/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/mult-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-bc289cb [2022-01-28 15:19:48,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-28 15:19:48,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-28 15:19:48,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-28 15:19:48,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-28 15:19:48,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-28 15:19:48,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-28 15:19:48,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-28 15:19:48,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-28 15:19:48,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-28 15:19:48,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-28 15:19:48,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-28 15:19:48,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-28 15:19:48,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-28 15:19:48,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-28 15:19:48,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-28 15:19:48,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-28 15:19:48,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-28 15:19:48,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-28 15:19:48,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-28 15:19:48,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-28 15:19:48,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-28 15:19:48,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-28 15:19:48,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-28 15:19:48,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-28 15:19:48,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-28 15:19:48,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-28 15:19:48,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-28 15:19:48,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-28 15:19:48,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-28 15:19:48,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-28 15:19:48,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-28 15:19:48,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-28 15:19:48,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-28 15:19:48,493 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-28 15:19:48,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-28 15:19:48,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-28 15:19:48,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-28 15:19:48,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-28 15:19:48,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-28 15:19:48,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-28 15:19:48,496 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-01-28 15:19:48,533 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-28 15:19:48,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-28 15:19:48,533 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-28 15:19:48,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-28 15:19:48,534 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-28 15:19:48,534 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-28 15:19:48,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-28 15:19:48,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-28 15:19:48,535 INFO L138 SettingsManager]: * Use SBE=true [2022-01-28 15:19:48,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-28 15:19:48,535 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-28 15:19:48,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-28 15:19:48,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-28 15:19:48,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-28 15:19:48,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-28 15:19:48,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-28 15:19:48,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-28 15:19:48,536 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-28 15:19:48,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-28 15:19:48,536 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-28 15:19:48,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-28 15:19:48,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-28 15:19:48,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-28 15:19:48,536 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-28 15:19:48,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-28 15:19:48,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:19:48,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-28 15:19:48,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-28 15:19:48,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-28 15:19:48,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-28 15:19:48,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-28 15:19:48,537 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-28 15:19:48,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-28 15:19:48,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-28 15:19:48,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-28 15:19:48,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-28 15:19:48,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-28 15:19:48,728 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-28 15:19:48,731 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-28 15:19:48,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl [2022-01-28 15:19:48,732 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl' [2022-01-28 15:19:48,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-28 15:19:48,753 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-28 15:19:48,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-28 15:19:48,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-28 15:19:48,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-28 15:19:48,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:48" (1/1) ... [2022-01-28 15:19:48,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:48" (1/1) ... [2022-01-28 15:19:48,770 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-28 15:19:48,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-28 15:19:48,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-28 15:19:48,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-28 15:19:48,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-28 15:19:48,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:48" (1/1) ... [2022-01-28 15:19:48,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:48" (1/1) ... [2022-01-28 15:19:48,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:48" (1/1) ... [2022-01-28 15:19:48,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:48" (1/1) ... [2022-01-28 15:19:48,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:48" (1/1) ... [2022-01-28 15:19:48,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:48" (1/1) ... [2022-01-28 15:19:48,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:48" (1/1) ... [2022-01-28 15:19:48,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-28 15:19:48,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-28 15:19:48,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-28 15:19:48,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-28 15:19:48,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:48" (1/1) ... [2022-01-28 15:19:48,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:19:48,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:48,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-28 15:19:48,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-28 15:19:48,860 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-28 15:19:48,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-28 15:19:48,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-28 15:19:48,860 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-28 15:19:48,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-28 15:19:48,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-28 15:19:48,860 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-28 15:19:48,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-28 15:19:48,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-28 15:19:48,861 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-28 15:19:48,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-28 15:19:48,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-28 15:19:48,861 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-28 15:19:48,895 INFO L234 CfgBuilder]: Building ICFG [2022-01-28 15:19:48,896 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-28 15:19:48,996 INFO L275 CfgBuilder]: Performing block encoding [2022-01-28 15:19:49,015 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-28 15:19:49,015 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-28 15:19:49,018 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:19:49 BoogieIcfgContainer [2022-01-28 15:19:49,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-28 15:19:49,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-28 15:19:49,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-28 15:19:49,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-28 15:19:49,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:48" (1/2) ... [2022-01-28 15:19:49,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@445c751c and model type mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:19:49, skipping insertion in model container [2022-01-28 15:19:49,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:19:49" (2/2) ... [2022-01-28 15:19:49,024 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-equiv.wvr.bpl [2022-01-28 15:19:49,027 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-28 15:19:49,028 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-28 15:19:49,028 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-28 15:19:49,028 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-28 15:19:49,069 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-28 15:19:49,121 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-28 15:19:49,126 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-28 15:19:49,126 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-28 15:19:49,145 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2022-01-28 15:19:49,185 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:49,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:49,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-28 15:19:49,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:49,197 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:49,198 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:49,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:49,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1698272252, now seen corresponding path program 1 times [2022-01-28 15:19:49,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:49,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321555063] [2022-01-28 15:19:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:49,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:49,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:49,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321555063] [2022-01-28 15:19:49,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321555063] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:19:49,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:19:49,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-28 15:19:49,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395343055] [2022-01-28 15:19:49,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:49,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-28 15:19:49,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:49,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-28 15:19:49,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 15:19:49,397 INFO L87 Difference]: Start difference. First operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 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 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) [2022-01-28 15:19:49,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:49,462 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2022-01-28 15:19:49,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 15:19:49,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 [2022-01-28 15:19:49,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:49,471 INFO L225 Difference]: With dead ends: 214 [2022-01-28 15:19:49,472 INFO L226 Difference]: Without dead ends: 199 [2022-01-28 15:19:49,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 15:19:49,475 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:49,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:49,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-28 15:19:49,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2022-01-28 15:19:49,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:49,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2022-01-28 15:19:49,542 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2022-01-28 15:19:49,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:49,542 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2022-01-28 15:19:49,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) [2022-01-28 15:19:49,543 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2022-01-28 15:19:49,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-28 15:19:49,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:49,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:49,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-28 15:19:49,545 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:49,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:49,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1717701342, now seen corresponding path program 1 times [2022-01-28 15:19:49,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:49,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318047315] [2022-01-28 15:19:49,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:49,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:49,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:49,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318047315] [2022-01-28 15:19:49,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318047315] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:49,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000234589] [2022-01-28 15:19:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:49,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:49,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:49,596 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:49,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-28 15:19:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:49,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-28 15:19:49,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:49,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:49,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000234589] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:49,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-28 15:19:49,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 7 [2022-01-28 15:19:49,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107876500] [2022-01-28 15:19:49,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:49,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:19:49,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:49,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:19:49,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:19:49,798 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2022-01-28 15:19:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:49,848 INFO L93 Difference]: Finished difference Result 284 states and 788 transitions. [2022-01-28 15:19:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 15:19:49,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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 [2022-01-28 15:19:49,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:49,851 INFO L225 Difference]: With dead ends: 284 [2022-01-28 15:19:49,851 INFO L226 Difference]: Without dead ends: 284 [2022-01-28 15:19:49,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:19:49,852 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:49,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:49,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-28 15:19:49,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 176. [2022-01-28 15:19:49,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 3.0114285714285716) internal successors, (527), 175 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 527 transitions. [2022-01-28 15:19:49,864 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 527 transitions. Word has length 17 [2022-01-28 15:19:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:49,864 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 527 transitions. [2022-01-28 15:19:49,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2022-01-28 15:19:49,864 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 527 transitions. [2022-01-28 15:19:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-28 15:19:49,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:49,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:49,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:50,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:50,076 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:50,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:50,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1520327836, now seen corresponding path program 1 times [2022-01-28 15:19:50,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:50,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776609569] [2022-01-28 15:19:50,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:50,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:50,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:50,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776609569] [2022-01-28 15:19:50,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776609569] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:19:50,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:19:50,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:19:50,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371264578] [2022-01-28 15:19:50,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:50,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:19:50,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:50,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:19:50,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:19:50,119 INFO L87 Difference]: Start difference. First operand 176 states and 527 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2022-01-28 15:19:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:50,171 INFO L93 Difference]: Finished difference Result 240 states and 691 transitions. [2022-01-28 15:19:50,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 15:19:50,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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 [2022-01-28 15:19:50,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:50,174 INFO L225 Difference]: With dead ends: 240 [2022-01-28 15:19:50,174 INFO L226 Difference]: Without dead ends: 240 [2022-01-28 15:19:50,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:19:50,175 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:50,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:50,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-28 15:19:50,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 191. [2022-01-28 15:19:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 3.0) internal successors, (570), 190 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 570 transitions. [2022-01-28 15:19:50,185 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 570 transitions. Word has length 17 [2022-01-28 15:19:50,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:50,185 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 570 transitions. [2022-01-28 15:19:50,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2022-01-28 15:19:50,185 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 570 transitions. [2022-01-28 15:19:50,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-28 15:19:50,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:50,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:50,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-28 15:19:50,187 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:50,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:50,187 INFO L85 PathProgramCache]: Analyzing trace with hash 721287832, now seen corresponding path program 2 times [2022-01-28 15:19:50,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:50,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799217594] [2022-01-28 15:19:50,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:50,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:50,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:50,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799217594] [2022-01-28 