022-02-18 17:26:05,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982877623] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:26:05,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572959951] [2022-02-18 17:26:05,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:26:05,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:05,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:26:05,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:26:05,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-18 17:26:05,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-18 17:26:05,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:26:05,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-18 17:26:05,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:26:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:06,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:26:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:06,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572959951] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:26:06,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:26:06,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-02-18 17:26:06,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455811192] [2022-02-18 17:26:06,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:26:06,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 17:26:06,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:26:06,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 17:26:06,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2022-02-18 17:26:06,817 INFO L87 Difference]: Start difference. First operand 206 states and 457 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:09,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:26:09,720 INFO L93 Difference]: Finished difference Result 782 states and 1564 transitions. [2022-02-18 17:26:09,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-18 17:26:09,721 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-18 17:26:09,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:26:09,723 INFO L225 Difference]: With dead ends: 782 [2022-02-18 17:26:09,723 INFO L226 Difference]: Without dead ends: 715 [2022-02-18 17:26:09,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1765, Invalid=6607, Unknown=0, NotChecked=0, Total=8372 [2022-02-18 17:26:09,725 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 497 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 17:26:09,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 225 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 771 Invalid, 0 Unknown, 198 Unchecked, 0.4s Time] [2022-02-18 17:26:09,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-02-18 17:26:09,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 213. [2022-02-18 17:26:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2216981132075473) internal successors, (471), 212 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:09,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 471 transitions. [2022-02-18 17:26:09,733 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 471 transitions. Word has length 23 [2022-02-18 17:26:09,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:26:09,733 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 471 transitions. [2022-02-18 17:26:09,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:09,734 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 471 transitions. [2022-02-18 17:26:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-18 17:26:09,735 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:26:09,735 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:26:09,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-18 17:26:09,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:09,951 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:26:09,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:26:09,952 INFO L85 PathProgramCache]: Analyzing trace with hash 7492009, now seen corresponding path program 7 times [2022-02-18 17:26:09,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:26:09,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185275663] [2022-02-18 17:26:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:26:09,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:26:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:26:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:10,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:26:10,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185275663] [2022-02-18 17:26:10,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185275663] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:26:10,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120117998] [2022-02-18 17:26:10,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:26:10,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:10,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:26:10,035 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:26:10,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-18 17:26:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:26:10,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-18 17:26:10,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:26:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:10,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:26:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:10,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120117998] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:26:10,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:26:10,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-02-18 17:26:10,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112268394] [2022-02-18 17:26:10,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:26:10,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 17:26:10,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:26:10,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 17:26:10,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-02-18 17:26:10,469 INFO L87 Difference]: Start difference. First operand 213 states and 471 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:11,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:26:11,465 INFO L93 Difference]: Finished difference Result 713 states and 1422 transitions. [2022-02-18 17:26:11,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-18 17:26:11,465 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-18 17:26:11,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:26:11,469 INFO L225 Difference]: With dead ends: 713 [2022-02-18 17:26:11,469 INFO L226 Difference]: Without dead ends: 686 [2022-02-18 17:26:11,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=979, Invalid=2561, Unknown=0, NotChecked=0, Total=3540 [2022-02-18 17:26:11,471 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 431 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 17:26:11,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 142 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-18 17:26:11,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-02-18 17:26:11,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 301. [2022-02-18 17:26:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.3066666666666666) internal successors, (692), 300 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 692 transitions. [2022-02-18 17:26:11,483 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 692 transitions. Word has length 23 [2022-02-18 17:26:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:26:11,483 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 692 transitions. [2022-02-18 17:26:11,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 692 transitions. [2022-02-18 17:26:11,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-18 17:26:11,490 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:26:11,490 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:26:11,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-18 17:26:11,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:11,697 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:26:11,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:26:11,698 INFO L85 PathProgramCache]: Analyzing trace with hash 256165081, now seen corresponding path program 8 times [2022-02-18 17:26:11,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:26:11,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393925458] [2022-02-18 17:26:11,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:26:11,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:26:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:26:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:11,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:26:11,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393925458] [2022-02-18 17:26:11,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393925458] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:26:11,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442382462] [2022-02-18 17:26:11,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:26:11,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:11,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:26:11,775 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:26:11,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-18 17:26:11,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:26:11,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:26:11,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-18 17:26:11,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:26:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:11,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:26:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:12,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442382462] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:26:12,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:26:12,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-02-18 17:26:12,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39678836] [2022-02-18 17:26:12,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:26:12,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-18 17:26:12,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:26:12,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-18 17:26:12,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-02-18 17:26:12,151 INFO L87 Difference]: Start difference. First operand 301 states and 692 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:12,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:26:12,531 INFO L93 Difference]: Finished difference Result 524 states and 1132 transitions. [2022-02-18 17:26:12,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-18 17:26:12,531 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-18 17:26:12,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:26:12,533 INFO L225 Difference]: With dead ends: 524 [2022-02-18 17:26:12,533 INFO L226 Difference]: Without dead ends: 520 [2022-02-18 17:26:12,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2022-02-18 17:26:12,534 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 160 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:26:12,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 86 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 17:26:12,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-02-18 17:26:12,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 343. [2022-02-18 17:26:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.324561403508772) internal successors, (795), 342 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) [2022-02-18 17:26:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 795 transitions. [2022-02-18 17:26:12,541 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 795 transitions. Word has length 23 [2022-02-18 17:26:12,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:26:12,541 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 795 transitions. [2022-02-18 17:26:12,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:12,541 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 795 transitions. [2022-02-18 17:26:12,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-18 17:26:12,542 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:26:12,542 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:26:12,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-18 17:26:12,742 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,SelfDestructingSolverStorable9 [2022-02-18 17:26:12,743 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:26:12,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:26:12,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1482502569, now seen corresponding path program 9 times [2022-02-18 17:26:12,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:26:12,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453504853] [2022-02-18 17:26:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:26:12,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:26:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:26:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:12,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:26:12,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453504853] [2022-02-18 17:26:12,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453504853] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:26:12,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692811794] [2022-02-18 17:26:12,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:26:12,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:12,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:26:12,819 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:26:12,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-18 17:26:12,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-18 17:26:12,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:26:12,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-18 17:26:12,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:26:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:12,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:26:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:13,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692811794] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:26:13,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:26:13,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 23 [2022-02-18 17:26:13,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668206426] [2022-02-18 17:26:13,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:26:13,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-18 17:26:13,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:26:13,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-18 17:26:13,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-02-18 17:26:13,147 INFO L87 Difference]: Start difference. First operand 343 states and 795 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:13,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:26:13,756 INFO L93 Difference]: Finished difference Result 809 states and 1674 transitions. [2022-02-18 17:26:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-18 17:26:13,756 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 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 25 [2022-02-18 17:26:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:26:13,759 INFO L225 Difference]: With dead ends: 809 [2022-02-18 17:26:13,759 INFO L226 Difference]: Without dead ends: 809 [2022-02-18 17:26:13,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=782, Invalid=2298, Unknown=0, NotChecked=0, Total=3080 [2022-02-18 17:26:13,760 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 252 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:26:13,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 139 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 17:26:13,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-02-18 17:26:13,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 335. [2022-02-18 17:26:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.338323353293413) internal successors, (781), 334 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:13,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 781 transitions. [2022-02-18 17:26:13,768 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 781 transitions. Word has length 25 [2022-02-18 17:26:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:26:13,768 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 781 transitions. [2022-02-18 17:26:13,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 781 transitions. [2022-02-18 17:26:13,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-18 17:26:13,771 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:26:13,771 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:26:13,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-18 17:26:13,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:13,987 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:26:13,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:26:13,987 INFO L85 PathProgramCache]: Analyzing trace with hash -781200115, now seen corresponding path program 10 times [2022-02-18 17:26:13,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:26:13,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142146874] [2022-02-18 17:26:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:26:13,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:26:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:26:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:14,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:26:14,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142146874] [2022-02-18 17:26:14,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142146874] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:26:14,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409570480] [2022-02-18 17:26:14,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:26:14,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:14,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:26:14,036 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:26:14,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-18 17:26:14,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:26:14,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:26:14,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-18 17:26:14,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:26:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:14,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:26:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:14,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409570480] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:26:14,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:26:14,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2022-02-18 17:26:14,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057354637] [2022-02-18 17:26:14,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:26:14,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-18 17:26:14,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:26:14,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-18 17:26:14,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2022-02-18 17:26:14,389 INFO L87 Difference]: Start difference. First operand 335 states and 781 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:14,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:26:14,985 INFO L93 Difference]: Finished difference Result 532 states and 1139 transitions. [2022-02-18 17:26:14,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-18 17:26:14,985 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:26:14,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:26:14,987 INFO L225 Difference]: With dead ends: 532 [2022-02-18 17:26:14,987 INFO L226 Difference]: Without dead ends: 528 [2022-02-18 17:26:14,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=847, Invalid=2015, Unknown=0, NotChecked=0, Total=2862 [2022-02-18 17:26:14,988 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 189 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:26:14,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 67 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 17:26:14,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-02-18 17:26:14,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 330. [2022-02-18 17:26:14,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.3221884498480243) internal successors, (764), 329 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:14,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 764 transitions. [2022-02-18 17:26:14,994 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 764 transitions. Word has length 25 [2022-02-18 17:26:14,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:26:14,994 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 764 transitions. [2022-02-18 17:26:14,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:14,994 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 764 transitions. [2022-02-18 17:26:14,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-18 17:26:14,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:26:14,995 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:26:15,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-18 17:26:15,207 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,SelfDestructingSolverStorable11 [2022-02-18 17:26:15,208 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:26:15,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:26:15,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1518663275, now seen corresponding path program 11 times [2022-02-18 17:26:15,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:26:15,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140209778] [2022-02-18 17:26:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:26:15,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:26:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:26:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:15,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:26:15,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140209778] [2022-02-18 17:26:15,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140209778] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:26:15,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059408594] [2022-02-18 17:26:15,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:26:15,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:15,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:26:15,367 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:26:15,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-18 17:26:15,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-18 17:26:15,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:26:15,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-18 17:26:15,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:26:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:15,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:26:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:16,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059408594] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:26:16,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:26:16,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-18 17:26:16,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23817628] [2022-02-18 17:26:16,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:26:16,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 17:26:16,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:26:16,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 17:26:16,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-02-18 17:26:16,183 INFO L87 Difference]: Start difference. First operand 330 states and 764 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:26:17,889 INFO L93 Difference]: Finished difference Result 1062 states and 2277 transitions. [2022-02-18 17:26:17,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-18 17:26:17,889 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:26:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:26:17,892 INFO L225 Difference]: With dead ends: 1062 [2022-02-18 17:26:17,892 INFO L226 Difference]: Without dead ends: 940 [2022-02-18 17:26:17,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=839, Invalid=3717, Unknown=0, NotChecked=0, Total=4556 [2022-02-18 17:26:17,893 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 536 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 17:26:17,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 278 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 17:26:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-02-18 17:26:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 434. [2022-02-18 17:26:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.33256351039261) internal successors, (1010), 433 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1010 transitions. [2022-02-18 17:26:17,904 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1010 transitions. Word has length 27 [2022-02-18 17:26:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:26:17,904 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1010 transitions. [2022-02-18 17:26:17,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1010 transitions. [2022-02-18 17:26:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-18 17:26:17,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:26:17,905 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:26:17,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-18 17:26:18,121 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,SelfDestructingSolverStorable12 [2022-02-18 17:26:18,121 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:26:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:26:18,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2127718247, now seen corresponding path program 12 times [2022-02-18 17:26:18,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:26:18,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566216218] [2022-02-18 17:26:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:26:18,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:26:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:26:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:18,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:26:18,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566216218] [2022-02-18 17:26:18,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566216218] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:26:18,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164042130] [2022-02-18 17:26:18,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:26:18,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:18,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:26:18,311 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:26:18,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-18 17:26:18,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-18 17:26:18,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:26:18,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-18 17:26:18,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:26:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:18,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:26:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:19,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164042130] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:26:19,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:26:19,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 35 [2022-02-18 17:26:19,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274568727] [2022-02-18 17:26:19,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:26:19,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-18 17:26:19,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:26:19,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-18 17:26:19,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2022-02-18 17:26:19,596 INFO L87 Difference]: Start difference. First operand 434 states and 1010 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:26:35,165 INFO L93 Difference]: Finished difference Result 2209 states and 4746 transitions. [2022-02-18 17:26:35,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-02-18 17:26:35,165 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:26:35,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:26:35,172 INFO L225 Difference]: With dead ends: 2209 [2022-02-18 17:26:35,172 INFO L226 Difference]: Without dead ends: 2042 [2022-02-18 17:26:35,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15488 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=6410, Invalid=29880, Unknown=0, NotChecked=0, Total=36290 [2022-02-18 17:26:35,177 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 668 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 17:26:35,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 450 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1404 Invalid, 0 Unknown, 528 Unchecked, 0.7s Time] [2022-02-18 17:26:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2022-02-18 17:26:35,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 613. [2022-02-18 17:26:35,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 2.3562091503267975) internal successors, (1442), 612 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:35,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1442 transitions. [2022-02-18 17:26:35,200 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1442 transitions. Word has length 27 [2022-02-18 17:26:35,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:26:35,200 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 1442 transitions. [2022-02-18 17:26:35,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1442 transitions. [2022-02-18 17:26:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-18 17:26:35,202 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:26:35,202 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:26:35,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-18 17:26:35,417 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,SelfDestructingSolverStorable13 [2022-02-18 17:26:35,417 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:26:35,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:26:35,418 INFO L85 PathProgramCache]: Analyzing trace with hash 866515745, now seen corresponding path program 13 times [2022-02-18 17:26:35,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:26:35,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679996354] [2022-02-18 17:26:35,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:26:35,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:26:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:26:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:35,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:26:35,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679996354] [2022-02-18 17:26:35,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679996354] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:26:35,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466614510] [2022-02-18 