15:19:50,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799217594] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:19:50,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:19:50,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 15:19:50,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233092022] [2022-01-28 15:19:50,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:50,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:19:50,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:50,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:19:50,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:19:50,232 INFO L87 Difference]: Start difference. First operand 191 states and 570 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) [2022-01-28 15:19:50,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:50,280 INFO L93 Difference]: Finished difference Result 312 states and 867 transitions. [2022-01-28 15:19:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:19:50,280 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 [2022-01-28 15:19:50,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:50,283 INFO L225 Difference]: With dead ends: 312 [2022-01-28 15:19:50,283 INFO L226 Difference]: Without dead ends: 312 [2022-01-28 15:19:50,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:19:50,290 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:50,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 27 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:50,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-28 15:19:50,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 170. [2022-01-28 15:19:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.9763313609467454) internal successors, (503), 169 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 503 transitions. [2022-01-28 15:19:50,304 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 503 transitions. Word has length 17 [2022-01-28 15:19:50,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:50,305 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 503 transitions. [2022-01-28 15:19:50,305 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) [2022-01-28 15:19:50,305 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 503 transitions. [2022-01-28 15:19:50,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-28 15:19:50,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:50,306 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:50,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-28 15:19:50,306 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:50,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:50,307 INFO L85 PathProgramCache]: Analyzing trace with hash 388922714, now seen corresponding path program 1 times [2022-01-28 15:19:50,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:50,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530510230] [2022-01-28 15:19:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:50,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:50,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:50,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530510230] [2022-01-28 15:19:50,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530510230] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:19:50,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:19:50,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:19:50,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728716982] [2022-01-28 15:19:50,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:50,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:19:50,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:50,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:19:50,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:19:50,351 INFO L87 Difference]: Start difference. First operand 170 states and 503 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2022-01-28 15:19:50,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:50,397 INFO L93 Difference]: Finished difference Result 192 states and 530 transitions. [2022-01-28 15:19:50,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:19:50,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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 [2022-01-28 15:19:50,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:50,398 INFO L225 Difference]: With dead ends: 192 [2022-01-28 15:19:50,398 INFO L226 Difference]: Without dead ends: 162 [2022-01-28 15:19:50,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:19:50,403 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:50,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 19 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:50,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-28 15:19:50,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2022-01-28 15:19:50,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.9324324324324325) internal successors, (434), 148 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:50,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 434 transitions. [2022-01-28 15:19:50,418 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 434 transitions. Word has length 17 [2022-01-28 15:19:50,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:50,419 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 434 transitions. [2022-01-28 15:19:50,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2022-01-28 15:19:50,419 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 434 transitions. [2022-01-28 15:19:50,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-28 15:19:50,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:50,425 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:50,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-28 15:19:50,425 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:50,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:50,426 INFO L85 PathProgramCache]: Analyzing trace with hash 336279062, now seen corresponding path program 2 times [2022-01-28 15:19:50,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:50,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319475170] [2022-01-28 15:19:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:50,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:50,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:50,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319475170] [2022-01-28 15:19:50,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319475170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:50,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455041942] [2022-01-28 15:19:50,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:19:50,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:50,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:50,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:50,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-28 15:19:50,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:19:50,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:50,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-28 15:19:50,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:50,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:50,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455041942] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:50,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-28 15:19:50,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2022-01-28 15:19:50,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636791380] [2022-01-28 15:19:50,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:50,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:19:50,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:50,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:19:50,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-28 15:19:50,619 INFO L87 Difference]: Start difference. First operand 149 states and 434 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2022-01-28 15:19:50,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:50,655 INFO L93 Difference]: Finished difference Result 245 states and 688 transitions. [2022-01-28 15:19:50,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 15:19:50,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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 [2022-01-28 15:19:50,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:50,656 INFO L225 Difference]: With dead ends: 245 [2022-01-28 15:19:50,656 INFO L226 Difference]: Without dead ends: 245 [2022-01-28 15:19:50,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-28 15:19:50,657 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:50,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 22 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-28 15:19:50,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 161. [2022-01-28 15:19:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.9375) internal successors, (470), 160 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 470 transitions. [2022-01-28 15:19:50,662 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 470 transitions. Word has length 17 [2022-01-28 15:19:50,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:50,662 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 470 transitions. [2022-01-28 15:19:50,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2022-01-28 15:19:50,662 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 470 transitions. [2022-01-28 15:19:50,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 15:19:50,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:50,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:50,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:50,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-28 15:19:50,874 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:50,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:50,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1880409020, now seen corresponding path program 1 times [2022-01-28 15:19:50,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:50,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101772227] [2022-01-28 15:19:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:50,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:50,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:50,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101772227] [2022-01-28 15:19:50,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101772227] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:50,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273089692] [2022-01-28 15:19:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:50,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:50,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:50,928 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:50,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-28 15:19:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:50,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 15:19:50,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:51,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:51,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273089692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:51,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:51,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-01-28 15:19:51,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556744005] [2022-01-28 15:19:51,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:51,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 15:19:51,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:51,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 15:19:51,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:19:51,073 INFO L87 Difference]: Start difference. First operand 161 states and 470 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:51,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:51,214 INFO L93 Difference]: Finished difference Result 404 states and 1123 transitions. [2022-01-28 15:19:51,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:19:51,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 15:19:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:51,216 INFO L225 Difference]: With dead ends: 404 [2022-01-28 15:19:51,216 INFO L226 Difference]: Without dead ends: 404 [2022-01-28 15:19:51,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:19:51,219 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:51,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 70 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:51,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-28 15:19:51,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 234. [2022-01-28 15:19:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.9871244635193133) internal successors, (696), 233 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 696 transitions. [2022-01-28 15:19:51,226 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 696 transitions. Word has length 19 [2022-01-28 15:19:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:51,227 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 696 transitions. [2022-01-28 15:19:51,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 696 transitions. [2022-01-28 15:19:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 15:19:51,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:51,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:51,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:51,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:51,443 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:51,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:51,444 INFO L85 PathProgramCache]: Analyzing trace with hash 34046910, now seen corresponding path program 1 times [2022-01-28 15:19:51,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:51,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053747838] [2022-01-28 15:19:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:51,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:51,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:51,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053747838] [2022-01-28 15:19:51,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053747838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:51,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561214990] [2022-01-28 15:19:51,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:51,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:51,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:51,519 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:51,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-28 15:19:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:51,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 15:19:51,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:51,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:51,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561214990] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:51,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:51,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-28 15:19:51,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172095034] [2022-01-28 15:19:51,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:51,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:19:51,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:51,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:19:51,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:19:51,687 INFO L87 Difference]: Start difference. First operand 234 states and 696 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:51,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:51,804 INFO L93 Difference]: Finished difference Result 445 states and 1311 transitions. [2022-01-28 15:19:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 15:19:51,805 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 15:19:51,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:51,807 INFO L225 Difference]: With dead ends: 445 [2022-01-28 15:19:51,807 INFO L226 Difference]: Without dead ends: 412 [2022-01-28 15:19:51,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:19:51,808 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:51,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 158 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-28 15:19:51,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 328. [2022-01-28 15:19:51,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.0611620795107033) internal successors, (1001), 327 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1001 transitions. [2022-01-28 15:19:51,816 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1001 transitions. Word has length 19 [2022-01-28 15:19:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:51,816 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 1001 transitions. [2022-01-28 15:19:51,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1001 transitions. [2022-01-28 15:19:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 15:19:51,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:51,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:51,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:52,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:52,028 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:52,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:52,028 INFO L85 PathProgramCache]: Analyzing trace with hash -846392150, now seen corresponding path program 2 times [2022-01-28 15:19:52,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:52,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942535730] [2022-01-28 15:19:52,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:52,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:52,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:52,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942535730] [2022-01-28 15:19:52,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942535730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:52,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351683955] [2022-01-28 15:19:52,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:19:52,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:52,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:52,081 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:52,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-28 15:19:52,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:19:52,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:52,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 15:19:52,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:52,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:52,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351683955] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:52,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:52,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-01-28 15:19:52,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434532923] [2022-01-28 15:19:52,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:52,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 15:19:52,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:52,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 15:19:52,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:19:52,236 INFO L87 Difference]: Start difference. First operand 328 states and 1001 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:52,286 INFO L93 Difference]: Finished difference Result 646 states and 1931 transitions. [2022-01-28 15:19:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-28 15:19:52,287 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 15:19:52,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:52,290 INFO L225 Difference]: With dead ends: 646 [2022-01-28 15:19:52,290 INFO L226 Difference]: Without dead ends: 631 [2022-01-28 15:19:52,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:19:52,291 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 48 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:52,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 113 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:52,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-28 15:19:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 390. [2022-01-28 15:19:52,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.16452442159383) internal successors, (1231), 389 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:52,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1231 transitions. [2022-01-28 15:19:52,302 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1231 transitions. Word has length 19 [2022-01-28 15:19:52,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:52,303 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1231 transitions. [2022-01-28 15:19:52,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:52,303 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1231 transitions. [2022-01-28 15:19:52,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 15:19:52,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:52,304 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:52,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:52,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:52,520 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:52,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:52,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1555602956, now seen corresponding path program 3 times [2022-01-28 15:19:52,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:52,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875938110] [2022-01-28 15:19:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:52,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:52,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:52,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875938110] [2022-01-28 15:19:52,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875938110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:52,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500260398] [2022-01-28 15:19:52,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:19:52,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:52,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:52,576 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:52,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-28 15:19:52,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:19:52,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:52,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 15:19:52,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:52,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:52,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500260398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:52,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:52,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-28 15:19:52,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242518287] [2022-01-28 15:19:52,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:52,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:19:52,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:52,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:19:52,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:19:52,684 INFO L87 Difference]: Start difference. First operand 390 states and 1231 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:52,809 INFO L93 Difference]: Finished difference Result 816 states and 2463 transitions. [2022-01-28 15:19:52,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:19:52,809 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 15:19:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:52,812 INFO L225 Difference]: With dead ends: 816 [2022-01-28 15:19:52,812 INFO L226 Difference]: Without dead ends: 673 [2022-01-28 15:19:52,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:19:52,813 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:52,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 190 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:52,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-28 15:19:52,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 465. [2022-01-28 15:19:52,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.2349137931034484) internal successors, (1501), 464 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1501 transitions. [2022-01-28 15:19:52,824 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1501 transitions. Word has length 19 [2022-01-28 15:19:52,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:52,824 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 1501 transitions. [2022-01-28 15:19:52,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:52,824 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1501 transitions. [2022-01-28 15:19:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 15:19:52,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:52,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:52,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:53,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:53,042 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:53,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:53,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1118825264, now seen corresponding path program 2 times [2022-01-28 15:19:53,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:53,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465395004] [2022-01-28 15:19:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:53,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:53,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:53,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465395004] [2022-01-28 15:19:53,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465395004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:53,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900731858] [2022-01-28 15:19:53,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:19:53,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:53,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:53,068 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:53,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-28 15:19:53,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:19:53,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:53,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 15:19:53,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:53,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:53,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900731858] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:53,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:53,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-28 15:19:53,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018044550] [2022-01-28 15:19:53,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:53,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 15:19:53,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:53,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 15:19:53,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:19:53,172 INFO L87 Difference]: Start difference. First operand 465 states and 1501 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:53,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:53,313 INFO L93 Difference]: Finished difference Result 1402 states and 4444 transitions. [2022-01-28 15:19:53,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:19:53,314 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 15:19:53,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:53,319 INFO L225 Difference]: With dead ends: 1402 [2022-01-28 15:19:53,320 INFO L226 Difference]: Without dead ends: 1402 [2022-01-28 15:19:53,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:19:53,321 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:53,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 71 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:53,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2022-01-28 15:19:53,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 797. [2022-01-28 15:19:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.4032663316582914) internal successors, (2709), 796 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2709 transitions. [2022-01-28 15:19:53,342 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2709 transitions. Word has length 19 [2022-01-28 15:19:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:53,342 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 2709 transitions. [2022-01-28 15:19:53,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2709 transitions. [2022-01-28 15:19:53,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 15:19:53,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:53,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:53,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:53,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:53,564 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:53,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:53,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1604629368, now seen corresponding path program 3 times [2022-01-28 15:19:53,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:53,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045698957] [2022-01-28 15:19:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:53,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:53,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:53,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045698957] [2022-01-28 15:19:53,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045698957] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:53,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321514260] [2022-01-28 15:19:53,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:19:53,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:53,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:53,581 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:53,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-28 15:19:53,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:19:53,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:53,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 15:19:53,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:53,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:53,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321514260] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:53,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:53,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-28 15:19:53,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934829115] [2022-01-28 15:19:53,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:53,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 15:19:53,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:53,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 15:19:53,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:19:53,678 INFO L87 Difference]: Start difference. First operand 797 states and 2709 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:53,773 INFO L93 Difference]: Finished difference Result 1152 states and 3746 transitions. [2022-01-28 15:19:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:19:53,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 15:19:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:53,778 INFO L225 Difference]: With dead ends: 1152 [2022-01-28 15:19:53,778 INFO L226 Difference]: Without dead ends: 1140 [2022-01-28 15:19:53,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:19:53,778 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 88 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:53,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 21 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:53,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-01-28 15:19:53,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 653. [2022-01-28 15:19:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 3.585889570552147) internal successors, (2338), 652 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 2338 transitions. [2022-01-28 15:19:53,796 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 2338 transitions. Word has length 19 [2022-01-28 15:19:53,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:53,796 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 2338 transitions. [2022-01-28 15:19:53,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:53,797 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 2338 transitions. [2022-01-28 15:19:53,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:19:53,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:53,799 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:53,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:54,015 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,SelfDestructingSolverStorable11 [2022-01-28 15:19:54,015 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:54,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:54,015 INFO L85 PathProgramCache]: Analyzing trace with hash -671302374, now seen corresponding path program 4 times [2022-01-28 15:19:54,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:54,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117680003] [2022-01-28 15:19:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:54,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:54,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:54,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117680003] [2022-01-28 15:19:54,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117680003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:54,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825434431] [2022-01-28 15:19:54,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:19:54,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:54,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:54,080 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:54,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-28 15:19:54,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:19:54,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:54,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 15:19:54,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:54,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:54,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825434431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:54,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:54,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-01-28 15:19:54,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368471859] [2022-01-28 15:19:54,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:54,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:19:54,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:54,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:19:54,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:19:54,213 INFO L87 Difference]: Start difference. First operand 653 states and 2338 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:54,289 INFO L93 Difference]: Finished difference Result 1011 states and 3340 transitions. [2022-01-28 15:19:54,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 15:19:54,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:19:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:54,293 INFO L225 Difference]: With dead ends: 1011 [2022-01-28 15:19:54,293 INFO L226 Difference]: Without dead ends: 990 [2022-01-28 15:19:54,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:19:54,294 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 57 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:54,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 170 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:54,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-01-28 15:19:54,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 730. [2022-01-28 15:19:54,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.5486968449931413) internal successors, (2587), 729 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2587 transitions. [2022-01-28 15:19:54,312 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2587 transitions. Word has length 21 [2022-01-28 15:19:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:54,312 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 2587 transitions. [2022-01-28 15:19:54,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2587 transitions. [2022-01-28 15:19:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:19:54,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:54,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:54,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-28 15:19:54,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-28 15:19:54,532 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1112056780, now seen corresponding path program 5 times [2022-01-28 15:19:54,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:54,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319178657] [2022-01-28 15:19:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:54,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:54,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:54,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319178657] [2022-01-28 15:19:54,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319178657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:54,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360413333] [2022-01-28 15:19:54,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:19:54,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:54,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:54,584 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:54,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:19:54,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:54,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 15:19:54,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:54,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-28 15:19:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:54,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:54,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360413333] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:54,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:54,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-28 15:19:54,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680200858] [2022-01-28 15:19:54,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:54,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 15:19:54,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:54,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 15:19:54,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-28 15:19:54,720 INFO L87 Difference]: Start difference. First operand 730 states and 2587 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:54,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:54,816 INFO L93 Difference]: Finished difference Result 1051 states and 3509 transitions. [2022-01-28 15:19:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 15:19:54,817 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:19:54,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:54,821 INFO L225 Difference]: With dead ends: 1051 [2022-01-28 15:19:54,821 INFO L226 Difference]: Without dead ends: 1030 [2022-01-28 15:19:54,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:19:54,821 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:54,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 135 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:54,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-01-28 15:19:54,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 779. [2022-01-28 15:19:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.575835475578406) internal successors, (2782), 778 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2782 transitions. [2022-01-28 15:19:54,838 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2782 transitions. Word has length 21 [2022-01-28 15:19:54,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:54,838 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 2782 transitions. [2022-01-28 15:19:54,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:54,838 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2782 transitions. [2022-01-28 15:19:54,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:19:54,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:54,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:54,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:55,055 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,SelfDestructingSolverStorable13 [2022-01-28 15:19:55,056 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:55,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:55,056 INFO L85 PathProgramCache]: Analyzing trace with hash 190269072, now seen corresponding path program 6 times [2022-01-28 15:19:55,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:55,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870244402] [2022-01-28 15:19:55,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:55,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:55,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:55,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870244402] [2022-01-28 15:19:55,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870244402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:55,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059482600] [2022-01-28 15:19:55,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:19:55,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:55,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:55,125 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:55,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-28 15:19:55,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:19:55,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:55,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 