17:26:35,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:26:35,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:35,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:26:35,606 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:26:35,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-18 17:26:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:26:35,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-18 17:26:35,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:26:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:36,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:26:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:36,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466614510] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:26:36,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:26:36,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 35 [2022-02-18 17:26:36,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6373268] [2022-02-18 17:26:36,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:26:36,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-18 17:26:36,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:26:36,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-18 17:26:36,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2022-02-18 17:26:36,915 INFO L87 Difference]: Start difference. First operand 613 states and 1442 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:26:47,427 INFO L93 Difference]: Finished difference Result 2366 states and 5234 transitions. [2022-02-18 17:26:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-18 17:26:47,431 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:26:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:26:47,438 INFO L225 Difference]: With dead ends: 2366 [2022-02-18 17:26:47,438 INFO L226 Difference]: Without dead ends: 2268 [2022-02-18 17:26:47,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 38 SyntacticMatches, 15 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 10932 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=4841, Invalid=19339, Unknown=0, NotChecked=0, Total=24180 [2022-02-18 17:26:47,440 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 648 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 600 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 17:26:47,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 252 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1014 Invalid, 0 Unknown, 600 Unchecked, 0.6s Time] [2022-02-18 17:26:47,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-02-18 17:26:47,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 748. [2022-02-18 17:26:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.3842034805890227) internal successors, (1781), 747 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:47,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1781 transitions. [2022-02-18 17:26:47,464 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1781 transitions. Word has length 27 [2022-02-18 17:26:47,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:26:47,464 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1781 transitions. [2022-02-18 17:26:47,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:47,465 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1781 transitions. [2022-02-18 17:26:47,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-18 17:26:47,466 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:26:47,466 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:26:47,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-18 17:26:47,675 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,SelfDestructingSolverStorable14 [2022-02-18 17:26:47,675 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:26:47,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:26:47,676 INFO L85 PathProgramCache]: Analyzing trace with hash 597124453, now seen corresponding path program 14 times [2022-02-18 17:26:47,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:26:47,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783560087] [2022-02-18 17:26:47,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:26:47,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:26:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:26:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:47,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:26:47,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783560087] [2022-02-18 17:26:47,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783560087] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:26:47,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307101491] [2022-02-18 17:26:47,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:26:47,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:47,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:26:47,819 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:26:47,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-18 17:26:47,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:26:47,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:26:47,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-18 17:26:47,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:26:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:48,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:26:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:48,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307101491] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:26:48,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:26:48,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-02-18 17:26:48,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054087078] [2022-02-18 17:26:48,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:26:48,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-18 17:26:48,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:26:48,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-18 17:26:48,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-02-18 17:26:48,492 INFO L87 Difference]: Start difference. First operand 748 states and 1781 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:51,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:26:51,029 INFO L93 Difference]: Finished difference Result 2069 states and 4597 transitions. [2022-02-18 17:26:51,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-18 17:26:51,029 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:26:51,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:26:51,035 INFO L225 Difference]: With dead ends: 2069 [2022-02-18 17:26:51,035 INFO L226 Difference]: Without dead ends: 2060 [2022-02-18 17:26:51,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2367, Invalid=7533, Unknown=0, NotChecked=0, Total=9900 [2022-02-18 17:26:51,038 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 538 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 17:26:51,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 235 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-18 17:26:51,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-02-18 17:26:51,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1128. [2022-02-18 17:26:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 2.3895297249334515) internal successors, (2693), 1127 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 2693 transitions. [2022-02-18 17:26:51,061 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 2693 transitions. Word has length 27 [2022-02-18 17:26:51,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:26:51,061 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 2693 transitions. [2022-02-18 17:26:51,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 2693 transitions. [2022-02-18 17:26:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-18 17:26:51,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:26:51,063 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:26:51,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-18 17:26:51,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:51,279 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:26:51,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:26:51,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2036570091, now seen corresponding path program 15 times [2022-02-18 17:26:51,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:26:51,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312964111] [2022-02-18 17:26:51,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:26:51,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:26:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:26:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:51,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:26:51,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312964111] [2022-02-18 17:26:51,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312964111] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:26:51,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548637715] [2022-02-18 17:26:51,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:26:51,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:51,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:26:51,484 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:26:51,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-18 17:26:51,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-18 17:26:51,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:26:51,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-18 17:26:51,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:26:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:52,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:26:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:52,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548637715] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:26:52,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:26:52,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-02-18 17:26:52,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202020279] [2022-02-18 17:26:52,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:26:52,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-18 17:26:52,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:26:52,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-18 17:26:52,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2022-02-18 17:26:52,769 INFO L87 Difference]: Start difference. First operand 1128 states and 2693 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:58,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:26:58,856 INFO L93 Difference]: Finished difference Result 3134 states and 6922 transitions. [2022-02-18 17:26:58,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-02-18 17:26:58,856 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:26:58,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:26:58,866 INFO L225 Difference]: With dead ends: 3134 [2022-02-18 17:26:58,866 INFO L226 Difference]: Without dead ends: 2988 [2022-02-18 17:26:58,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10101 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3863, Invalid=21577, Unknown=0, NotChecked=0, Total=25440 [2022-02-18 17:26:58,868 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 896 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-18 17:26:58,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 481 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1740 Invalid, 0 Unknown, 352 Unchecked, 0.8s Time] [2022-02-18 17:26:58,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2022-02-18 17:26:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 1372. [2022-02-18 17:26:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 2.4033552151714077) internal successors, (3295), 1371 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:58,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 3295 transitions. [2022-02-18 17:26:58,907 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 3295 transitions. Word has length 27 [2022-02-18 17:26:58,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:26:58,907 INFO L470 AbstractCegarLoop]: Abstraction has 1372 states and 3295 transitions. [2022-02-18 17:26:58,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:26:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 3295 transitions. [2022-02-18 17:26:58,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-18 17:26:58,909 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:26:58,909 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:26:58,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-18 17:26:59,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-18 17:26:59,123 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:26:59,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:26:59,124 INFO L85 PathProgramCache]: Analyzing trace with hash 201920533, now seen corresponding path program 16 times [2022-02-18 17:26:59,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:26:59,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164515016] [2022-02-18 17:26:59,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:26:59,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:26:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:26:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:59,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:26:59,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164515016] [2022-02-18 17:26:59,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164515016] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:26:59,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397584922] [2022-02-18 17:26:59,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:26:59,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:59,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:26:59,215 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:26:59,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-18 17:26:59,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:26:59,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:26:59,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-18 17:26:59,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:26:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:59,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:26:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:26:59,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397584922] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:26:59,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:26:59,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 27 [2022-02-18 17:26:59,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666826462] [2022-02-18 17:26:59,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:26:59,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 17:26:59,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:26:59,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 17:26:59,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2022-02-18 17:26:59,999 INFO L87 Difference]: Start difference. First operand 1372 states and 3295 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:01,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:27:01,057 INFO L93 Difference]: Finished difference Result 2372 states and 5544 transitions. [2022-02-18 17:27:01,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-18 17:27:01,057 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-18 17:27:01,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:27:01,064 INFO L225 Difference]: With dead ends: 2372 [2022-02-18 17:27:01,064 INFO L226 Difference]: Without dead ends: 2358 [2022-02-18 17:27:01,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1404, Invalid=3852, Unknown=0, NotChecked=0, Total=5256 [2022-02-18 17:27:01,065 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 367 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 17:27:01,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 117 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-18 17:27:01,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2022-02-18 17:27:01,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1471. [2022-02-18 17:27:01,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.4224489795918367) internal successors, (3561), 1470 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:01,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3561 transitions. [2022-02-18 17:27:01,099 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3561 transitions. Word has length 27 [2022-02-18 17:27:01,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:27:01,099 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 3561 transitions. [2022-02-18 17:27:01,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:01,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3561 transitions. [2022-02-18 17:27:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-18 17:27:01,101 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:27:01,101 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:27:01,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-18 17:27:01,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-18 17:27:01,315 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:27:01,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:27:01,316 INFO L85 PathProgramCache]: Analyzing trace with hash 167708947, now seen corresponding path program 17 times [2022-02-18 17:27:01,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:27:01,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180815683] [2022-02-18 17:27:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:27:01,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:27:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:27:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:01,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:27:01,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180815683] [2022-02-18 17:27:01,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180815683] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:27:01,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865821401] [2022-02-18 17:27:01,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:27:01,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:27:01,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:27:01,395 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:27:01,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-18 17:27:01,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-18 17:27:01,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:27:01,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-18 17:27:01,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:27:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:01,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:27:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:01,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865821401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:27:01,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:27:01,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 30 [2022-02-18 17:27:01,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416798771] [2022-02-18 17:27:01,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:27:01,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-18 17:27:01,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:27:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-18 17:27:02,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-02-18 17:27:02,000 INFO L87 Difference]: Start difference. First operand 1471 states and 3561 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 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) [2022-02-18 17:27:03,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:27:03,024 INFO L93 Difference]: Finished difference Result 2313 states and 5246 transitions. [2022-02-18 17:27:03,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-18 17:27:03,024 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 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 29 [2022-02-18 17:27:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:27:03,031 INFO L225 Difference]: With dead ends: 2313 [2022-02-18 17:27:03,031 INFO L226 Difference]: Without dead ends: 2265 [2022-02-18 17:27:03,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1458, Invalid=4704, Unknown=0, NotChecked=0, Total=6162 [2022-02-18 17:27:03,032 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 487 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 17:27:03,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 132 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-18 17:27:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2022-02-18 17:27:03,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1356. [2022-02-18 17:27:03,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 2.429520295202952) internal successors, (3292), 1355 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:03,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3292 transitions. [2022-02-18 17:27:03,056 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3292 transitions. Word has length 29 [2022-02-18 17:27:03,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:27:03,056 INFO L470 AbstractCegarLoop]: Abstraction has 1356 states and 3292 transitions. [2022-02-18 17:27:03,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 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) [2022-02-18 17:27:03,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3292 transitions. [2022-02-18 17:27:03,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-18 17:27:03,058 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:27:03,058 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:27:03,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-02-18 17:27:03,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:27:03,274 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:27:03,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:27:03,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1561014771, now seen corresponding path program 18 times [2022-02-18 17:27:03,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:27:03,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293328031] [2022-02-18 17:27:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:27:03,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:27:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:27:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:03,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:27:03,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293328031] [2022-02-18 17:27:03,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293328031] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:27:03,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339855705] [2022-02-18 17:27:03,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:27:03,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:27:03,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:27:03,340 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:27:03,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-18 17:27:03,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-18 17:27:03,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:27:03,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-18 17:27:03,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:27:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:03,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:27:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:03,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339855705] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:27:03,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:27:03,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 26 [2022-02-18 17:27:03,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259873020] [2022-02-18 17:27:03,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:27:03,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 17:27:03,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:27:03,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 17:27:03,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2022-02-18 17:27:03,841 INFO L87 Difference]: Start difference. First operand 1356 states and 3292 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:04,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:27:04,788 INFO L93 Difference]: Finished difference Result 1686 states and 3919 transitions. [2022-02-18 17:27:04,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-18 17:27:04,789 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 29 [2022-02-18 17:27:04,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:27:04,794 INFO L225 Difference]: With dead ends: 1686 [2022-02-18 17:27:04,794 INFO L226 Difference]: Without dead ends: 1682 [2022-02-18 17:27:04,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1559, Invalid=3991, Unknown=0, NotChecked=0, Total=5550 [2022-02-18 17:27:04,795 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 229 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:27:04,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 100 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 17:27:04,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-02-18 17:27:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1318. [2022-02-18 17:27:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 2.4229309035687168) internal successors, (3191), 1317 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3191 transitions. [2022-02-18 17:27:04,824 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3191 transitions. Word has length 29 [2022-02-18 17:27:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:27:04,824 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 3191 transitions. [2022-02-18 17:27:04,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3191 transitions. [2022-02-18 17:27:04,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-18 17:27:04,826 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:27:04,826 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:27:04,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-18 17:27:05,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:27:05,039 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:27:05,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:27:05,040 INFO L85 PathProgramCache]: Analyzing trace with hash -634106839, now seen corresponding path program 19 times [2022-02-18 17:27:05,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:27:05,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173715099] [2022-02-18 17:27:05,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:27:05,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:27:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:27:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 17:27:05,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:27:05,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173715099] [2022-02-18 17:27:05,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173715099] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:27:05,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412627097] [2022-02-18 17:27:05,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:27:05,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:27:05,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:27:05,131 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:27:05,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-18 17:27:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:27:05,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-18 17:27:05,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:27:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 17:27:05,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:27:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:06,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412627097] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:27:06,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:27:06,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 28 [2022-02-18 17:27:06,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537006079] [2022-02-18 17:27:06,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:27:06,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-18 17:27:06,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:27:06,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-18 17:27:06,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-02-18 17:27:06,126 INFO L87 Difference]: Start difference. First operand 1318 states and 3191 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2022-02-18 17:27:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:27:08,833 INFO L93 Difference]: Finished difference Result 2767 states and 6117 transitions. [2022-02-18 17:27:08,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-18 17:27:08,833 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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 29 [2022-02-18 17:27:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:27:08,838 INFO L225 Difference]: With dead ends: 2767 [2022-02-18 17:27:08,838 INFO L226 Difference]: Without dead ends: 2752 [2022-02-18 17:27:08,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4065 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2616, Invalid=8304, Unknown=0, NotChecked=0, Total=10920 [2022-02-18 17:27:08,839 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 440 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 17:27:08,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 244 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 17:27:08,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2022-02-18 17:27:08,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 1421. [2022-02-18 17:27:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 2.37887323943662) internal successors, (3378), 1420 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 3378 transitions. [2022-02-18 17:27:08,865 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 3378 transitions. Word has length 29 [2022-02-18 17:27:08,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:27:08,865 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 3378 transitions. [2022-02-18 17:27:08,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2022-02-18 17:27:08,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 3378 transitions. [2022-02-18 17:27:08,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-18 17:27:08,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:27:08,868 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:27:08,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-18 17:27:09,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:27:09,084 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:27:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:27:09,084 INFO L85 PathProgramCache]: Analyzing trace with hash -870593497, now seen corresponding path program 20 times [2022-02-18 17:27:09,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:27:09,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364842694] [2022-02-18 17:27:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:27:09,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:27:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:27:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:09,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:27:09,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364842694] [2022-02-18 