15:19:55,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:55,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:55,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059482600] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:55,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:55,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-28 15:19:55,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525798699] [2022-01-28 15:19:55,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:55,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 15:19:55,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:55,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 15:19:55,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:19:55,305 INFO L87 Difference]: Start difference. First operand 779 states and 2782 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:55,458 INFO L93 Difference]: Finished difference Result 912 states and 3156 transitions. [2022-01-28 15:19:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:19:55,458 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:19:55,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:55,462 INFO L225 Difference]: With dead ends: 912 [2022-01-28 15:19:55,462 INFO L226 Difference]: Without dead ends: 885 [2022-01-28 15:19:55,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:19:55,463 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:55,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 178 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:55,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-01-28 15:19:55,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 798. [2022-01-28 15:19:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.5809284818067755) internal successors, (2854), 797 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:55,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2854 transitions. [2022-01-28 15:19:55,480 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2854 transitions. Word has length 21 [2022-01-28 15:19:55,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:55,481 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 2854 transitions. [2022-01-28 15:19:55,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:55,481 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2854 transitions. [2022-01-28 15:19:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:19:55,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:55,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:55,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:55,699 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,SelfDestructingSolverStorable14 [2022-01-28 15:19:55,699 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:55,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:55,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1942186592, now seen corresponding path program 4 times [2022-01-28 15:19:55,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:55,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985399805] [2022-01-28 15:19:55,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:55,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:55,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:55,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985399805] [2022-01-28 15:19:55,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985399805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:55,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953235027] [2022-01-28 15:19:55,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:19:55,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:55,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:55,725 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:55,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-28 15:19:55,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:19:55,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:55,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 15:19:55,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:55,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-28 15:19:55,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953235027] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:19:55,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-28 15:19:55,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-01-28 15:19:55,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065696625] [2022-01-28 15:19:55,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:55,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:19:55,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:55,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:19:55,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-28 15:19:55,786 INFO L87 Difference]: Start difference. First operand 798 states and 2854 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:55,845 INFO L93 Difference]: Finished difference Result 1037 states and 3469 transitions. [2022-01-28 15:19:55,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:19:55,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:19:55,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:55,849 INFO L225 Difference]: With dead ends: 1037 [2022-01-28 15:19:55,849 INFO L226 Difference]: Without dead ends: 1005 [2022-01-28 15:19:55,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:19:55,850 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:55,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 29 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:55,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-01-28 15:19:55,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 884. [2022-01-28 15:19:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.5130237825594564) internal successors, (3102), 883 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3102 transitions. [2022-01-28 15:19:55,886 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3102 transitions. Word has length 21 [2022-01-28 15:19:55,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:55,886 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 3102 transitions. [2022-01-28 15:19:55,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:55,886 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3102 transitions. [2022-01-28 15:19:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:19:55,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:55,888 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:55,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:56,089 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,SelfDestructingSolverStorable15 [2022-01-28 15:19:56,089 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:56,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:56,089 INFO L85 PathProgramCache]: Analyzing trace with hash 57075100, now seen corresponding path program 5 times [2022-01-28 15:19:56,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:56,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39426271] [2022-01-28 15:19:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:56,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:56,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:56,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39426271] [2022-01-28 15:19:56,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39426271] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:19:56,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:19:56,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 15:19:56,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927800184] [2022-01-28 15:19:56,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:56,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:19:56,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:56,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:19:56,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:19:56,116 INFO L87 Difference]: Start difference. First operand 884 states and 3102 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:56,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:56,150 INFO L93 Difference]: Finished difference Result 974 states and 3311 transitions. [2022-01-28 15:19:56,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:19:56,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:19:56,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:56,154 INFO L225 Difference]: With dead ends: 974 [2022-01-28 15:19:56,154 INFO L226 Difference]: Without dead ends: 926 [2022-01-28 15:19:56,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:19:56,155 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:56,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 51 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:56,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-01-28 15:19:56,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 830. [2022-01-28 15:19:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.525934861278649) internal successors, (2923), 829 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:56,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2923 transitions. [2022-01-28 15:19:56,172 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2923 transitions. Word has length 21 [2022-01-28 15:19:56,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:56,172 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2923 transitions. [2022-01-28 15:19:56,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2923 transitions. [2022-01-28 15:19:56,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:19:56,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:56,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:56,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-28 15:19:56,174 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:56,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:56,175 INFO L85 PathProgramCache]: Analyzing trace with hash -369540448, now seen corresponding path program 6 times [2022-01-28 15:19:56,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:56,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048614046] [2022-01-28 15:19:56,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:56,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:56,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:56,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048614046] [2022-01-28 15:19:56,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048614046] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:56,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771285433] [2022-01-28 15:19:56,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:19:56,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:56,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:56,200 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:56,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-28 15:19:56,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 15:19:56,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:56,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 15:19:56,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:56,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:56,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:56,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771285433] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:56,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-28 15:19:56,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2022-01-28 15:19:56,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023191456] [2022-01-28 15:19:56,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:56,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:19:56,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:56,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:19:56,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:19:56,330 INFO L87 Difference]: Start difference. First operand 830 states and 2923 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:56,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:56,362 INFO L93 Difference]: Finished difference Result 870 states and 3033 transitions. [2022-01-28 15:19:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:19:56,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:19:56,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:56,366 INFO L225 Difference]: With dead ends: 870 [2022-01-28 15:19:56,366 INFO L226 Difference]: Without dead ends: 857 [2022-01-28 15:19:56,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:19:56,366 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:56,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 16 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:56,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-01-28 15:19:56,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 804. [2022-01-28 15:19:56,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.5454545454545454) internal successors, (2847), 803 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2847 transitions. [2022-01-28 15:19:56,380 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2847 transitions. Word has length 21 [2022-01-28 15:19:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:56,380 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 2847 transitions. [2022-01-28 15:19:56,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2847 transitions. [2022-01-28 15:19:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:19:56,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:56,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:56,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:56,598 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,SelfDestructingSolverStorable17 [2022-01-28 15:19:56,599 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:56,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1428493028, now seen corresponding path program 7 times [2022-01-28 15:19:56,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:56,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822297857] [2022-01-28 15:19:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:56,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:56,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:56,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822297857] [2022-01-28 15:19:56,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822297857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:56,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082825132] [2022-01-28 15:19:56,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:19:56,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:56,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:56,616 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:56,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-28 15:19:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:56,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 15:19:56,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:56,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-28 15:19:56,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082825132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:19:56,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-28 15:19:56,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-01-28 15:19:56,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410752224] [2022-01-28 15:19:56,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:56,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:19:56,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:56,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:19:56,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:19:56,678 INFO L87 Difference]: Start difference. First operand 804 states and 2847 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:56,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:56,743 INFO L93 Difference]: Finished difference Result 1221 states and 4056 transitions. [2022-01-28 15:19:56,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:19:56,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:19:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:56,748 INFO L225 Difference]: With dead ends: 1221 [2022-01-28 15:19:56,748 INFO L226 Difference]: Without dead ends: 1201 [2022-01-28 15:19:56,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:19:56,748 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:56,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 42 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:56,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-01-28 15:19:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 904. [2022-01-28 15:19:56,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.5957918050941307) internal successors, (3247), 903 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3247 transitions. [2022-01-28 15:19:56,767 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3247 transitions. Word has length 21 [2022-01-28 15:19:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:56,767 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 3247 transitions. [2022-01-28 15:19:56,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3247 transitions. [2022-01-28 15:19:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:19:56,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:56,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:56,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-28 15:19:56,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:56,995 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:56,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:56,996 INFO L85 PathProgramCache]: Analyzing trace with hash -679790180, now seen corresponding path program 8 times [2022-01-28 15:19:56,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:56,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992962231] [2022-01-28 15:19:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:56,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:57,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:57,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:57,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992962231] [2022-01-28 15:19:57,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992962231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:57,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606545343] [2022-01-28 15:19:57,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:19:57,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:57,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:57,018 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:57,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-28 15:19:57,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:19:57,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:57,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:19:57,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:57,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:57,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606545343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:57,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:57,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-01-28 15:19:57,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033999504] [2022-01-28 15:19:57,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:57,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 15:19:57,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:57,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 15:19:57,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:19:57,175 INFO L87 Difference]: Start difference. First operand 904 states and 3247 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:57,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:57,354 INFO L93 Difference]: Finished difference Result 1454 states and 4620 transitions. [2022-01-28 15:19:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:19:57,354 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:19:57,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:57,363 INFO L225 Difference]: With dead ends: 1454 [2022-01-28 15:19:57,363 INFO L226 Difference]: Without dead ends: 1412 [2022-01-28 15:19:57,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:19:57,364 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 139 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:57,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 118 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-01-28 15:19:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 920. [2022-01-28 15:19:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.5070729053318823) internal successors, (3223), 919 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3223 transitions. [2022-01-28 15:19:57,388 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3223 transitions. Word has length 21 [2022-01-28 15:19:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:57,389 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 3223 transitions. [2022-01-28 15:19:57,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3223 transitions. [2022-01-28 