17:27:09,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364842694] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:27:09,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798274661] [2022-02-18 17:27:09,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:27:09,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:27:09,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:27:09,294 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:27:09,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-18 17:27:09,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:27:09,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:27:09,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 17:27:09,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:27:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:09,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:27:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:10,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798274661] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:27:10,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:27:10,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 37 [2022-02-18 17:27:10,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858157239] [2022-02-18 17:27:10,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:27:10,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-18 17:27:10,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:27:10,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-18 17:27:10,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1067, Unknown=0, NotChecked=0, Total=1332 [2022-02-18 17:27:10,886 INFO L87 Difference]: Start difference. First operand 1421 states and 3378 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:16,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:27:16,630 INFO L93 Difference]: Finished difference Result 2866 states and 6426 transitions. [2022-02-18 17:27:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-18 17:27:16,631 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:27:16,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:27:16,635 INFO L225 Difference]: With dead ends: 2866 [2022-02-18 17:27:16,635 INFO L226 Difference]: Without dead ends: 2794 [2022-02-18 17:27:16,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4993 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2991, Invalid=10349, Unknown=0, NotChecked=0, Total=13340 [2022-02-18 17:27:16,636 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 554 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 17:27:16,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 410 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1561 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 17:27:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2022-02-18 17:27:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 1543. [2022-02-18 17:27:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 2.3605706874189365) internal successors, (3640), 1542 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 3640 transitions. [2022-02-18 17:27:16,670 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 3640 transitions. Word has length 29 [2022-02-18 17:27:16,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:27:16,670 INFO L470 AbstractCegarLoop]: Abstraction has 1543 states and 3640 transitions. [2022-02-18 17:27:16,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 3640 transitions. [2022-02-18 17:27:16,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 17:27:16,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:27:16,672 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:27:16,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-18 17:27:16,889 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,SelfDestructingSolverStorable21 [2022-02-18 17:27:16,890 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:27:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:27:16,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1331432529, now seen corresponding path program 21 times [2022-02-18 17:27:16,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:27:16,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344947207] [2022-02-18 17:27:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:27:16,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:27:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:27:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:17,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:27:17,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344947207] [2022-02-18 17:27:17,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344947207] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:27:17,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400174352] [2022-02-18 17:27:17,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:27:17,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:27:17,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:27:17,084 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:27:17,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-18 17:27:17,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-18 17:27:17,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:27:17,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-18 17:27:17,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:27:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:17,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:27:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:18,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400174352] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:27:18,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:27:18,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-18 17:27:18,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713906795] [2022-02-18 17:27:18,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:27:18,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-18 17:27:18,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:27:18,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-18 17:27:18,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1239, Unknown=0, NotChecked=0, Total=1560 [2022-02-18 17:27:18,169 INFO L87 Difference]: Start difference. First operand 1543 states and 3640 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:23,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:27:23,820 INFO L93 Difference]: Finished difference Result 3195 states and 7142 transitions. [2022-02-18 17:27:23,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-02-18 17:27:23,820 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:27:23,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:27:23,825 INFO L225 Difference]: With dead ends: 3195 [2022-02-18 17:27:23,825 INFO L226 Difference]: Without dead ends: 3182 [2022-02-18 17:27:23,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8119 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3862, Invalid=17308, Unknown=0, NotChecked=0, Total=21170 [2022-02-18 17:27:23,826 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 588 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 17:27:23,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 307 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1322 Invalid, 0 Unknown, 541 Unchecked, 0.6s Time] [2022-02-18 17:27:23,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2022-02-18 17:27:23,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 1828. [2022-02-18 17:27:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 2.3787629994526545) internal successors, (4346), 1827 states have internal predecessors, (4346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 4346 transitions. [2022-02-18 17:27:23,861 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 4346 transitions. Word has length 31 [2022-02-18 17:27:23,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:27:23,861 INFO L470 AbstractCegarLoop]: Abstraction has 1828 states and 4346 transitions. [2022-02-18 17:27:23,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:23,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 4346 transitions. [2022-02-18 17:27:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 17:27:23,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:27:23,864 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:27:23,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-18 17:27:24,079 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,SelfDestructingSolverStorable22 [2022-02-18 17:27:24,080 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:27:24,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:27:24,080 INFO L85 PathProgramCache]: Analyzing trace with hash -87583581, now seen corresponding path program 22 times [2022-02-18 17:27:24,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:27:24,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959738925] [2022-02-18 17:27:24,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:27:24,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:27:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:27:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:24,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:27:24,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959738925] [2022-02-18 17:27:24,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959738925] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:27:24,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393386148] [2022-02-18 17:27:24,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:27:24,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:27:24,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:27:24,296 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:27:24,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-18 17:27:24,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:27:24,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:27:24,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-18 17:27:24,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:27:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:24,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:27:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:26,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393386148] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:27:26,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:27:26,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-02-18 17:27:26,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175986918] [2022-02-18 17:27:26,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:27:26,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-18 17:27:26,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:27:26,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-18 17:27:26,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2022-02-18 17:27:26,086 INFO L87 Difference]: Start difference. First operand 1828 states and 4346 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:43,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:27:43,710 INFO L93 Difference]: Finished difference Result 4237 states and 9400 transitions. [2022-02-18 17:27:43,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-02-18 17:27:43,711 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:27:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:27:43,723 INFO L225 Difference]: With dead ends: 4237 [2022-02-18 17:27:43,723 INFO L226 Difference]: Without dead ends: 4083 [2022-02-18 17:27:43,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 42 SyntacticMatches, 23 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 18335 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=5852, Invalid=33154, Unknown=0, NotChecked=0, Total=39006 [2022-02-18 17:27:43,725 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 874 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 2366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:27:43,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 693 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 2366 Invalid, 0 Unknown, 208 Unchecked, 1.2s Time] [2022-02-18 17:27:43,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2022-02-18 17:27:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 2081. [2022-02-18 17:27:43,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 2.3653846153846154) internal successors, (4920), 2080 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 4920 transitions. [2022-02-18 17:27:43,772 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 4920 transitions. Word has length 31 [2022-02-18 17:27:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:27:43,772 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 4920 transitions. [2022-02-18 17:27:43,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:27:43,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 4920 transitions. [2022-02-18 17:27:43,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 17:27:43,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:27:43,775 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:27:43,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-18 17:27:43,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:27:43,987 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:27:43,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:27:43,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1093246803, now seen corresponding path program 23 times [2022-02-18 17:27:43,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:27:43,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414010875] [2022-02-18 17:27:43,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:27:43,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:27:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:27:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:44,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:27:44,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414010875] [2022-02-18 17:27:44,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414010875] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:27:44,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327352069] [2022-02-18 17:27:44,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:27:44,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:27:44,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:27:44,218 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:27:44,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-18 17:27:44,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-18 17:27:44,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:27:44,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-18 17:27:44,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:27:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:44,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:27:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:27:46,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327352069] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:27:46,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:27:46,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-02-18 17:27:46,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799305697] [2022-02-18 17:27:46,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:27:46,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-18 17:27:46,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:27:46,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-18 17:27:46,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2022-02-18 17:27:46,163 INFO L87 Difference]: Start difference. First operand 2081 states and 4920 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:03,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:28:03,900 INFO L93 Difference]: Finished difference Result 4464 states and 9835 transitions. [2022-02-18 17:28:03,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-02-18 17:28:03,901 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:28:03,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:28:03,907 INFO L225 Difference]: With dead ends: 4464 [2022-02-18 17:28:03,907 INFO L226 Difference]: Without dead ends: 4313 [2022-02-18 17:28:03,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 47 SyntacticMatches, 24 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15729 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=5838, Invalid=28944, Unknown=0, NotChecked=0, Total=34782 [2022-02-18 17:28:03,909 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 885 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 2205 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:28:03,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 406 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2205 Invalid, 0 Unknown, 124 Unchecked, 1.2s Time] [2022-02-18 17:28:03,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2022-02-18 17:28:03,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 2299. [2022-02-18 17:28:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 2.365100087032202) internal successors, (5435), 2298 states have internal predecessors, (5435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 5435 transitions. [2022-02-18 17:28:03,951 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 5435 transitions. Word has length 31 [2022-02-18 17:28:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:28:03,951 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 5435 transitions. [2022-02-18 17:28:03,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 5435 transitions. [2022-02-18 17:28:03,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 17:28:03,955 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:28:03,955 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:28:03,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-18 17:28:04,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:28:04,171 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:28:04,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:28:04,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1903086369, now seen corresponding path program 24 times [2022-02-18 17:28:04,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:28:04,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843132837] [2022-02-18 17:28:04,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:28:04,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:28:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:28:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:04,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:28:04,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843132837] [2022-02-18 17:28:04,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843132837] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:28:04,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197894279] [2022-02-18 17:28:04,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:28:04,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:28:04,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:28:04,380 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:28:04,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-18 17:28:04,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-18 17:28:04,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:28:04,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-18 17:28:04,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:28:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:04,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:28:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:05,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197894279] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:28:05,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:28:05,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2022-02-18 17:28:05,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581749971] [2022-02-18 17:28:05,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:28:05,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-18 17:28:05,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:28:05,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-18 17:28:05,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-02-18 17:28:05,304 INFO L87 Difference]: Start difference. First operand 2299 states and 5435 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:11,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:28:11,346 INFO L93 Difference]: Finished difference Result 6164 states and 13824 transitions. [2022-02-18 17:28:11,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-02-18 17:28:11,346 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:28:11,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:28:11,360 INFO L225 Difference]: With dead ends: 6164 [2022-02-18 17:28:11,360 INFO L226 Difference]: Without dead ends: 6119 [2022-02-18 17:28:11,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12231 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=6371, Invalid=23041, Unknown=0, NotChecked=0, Total=29412 [2022-02-18 17:28:11,362 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 720 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 17:28:11,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 280 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 17:28:11,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6119 states. [2022-02-18 17:28:11,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6119 to 3767. [2022-02-18 17:28:11,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 2.374137015400956) internal successors, (8941), 3766 states have internal predecessors, (8941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:11,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 8941 transitions. [2022-02-18 17:28:11,434 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 8941 transitions. Word has length 31 [2022-02-18 17:28:11,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:28:11,434 INFO L470 AbstractCegarLoop]: Abstraction has 3767 states and 8941 transitions. [2022-02-18 17:28:11,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:11,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 8941 transitions. [2022-02-18 17:28:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 17:28:11,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:28:11,439 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:28:11,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-18 17:28:11,655 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,SelfDestructingSolverStorable25 [2022-02-18 17:28:11,655 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:28:11,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:28:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash -904596441, now seen corresponding path program 25 times [2022-02-18 17:28:11,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:28:11,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763532607] [2022-02-18 17:28:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:28:11,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:28:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:28:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:11,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:28:11,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763532607] [2022-02-18 17:28:11,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763532607] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:28:11,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865006660] [2022-02-18 17:28:11,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:28:11,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:28:11,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:28:11,884 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:28:11,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-18 17:28:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:28:11,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-18 17:28:11,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:28:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:12,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:28:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:13,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865006660] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:28:13,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:28:13,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-18 17:28:13,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198881963] [2022-02-18 17:28:13,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:28:13,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-18 17:28:13,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:28:13,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-18 17:28:13,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2022-02-18 17:28:13,170 INFO L87 Difference]: Start difference. First operand 3767 states and 8941 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:18,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:28:18,994 INFO L93 Difference]: Finished difference Result 6121 states and 14073 transitions. [2022-02-18 17:28:18,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-18 17:28:18,995 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:28:18,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:28:19,003 INFO L225 Difference]: With dead ends: 6121 [2022-02-18 17:28:19,003 INFO L226 Difference]: Without dead ends: 6005 [2022-02-18 17:28:19,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 42 SyntacticMatches, 10 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8029 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3648, Invalid=16374, Unknown=0, NotChecked=0, Total=20022 [2022-02-18 17:28:19,004 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 530 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 17:28:19,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 225 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1325 Invalid, 0 Unknown, 658 Unchecked, 0.6s Time] [2022-02-18 17:28:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2022-02-18 17:28:19,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 3993. [2022-02-18 17:28:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3993 states, 3992 states have (on average 2.3599699398797593) internal successors, (9421), 3992 states have internal predecessors, (9421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 9421 transitions. [2022-02-18 17:28:19,074 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 9421 transitions. Word has length 31 [2022-02-18 17:28:19,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:28:19,074 INFO L470 AbstractCegarLoop]: Abstraction has 3993 states and 9421 transitions. [2022-02-18 17:28:19,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:19,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 9421 transitions. [2022-02-18 17:28:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 17:28:19,079 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:28:19,079 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:28:19,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-18 17:28:19,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-18 17:28:19,295 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:28:19,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:28:19,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1973777929, now seen corresponding path program 26 times [2022-02-18 17:28:19,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:28:19,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121506476] [2022-02-18 17:28:19,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:28:19,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:28:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:28:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:19,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:28:19,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121506476] [2022-02-18 17:28:19,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121506476] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:28:19,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423061854] [2022-02-18 17:28:19,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:28:19,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:28:19,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:28:19,504 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:28:19,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-18 17:28:19,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:28:19,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:28:19,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-18 17:28:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:28:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:20,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:28:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:21,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423061854] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:28:21,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:28:21,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-02-18 17:28:21,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816524777] [2022-02-18 17:28:21,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:28:21,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-18 17:28:21,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:28:21,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-18 17:28:21,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2022-02-18 17:28:21,393 INFO L87 Difference]: Start difference. First operand 3993 states and 9421 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:28:44,235 INFO L93 Difference]: Finished difference Result 9171 states and 20860 transitions. [2022-02-18 17:28:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2022-02-18 17:28:44,235 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:28:44,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:28:44,245 INFO L225 Difference]: With dead ends: 9171 [2022-02-18 17:28:44,245 INFO L226 Difference]: Without dead ends: 9012 [2022-02-18 17:28:44,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 45 SyntacticMatches, 20 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 30286 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=10481, Invalid=54799, Unknown=0, NotChecked=0, Total=65280 [2022-02-18 17:28:44,248 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1050 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:28:44,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 500 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 2037 Invalid, 0 Unknown, 660 Unchecked, 1.2s Time] [2022-02-18 17:28:44,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9012 states. [2022-02-18 17:28:44,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9012 to 4514. [2022-02-18 17:28:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4514 states, 4513 states have (on average 2.348991801462442) internal successors, (10601), 4513 states have internal predecessors, (10601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:44,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4514 states to 4514 states and 10601 transitions. [2022-02-18 17:28:44,361 INFO L78 Accepts]: Start accepts. Automaton has 4514 states and 10601 transitions. Word has length 31 [2022-02-18 17:28:44,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:28:44,361 