15:19:57,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:19:57,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:57,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:57,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:57,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:57,614 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:57,615 INFO L85 PathProgramCache]: Analyzing trace with hash -849904168, now seen corresponding path program 9 times [2022-01-28 15:19:57,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:57,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284056038] [2022-01-28 15:19:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:57,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:57,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:57,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284056038] [2022-01-28 15:19:57,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284056038] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:57,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007887264] [2022-01-28 15:19:57,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:19:57,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:57,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:57,648 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:57,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-28 15:19:57,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:19:57,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:57,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:19:57,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:57,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:57,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007887264] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:57,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:57,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-01-28 15:19:57,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914960298] [2022-01-28 15:19:57,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:57,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 15:19:57,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:57,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 15:19:57,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:19:57,794 INFO L87 Difference]: Start difference. First operand 920 states and 3223 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:57,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:57,961 INFO L93 Difference]: Finished difference Result 1679 states and 5671 transitions. [2022-01-28 15:19:57,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:19:57,961 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:19:57,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:57,967 INFO L225 Difference]: With dead ends: 1679 [2022-01-28 15:19:57,967 INFO L226 Difference]: Without dead ends: 1653 [2022-01-28 15:19:57,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:19:57,967 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 88 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:57,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 46 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:57,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-01-28 15:19:57,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1158. [2022-01-28 15:19:57,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.5419187554019014) internal successors, (4098), 1157 states have internal predecessors, (4098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:57,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 4098 transitions. [2022-01-28 15:19:57,990 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 4098 transitions. Word has length 21 [2022-01-28 15:19:57,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:57,990 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 4098 transitions. [2022-01-28 15:19:57,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:57,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 4098 transitions. [2022-01-28 15:19:57,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:19:57,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:57,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:58,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:58,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:58,210 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:58,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:58,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1595463124, now seen corresponding path program 10 times [2022-01-28 15:19:58,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:58,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693470784] [2022-01-28 15:19:58,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:58,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:58,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:58,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693470784] [2022-01-28 15:19:58,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693470784] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:58,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121605148] [2022-01-28 15:19:58,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:19:58,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:58,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:58,241 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:58,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-28 15:19:58,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:19:58,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:58,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:19:58,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:58,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:58,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121605148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:58,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:58,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-01-28 15:19:58,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658451632] [2022-01-28 15:19:58,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:58,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 15:19:58,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:58,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 15:19:58,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:19:58,409 INFO L87 Difference]: Start difference. First operand 1158 states and 4098 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:58,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:58,603 INFO L93 Difference]: Finished difference Result 2209 states and 7293 transitions. [2022-01-28 15:19:58,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:19:58,603 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:19:58,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:58,609 INFO L225 Difference]: With dead ends: 2209 [2022-01-28 15:19:58,609 INFO L226 Difference]: Without dead ends: 2209 [2022-01-28 15:19:58,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:19:58,610 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 125 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:58,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 103 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:58,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2022-01-28 15:19:58,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1285. [2022-01-28 15:19:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.5856697819314642) internal successors, (4604), 1284 states have internal predecessors, (4604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 4604 transitions. [2022-01-28 15:19:58,639 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 4604 transitions. Word has length 21 [2022-01-28 15:19:58,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:58,639 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 4604 transitions. [2022-01-28 15:19:58,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:58,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 4604 transitions. [2022-01-28 15:19:58,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:19:58,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:58,642 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:58,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:58,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:58,859 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:58,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:58,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1594229548, now seen corresponding path program 11 times [2022-01-28 15:19:58,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:58,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805889863] [2022-01-28 15:19:58,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:58,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:58,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:58,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805889863] [2022-01-28 15:19:58,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805889863] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:58,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387164637] [2022-01-28 15:19:58,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:19:58,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:58,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:58,888 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:58,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-28 15:19:58,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:19:58,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:58,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:19:58,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:58,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:59,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387164637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:59,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:59,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-01-28 15:19:59,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410246088] [2022-01-28 15:19:59,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:59,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:19:59,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:59,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:19:59,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:19:59,042 INFO L87 Difference]: Start difference. First operand 1285 states and 4604 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:59,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:59,273 INFO L93 Difference]: Finished difference Result 1613 states and 5504 transitions. [2022-01-28 15:19:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:19:59,273 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:19:59,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:59,277 INFO L225 Difference]: With dead ends: 1613 [2022-01-28 15:19:59,277 INFO L226 Difference]: Without dead ends: 1581 [2022-01-28 15:19:59,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:19:59,277 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 95 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:59,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 106 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:59,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2022-01-28 15:19:59,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1273. [2022-01-28 15:19:59,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 3.5550314465408803) internal successors, (4522), 1272 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 4522 transitions. [2022-01-28 15:19:59,301 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 4522 transitions. Word has length 21 [2022-01-28 15:19:59,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:59,301 INFO L470 AbstractCegarLoop]: Abstraction has 1273 states and 4522 transitions. [2022-01-28 15:19:59,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:59,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 4522 transitions. [2022-01-28 15:19:59,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:19:59,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:59,304 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:59,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:59,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:59,525 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:19:59,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:59,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1935867080, now seen corresponding path program 12 times [2022-01-28 15:19:59,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:59,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816425666] [2022-01-28 15:19:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:59,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:59,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:59,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816425666] [2022-01-28 15:19:59,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816425666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:59,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111518275] [2022-01-28 15:19:59,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:19:59,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:59,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:59,560 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:19:59,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-28 15:19:59,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:19:59,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:59,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:19:59,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:59,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:59,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111518275] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:59,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:59,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-01-28 15:19:59,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615400489] [2022-01-28 15:19:59,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:59,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:19:59,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:59,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:19:59,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:19:59,717 INFO L87 Difference]: Start difference. First operand 1273 states and 4522 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:59,897 INFO L93 Difference]: Finished difference Result 2164 states and 7115 transitions. [2022-01-28 15:19:59,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:19:59,897 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:19:59,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:59,902 INFO L225 Difference]: With dead ends: 2164 [2022-01-28 15:19:59,902 INFO L226 Difference]: Without dead ends: 2156 [2022-01-28 15:19:59,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:19:59,903 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 164 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:59,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 108 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:59,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2022-01-28 15:19:59,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1534. [2022-01-28 15:19:59,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 3.5851272015655575) internal successors, (5496), 1533 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:59,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 5496 transitions. [2022-01-28 15:19:59,934 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 5496 transitions. Word has length 21 [2022-01-28 15:19:59,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:59,934 INFO L470 AbstractCegarLoop]: Abstraction has 1534 states and 5496 transitions. [2022-01-28 15:19:59,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:59,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 5496 transitions. [2022-01-28 15:19:59,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:19:59,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:59,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:59,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:00,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:00,154 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:00,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:00,154 INFO L85 PathProgramCache]: Analyzing trace with hash 524199368, now seen corresponding path program 13 times [2022-01-28 15:20:00,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:00,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056977781] [2022-01-28 15:20:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:00,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:00,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:00,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056977781] [2022-01-28 15:20:00,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056977781] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:00,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741691541] [2022-01-28 15:20:00,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:20:00,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:00,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:00,193 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:00,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-28 15:20:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:00,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:20:00,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:00,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:00,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741691541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:00,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:00,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-01-28 15:20:00,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373352169] [2022-01-28 15:20:00,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:00,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:20:00,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:00,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:20:00,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:20:00,356 INFO L87 Difference]: Start difference. First operand 1534 states and 5496 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:00,569 INFO L93 Difference]: Finished difference Result 2841 states and 9935 transitions. [2022-01-28 15:20:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:20:00,570 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:20:00,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:00,575 INFO L225 Difference]: With dead ends: 2841 [2022-01-28 15:20:00,576 INFO L226 Difference]: Without dead ends: 2831 [2022-01-28 15:20:00,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:20:00,576 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 162 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:00,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 53 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:20:00,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2022-01-28 15:20:00,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 1813. [2022-01-28 15:20:00,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 3.587748344370861) internal successors, (6501), 1812 states have internal predecessors, (6501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:00,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 6501 transitions. [2022-01-28 15:20:00,615 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 6501 transitions. Word has length 21 [2022-01-28 15:20:00,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:00,615 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 6501 transitions. [2022-01-28 15:20:00,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:00,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 6501 transitions. [2022-01-28 15:20:00,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:20:00,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:00,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:00,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:00,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-28 15:20:00,827 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:00,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:00,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1808991432, now seen corresponding path program 14 times [2022-01-28 15:20:00,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:00,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624080030] [2022-01-28 15:20:00,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:00,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:00,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:00,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624080030] [2022-01-28 15:20:00,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624080030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:00,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406246858] [2022-01-28 15:20:00,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:20:00,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:00,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:00,848 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:00,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-28 15:20:00,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:20:00,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:00,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:20:00,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:00,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:01,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406246858] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:01,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:01,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-01-28 15:20:01,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599954505] [2022-01-28 15:20:01,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:01,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:20:01,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:01,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:20:01,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:20:01,005 INFO L87 Difference]: Start difference. First operand 1813 states and 6501 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:01,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:01,194 INFO L93 Difference]: Finished difference Result 2259 states and 7725 transitions. [2022-01-28 15:20:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:20:01,195 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:20:01,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:01,200 INFO L225 Difference]: With dead ends: 2259 [2022-01-28 15:20:01,200 INFO L226 Difference]: Without dead ends: 2247 [2022-01-28 15:20:01,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=232, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:20:01,201 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:01,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 83 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:20:01,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2022-01-28 15:20:01,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1809. [2022-01-28 15:20:01,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.587942477876106) internal successors, (6487), 1808 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6487 transitions. [2022-01-28 15:20:01,241 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6487 transitions. Word has length 21 [2022-01-28 15:20:01,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:01,241 INFO L470 AbstractCegarLoop]: Abstraction has 1809 states and 6487 transitions. [2022-01-28 15:20:01,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:01,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6487 transitions. [2022-01-28 15:20:01,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:20:01,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:01,245 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:01,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:01,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-28 15:20:01,459 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:01,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:01,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1458153844, now seen corresponding path program 15 times [2022-01-28 15:20:01,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:01,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911451559] [2022-01-28 15:20:01,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:01,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:01,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:01,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911451559] [2022-01-28 15:20:01,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911451559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:01,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812867406] [2022-01-28 15:20:01,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:20:01,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:01,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:01,486 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:01,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-28 15:20:01,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:20:01,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:01,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:20:01,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:01,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:01,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812867406] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:01,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:01,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-01-28 15:20:01,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716700320] [2022-01-28 15:20:01,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:01,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 15:20:01,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:01,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 15:20:01,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:20:01,645 INFO L87 Difference]: Start difference. First operand 1809 states and 6487 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:01,885 INFO L93 Difference]: Finished difference Result 3116 states and 10468 transitions. [2022-01-28 15:20:01,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 15:20:01,885 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:20:01,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:01,891 INFO L225 Difference]: With dead ends: 3116 [2022-01-28 15:20:01,891 INFO L226 Difference]: Without dead ends: 3116 [2022-01-28 15:20:01,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:20:01,892 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 119 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:01,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 161 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:20:01,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2022-01-28 15:20:01,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 1975. [2022-01-28 15:20:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 3.569908814589666) internal successors, (7047), 1974 states have internal predecessors, (7047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 7047 transitions. [2022-01-28 15:20:01,927 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 7047 transitions. Word has length 21 [2022-01-28 15:20:01,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:01,928 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 7047 transitions. [2022-01-28 15:20:01,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:01,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 7047 transitions. [2022-01-28 15:20:01,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:20:01,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:01,931 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:01,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-28 15:20:02,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-28 15:20:02,139 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:02,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:02,139 INFO L85 PathProgramCache]: Analyzing trace with hash -27282996, now seen corresponding path program 16 times [2022-01-28 15:20:02,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:02,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149879838] [2022-01-28 15:20:02,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:02,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:02,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:02,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149879838] [2022-01-28 15:20:02,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149879838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:02,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50526415] [2022-01-28 15:20:02,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:20:02,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:02,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:02,167 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:02,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-28 15:20:02,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:20:02,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:02,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:20:02,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:02,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:02,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50526415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:02,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:02,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-01-28 15:20:02,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430320176] [2022-01-28 15:20:02,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:02,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 15:20:02,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:02,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 15:20:02,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:20:02,310 INFO L87 Difference]: Start difference. First operand 1975 states and 7047 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:02,484 INFO L93 Difference]: Finished difference Result 2407 states and 8257 transitions. [2022-01-28 15:20:02,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:20:02,485 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:20:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:02,489 INFO L225 Difference]: With dead ends: 2407 [2022-01-28 15:20:02,489 INFO L226 Difference]: Without dead ends: 2361 [2022-01-28 15:20:02,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:20:02,489 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:02,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 73 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:20:02,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2022-01-28 15:20:02,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2032. [2022-01-28 15:20:02,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 3.539635647464303) internal successors, (7189), 2031 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 7189 transitions. [2022-01-28 15:20:02,521 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 7189 transitions. Word has length 21 [2022-01-28 15:20:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:02,521 INFO L470 AbstractCegarLoop]: Abstraction has 2032 states and 7189 transitions. [2022-01-28 15:20:02,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:02,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 7189 transitions. [2022-01-28 15:20:02,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:20:02,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:02,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:02,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:02,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:02,740 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:02,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:02,740 INFO L85 PathProgramCache]: Analyzing trace with hash 263688078, now seen corresponding path program 7 times [2022-01-28 15:20:02,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:02,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133596037] [2022-01-28 15:20:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:02,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:02,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:02,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133596037] [2022-01-28 15:20:02,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133596037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:02,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300481306] [2022-01-28 15:20:02,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:20:02,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:02,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:02,788 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:02,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-28 15:20:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:02,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 15:20:02,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:20:02,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:20:02,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300481306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:02,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:02,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-28 15:20:02,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287769871] [2022-01-28 15:20:02,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:02,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 15:20:02,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:02,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 15:20:02,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-28 15:20:02,916 INFO L87 Difference]: Start difference. First operand 2032 states and 7189 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:03,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:03,036 INFO L93 Difference]: Finished difference Result 2352 states and 8100 transitions. [2022-01-28 15:20:03,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 15:20:03,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:20:03,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:03,041 INFO L225 Difference]: With dead ends: 2352 [2022-01-28 15:20:03,041 INFO L226 Difference]: Without dead ends: 2331 [2022-01-28 15:20:03,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:20:03,046 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 60 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:03,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 207 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:20:03,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2022-01-28 15:20:03,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2045. [2022-01-28 15:20:03,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.5484344422700587) internal successors, (7253), 2044 states have internal predecessors, (7253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:03,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7253 transitions. [2022-01-28 15:20:03,090 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7253 transitions. Word has length 21 [2022-01-28 15:20:03,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:03,090 INFO L470 AbstractCegarLoop]: Abstraction has 2045 states and 7253 transitions. [2022-01-28 15:20:03,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:03,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7253 transitions. [2022-01-28 15:20:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:20:03,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:03,094 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:03,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:03,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-28 15:20:03,307 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:03,308 INFO L85 PathProgramCache]: Analyzing trace with hash -658099630, now seen corresponding path program 8 times [2022-01-28 15:20:03,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:03,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316726589] [2022-01-28 15:20:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:03,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:03,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:03,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316726589] [2022-01-28 15:20:03,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316726589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:03,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865400917] [2022-01-28 15:20:03,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:20:03,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:03,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:03,372 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:03,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-28 15:20:03,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:20:03,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:03,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 15:20:03,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:20:03,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:20:03,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865400917] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:03,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:03,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-28 15:20:03,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771441549] [2022-01-28 15:20:03,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:03,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 15:20:03,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:03,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 15:20:03,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:20:03,544 INFO L87 Difference]: Start difference. First operand 2045 states and 7253 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:03,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:03,656 INFO L93 Difference]: Finished difference Result 2262 states and 7867 transitions. [2022-01-28 15:20:03,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:20:03,657 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:20:03,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:03,661 INFO L225 Difference]: With dead ends: 2262 [2022-01-28 15:20:03,661 INFO L226 Difference]: Without dead ends: 2241 [2022-01-28 15:20:03,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:20:03,665 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:03,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 189 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:20:03,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2022-01-28 15:20:03,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 2055. [2022-01-28 15:20:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.552093476144109) internal successors, (7296), 2054 states have internal predecessors, (7296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:03,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 7296 transitions. [2022-01-28 15:20:03,705 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 7296 transitions. Word has length 21 [2022-01-28 15:20:03,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:03,705 INFO L470 AbstractCegarLoop]: Abstraction has 2055 states and 7296 transitions. [2022-01-28 15:20:03,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:03,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 7296 transitions. [2022-01-28 15:20:03,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:20:03,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:03,709 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:03,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:03,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:03,909 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:03,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:03,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1826441102, now seen corresponding path program 9 times [2022-01-28 15:20:03,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:03,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796087553] [2022-01-28 15:20:03,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:03,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:03,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:03,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796087553] [2022-01-28 15:20:03,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796087553] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:03,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487711026] [2022-01-28 15:20:03,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:20:03,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:03,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:03,985 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:03,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-28 15:20:04,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:20:04,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:04,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 15:20:04,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:20:04,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:20:04,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487711026] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:04,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:04,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-28 15:20:04,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527277511] [2022-01-28 15:20:04,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:04,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 15:20:04,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:04,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 15:20:04,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:20:04,125 