INFO L470 AbstractCegarLoop]: Abstraction has 4514 states and 10601 transitions. [2022-02-18 17:28:44,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:44,362 INFO L276 IsEmpty]: Start isEmpty. Operand 4514 states and 10601 transitions. [2022-02-18 17:28:44,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 17:28:44,367 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:28:44,367 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:28:44,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-18 17:28:44,567 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,SelfDestructingSolverStorable27 [2022-02-18 17:28:44,568 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:28:44,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:28:44,568 INFO L85 PathProgramCache]: Analyzing trace with hash 35494899, now seen corresponding path program 27 times [2022-02-18 17:28:44,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:28:44,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018647257] [2022-02-18 17:28:44,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:28:44,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:28:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:28:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:44,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:28:44,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018647257] [2022-02-18 17:28:44,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018647257] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:28:44,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012209942] [2022-02-18 17:28:44,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:28:44,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:28:44,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:28:44,741 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:28:44,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-18 17:28:44,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-18 17:28:44,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:28:44,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-18 17:28:44,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:28:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:45,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:28:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:45,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012209942] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:28:45,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:28:45,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 36 [2022-02-18 17:28:45,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336039338] [2022-02-18 17:28:45,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:28:45,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-18 17:28:45,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:28:45,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-18 17:28:45,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2022-02-18 17:28:45,710 INFO L87 Difference]: Start difference. First operand 4514 states and 10601 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:48,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:28:48,343 INFO L93 Difference]: Finished difference Result 7799 states and 18028 transitions. [2022-02-18 17:28:48,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-18 17:28:48,343 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:28:48,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:28:48,353 INFO L225 Difference]: With dead ends: 7799 [2022-02-18 17:28:48,353 INFO L226 Difference]: Without dead ends: 7793 [2022-02-18 17:28:48,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3365 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2444, Invalid=7258, Unknown=0, NotChecked=0, Total=9702 [2022-02-18 17:28:48,355 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 648 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 17:28:48,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 210 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-18 17:28:48,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2022-02-18 17:28:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 5845. [2022-02-18 17:28:48,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5845 states, 5844 states have (on average 2.384154688569473) internal successors, (13933), 5844 states have internal predecessors, (13933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5845 states to 5845 states and 13933 transitions. [2022-02-18 17:28:48,465 INFO L78 Accepts]: Start accepts. Automaton has 5845 states and 13933 transitions. Word has length 31 [2022-02-18 17:28:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:28:48,465 INFO L470 AbstractCegarLoop]: Abstraction has 5845 states and 13933 transitions. [2022-02-18 17:28:48,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:48,466 INFO L276 IsEmpty]: Start isEmpty. Operand 5845 states and 13933 transitions. [2022-02-18 17:28:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 17:28:48,473 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:28:48,473 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:28:48,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-18 17:28:48,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-18 17:28:48,689 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:28:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:28:48,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1960214635, now seen corresponding path program 28 times [2022-02-18 17:28:48,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:28:48,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999971502] [2022-02-18 17:28:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:28:48,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:28:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:28:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 17:28:48,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:28:48,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999971502] [2022-02-18 17:28:48,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999971502] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:28:48,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952056842] [2022-02-18 17:28:48,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:28:48,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:28:48,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:28:48,847 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:28:48,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-18 17:28:48,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:28:48,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:28:48,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-18 17:28:48,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:28:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 17:28:49,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:28:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:49,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952056842] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:28:49,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:28:49,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-02-18 17:28:49,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649473123] [2022-02-18 17:28:49,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:28:49,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-18 17:28:49,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:28:49,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-18 17:28:49,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2022-02-18 17:28:49,752 INFO L87 Difference]: Start difference. First operand 5845 states and 13933 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:28:51,154 INFO L93 Difference]: Finished difference Result 7411 states and 17541 transitions. [2022-02-18 17:28:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-18 17:28:51,161 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-18 17:28:51,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:28:51,171 INFO L225 Difference]: With dead ends: 7411 [2022-02-18 17:28:51,172 INFO L226 Difference]: Without dead ends: 7388 [2022-02-18 17:28:51,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1290, Invalid=3680, Unknown=0, NotChecked=0, Total=4970 [2022-02-18 17:28:51,173 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 362 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 17:28:51,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 181 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-18 17:28:51,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2022-02-18 17:28:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 6246. [2022-02-18 17:28:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6246 states, 6245 states have (on average 2.387990392313851) internal successors, (14913), 6245 states have internal predecessors, (14913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:51,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6246 states to 6246 states and 14913 transitions. [2022-02-18 17:28:51,279 INFO L78 Accepts]: Start accepts. Automaton has 6246 states and 14913 transitions. Word has length 31 [2022-02-18 17:28:51,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:28:51,279 INFO L470 AbstractCegarLoop]: Abstraction has 6246 states and 14913 transitions. [2022-02-18 17:28:51,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:51,279 INFO L276 IsEmpty]: Start isEmpty. Operand 6246 states and 14913 transitions. [2022-02-18 17:28:51,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 17:28:51,287 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:28:51,287 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:28:51,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-18 17:28:51,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:28:51,503 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:28:51,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:28:51,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1947749671, now seen corresponding path program 29 times [2022-02-18 17:28:51,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:28:51,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008951557] [2022-02-18 17:28:51,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:28:51,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:28:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:28:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:51,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:28:51,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008951557] [2022-02-18 17:28:51,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008951557] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:28:51,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212700845] [2022-02-18 17:28:51,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:28:51,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:28:51,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:28:51,687 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:28:51,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-18 17:28:51,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-18 17:28:51,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:28:51,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-18 17:28:51,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:28:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:52,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:28:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:52,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212700845] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:28:52,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:28:52,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 34 [2022-02-18 17:28:52,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704203915] [2022-02-18 17:28:52,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:28:52,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-18 17:28:52,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:28:52,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-18 17:28:52,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2022-02-18 17:28:52,684 INFO L87 Difference]: Start difference. First operand 6246 states and 14913 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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) [2022-02-18 17:28:55,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:28:55,967 INFO L93 Difference]: Finished difference Result 9896 states and 23200 transitions. [2022-02-18 17:28:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-18 17:28:55,967 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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) Word has length 31 [2022-02-18 17:28:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:28:55,981 INFO L225 Difference]: With dead ends: 9896 [2022-02-18 17:28:55,981 INFO L226 Difference]: Without dead ends: 9869 [2022-02-18 17:28:55,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3944 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2625, Invalid=8505, Unknown=0, NotChecked=0, Total=11130 [2022-02-18 17:28:55,982 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 442 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 17:28:55,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 262 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-18 17:28:55,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9869 states. [2022-02-18 17:28:56,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9869 to 7467. [2022-02-18 17:28:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7467 states, 7466 states have (on average 2.40208947227431) internal successors, (17934), 7466 states have internal predecessors, (17934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:28:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7467 states to 7467 states and 17934 transitions. [2022-02-18 17:28:56,133 INFO L78 Accepts]: Start accepts. Automaton has 7467 states and 17934 transitions. Word has length 31 [2022-02-18 17:28:56,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:28:56,133 INFO L470 AbstractCegarLoop]: Abstraction has 7467 states and 17934 transitions. [2022-02-18 17:28:56,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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) [2022-02-18 17:28:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand 7467 states and 17934 transitions. [2022-02-18 17:28:56,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 17:28:56,142 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:28:56,142 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:28:56,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-18 17:28:56,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:28:56,359 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:28:56,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:28:56,360 INFO L85 PathProgramCache]: Analyzing trace with hash -352748575, now seen corresponding path program 30 times [2022-02-18 17:28:56,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:28:56,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010094144] [2022-02-18 17:28:56,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:28:56,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:28:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:28:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 17:28:56,569 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:28:56,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010094144] [2022-02-18 17:28:56,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010094144] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:28:56,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066218621] [2022-02-18 17:28:56,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:28:56,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:28:56,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:28:56,570 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:28:56,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-18 17:28:56,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-18 17:28:56,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:28:56,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-18 17:28:56,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:28:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:57,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:28:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:28:58,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066218621] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:28:58,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:28:58,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 40 [2022-02-18 17:28:58,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188526147] [2022-02-18 17:28:58,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:28:58,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-18 17:28:58,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:28:58,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-18 17:28:58,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1287, Unknown=0, NotChecked=0, Total=1560 [2022-02-18 17:28:58,041 INFO L87 Difference]: Start difference. First operand 7467 states and 17934 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:29:14,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:29:14,176 INFO L93 Difference]: Finished difference Result 12255 states and 28618 transitions. [2022-02-18 17:29:14,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-02-18 17:29:14,177 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:29:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:29:14,192 INFO L225 Difference]: With dead ends: 12255 [2022-02-18 17:29:14,193 INFO L226 Difference]: Without dead ends: 12086 [2022-02-18 17:29:14,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22716 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=6944, Invalid=47112, Unknown=0, NotChecked=0, Total=54056 [2022-02-18 17:29:14,195 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 840 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 2717 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 2717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-18 17:29:14,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 600 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 2717 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-18 17:29:14,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12086 states. [2022-02-18 17:29:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12086 to 7931. [2022-02-18 17:29:14,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 2.4058007566204287) internal successors, (19078), 7930 states have internal predecessors, (19078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:29:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 19078 transitions. [2022-02-18 17:29:14,342 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 19078 transitions. Word has length 31 [2022-02-18 17:29:14,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:29:14,342 INFO L470 AbstractCegarLoop]: Abstraction has 7931 states and 19078 transitions. [2022-02-18 17:29:14,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:29:14,343 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 19078 transitions. [2022-02-18 17:29:14,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 17:29:14,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:29:14,352 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:29:14,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-18 17:29:14,552 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,SelfDestructingSolverStorable31 [2022-02-18 17:29:14,553 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:29:14,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:29:14,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1441871721, now seen corresponding path program 31 times [2022-02-18 17:29:14,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:29:14,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615771865] [2022-02-18 17:29:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:29:14,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:29:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:29:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-18 17:29:14,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:29:14,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615771865] [2022-02-18 17:29:14,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615771865] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:29:14,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573608888] [2022-02-18 17:29:14,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:29:14,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:29:14,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:29:14,752 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:29:14,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-18 17:29:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:29:14,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-18 17:29:14,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:29:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:29:15,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:29:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:29:16,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573608888] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:29:16,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:29:16,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 39 [2022-02-18 17:29:16,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938518780] [2022-02-18 17:29:16,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:29:16,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-18 17:29:16,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:29:16,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-18 17:29:16,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1175, Unknown=0, NotChecked=0, Total=1482 [2022-02-18 17:29:16,510 INFO L87 Difference]: Start difference. First operand 7931 states and 19078 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:29:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:29:29,355 INFO L93 Difference]: Finished difference Result 14065 states and 33184 transitions. [2022-02-18 17:29:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-02-18 17:29:29,355 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:29:29,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:29:29,374 INFO L225 Difference]: With dead ends: 14065 [2022-02-18 17:29:29,375 INFO L226 Difference]: Without dead ends: 13939 [2022-02-18 17:29:29,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11148 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=6150, Invalid=22920, Unknown=0, NotChecked=0, Total=29070 [2022-02-18 17:29:29,376 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 809 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:29:29,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 529 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-18 17:29:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13939 states. [2022-02-18 17:29:29,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13939 to 8747. [2022-02-18 17:29:29,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8747 states, 8746 states have (on average 2.4141321747084383) internal successors, (21114), 8746 states have internal predecessors, (21114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:29:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8747 states to 8747 states and 21114 transitions. [2022-02-18 17:29:29,577 INFO L78 Accepts]: Start accepts. Automaton has 8747 states and 21114 transitions. Word has length 31 [2022-02-18 17:29:29,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:29:29,577 INFO L470 AbstractCegarLoop]: Abstraction has 8747 states and 21114 transitions. [2022-02-18 17:29:29,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:29:29,577 INFO L276 IsEmpty]: Start isEmpty. Operand 8747 states and 21114 transitions. [2022-02-18 17:29:29,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 17:29:29,586 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:29:29,586 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:29:29,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-18 17:29:29,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:29:29,786 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:29:29,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:29:29,787 INFO L85 PathProgramCache]: Analyzing trace with hash -74939733, now seen corresponding path program 32 times [2022-02-18 17:29:29,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:29:29,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674664880] [2022-02-18 17:29:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:29:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:29:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:29:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:29:29,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:29:29,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674664880] [2022-02-18 17:29:29,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674664880] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:29:29,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646996840] [2022-02-18 17:29:29,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:29:29,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:29:30,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:29:30,001 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:29:30,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-18 17:29:30,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:29:30,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:29:30,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-18 17:29:30,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:29:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:29:30,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:29:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:29:31,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646996840] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:29:31,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:29:31,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-18 17:29:31,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60114058] [2022-02-18 17:29:31,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:29:31,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-18 17:29:31,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:29:31,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-18 17:29:31,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2022-02-18 17:29:31,549 INFO L87 Difference]: Start difference. First operand 8747 states and 21114 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:29:44,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:29:44,640 INFO L93 Difference]: Finished difference Result 18782 states and 44443 transitions. [2022-02-18 17:29:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2022-02-18 17:29:44,640 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:29:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:29:44,667 INFO L225 Difference]: With dead ends: 18782 [2022-02-18 17:29:44,667 INFO L226 Difference]: Without dead ends: 18757 [2022-02-18 17:29:44,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28310 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=8746, Invalid=56534, Unknown=0, NotChecked=0, Total=65280 [2022-02-18 17:29:44,670 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 705 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 692 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-18 17:29:44,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 478 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 2092 Invalid, 0 Unknown, 692 Unchecked, 1.0s Time] [2022-02-18 17:29:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18757 states. [2022-02-18 17:29:44,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18757 to 9498. [2022-02-18 17:29:44,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9498 states, 9497 states have (on average 2.419816784247657) internal successors, (22981), 9497 states have internal predecessors, (22981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:29:44,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9498 states to 9498 states and 22981 transitions. [2022-02-18 17:29:44,909 INFO L78 Accepts]: Start accepts. Automaton has 9498 states and 22981 transitions. Word has length 31 [2022-02-18 17:29:44,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:29:44,909 INFO L470 AbstractCegarLoop]: Abstraction has 9498 states and 22981 transitions. [2022-02-18 17:29:44,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:29:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand 9498 states and 22981 transitions. [2022-02-18 17:29:44,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 17:29:44,919 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:29:44,919 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:29:44,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-18 17:29:45,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:29:45,119 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:29:45,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:29:45,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2119534507, now seen corresponding path program 33 times [2022-02-18 17:29:45,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:29:45,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169704107] [2022-02-18 17:29:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:29:45,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:29:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:29:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:29:45,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:29:45,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169704107] [2022-02-18 17:29:45,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169704107] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:29:45,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992770436] [2022-02-18 17:29:45,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:29:45,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:29:45,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:29:45,288 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:29:45,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-18 17:29:45,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-18 17:29:45,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:29:45,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-18 17:29:45,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:29:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:29:45,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:29:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:29:46,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992770436] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:29:46,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:29:46,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2022-02-18 17:29:46,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966962469] [2022-02-18 