INFO L87 Difference]: Start difference. First operand 2055 states and 7296 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:04,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:04,280 INFO L93 Difference]: Finished difference Result 2335 states and 8077 transitions. [2022-01-28 15:20:04,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:20:04,280 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:20:04,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:04,285 INFO L225 Difference]: With dead ends: 2335 [2022-01-28 15:20:04,285 INFO L226 Difference]: Without dead ends: 2314 [2022-01-28 15:20:04,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:20:04,286 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 61 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:04,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 276 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:20:04,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-01-28 15:20:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2071. [2022-01-28 15:20:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 2070 states have (on average 3.557487922705314) internal successors, (7364), 2070 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 7364 transitions. [2022-01-28 15:20:04,321 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 7364 transitions. Word has length 21 [2022-01-28 15:20:04,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:04,321 INFO L470 AbstractCegarLoop]: Abstraction has 2071 states and 7364 transitions. [2022-01-28 15:20:04,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:04,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 7364 transitions. [2022-01-28 15:20:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:04,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:04,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:04,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:04,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-01-28 15:20:04,541 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:04,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:04,541 INFO L85 PathProgramCache]: Analyzing trace with hash 766837372, now seen corresponding path program 10 times [2022-01-28 15:20:04,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:04,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045169396] [2022-01-28 15:20:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:04,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:04,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:04,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045169396] [2022-01-28 15:20:04,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045169396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:04,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11057369] [2022-01-28 15:20:04,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:20:04,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:04,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:04,571 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:04,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-28 15:20:04,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:20:04,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:04,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:20:04,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:04,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:04,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11057369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:04,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:04,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-01-28 15:20:04,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671120645] [2022-01-28 15:20:04,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:04,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:20:04,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:04,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:20:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:20:04,705 INFO L87 Difference]: Start difference. First operand 2071 states and 7364 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:04,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:04,991 INFO L93 Difference]: Finished difference Result 8017 states and 28472 transitions. [2022-01-28 15:20:04,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 15:20:04,991 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:04,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:05,008 INFO L225 Difference]: With dead ends: 8017 [2022-01-28 15:20:05,008 INFO L226 Difference]: Without dead ends: 8017 [2022-01-28 15:20:05,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:20:05,010 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:05,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 104 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:20:05,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8017 states. [2022-01-28 15:20:05,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8017 to 4750. [2022-01-28 15:20:05,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4750 states, 4749 states have (on average 3.6249736786691935) internal successors, (17215), 4749 states have internal predecessors, (17215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4750 states to 4750 states and 17215 transitions. [2022-01-28 15:20:05,140 INFO L78 Accepts]: Start accepts. Automaton has 4750 states and 17215 transitions. Word has length 23 [2022-01-28 15:20:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:05,140 INFO L470 AbstractCegarLoop]: Abstraction has 4750 states and 17215 transitions. [2022-01-28 15:20:05,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:05,140 INFO L276 IsEmpty]: Start isEmpty. Operand 4750 states and 17215 transitions. [2022-01-28 15:20:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:05,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:05,148 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:05,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:05,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:05,363 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:05,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:05,364 INFO L85 PathProgramCache]: Analyzing trace with hash -439625992, now seen corresponding path program 11 times [2022-01-28 15:20:05,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:05,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895278657] [2022-01-28 15:20:05,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:05,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:05,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:05,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895278657] [2022-01-28 15:20:05,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895278657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:05,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211072992] [2022-01-28 15:20:05,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:20:05,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:05,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:05,390 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:05,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-28 15:20:05,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:20:05,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:05,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:20:05,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:05,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:05,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211072992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:05,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:05,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-01-28 15:20:05,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635260956] [2022-01-28 15:20:05,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:05,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:20:05,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:05,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:20:05,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:20:05,531 INFO L87 Difference]: Start difference. First operand 4750 states and 17215 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:05,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:05,752 INFO L93 Difference]: Finished difference Result 5512 states and 19596 transitions. [2022-01-28 15:20:05,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:20:05,752 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:05,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:05,762 INFO L225 Difference]: With dead ends: 5512 [2022-01-28 15:20:05,762 INFO L226 Difference]: Without dead ends: 5456 [2022-01-28 15:20:05,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:20:05,763 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 165 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:05,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 53 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:20:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5456 states. [2022-01-28 15:20:05,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5456 to 4829. [2022-01-28 15:20:05,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4828 states have (on average 3.6184755592377797) internal successors, (17470), 4828 states have internal predecessors, (17470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 17470 transitions. [2022-01-28 15:20:05,903 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 17470 transitions. Word has length 23 [2022-01-28 15:20:05,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:05,904 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 17470 transitions. [2022-01-28 15:20:05,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 17470 transitions. [2022-01-28 15:20:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:05,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:05,912 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:05,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:06,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:06,127 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:06,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:06,128 INFO L85 PathProgramCache]: Analyzing trace with hash -630242892, now seen corresponding path program 12 times [2022-01-28 15:20:06,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:06,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330555152] [2022-01-28 15:20:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:06,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:06,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:06,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330555152] [2022-01-28 15:20:06,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330555152] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:06,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948959287] [2022-01-28 15:20:06,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:20:06,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:06,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:06,149 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:06,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-28 15:20:06,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:20:06,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:06,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:20:06,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:06,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:06,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948959287] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:06,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:06,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-28 15:20:06,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480478543] [2022-01-28 15:20:06,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:06,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:20:06,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:06,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:20:06,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:20:06,336 INFO L87 Difference]: Start difference. First operand 4829 states and 17470 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:06,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:06,709 INFO L93 Difference]: Finished difference Result 7408 states and 25768 transitions. [2022-01-28 15:20:06,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-28 15:20:06,710 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 [2022-01-28 15:20:06,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:06,724 INFO L225 Difference]: With dead ends: 7408 [2022-01-28 15:20:06,724 INFO L226 Difference]: Without dead ends: 7400 [2022-01-28 15:20:06,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:20:06,725 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 294 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:06,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 136 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:20:06,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7400 states. [2022-01-28 15:20:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7400 to 6112. [2022-01-28 15:20:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6112 states, 6111 states have (on average 3.6293568973981345) internal successors, (22179), 6111 states have internal predecessors, (22179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:06,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6112 states to 6112 states and 22179 transitions. [2022-01-28 15:20:06,861 INFO L78 Accepts]: Start accepts. Automaton has 6112 states and 22179 transitions. Word has length 23 [2022-01-28 15:20:06,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:06,861 INFO L470 AbstractCegarLoop]: Abstraction has 6112 states and 22179 transitions. [2022-01-28 15:20:06,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 6112 states and 22179 transitions. [2022-01-28 15:20:06,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:06,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:06,872 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:06,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-28 15:20:07,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:07,072 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:07,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2041910604, now seen corresponding path program 1 times [2022-01-28 15:20:07,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:07,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254626912] [2022-01-28 15:20:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:07,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:07,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:07,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254626912] [2022-01-28 15:20:07,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254626912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:07,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324273894] [2022-01-28 15:20:07,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:07,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:07,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:07,104 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:07,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-28 15:20:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:07,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:20:07,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:07,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:07,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324273894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:07,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:07,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-28 15:20:07,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038630326] [2022-01-28 15:20:07,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:07,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:20:07,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:07,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:20:07,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:20:07,313 INFO L87 Difference]: Start difference. First operand 6112 states and 22179 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:07,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:07,635 INFO L93 Difference]: Finished difference Result 14261 states and 51664 transitions. [2022-01-28 15:20:07,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 15:20:07,635 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 [2022-01-28 15:20:07,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:07,668 INFO L225 Difference]: With dead ends: 14261 [2022-01-28 15:20:07,668 INFO L226 Difference]: Without dead ends: 14255 [2022-01-28 15:20:07,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:20:07,669 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 222 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:07,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 70 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:20:07,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14255 states. [2022-01-28 15:20:07,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14255 to 11458. [2022-01-28 15:20:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11458 states, 11457 states have (on average 3.6823775857554333) internal successors, (42189), 11457 states have internal predecessors, (42189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:07,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11458 states to 11458 states and 42189 transitions. [2022-01-28 15:20:07,962 INFO L78 Accepts]: Start accepts. Automaton has 11458 states and 42189 transitions. Word has length 23 [2022-01-28 15:20:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:07,963 INFO L470 AbstractCegarLoop]: Abstraction has 11458 states and 42189 transitions. [2022-01-28 15:20:07,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:07,963 INFO L276 IsEmpty]: Start isEmpty. Operand 11458 states and 42189 transitions. [2022-01-28 15:20:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:07,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:07,984 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:08,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-28 15:20:08,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-01-28 15:20:08,185 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:08,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:08,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1063353160, now seen corresponding path program 2 times [2022-01-28 15:20:08,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:08,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977092419] [2022-01-28 15:20:08,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:08,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:08,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:08,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977092419] [2022-01-28 15:20:08,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977092419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:08,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286216065] [2022-01-28 15:20:08,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:20:08,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:08,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:08,219 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:08,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-28 15:20:08,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:20:08,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:08,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:20:08,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:08,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:08,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286216065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:08,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:08,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-28 15:20:08,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204522027] [2022-01-28 15:20:08,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:08,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:20:08,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:08,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:20:08,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:20:08,435 INFO L87 Difference]: Start difference. First operand 11458 states and 42189 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:08,952 INFO L93 Difference]: Finished difference Result 23254 states and 84564 transitions. [2022-01-28 15:20:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-28 15:20:08,952 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 [2022-01-28 15:20:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:09,015 INFO L225 Difference]: With dead ends: 23254 [2022-01-28 15:20:09,015 INFO L226 Difference]: Without dead ends: 23254 [2022-01-28 15:20:09,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=357, Invalid=699, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:20:09,016 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 294 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:09,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 162 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:09,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23254 states. [2022-01-28 15:20:09,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23254 to 18401. [2022-01-28 15:20:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18401 states, 18400 states have (on average 3.7019021739130435) internal successors, (68115), 18400 states have internal predecessors, (68115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18401 states to 18401 states and 68115 transitions. [2022-01-28 15:20:09,466 INFO L78 Accepts]: Start accepts. Automaton has 18401 states and 68115 transitions. Word has length 23 [2022-01-28 15:20:09,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:09,466 INFO L470 AbstractCegarLoop]: Abstraction has 18401 states and 68115 transitions. [2022-01-28 15:20:09,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:09,467 INFO L276 IsEmpty]: Start isEmpty. Operand 18401 states and 68115 transitions. [2022-01-28 15:20:09,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:09,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:09,495 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:09,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:09,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-28 15:20:09,696 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:09,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:09,696 INFO L85 PathProgramCache]: Analyzing trace with hash -757118540, now seen corresponding path program 13 times [2022-01-28 15:20:09,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:09,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794715597] [2022-01-28 15:20:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:09,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:09,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:09,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794715597] [2022-01-28 15:20:09,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794715597] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:09,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948904605] [2022-01-28 15:20:09,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:20:09,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:09,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:09,719 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:09,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-28 15:20:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:09,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:20:09,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:09,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:09,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948904605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:09,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:09,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-28 15:20:09,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073240012] [2022-01-28 15:20:09,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:09,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:20:09,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:09,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:20:09,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:20:09,940 INFO L87 Difference]: Start difference. First operand 18401 states and 68115 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:10,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:10,502 INFO L93 Difference]: Finished difference Result 19801 states and 72677 transitions. [2022-01-28 15:20:10,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-28 15:20:10,503 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 [2022-01-28 15:20:10,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:10,552 INFO L225 Difference]: With dead ends: 19801 [2022-01-28 15:20:10,552 INFO L226 Difference]: Without dead ends: 19781 [2022-01-28 15:20:10,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=475, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:20:10,552 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 223 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:10,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 98 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:10,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19781 states. [2022-01-28 15:20:10,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19781 to 18392. [2022-01-28 15:20:10,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18392 states, 18391 states have (on average 3.7013756728834757) internal successors, (68072), 18391 states have internal predecessors, (68072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:10,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18392 states to 18392 states and 68072 transitions. [2022-01-28 15:20:10,992 INFO L78 Accepts]: Start accepts. Automaton has 18392 states and 68072 transitions. Word has length 23 [2022-01-28 15:20:10,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:10,992 INFO L470 AbstractCegarLoop]: Abstraction has 18392 states and 68072 transitions. [2022-01-28 15:20:10,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:10,993 INFO L276 IsEmpty]: Start isEmpty. Operand 18392 states and 68072 transitions. [2022-01-28 15:20:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:11,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:11,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:11,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-28 15:20:11,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:11,231 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:11,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1151142540, now seen corresponding path program 3 times [2022-01-28 15:20:11,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:11,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101565386] [2022-01-28 15:20:11,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:11,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:11,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:11,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101565386] [2022-01-28 15:20:11,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101565386] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:11,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043640482] [2022-01-28 15:20:11,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:20:11,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:11,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:11,268 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:11,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-28 15:20:11,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:20:11,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:11,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:20:11,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:11,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:11,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043640482] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:11,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:11,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-28 15:20:11,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96201439] [2022-01-28 15:20:11,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:11,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:20:11,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:11,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:20:11,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:20:11,477 INFO L87 Difference]: Start difference. First operand 18392 states and 68072 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:12,098 INFO L93 Difference]: Finished difference Result 31050 states and 114087 transitions. [2022-01-28 15:20:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-28 15:20:12,099 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:12,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:12,185 INFO L225 Difference]: With dead ends: 31050 [2022-01-28 15:20:12,186 INFO L226 Difference]: Without dead ends: 31050 [2022-01-28 15:20:12,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 15:20:12,187 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 302 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:12,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 121 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:20:12,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31050 states. [2022-01-28 15:20:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31050 to 18487. [2022-01-28 15:20:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18487 states, 18486 states have (on average 3.6850589635399764) internal successors, (68122), 18486 states have internal predecessors, (68122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18487 states to 18487 states and 68122 transitions. [2022-01-28 15:20:12,743 INFO L78 Accepts]: Start accepts. Automaton has 18487 states and 68122 transitions. Word has length 23 [2022-01-28 15:20:12,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:12,743 INFO L470 AbstractCegarLoop]: Abstraction has 18487 states and 68122 transitions. [2022-01-28 15:20:12,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:12,743 INFO L276 IsEmpty]: Start isEmpty. Operand 18487 states and 68122 transitions. [2022-01-28 15:20:12,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:12,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:12,769 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:12,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-28 15:20:12,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-28 15:20:12,969 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:12,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:12,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1701574328, now seen corresponding path program 14 times [2022-01-28 15:20:12,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:12,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102973993] [2022-01-28 15:20:12,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:12,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:12,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:12,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102973993] [2022-01-28 15:20:12,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102973993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:12,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280269315] [2022-01-28 15:20:12,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:20:12,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:12,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:12,997 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:12,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-28 15:20:13,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:20:13,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:13,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:20:13,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:13,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:13,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280269315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:13,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:13,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-28 15:20:13,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831423739] [2022-01-28 15:20:13,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:13,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 15:20:13,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:13,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 15:20:13,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:20:13,171 INFO L87 Difference]: Start difference. First operand 18487 states and 68122 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:13,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:13,560 INFO L93 Difference]: Finished difference Result 19677 states and 71789 transitions. [2022-01-28 15:20:13,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 15:20:13,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:13,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:13,615 INFO L225 Difference]: With dead ends: 19677 [2022-01-28 15:20:13,615 INFO L226 Difference]: Without dead ends: 19617 [2022-01-28 15:20:13,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=442, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:20:13,619 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 247 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:13,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 75 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:20:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19617 states. [2022-01-28 15:20:14,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19617 to 18487. [2022-01-28 15:20:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18487 states, 18486 states have (on average 3.6806231742940603) internal successors, (68040), 18486 states have internal predecessors, (68040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18487 states to 18487 states and 68040 transitions. [2022-01-28 15:20:14,104 INFO L78 Accepts]: Start accepts. Automaton has 18487 states and 68040 transitions. Word has length 23 [2022-01-28 15:20:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:14,104 INFO L470 AbstractCegarLoop]: Abstraction has 18487 states and 68040 transitions. [2022-01-28 15:20:14,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:14,104 INFO L276 IsEmpty]: Start isEmpty. Operand 18487 states and 68040 transitions. [2022-01-28 15:20:14,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:14,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:14,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:14,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:14,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-28 15:20:14,349 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:14,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:14,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1169726578, now seen corresponding path program 4 times [2022-01-28 15:20:14,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:14,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498317168] [2022-01-28 15:20:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:14,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:14,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:14,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498317168] [2022-01-28 15:20:14,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498317168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:14,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386939812] [2022-01-28 15:20:14,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:20:14,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:14,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:14,427 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:14,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-28 15:20:14,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:20:14,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:14,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:20:14,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:14,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:14,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386939812] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:14,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:14,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-28 15:20:14,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129318763] [2022-01-28 15:20:14,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:14,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:20:14,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:14,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:20:14,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:20:14,948 INFO L87 Difference]: Start difference. First operand 18487 states and 68040 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:16,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:16,032 INFO L93 Difference]: Finished difference Result 26583 states and 95562 transitions. [2022-01-28 15:20:16,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-28 15:20:16,032 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:16,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:16,104 INFO L225 Difference]: With dead ends: 26583 [2022-01-28 15:20:16,104 INFO L226 Difference]: Without dead ends: 26479 [2022-01-28 15:20:16,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=391, Invalid=1415, Unknown=0, NotChecked=0, Total=1806 [2022-01-28 15:20:16,105 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 285 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:16,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 211 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:16,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26479 states. [2022-01-28 15:20:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26479 to 19145. [2022-01-28 15:20:16,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19145 states, 19144 states have (on average 3.6745716673631423) internal successors, (70346), 19144 states have internal predecessors, (70346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:16,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19145 states to 19145 states and 70346 transitions. [2022-01-28 15:20:16,552 INFO L78 Accepts]: Start accepts. Automaton has 19145 states and 70346 transitions. Word has length 23 [2022-01-28 15:20:16,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:16,552 INFO L470 AbstractCegarLoop]: Abstraction has 19145 states and 70346 transitions. [2022-01-28 15:20:16,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:16,552 INFO L276 IsEmpty]: Start isEmpty. Operand 19145 states and 70346 transitions. [2022-01-28 15:20:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:16,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:16,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:16,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-28 15:20:16,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-28 15:20:16,780 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:16,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:16,781 INFO L85 PathProgramCache]: Analyzing trace with hash -373032338, now seen corresponding path program 5 times [2022-01-28 15:20:16,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:16,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38100368] [2022-01-28 15:20:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:16,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:16,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:16,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38100368] [2022-01-28 15:20:16,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38100368] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:16,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077113521] [2022-01-28 15:20:16,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:20:16,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:16,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:16,939 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:16,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-28 15:20:16,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:20:16,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:16,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:20:16,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:17,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:17,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077113521] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:17,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:17,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-28 15:20:17,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932186022] [2022-01-28 15:20:17,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:17,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:20:17,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:17,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:20:17,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:20:17,409 INFO L87 Difference]: Start difference. First operand 19145 states and 70346 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:18,684 INFO L93 Difference]: Finished difference Result 23798 states and 85160 transitions. [2022-01-28 15:20:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-28 15:20:18,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-01-28 15:20:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:18,747 INFO L225 Difference]: With dead ends: 23798 [2022-01-28 15:20:18,747 INFO L226 Difference]: Without dead ends: 23730 [2022-01-28 15:20:18,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=614, Invalid=1642, Unknown=0, NotChecked=0, Total=2256 [2022-01-28