17:29:46,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:29:46,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-18 17:29:46,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:29:46,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-18 17:29:46,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2022-02-18 17:29:46,215 INFO L87 Difference]: Start difference. First operand 9498 states and 22981 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:29:49,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:29:49,444 INFO L93 Difference]: Finished difference Result 13376 states and 31636 transitions. [2022-02-18 17:29:49,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-18 17:29:49,444 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:29:49,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:29:49,463 INFO L225 Difference]: With dead ends: 13376 [2022-02-18 17:29:49,463 INFO L226 Difference]: Without dead ends: 13355 [2022-02-18 17:29:49,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4718 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3140, Invalid=9742, Unknown=0, NotChecked=0, Total=12882 [2022-02-18 17:29:49,464 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 671 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 17:29:49,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 377 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-18 17:29:49,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13355 states. [2022-02-18 17:29:49,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13355 to 9888. [2022-02-18 17:29:49,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9888 states, 9887 states have (on average 2.43633053504602) internal successors, (24088), 9887 states have internal predecessors, (24088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:29:49,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9888 states to 9888 states and 24088 transitions. [2022-02-18 17:29:49,632 INFO L78 Accepts]: Start accepts. Automaton has 9888 states and 24088 transitions. Word has length 31 [2022-02-18 17:29:49,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:29:49,632 INFO L470 AbstractCegarLoop]: Abstraction has 9888 states and 24088 transitions. [2022-02-18 17:29:49,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:29:49,632 INFO L276 IsEmpty]: Start isEmpty. Operand 9888 states and 24088 transitions. [2022-02-18 17:29:49,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 17:29:49,641 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:29:49,641 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:29:49,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-18 17:29:49,841 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,SelfDestructingSolverStorable34 [2022-02-18 17:29:49,842 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:29:49,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:29:49,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1454095937, now seen corresponding path program 34 times [2022-02-18 17:29:49,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:29:49,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083082014] [2022-02-18 17:29:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:29:49,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:29:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:29:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 17:29:50,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:29:50,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083082014] [2022-02-18 17:29:50,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083082014] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:29:50,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508038560] [2022-02-18 17:29:50,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:29:50,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:29:50,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:29:50,039 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:29:50,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-18 17:29:50,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:29:50,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:29:50,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-18 17:29:50,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:29:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:29:50,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:29:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:29:51,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508038560] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:29:51,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:29:51,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 40 [2022-02-18 17:29:51,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734706353] [2022-02-18 17:29:51,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:29:51,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-18 17:29:51,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:29:51,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-18 17:29:51,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2022-02-18 17:29:51,903 INFO L87 Difference]: Start difference. First operand 9888 states and 24088 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:30:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:30:13,745 INFO L93 Difference]: Finished difference Result 17705 states and 41885 transitions. [2022-02-18 17:30:13,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2022-02-18 17:30:13,745 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:30:13,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:30:13,771 INFO L225 Difference]: With dead ends: 17705 [2022-02-18 17:30:13,771 INFO L226 Difference]: Without dead ends: 17594 [2022-02-18 17:30:13,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 45 SyntacticMatches, 17 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 30848 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=10018, Invalid=56288, Unknown=0, NotChecked=0, Total=66306 [2022-02-18 17:30:13,774 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 949 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-18 17:30:13,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 639 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 2540 Invalid, 0 Unknown, 155 Unchecked, 1.3s Time] [2022-02-18 17:30:13,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17594 states. [2022-02-18 17:30:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17594 to 10848. [2022-02-18 17:30:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10848 states, 10847 states have (on average 2.433576103991887) internal successors, (26397), 10847 states have internal predecessors, (26397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:30:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10848 states to 10848 states and 26397 transitions. [2022-02-18 17:30:13,979 INFO L78 Accepts]: Start accepts. Automaton has 10848 states and 26397 transitions. Word has length 31 [2022-02-18 17:30:13,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:30:13,979 INFO L470 AbstractCegarLoop]: Abstraction has 10848 states and 26397 transitions. [2022-02-18 17:30:13,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:30:13,979 INFO L276 IsEmpty]: Start isEmpty. Operand 10848 states and 26397 transitions. [2022-02-18 17:30:13,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 17:30:13,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:30:13,989 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:30:14,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-18 17:30:14,189 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,SelfDestructingSolverStorable35 [2022-02-18 17:30:14,189 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:30:14,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:30:14,190 INFO L85 PathProgramCache]: Analyzing trace with hash -492324689, now seen corresponding path program 35 times [2022-02-18 17:30:14,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:30:14,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323679847] [2022-02-18 17:30:14,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:30:14,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:30:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:30:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:14,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:30:14,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323679847] [2022-02-18 17:30:14,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323679847] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:30:14,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117043955] [2022-02-18 17:30:14,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:30:14,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:30:14,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:30:14,413 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:30:14,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-18 17:30:14,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-18 17:30:14,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:30:14,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-18 17:30:14,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:30:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:15,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:30:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:16,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117043955] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:30:16,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:30:16,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-18 17:30:16,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428138561] [2022-02-18 17:30:16,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:30:16,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-18 17:30:16,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:30:16,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-18 17:30:16,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2022-02-18 17:30:16,003 INFO L87 Difference]: Start difference. First operand 10848 states and 26397 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:30:28,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:30:28,667 INFO L93 Difference]: Finished difference Result 17432 states and 41445 transitions. [2022-02-18 17:30:28,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2022-02-18 17:30:28,668 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:30:28,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:30:28,694 INFO L225 Difference]: With dead ends: 17432 [2022-02-18 17:30:28,694 INFO L226 Difference]: Without dead ends: 17272 [2022-02-18 17:30:28,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25305 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=8414, Invalid=50878, Unknown=0, NotChecked=0, Total=59292 [2022-02-18 17:30:28,697 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 909 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 3132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 540 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:30:28,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 432 Invalid, 3132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 2293 Invalid, 0 Unknown, 540 Unchecked, 1.1s Time] [2022-02-18 17:30:28,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17272 states. [2022-02-18 17:30:28,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17272 to 10560. [2022-02-18 17:30:28,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10560 states, 10559 states have (on average 2.4364049625911544) internal successors, (25726), 10559 states have internal predecessors, (25726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:30:28,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10560 states to 10560 states and 25726 transitions. [2022-02-18 17:30:28,915 INFO L78 Accepts]: Start accepts. Automaton has 10560 states and 25726 transitions. Word has length 31 [2022-02-18 17:30:28,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:30:28,915 INFO L470 AbstractCegarLoop]: Abstraction has 10560 states and 25726 transitions. [2022-02-18 17:30:28,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:30:28,915 INFO L276 IsEmpty]: Start isEmpty. Operand 10560 states and 25726 transitions. [2022-02-18 17:30:28,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 17:30:28,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:30:28,926 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:30:28,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-18 17:30:29,126 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,SelfDestructingSolverStorable36 [2022-02-18 17:30:29,126 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:30:29,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:30:29,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1685542175, now seen corresponding path program 36 times [2022-02-18 17:30:29,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:30:29,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163694844] [2022-02-18 17:30:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:30:29,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:30:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:30:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:29,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:30:29,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163694844] [2022-02-18 17:30:29,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163694844] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:30:29,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845072007] [2022-02-18 17:30:29,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:30:29,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:30:29,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:30:29,340 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:30:29,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-18 17:30:29,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-18 17:30:29,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:30:29,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-18 17:30:29,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:30:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:29,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:30:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:30,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845072007] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:30:30,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:30:30,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-02-18 17:30:30,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921323430] [2022-02-18 17:30:30,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:30:30,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-18 17:30:30,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:30:30,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-18 17:30:30,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=903, Unknown=0, NotChecked=0, Total=1190 [2022-02-18 17:30:30,013 INFO L87 Difference]: Start difference. First operand 10560 states and 25726 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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) [2022-02-18 17:30:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:30:31,153 INFO L93 Difference]: Finished difference Result 12545 states and 30331 transitions. [2022-02-18 17:30:31,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-18 17:30:31,154 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 31 [2022-02-18 17:30:31,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:30:31,174 INFO L225 Difference]: With dead ends: 12545 [2022-02-18 17:30:31,174 INFO L226 Difference]: Without dead ends: 12541 [2022-02-18 17:30:31,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1818, Invalid=4988, Unknown=0, NotChecked=0, Total=6806 [2022-02-18 17:30:31,179 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 291 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 17:30:31,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 186 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-18 17:30:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12541 states. [2022-02-18 17:30:31,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12541 to 11369. [2022-02-18 17:30:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11369 states, 11368 states have (on average 2.4481878958479943) internal successors, (27831), 11368 states have internal predecessors, (27831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:30:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11369 states to 11369 states and 27831 transitions. [2022-02-18 17:30:31,411 INFO L78 Accepts]: Start accepts. Automaton has 11369 states and 27831 transitions. Word has length 31 [2022-02-18 17:30:31,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:30:31,411 INFO L470 AbstractCegarLoop]: Abstraction has 11369 states and 27831 transitions. [2022-02-18 17:30:31,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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) [2022-02-18 17:30:31,411 INFO L276 IsEmpty]: Start isEmpty. Operand 11369 states and 27831 transitions. [2022-02-18 17:30:31,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-18 17:30:31,422 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:30:31,422 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:30:31,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-18 17:30:31,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:30:31,623 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:30:31,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:30:31,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1393248479, now seen corresponding path program 37 times [2022-02-18 17:30:31,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:30:31,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477786199] [2022-02-18 17:30:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:30:31,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:30:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:30:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:31,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:30:31,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477786199] [2022-02-18 17:30:31,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477786199] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:30:31,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877054442] [2022-02-18 17:30:31,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:30:31,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:30:31,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:30:31,730 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:30:31,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-18 17:30:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:30:31,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-18 17:30:31,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:30:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:32,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:30:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:32,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877054442] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:30:32,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:30:32,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-02-18 17:30:32,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937748638] [2022-02-18 17:30:32,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:30:32,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-18 17:30:32,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:30:32,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-18 17:30:32,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2022-02-18 17:30:32,554 INFO L87 Difference]: Start difference. First operand 11369 states and 27831 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:30:34,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:30:34,595 INFO L93 Difference]: Finished difference Result 12972 states and 30945 transitions. [2022-02-18 17:30:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-18 17:30:34,596 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:30:34,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:30:34,616 INFO L225 Difference]: With dead ends: 12972 [2022-02-18 17:30:34,617 INFO L226 Difference]: Without dead ends: 12972 [2022-02-18 17:30:34,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3545 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2658, Invalid=8898, Unknown=0, NotChecked=0, Total=11556 [2022-02-18 17:30:34,618 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 494 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 17:30:34,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 251 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-18 17:30:34,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12972 states. [2022-02-18 17:30:34,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12972 to 10915. [2022-02-18 17:30:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10915 states, 10914 states have (on average 2.455011911306579) internal successors, (26794), 10914 states have internal predecessors, (26794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:30:34,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10915 states to 10915 states and 26794 transitions. [2022-02-18 17:30:34,826 INFO L78 Accepts]: Start accepts. Automaton has 10915 states and 26794 transitions. Word has length 33 [2022-02-18 17:30:34,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:30:34,826 INFO L470 AbstractCegarLoop]: Abstraction has 10915 states and 26794 transitions. [2022-02-18 17:30:34,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:30:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 10915 states and 26794 transitions. [2022-02-18 17:30:34,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-18 17:30:34,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:30:34,837 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:30:34,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-02-18 17:30:35,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-18 17:30:35,045 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:30:35,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:30:35,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1039636493, now seen corresponding path program 38 times [2022-02-18 17:30:35,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:30:35,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614979588] [2022-02-18 17:30:35,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:30:35,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:30:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:30:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:35,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:30:35,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614979588] [2022-02-18 17:30:35,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614979588] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:30:35,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802203365] [2022-02-18 17:30:35,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:30:35,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:30:35,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:30:35,117 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:30:35,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-18 17:30:35,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:30:35,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:30:35,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-18 17:30:35,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:30:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:35,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:30:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:35,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802203365] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:30:35,716 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:30:35,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 31 [2022-02-18 17:30:35,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712851872] [2022-02-18 17:30:35,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:30:35,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-18 17:30:35,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:30:35,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-18 17:30:35,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2022-02-18 17:30:35,717 INFO L87 Difference]: Start difference. First operand 10915 states and 26794 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 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) [2022-02-18 17:30:37,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:30:37,317 INFO L93 Difference]: Finished difference Result 11524 states and 27953 transitions. [2022-02-18 17:30:37,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-18 17:30:37,317 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 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 33 [2022-02-18 17:30:37,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:30:37,334 INFO L225 Difference]: With dead ends: 11524 [2022-02-18 17:30:37,334 INFO L226 Difference]: Without dead ends: 11520 [2022-02-18 17:30:37,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3332 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2919, Invalid=7793, Unknown=0, NotChecked=0, Total=10712 [2022-02-18 17:30:37,335 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 322 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 17:30:37,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 102 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 17:30:37,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11520 states. [2022-02-18 17:30:37,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11520 to 10874. [2022-02-18 17:30:37,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10874 states, 10873 states have (on average 2.4531408075048287) internal successors, (26673), 10873 states have internal predecessors, (26673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:30:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10874 states to 10874 states and 26673 transitions. [2022-02-18 17:30:37,503 INFO L78 Accepts]: Start accepts. Automaton has 10874 states and 26673 transitions. Word has length 33 [2022-02-18 17:30:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:30:37,503 INFO L470 AbstractCegarLoop]: Abstraction has 10874 states and 26673 transitions. [2022-02-18 17:30:37,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 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) [2022-02-18 17:30:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 10874 states and 26673 transitions. [2022-02-18 17:30:37,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-18 17:30:37,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:30:37,514 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:30:37,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-18 17:30:37,735 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,SelfDestructingSolverStorable39 [2022-02-18 17:30:37,735 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:30:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:30:37,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2068346637, now seen corresponding path program 39 times [2022-02-18 17:30:37,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:30:37,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86926627] [2022-02-18 17:30:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:30:37,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:30:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:30:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:37,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:30:37,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86926627] [2022-02-18 17:30:37,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86926627] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:30:37,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844301683] [2022-02-18 17:30:37,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:30:37,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:30:37,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:30:37,959 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:30:37,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-18 17:30:37,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-18 17:30:37,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:30:37,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-18 17:30:37,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:30:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:38,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:30:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:39,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844301683] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:30:39,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:30:39,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 45 [2022-02-18 17:30:39,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380417283] [2022-02-18 17:30:39,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:30:39,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-18 17:30:39,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:30:39,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-18 17:30:39,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2022-02-18 17:30:39,334 INFO L87 Difference]: Start difference. First operand 10874 states and 26673 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:30:49,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:30:49,438 INFO L93 Difference]: Finished difference Result 14204 states and 34076 transitions. [2022-02-18 17:30:49,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-02-18 17:30:49,438 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:30:49,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:30:49,457 INFO L225 Difference]: With dead ends: 14204 [2022-02-18 17:30:49,457 INFO L226 Difference]: Without dead ends: 14039 [2022-02-18 17:30:49,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23795 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=6830, Invalid=56422, Unknown=0, NotChecked=0, Total=63252 [2022-02-18 17:30:49,460 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 940 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 3596 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 3596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-18 17:30:49,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 607 Invalid, 3957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 3596 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-18 17:30:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14039 states. [2022-02-18 17:30:49,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14039 to 12176. [2022-02-18 17:30:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12176 states, 12175 states have (on average 2.4552772073921973) internal successors, (29893), 12175 states have internal predecessors, (29893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:30:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12176 states to 12176 states and 29893 transitions. [2022-02-18 17:30:49,639 INFO L78 Accepts]: Start accepts. Automaton has 12176 states and 29893 transitions. Word has length 33 [2022-02-18 17:30:49,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:30:49,640 INFO L470 AbstractCegarLoop]: Abstraction has 12176 states and 29893 transitions. [2022-02-18 17:30:49,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:30:49,640 INFO L276 IsEmpty]: Start isEmpty. Operand 12176 states and 29893 transitions. [2022-02-18 17:30:49,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-18 17:30:49,651 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:30:49,651 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:30:49,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-18 17:30:49,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:30:49,852 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:30:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:30:49,852 INFO L85 PathProgramCache]: Analyzing trace with hash -226544083, now seen corresponding path program 40 times [2022-02-18 17:30:49,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:30:49,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567595369] [2022-02-18 17:30:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:30:49,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:30:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:30:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:50,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:30:50,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567595369] [2022-02-18 17:30:50,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567595369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:30:50,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986107336] [2022-02-18 17:30:50,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:30:50,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:30:50,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:30:50,196 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:30:50,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-18 17:30:50,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:30:50,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:30:50,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-18 17:30:50,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:30:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:51,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:30:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:30:52,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986107336] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:30:52,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:30:52,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 16] total 40 [2022-02-18 17:30:52,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605679900] [2022-02-18 17:30:52,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:30:52,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-18 17:30:52,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:30:52,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-18 17:30:52,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2022-02-18 17:30:52,518 INFO L87 Difference]: Start difference. First operand 12176 states and 29893 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:31:07,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:31:07,267 INFO L93 Difference]: Finished difference Result 18035 states and 43408 transitions. [2022-02-18 17:31:07,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-02-18 17:31:07,268 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:31:07,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:31:07,293 INFO L225 Difference]: With dead ends: 18035 [2022-02-18 17:31:07,293 INFO L226 Difference]: Without dead ends: 17960 [2022-02-18 17:31:07,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8150 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=4479, Invalid=18473, Unknown=0, NotChecked=0, Total=22952 [2022-02-18 17:31:07,295 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 653 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-18 17:31:07,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 333 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1770 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-18 17:31:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17960 states. [2022-02-18 17:31:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17960 to 13359. [2022-02-18 17:31:07,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13359 states, 13358 states have (on average 2.4353196586315318) internal successors, (32531), 13358 states have internal predecessors, (32531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:31:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13359 states to 13359 states and 32531 transitions. [2022-02-18 17:31:07,550 INFO L78 Accepts]: Start accepts. Automaton has 13359 states and 32531 transitions. Word has length 33 [2022-02-18 17:31:07,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:31:07,551 INFO L470 AbstractCegarLoop]: Abstraction has 13359 states and 32531 transitions. [2022-02-18 17:31:07,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:31:07,551 INFO L276 IsEmpty]: Start isEmpty. Operand 13359 states and 32531 transitions. [2022-02-18 17:31:07,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-18 17:31:07,562 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:31:07,563 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:31:07,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-18 17:31:07,763 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,SelfDestructingSolverStorable41 [2022-02-18 17:31:07,763 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:31:07,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:31:07,764 INFO L85 PathProgramCache]: Analyzing trace with hash -420701097, now seen corresponding path program 41 times [2022-02-18 17:31:07,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:31:07,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465031040] [2022-02-18 17:31:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:31:07,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:31:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:31:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 17:31:07,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:31:07,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465031040] [2022-02-18 17:31:07,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465031040] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:31:07,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785507636] [2022-02-18 17:31:07,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:31:07,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:31:07,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:31:07,867 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:31:07,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-18 17:31:07,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-02-18 17:31:07,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:31:07,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-18 17:31:07,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:31:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 17:31:08,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:31:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:31:09,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785507636] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:31:09,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:31:09,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 15] total 32 [2022-02-18 17:31:09,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398291146] [2022-02-18 17:31:09,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:31:09,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-18 17:31:09,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:31:09,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-18 17:31:09,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2022-02-18 17:31:09,153 INFO L87 Difference]: Start difference. First operand 13359 states and 32531 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:31:10,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:31:10,619 INFO L93 Difference]: Finished difference Result 14697 states and 35526 transitions. [2022-02-18 17:31:10,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-18 17:31:10,620 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 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 33 [2022-02-18 17:31:10,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:31:10,640 INFO L225 Difference]: With dead ends: 14697 [2022-02-18 17:31:10,641 INFO L226 Difference]: Without dead ends: 14691 [2022-02-18 17:31:10,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1713, Invalid=4929, Unknown=0, NotChecked=0, Total=6642 [2022-02-18 17:31:10,642 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 366 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 17:31:10,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 169 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-18 17:31:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14691 states. [2022-02-18 17:31:10,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14691 to 13470. [2022-02-18 17:31:10,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13470 states, 13469 states have (on average 2.432994283168758) internal successors, (32770), 13469 states have internal predecessors, (32770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:31:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13470 states to 13470 states and 32770 transitions. [2022-02-18 17:31:10,845 INFO L78 Accepts]: Start accepts. Automaton has 13470 states and 32770 transitions. Word has length 33 [2022-02-18 17:31:10,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:31:10,845 INFO L470 AbstractCegarLoop]: Abstraction has 13470 states and 32770 transitions. [2022-02-18 17:31:10,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:31:10,845 INFO L276 IsEmpty]: Start isEmpty. Operand 13470 states and 32770 transitions. [2022-02-18 17:31:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-18 17:31:10,860 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:31:10,860 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:31:10,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-18 17:31:11,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:31:11,061 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:31:11,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:31:11,061 INFO L85 PathProgramCache]: Analyzing trace with hash -971038451, now seen corresponding path program 42 times [2022-02-18 17:31:11,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:31:11,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339014347] [2022-02-18 17:31:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:31:11,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:31:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:31:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:31:11,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:31:11,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339014347] [2022-02-18 17:31:11,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339014347] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:31:11,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128875509] [2022-02-18 17:31:11,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:31:11,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:31:11,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:31:11,356 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:31:11,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-18 17:31:11,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-18 17:31:11,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:31:11,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 17:31:11,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:31:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:31:12,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:31:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:31:12,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128875509] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:31:12,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:31:12,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-02-18 17:31:12,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278168321] [2022-02-18 17:31:12,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:31:12,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-18 17:31:12,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:31:12,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-18 17:31:12,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1661, Unknown=0, NotChecked=0, Total=2070 [2022-02-18 17:31:12,749 INFO L87 Difference]: Start difference. First operand 13470 states and 32770 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:31:26,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:31:26,081 INFO L93 Difference]: Finished difference Result 19054 states and 45384 transitions. [2022-02-18 17:31:26,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-02-18 17:31:26,081 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-18 17:31:26,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:31:26,108 INFO L225 Difference]: With dead ends: 19054 [2022-02-18 17:31:26,108 INFO L226 Difference]: Without dead ends: 19045 [2022-02-18 17:31:26,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23019 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=8705, Invalid=45817, Unknown=0, NotChecked=0, Total=54522 [2022-02-18 17:31:26,110 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1186 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 652 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-18 17:31:26,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1186 Valid, 411 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1987 Invalid, 0 Unknown, 652 Unchecked, 1.0s Time] [2022-02-18 17:31:26,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19045 states. [2022-02-18 17:31:26,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19045 to 13793. [2022-02-18 17:31:26,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13793 states, 13792 states have (on average 2.4365574245939676) internal successors, (33605), 13792 states have internal predecessors, (33605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:31:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13793 states to 13793 states and 33605 transitions. [2022-02-18 17:31:26,360 INFO L78 Accepts]: Start accepts. Automaton has 13793 states and 33605 transitions. Word has length 35 [2022-02-18 17:31:26,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:31:26,360 INFO L470 AbstractCegarLoop]: Abstraction has 13793 states and 33605 transitions. [2022-02-18 17:31:26,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:31:26,360 INFO L276 IsEmpty]: Start isEmpty. Operand 13793 states and 33605 transitions. [2022-02-18 17:31:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-18 17:31:26,376 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:31:26,376 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:31:26,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-18 17:31:26,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:31:26,578 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:31:26,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:31:26,579 INFO L85 PathProgramCache]: Analyzing trace with hash 255734751, now seen corresponding path program 43 times [2022-02-18 17:31:26,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:31:26,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858196762] [2022-02-18 17:31:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:31:26,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:31:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:31:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:31:26,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:31:26,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858196762] [2022-02-18 17:31:26,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858196762] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:31:26,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475744272] [2022-02-18 17:31:26,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:31:26,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:31:26,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:31:26,820 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:31:26,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-18 17:31:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:31:26,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 17:31:26,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:31:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:31:27,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:31:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:31:29,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475744272] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:31:29,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:31:29,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-02-18 17:31:29,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414205277] [2022-02-18 17:31:29,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:31:29,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-18 17:31:29,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:31:29,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-18 17:31:29,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1766, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 17:31:29,529 INFO L87 Difference]: Start difference. First operand 13793 states and 33605 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:32:07,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:32:07,962 INFO L93 Difference]: Finished difference Result 20048 states and 47741 transitions. [2022-02-18 17:32:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2022-02-18 17:32:07,963 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-18 17:32:07,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:32:07,994 INFO L225 Difference]: With dead ends: 20048 [2022-02-18 17:32:07,994 INFO L226 Difference]: Without dead ends: 20011 [2022-02-18 17:32:07,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 27278 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=10703, Invalid=52549, Unknown=0, NotChecked=0, Total=63252 [2022-02-18 17:32:07,997 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1342 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 2438 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 2438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-18 17:32:07,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1342 Valid, 541 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 2438 Invalid, 0 Unknown, 379 Unchecked, 1.4s Time] [2022-02-18 17:32:08,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20011 states. [2022-02-18 17:32:08,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20011 to 14278. [2022-02-18 17:32:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14278 states, 14277 states have (on average 2.436856482454297) internal successors, (34791), 14277 states have internal predecessors, (34791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:32:08,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14278 states to 14278 states and 34791 transitions. [2022-02-18 17:32:08,276 INFO L78 Accepts]: Start accepts. Automaton has 14278 states and 34791 transitions. Word has length 35 [2022-02-18 17:32:08,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:32:08,276 INFO L470 AbstractCegarLoop]: Abstraction has 14278 states and 34791 transitions. [2022-02-18 17:32:08,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:32:08,276 INFO L276 IsEmpty]: Start isEmpty. Operand 14278 states and 34791 transitions. [2022-02-18 17:32:08,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-18 17:32:08,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:32:08,295 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:32:08,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-02-18 17:32:08,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-02-18 17:32:08,504 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:32:08,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:32:08,505 INFO L85 PathProgramCache]: Analyzing trace with hash 975083881, now seen corresponding path program 44 times [2022-02-18 17:32:08,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:32:08,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403777899] [2022-02-18 17:32:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:32:08,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:32:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:32:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:32:08,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:32:08,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403777899] [2022-02-18 17:32:08,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403777899] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:32:08,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388271820] [2022-02-18 17:32:08,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:32:08,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:32:08,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:32:08,759 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:32:08,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-18 17:32:08,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:32:08,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:32:08,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 17:32:08,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:32:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:32:09,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:32:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:32:11,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388271820] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:32:11,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:32:11,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-02-18 17:32:11,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788544615] [2022-02-18 17:32:11,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:32:11,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-18 17:32:11,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:32:11,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-18 17:32:11,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1789, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 17:32:11,605 INFO L87 Difference]: Start difference. First operand 14278 states and 34791 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:32:46,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:32:46,256 INFO L93 Difference]: Finished difference Result 21356 states and 50836 transitions. [2022-02-18 17:32:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-02-18 17:32:46,257 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-18 17:32:46,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:32:46,292 INFO L225 Difference]: With dead ends: 21356 [2022-02-18 17:32:46,292 INFO L226 Difference]: Without dead ends: 21320 [2022-02-18 17:32:46,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 49 SyntacticMatches, 38 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 27665 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=9930, Invalid=46476, Unknown=0, NotChecked=0, Total=56406 [2022-02-18 17:32:46,295 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1379 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 3311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-18 17:32:46,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1379 Valid, 490 Invalid, 3311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 2450 Invalid, 0 Unknown, 449 Unchecked, 1.4s Time] [2022-02-18 17:32:46,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21320 states. [2022-02-18 17:32:46,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21320 to 14773. [2022-02-18 17:32:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14773 states, 14772 states have (on average 2.437855402112104) internal successors, (36012), 14772 states have internal predecessors, (36012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:32:46,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14773 states to 14773 states and 36012 transitions. [2022-02-18 17:32:46,607 INFO L78 Accepts]: Start accepts. Automaton has 14773 states and 36012 transitions. Word has length 35 [2022-02-18 17:32:46,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:32:46,607 INFO L470 AbstractCegarLoop]: Abstraction has 14773 states and 36012 transitions. [2022-02-18 17:32:46,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:32:46,607 INFO L276 IsEmpty]: Start isEmpty. Operand 14773 states and 36012 transitions. [2022-02-18 17:32:46,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-18 17:32:46,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:32:46,626 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:32:46,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-18 17:32:46,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-18 17:32:46,827 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:32:46,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:32:46,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1746633437, now seen corresponding path program 45 times [2022-02-18 17:32:46,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:32:46,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980672998] [2022-02-18 17:32:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:32:46,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:32:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:32:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:32:47,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:32:47,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980672998] [2022-02-18 17:32:47,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980672998] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:32:47,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524821937] [2022-02-18 17:32:47,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:32:47,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:32:47,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:32:47,039 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:32:47,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-18 17:32:47,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-18 17:32:47,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:32:47,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-18 17:32:47,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:32:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:32:47,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:32:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:32:47,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524821937] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:32:47,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:32:47,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-02-18 17:32:47,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868629649] [2022-02-18 17:32:47,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:32:47,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-18 17:32:47,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:32:47,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-18 17:32:47,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2022-02-18 17:32:47,556 INFO L87 Difference]: Start difference. First operand 14773 states and 36012 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:32:50,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:32:50,635 INFO L93 Difference]: Finished difference Result 24704 states and 59667 transitions. [2022-02-18 17:32:50,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-18 17:32:50,636 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:32:50,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:32:50,679 INFO L225 Difference]: With dead ends: 24704 [2022-02-18 17:32:50,679 INFO L226 Difference]: Without dead ends: 24291 [2022-02-18 17:32:50,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5937 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2825, Invalid=14467, Unknown=0, NotChecked=0, Total=17292 [2022-02-18 17:32:50,680 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 724 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-18 17:32:50,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 264 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-18 17:32:50,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24291 states. [2022-02-18 17:32:51,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24291 to 18100. [2022-02-18 17:32:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18100 states, 18099 states have (on average 2.420188960716062) internal successors, (43803), 18099 states have internal predecessors, (43803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:32:51,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18100 states to 18100 states and 43803 transitions. [2022-02-18 17:32:51,100 INFO L78 Accepts]: Start accepts. Automaton has 18100 states and 43803 transitions. Word has length 35 [2022-02-18 17:32:51,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:32:51,100 INFO L470 AbstractCegarLoop]: Abstraction has 18100 states and 43803 transitions. [2022-02-18 17:32:51,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:32:51,100 INFO L276 IsEmpty]: Start isEmpty. Operand 18100 states and 43803 transitions. [2022-02-18 17:32:51,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-18 17:32:51,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:32:51,119 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:32:51,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-18 17:32:51,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-18 17:32:51,335 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:32:51,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:32:51,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1003263075, now seen corresponding path program 46 times [2022-02-18 17:32:51,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:32:51,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388224827] [2022-02-18 17:32:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:32:51,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:32:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:32:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:32:51,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:32:51,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388224827] [2022-02-18 17:32:51,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388224827] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:32:51,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637551909] [2022-02-18 17:32:51,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:32:51,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:32:51,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:32:51,634 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:32:51,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-18 17:32:51,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:32:51,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:32:51,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 17:32:51,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:32:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:32:52,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:32:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:32:53,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637551909] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:32:53,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:32:53,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-02-18 17:32:53,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047452604] [2022-02-18 17:32:53,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:32:53,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-18 17:32:53,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:32:53,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-18 17:32:53,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1699, Unknown=0, NotChecked=0, Total=2070 [2022-02-18 17:32:53,235 INFO L87 Difference]: Start difference. First operand 18100 states and 43803 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:33:11,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:33:11,863 INFO L93 Difference]: Finished difference Result 27518 states and 64706 transitions. [2022-02-18 17:33:11,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-02-18 17:33:11,864 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-18 17:33:11,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:33:11,917 INFO L225 Difference]: With dead ends: 27518 [2022-02-18 17:33:11,917 INFO L226 Difference]: Without dead ends: 27191 [2022-02-18 17:33:11,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 50 SyntacticMatches, 21 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41306 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=13048, Invalid=77252, Unknown=0, NotChecked=0, Total=90300 [2022-02-18 17:33:11,921 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1031 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 2858 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 3887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 565 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-18 17:33:11,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1031 Valid, 514 Invalid, 3887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2858 Invalid, 0 Unknown, 565 Unchecked, 1.5s Time] [2022-02-18 17:33:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27191 states. [2022-02-18 17:33:12,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27191 to 18718. [2022-02-18 17:33:12,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18718 states, 18717 states have (on average 2.421702195864722) internal successors, (45327), 18717 states have internal predecessors, (45327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:33:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18718 states to 18718 states and 45327 transitions. [2022-02-18 17:33:12,316 INFO L78 Accepts]: Start accepts. Automaton has 18718 states and 45327 transitions. Word has length 35 [2022-02-18 17:33:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:33:12,316 INFO L470 AbstractCegarLoop]: Abstraction has 18718 states and 45327 transitions. [2022-02-18 17:33:12,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:33:12,316 INFO L276 IsEmpty]: Start isEmpty. Operand 18718 states and 45327 transitions. [2022-02-18 17:33:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-18 17:33:12,336 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:33:12,336 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:33:12,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-18 17:33:12,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:33:12,536 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:33:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:33:12,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1962410595, now seen corresponding path program 47 times [2022-02-18 17:33:12,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:33:12,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434081453] [2022-02-18 17:33:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:33:12,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:33:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:33:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:33:12,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:33:12,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434081453] [2022-02-18 17:33:12,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434081453] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:33:12,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557925900] [2022-02-18 17:33:12,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:33:12,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:33:12,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:33:12,805 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:33:12,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-18 17:33:12,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-18 17:33:12,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:33:12,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 17:33:12,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:33:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:33:13,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:33:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:33:14,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557925900] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:33:14,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:33:14,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-02-18 17:33:14,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556065039] [2022-02-18 17:33:14,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:33:14,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-18 17:33:14,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:33:14,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-18 17:33:14,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2022-02-18 17:33:14,374 INFO L87 Difference]: Start difference. First operand 18718 states and 45327 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:33:28,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:33:28,259 INFO L93 Difference]: Finished difference Result 27149 states and 64467 transitions. [2022-02-18 17:33:28,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-02-18 17:33:28,259 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-18 17:33:28,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:33:28,307 INFO L225 Difference]: With dead ends: 27149 [2022-02-18 17:33:28,307 INFO L226 Difference]: Without dead ends: 26998 [2022-02-18 17:33:28,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 50 SyntacticMatches, 27 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27364 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=9504, Invalid=48818, Unknown=0, NotChecked=0, Total=58322 [2022-02-18 17:33:28,309 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 841 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 2224 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 3393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 2224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 808 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:33:28,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 396 Invalid, 3393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 2224 Invalid, 0 Unknown, 808 Unchecked, 1.2s Time] [2022-02-18 17:33:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26998 states. [2022-02-18 17:33:28,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26998 to 19461. [2022-02-18 17:33:28,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19461 states, 19460 states have (on average 2.4192702980472767) internal successors, (47079), 19460 states have internal predecessors, (47079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:33:28,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19461 states to 19461 states and 47079 transitions. [2022-02-18 17:33:28,682 INFO L78 Accepts]: Start accepts. Automaton has 19461 states and 47079 transitions. Word has length 35 [2022-02-18 17:33:28,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:33:28,682 INFO L470 AbstractCegarLoop]: Abstraction has 19461 states and 47079 transitions. [2022-02-18 17:33:28,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:33:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 19461 states and 47079 transitions. [2022-02-18 17:33:28,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-18 17:33:28,701 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:33:28,702 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:33:28,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-18 17:33:28,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-18 17:33:28,902 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:33:28,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:33:28,902 INFO L85 PathProgramCache]: Analyzing trace with hash 893229107, now seen corresponding path program 48 times [2022-02-18 17:33:28,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:33:28,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268026492] [2022-02-18 17:33:28,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:33:28,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:33:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:33:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:33:29,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:33:29,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268026492] [2022-02-18 17:33:29,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268026492] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:33:29,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639101798] [2022-02-18 17:33:29,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:33:29,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:33:29,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:33:29,177 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:33:29,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-18 17:33:29,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-18 17:33:29,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:33:29,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 17:33:29,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:33:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:33:30,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:33:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:33:31,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639101798] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:33:31,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:33:31,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-02-18 17:33:31,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11477897] [2022-02-18 17:33:31,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:33:31,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-18 17:33:31,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:33:31,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-18 17:33:31,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 17:33:31,934 INFO L87 Difference]: Start difference. First operand 19461 states and 47079 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:34:11,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:34:11,718 INFO L93 Difference]: Finished difference Result 42567 states and 102196 transitions. [2022-02-18 17:34:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2022-02-18 17:34:11,718 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-18 17:34:11,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:34:11,795 INFO L225 Difference]: With dead ends: 42567 [2022-02-18 17:34:11,795 INFO L226 Difference]: Without dead ends: 42462 [2022-02-18 17:34:11,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 35066 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=12667, Invalid=68843, Unknown=0, NotChecked=0, Total=81510 [2022-02-18 17:34:11,798 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 969 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 3326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 696 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-18 17:34:11,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 459 Invalid, 3326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 2170 Invalid, 0 Unknown, 696 Unchecked, 1.3s Time] [2022-02-18 17:34:11,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42462 states. [2022-02-18 17:34:12,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42462 to 20181. [2022-02-18 17:34:12,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20181 states, 20180 states have (on average 2.415312190287413) internal successors, (48741), 20180 states have internal predecessors, (48741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:34:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20181 states to 20181 states and 48741 transitions. [2022-02-18 17:34:12,346 INFO L78 Accepts]: Start accepts. Automaton has 20181 states and 48741 transitions. Word has length 35 [2022-02-18 17:34:12,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:34:12,347 INFO L470 AbstractCegarLoop]: Abstraction has 20181 states and 48741 transitions. [2022-02-18 17:34:12,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:34:12,347 INFO L276 IsEmpty]: Start isEmpty. Operand 20181 states and 48741 transitions. [2022-02-18 17:34:12,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-18 17:34:12,368 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:34:12,368 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:34:12,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-18 17:34:12,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-18 17:34:12,568 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:34:12,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:34:12,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1057414301, now seen corresponding path program 49 times [2022-02-18 17:34:12,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:34:12,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038251966] [2022-02-18 17:34:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:34:12,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:34:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:34:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:34:12,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:34:12,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038251966] [2022-02-18 17:34:12,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038251966] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:34:12,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403681988] [2022-02-18 17:34:12,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:34:12,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:34:12,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:34:12,821 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:34:12,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-18 17:34:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:34:12,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 17:34:12,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:34:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:34:13,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:34:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:34:14,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403681988] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:34:14,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:34:14,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-02-18 17:34:14,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868614639] [2022-02-18 17:34:14,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:34:14,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-18 17:34:14,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:34:14,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-18 17:34:14,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2022-02-18 17:34:14,407 INFO L87 Difference]: Start difference. First operand 20181 states and 48741 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:34:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:34:29,559 INFO L93 Difference]: Finished difference Result 31595 states and 75036 transitions. [2022-02-18 17:34:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2022-02-18 17:34:29,559 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-18 17:34:29,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:34:29,628 INFO L225 Difference]: With dead ends: 31595 [2022-02-18 17:34:29,628 INFO L226 Difference]: Without dead ends: 31391 [2022-02-18 17:34:29,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 58 SyntacticMatches, 14 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30424 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=10357, Invalid=57503, Unknown=0, NotChecked=0, Total=67860 [2022-02-18 17:34:29,633 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 948 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 3485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-18 17:34:29,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [948 Valid, 634 Invalid, 3485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 2598 Invalid, 0 Unknown, 528 Unchecked, 1.4s Time] [2022-02-18 17:34:29,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31391 states. [2022-02-18 17:34:30,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31391 to 20619. [2022-02-18 17:34:30,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20619 states, 20618 states have (on average 2.412212629741003) internal successors, (49735), 20618 states have internal predecessors, (49735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:34:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20619 states to 20619 states and 49735 transitions. [2022-02-18 17:34:30,110 INFO L78 Accepts]: Start accepts. Automaton has 20619 states and 49735 transitions. Word has length 35 [2022-02-18 17:34:30,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:34:30,110 INFO L470 AbstractCegarLoop]: Abstraction has 20619 states and 49735 transitions. [2022-02-18 17:34:30,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:34:30,110 INFO L276 IsEmpty]: Start isEmpty. Operand 20619 states and 49735 transitions. [2022-02-18 17:34:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-18 17:34:30,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:34:30,133 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:34:30,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-18 17:34:30,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:34:30,333 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:34:30,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:34:30,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1794931811, now seen corresponding path program 50 times [2022-02-18 17:34:30,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:34:30,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117071978] [2022-02-18 17:34:30,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:34:30,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:34:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:34:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:34:30,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:34:30,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117071978] [2022-02-18 17:34:30,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117071978] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:34:30,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511418499] [2022-02-18 17:34:30,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:34:30,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:34:30,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:34:30,572 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:34:30,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-18 17:34:30,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:34:30,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:34:30,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-18 17:34:30,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:34:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:34:31,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:34:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:34:32,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511418499] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:34:32,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:34:32,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17] total 41 [2022-02-18 17:34:32,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676786588] [2022-02-18 17:34:32,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:34:32,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-18 17:34:32,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:34:32,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-18 17:34:32,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1377, Unknown=0, NotChecked=0, Total=1722 [2022-02-18 17:34:32,371 INFO L87 Difference]: Start difference. First operand 20619 states and 49735 transitions. Second operand has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:34:39,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:34:39,801 INFO L93 Difference]: Finished difference Result 31800 states and 75366 transitions. [2022-02-18 17:34:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-18 17:34:39,802 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:34:39,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:34:39,864 INFO L225 Difference]: With dead ends: 31800 [2022-02-18 17:34:39,864 INFO L226 Difference]: Without dead ends: 31773 [2022-02-18 17:34:39,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8298 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4887, Invalid=17165, Unknown=0, NotChecked=0, Total=22052 [2022-02-18 17:34:39,865 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 700 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1828 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-18 17:34:39,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 328 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1828 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-18 17:34:39,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31773 states. [2022-02-18 17:34:40,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31773 to 24756. [2022-02-18 17:34:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24756 states, 24755 states have (on average 2.4244395071702685) internal successors, (60017), 24755 states have internal predecessors, (60017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:34:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24756 states to 24756 states and 60017 transitions. [2022-02-18 17:34:40,425 INFO L78 Accepts]: Start accepts. Automaton has 24756 states and 60017 transitions. Word has length 35 [2022-02-18 17:34:40,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:34:40,425 INFO L470 AbstractCegarLoop]: Abstraction has 24756 states and 60017 transitions. [2022-02-18 17:34:40,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:34:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 24756 states and 60017 transitions. [2022-02-18 17:34:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-18 17:34:40,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:34:40,450 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:34:40,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-18 17:34:40,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-18 17:34:40,655 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:34:40,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:34:40,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1064565901, now seen corresponding path program 51 times [2022-02-18 17:34:40,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:34:40,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363578771] [2022-02-18 17:34:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:34:40,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:34:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:34:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:34:40,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:34:40,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363578771] [2022-02-18 17:34:40,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363578771] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:34:40,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149220628] [2022-02-18 17:34:40,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:34:40,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:34:40,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:34:40,832 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:34:40,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-18 17:34:40,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-18 17:34:40,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:34:40,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-18 17:34:40,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:34:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:34:41,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:34:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:34:42,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149220628] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:34:42,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:34:42,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 39 [2022-02-18 17:34:42,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937496770] [2022-02-18 17:34:42,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:34:42,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-18 17:34:42,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:34:42,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-18 17:34:42,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1189, Unknown=0, NotChecked=0, Total=1560 [2022-02-18 17:34:42,551 INFO L87 Difference]: Start difference. First operand 24756 states and 60017 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:34:46,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:34:46,045 INFO L93 Difference]: Finished difference Result 33437 states and 81132 transitions. [2022-02-18 17:34:46,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-18 17:34:46,046 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:34:46,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:34:46,110 INFO L225 Difference]: With dead ends: 33437 [2022-02-18 17:34:46,110 INFO L226 Difference]: Without dead ends: 33429 [2022-02-18 17:34:46,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3962 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3179, Invalid=8811, Unknown=0, NotChecked=0, Total=11990 [2022-02-18 17:34:46,112 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 370 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 17:34:46,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 178 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 17:34:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33429 states. [2022-02-18 17:34:46,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33429 to 28374. [2022-02-18 17:34:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28374 states, 28373 states have (on average 2.445775913720791) internal successors, (69394), 28373 states have internal predecessors, (69394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:34:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28374 states to 28374 states and 69394 transitions. [2022-02-18 17:34:46,673 INFO L78 Accepts]: Start accepts. Automaton has 28374 states and 69394 transitions. Word has length 35 [2022-02-18 17:34:46,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:34:46,674 INFO L470 AbstractCegarLoop]: Abstraction has 28374 states and 69394 transitions. [2022-02-18 17:34:46,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:34:46,674 INFO L276 IsEmpty]: Start isEmpty. Operand 28374 states and 69394 transitions. [2022-02-18 17:34:46,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-18 17:34:46,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:34:46,699 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:34:46,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-18 17:34:46,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:34:46,900 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:34:46,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:34:46,901 INFO L85 PathProgramCache]: Analyzing trace with hash -968336091, now seen corresponding path program 52 times [2022-02-18 17:34:46,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:34:46,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633918820] [2022-02-18 17:34:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:34:46,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:34:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:34:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:34:47,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:34:47,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633918820] [2022-02-18 17:34:47,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633918820] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:34:47,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066217385] [2022-02-18 17:34:47,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:34:47,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:34:47,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:34:47,150 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:34:47,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-18 17:34:47,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:34:47,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:34:47,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 17:34:47,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:34:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:34:48,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:34:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:34:50,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066217385] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:34:50,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:34:50,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 46 [2022-02-18 17:34:50,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101971433] [2022-02-18 17:34:50,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:34:50,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-18 17:34:50,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:34:50,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-18 17:34:50,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1683, Unknown=0, NotChecked=0, Total=2070 [2022-02-18 17:34:50,072 INFO L87 Difference]: Start difference. First operand 28374 states and 69394 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:35:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:35:56,704 INFO L93 Difference]: Finished difference Result 76564 states and 186438 transitions. [2022-02-18 17:35:56,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 380 states. [2022-02-18 17:35:56,704 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-18 17:35:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:35:56,903 INFO L225 Difference]: With dead ends: 76564 [2022-02-18 17:35:56,903 INFO L226 Difference]: Without dead ends: 76431 [2022-02-18 17:35:56,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 78772 ImplicationChecksByTransitivity, 65.0s TimeCoverageRelationStatistics Valid=24736, Invalid=142954, Unknown=0, NotChecked=0, Total=167690 [2022-02-18 17:35:56,910 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1220 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 3390 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 5025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 3390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1108 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-18 17:35:56,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 864 Invalid, 5025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 3390 Invalid, 0 Unknown, 1108 Unchecked, 2.0s Time] [2022-02-18 17:35:56,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76431 states. [2022-02-18 17:35:58,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76431 to 35789. [2022-02-18 17:35:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35789 states, 35788 states have (on average 2.447831675421929) internal successors, (87603), 35788 states have internal predecessors, (87603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:35:58,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35789 states to 35789 states and 87603 transitions. [2022-02-18 17:35:58,253 INFO L78 Accepts]: Start accepts. Automaton has 35789 states and 87603 transitions. Word has length 35 [2022-02-18 17:35:58,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:35:58,253 INFO L470 AbstractCegarLoop]: Abstraction has 35789 states and 87603 transitions. [2022-02-18 17:35:58,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:35:58,253 INFO L276 IsEmpty]: Start isEmpty. Operand 35789 states and 87603 transitions. [2022-02-18 17:35:58,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-18 17:35:58,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:35:58,282 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:35:58,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-02-18 17:35:58,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-02-18 17:35:58,483 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:35:58,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:35:58,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1472113377, now seen corresponding path program 53 times [2022-02-18 17:35:58,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:35:58,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470868062] [2022-02-18 17:35:58,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:35:58,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:35:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:35:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:35:58,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:35:58,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470868062] [2022-02-18 17:35:58,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470868062] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:35:58,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575660772] [2022-02-18 17:35:58,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:35:58,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:35:58,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:35:58,738 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:35:58,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-18 17:35:58,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-18 17:35:58,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:35:58,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-18 17:35:58,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:35:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:35:59,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:36:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:36:00,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575660772] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:36:00,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:36:00,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 39 [2022-02-18 17:36:00,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852489586] [2022-02-18 17:36:00,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:36:00,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-18 17:36:00,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:36:00,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-18 17:36:00,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2022-02-18 17:36:00,135 INFO L87 Difference]: Start difference. First operand 35789 states and 87603 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:36:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:36:12,993 INFO L93 Difference]: Finished difference Result 51166 states and 123889 transitions. [2022-02-18 17:36:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-02-18 17:36:12,993 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:36:12,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:36:13,130 INFO L225 Difference]: With dead ends: 51166 [2022-02-18 17:36:13,130 INFO L226 Difference]: Without dead ends: 50956 [2022-02-18 17:36:13,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16625 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=5587, Invalid=37885, Unknown=0, NotChecked=0, Total=43472 [2022-02-18 17:36:13,133 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1183 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 2724 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 3245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 2724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-18 17:36:13,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1183 Valid, 567 Invalid, 3245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 2724 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-18 17:36:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50956 states. [2022-02-18 17:36:13,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50956 to 37796. [2022-02-18 17:36:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37796 states, 37795 states have (on average 2.4284164572033338) internal successors, (91782), 37795 states have internal predecessors, (91782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:36:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37796 states to 37796 states and 91782 transitions. [2022-02-18 17:36:14,083 INFO L78 Accepts]: Start accepts. Automaton has 37796 states and 91782 transitions. Word has length 35 [2022-02-18 17:36:14,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:36:14,083 INFO L470 AbstractCegarLoop]: Abstraction has 37796 states and 91782 transitions. [2022-02-18 17:36:14,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:36:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 37796 states and 91782 transitions. [2022-02-18 17:36:14,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-18 17:36:14,114 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:36:14,114 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:36:14,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-18 17:36:14,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-18 17:36:14,314 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:36:14,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:36:14,315 INFO L85 PathProgramCache]: Analyzing trace with hash 309882039, now seen corresponding path program 54 times [2022-02-18 17:36:14,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:36:14,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434687247] [2022-02-18 17:36:14,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:36:14,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:36:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:36:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:36:14,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:36:14,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434687247] [2022-02-18 17:36:14,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434687247] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:36:14,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668481514] [2022-02-18 17:36:14,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:36:14,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:36:14,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:36:14,600 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:36:14,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-18 17:36:14,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-18 17:36:14,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:36:14,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 17:36:14,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:36:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:36:15,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:36:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:36:17,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668481514] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:36:17,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:36:17,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-02-18 17:36:17,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63892249] [2022-02-18 17:36:17,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:36:17,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-18 17:36:17,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:36:17,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-18 17:36:17,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1806, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 17:36:17,550 INFO L87 Difference]: Start difference. First operand 37796 states and 91782 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:37:15,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:37:15,671 INFO L93 Difference]: Finished difference Result 64315 states and 154824 transitions. [2022-02-18 17:37:15,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 392 states. [2022-02-18 17:37:15,672 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-18 17:37:15,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:37:15,831 INFO L225 Difference]: With dead ends: 64315 [2022-02-18 17:37:15,831 INFO L226 Difference]: Without dead ends: 64110 [2022-02-18 17:37:15,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 432 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 88058 ImplicationChecksByTransitivity, 56.4s TimeCoverageRelationStatistics Valid=25719, Invalid=162203, Unknown=0, NotChecked=0, Total=187922 [2022-02-18 17:37:15,838 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1339 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 3555 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 4669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 3555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 491 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:37:15,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1339 Valid, 896 Invalid, 4669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 3555 Invalid, 0 Unknown, 491 Unchecked, 2.2s Time] [2022-02-18 17:37:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64110 states. [2022-02-18 17:37:16,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64110 to 42957. [2022-02-18 17:37:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42957 states, 42956 states have (on average 2.432582177111463) internal successors, (104494), 42956 states have internal predecessors, (104494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:37:17,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42957 states to 42957 states and 104494 transitions. [2022-02-18 17:37:17,005 INFO L78 Accepts]: Start accepts. Automaton has 42957 states and 104494 transitions. Word has length 35 [2022-02-18 17:37:17,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:37:17,005 INFO L470 AbstractCegarLoop]: Abstraction has 42957 states and 104494 transitions. [2022-02-18 17:37:17,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:37:17,006 INFO L276 IsEmpty]: Start isEmpty. Operand 42957 states and 104494 transitions. [2022-02-18 17:37:17,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-18 17:37:17,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:37:17,041 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:37:17,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-18 17:37:17,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:37:17,241 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:37:17,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:37:17,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1619435289, now seen corresponding path program 55 times [2022-02-18 17:37:17,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:37:17,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791594550] [2022-02-18 17:37:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:37:17,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:37:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:37:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 17:37:17,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:37:17,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791594550] [2022-02-18 17:37:17,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791594550] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:37:17,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653879482] [2022-02-18 17:37:17,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:37:17,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:37:17,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:37:17,529 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:37:17,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-18 17:37:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:37:17,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 17:37:17,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:37:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:37:18,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:37:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:37:19,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653879482] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:37:19,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:37:19,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-02-18 17:37:19,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504927919] [2022-02-18 17:37:19,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:37:19,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-18 17:37:19,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:37:19,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-18 17:37:19,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1536, Unknown=0, NotChecked=0, Total=1892 [2022-02-18 17:37:19,112 INFO L87 Difference]: Start difference. First operand 42957 states and 104494 transitions. Second operand has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:37:34,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:37:34,104 INFO L93 Difference]: Finished difference Result 64001 states and 154506 transitions. [2022-02-18 17:37:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2022-02-18 17:37:34,104 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-18 17:37:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:37:34,273 INFO L225 Difference]: With dead ends: 64001 [2022-02-18 17:37:34,274 INFO L226 Difference]: Without dead ends: 63813 [2022-02-18 17:37:34,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 55 SyntacticMatches, 13 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29257 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=10278, Invalid=57062, Unknown=0, NotChecked=0, Total=67340 [2022-02-18 17:37:34,278 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 710 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 3588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 750 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:37:34,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 473 Invalid, 3588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 2564 Invalid, 0 Unknown, 750 Unchecked, 1.2s Time] [2022-02-18 17:37:34,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63813 states. [2022-02-18 17:37:35,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63813 to 43034. [2022-02-18 17:37:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43034 states, 43033 states have (on average 2.4317849092556876) internal successors, (104647), 43033 states have internal predecessors, (104647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:37:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43034 states to 43034 states and 104647 transitions. [2022-02-18 17:37:35,498 INFO L78 Accepts]: Start accepts. Automaton has 43034 states and 104647 transitions. Word has length 35 [2022-02-18 17:37:35,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:37:35,498 INFO L470 AbstractCegarLoop]: Abstraction has 43034 states and 104647 transitions. [2022-02-18 17:37:35,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:37:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 43034 states and 104647 transitions. [2022-02-18 17:37:35,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-18 17:37:35,537 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:37:35,537 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:37:35,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-18 17:37:35,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:37:35,738 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:37:35,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:37:35,738 INFO L85 PathProgramCache]: Analyzing trace with hash 830358429, now seen corresponding path program 56 times [2022-02-18 17:37:35,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:37:35,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633413846] [2022-02-18 17:37:35,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:37:35,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:37:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:37:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 17:37:35,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:37:35,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633413846] [2022-02-18 17:37:35,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633413846] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:37:35,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984394396] [2022-02-18 17:37:35,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:37:35,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:37:35,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:37:35,987 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:37:35,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-18 17:37:36,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:37:36,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:37:36,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 17:37:36,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:37:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:37:36,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:37:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:37:37,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984394396] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:37:37,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:37:37,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 44 [2022-02-18 17:37:37,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071751572] [2022-02-18 17:37:37,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:37:37,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-18 17:37:37,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:37:37,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-18 17:37:37,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1540, Unknown=0, NotChecked=0, Total=1892 [2022-02-18 17:37:37,511 INFO L87 Difference]: Start difference. First operand 43034 states and 104647 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:37:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:37:55,473 INFO L93 Difference]: Finished difference Result 58311 states and 140194 transitions. [2022-02-18 17:37:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2022-02-18 17:37:55,474 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2022-02-18 17:37:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:37:55,612 INFO L225 Difference]: With dead ends: 58311 [2022-02-18 17:37:55,612 INFO L226 Difference]: Without dead ends: 58065 [2022-02-18 17:37:55,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 54 SyntacticMatches, 19 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34136 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=11952, Invalid=62850, Unknown=0, NotChecked=0, Total=74802 [2022-02-18 17:37:55,615 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 914 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 2914 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 4127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 2914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 801 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-18 17:37:55,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 422 Invalid, 4127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 2914 Invalid, 0 Unknown, 801 Unchecked, 1.5s Time] [2022-02-18 17:37:55,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58065 states. [2022-02-18 17:37:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58065 to 43495. [2022-02-18 17:37:56,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43495 states, 43494 states have (on average 2.4314388191474685) internal successors, (105753), 43494 states have internal predecessors, (105753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:37:56,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43495 states to 43495 states and 105753 transitions. [2022-02-18 17:37:56,723 INFO L78 Accepts]: Start accepts. Automaton has 43495 states and 105753 transitions. Word has length 35 [2022-02-18 17:37:56,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:37:56,723 INFO L470 AbstractCegarLoop]: Abstraction has 43495 states and 105753 transitions. [2022-02-18 17:37:56,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:37:56,723 INFO L276 IsEmpty]: Start isEmpty. Operand 43495 states and 105753 transitions. [2022-02-18 17:37:56,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-18 17:37:56,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:37:56,762 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:37:56,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-18 17:37:56,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:37:56,963 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:37:56,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:37:56,963 INFO L85 PathProgramCache]: Analyzing trace with hash 571032451, now seen corresponding path program 57 times [2022-02-18 17:37:56,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:37:56,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123683190] [2022-02-18 17:37:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:37:56,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:37:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:37:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-18 17:37:57,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:37:57,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123683190] [2022-02-18 17:37:57,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123683190] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:37:57,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456168251] [2022-02-18 17:37:57,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:37:57,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:37:57,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:37:57,207 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:37:57,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-18 17:37:57,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-18 17:37:57,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:37:57,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 17:37:57,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:37:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:37:58,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:38:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:38:00,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456168251] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:38:00,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:38:00,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 18] total 44 [2022-02-18 17:38:00,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383673142] [2022-02-18 17:38:00,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:38:00,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-18 17:38:00,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:38:00,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-18 17:38:00,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1528, Unknown=0, NotChecked=0, Total=1892 [2022-02-18 17:38:00,147 INFO L87 Difference]: Start difference. First operand 43495 states and 105753 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-02-18 17:38:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-02-18 17:38:20,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 21712 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=9062, Invalid=44068, Unknown=0, NotChecked=0, Total=53130 [2022-02-18 17:38:20,817 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 670 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 2516 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 2978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 2516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-18 17:38:20,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 365 Invalid, 2978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 2516 Invalid, 0 Unknown, 107 Unchecked, 1.4s Time] [2022-02-18 17:38:20,818 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-18 17:38:20,824 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-18 17:38:20,824 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-18 17:38:20,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-18 17:38:21,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-18 17:38:21,019 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (43495states) and FLOYD_HOARE automaton (currently 192 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (16891 states constructed, input type IntersectNwa). [2022-02-18 17:38:21,021 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-18 17:38:21,021 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-18 17:38:21,023 INFO L732 BasicCegarLoop]: Path program histogram: [57, 1, 1] [2022-02-18 17:38:21,025 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-18 17:38:21,025 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-18 17:38:21,031 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 05:38:21 BasicIcfg [2022-02-18 17:38:21,031 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-18 17:38:21,031 INFO L158 Benchmark]: Toolchain (without parser) took 744082.82ms. Allocated memory was 195.0MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 159.2MB in the beginning and 603.3MB in the end (delta: -444.0MB). Peak memory consumption was 833.2MB. Max. memory is 8.0GB. [2022-02-18 17:38:21,031 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 195.0MB. Free memory is still 160.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-18 17:38:21,031 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.20ms. Allocated memory is still 195.0MB. Free memory was 159.1MB in the beginning and 157.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-18 17:38:21,031 INFO L158 Benchmark]: Boogie Preprocessor took 13.12ms. Allocated memory is still 195.0MB. Free memory was 157.6MB in the beginning and 156.7MB in the end (delta: 880.5kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-18 17:38:21,032 INFO L158 Benchmark]: RCFGBuilder took 172.45ms. Allocated memory is still 195.0MB. Free memory was 156.6MB in the beginning and 147.8MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-02-18 17:38:21,032 INFO L158 Benchmark]: TraceAbstraction took 743872.49ms. Allocated memory was 195.0MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 147.3MB in the beginning and 603.3MB in the end (delta: -456.0MB). Peak memory consumption was 820.6MB. Max. memory is 8.0GB. [2022-02-18 17:38:21,032 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12ms. Allocated memory is still 195.0MB. Free memory is still 160.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.20ms. Allocated memory is still 195.0MB. Free memory was 159.1MB in the beginning and 157.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.12ms. Allocated memory is still 195.0MB. Free memory was 157.6MB in the beginning and 156.7MB in the end (delta: 880.5kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 172.45ms. Allocated memory is still 195.0MB. Free memory was 156.6MB in the beginning and 147.8MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 743872.49ms. Allocated memory was 195.0MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 147.3MB in the beginning and 603.3MB in the end (delta: -456.0MB). Peak memory consumption was 820.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (43495states) and FLOYD_HOARE automaton (currently 192 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (16891 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (43495states) and FLOYD_HOARE automaton (currently 192 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (16891 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (43495states) and FLOYD_HOARE automaton (currently 192 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (16891 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 743.8s, OverallIterations: 59, TraceHistogramMax: 5, PathProgramHistogramMax: 57, EmptinessCheckTime: 0.6s, AutomataDifference: 631.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 37528 SdHoareTripleChecker+Valid, 46.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 37528 mSDsluCounter, 19684 SdHoareTripleChecker+Invalid, 39.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 13089 IncrementalHoareTripleChecker+Unchecked, 37289 mSDsCounter, 14132 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 90355 IncrementalHoareTripleChecker+Invalid, 117576 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14132 mSolverCounterUnsat, 1135 mSDtfsCounter, 90355 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11662 GetRequests, 2369 SyntacticMatches, 322 SemanticMatches, 8971 ConstructedPredicates, 0 IntricatePredicates, 16 DeprecatedPredicates, 830998 ImplicationChecksByTransitivity, 604.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43495occurred in iteration=58, InterpolantAutomatonStates: 7228, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 13.5s AutomataMinimizationTime, 58 MinimizatonAttempts, 275273 StatesRemovedByMinimization, 58 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 83.9s InterpolantComputationTime, 3482 NumberOfCodeBlocks, 3482 NumberOfCodeBlocksAsserted, 255 NumberOfCheckSat, 5034 ConstructedInterpolants, 96 QuantifiedInterpolants, 95032 SizeOfPredicates, 474 NumberOfNonLiveVariables, 3828 ConjunctsInSsa, 1461 ConjunctsInUnsatCore, 173 InterpolantComputations, 2 PerfectInterpolantSequences, 449/5410 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown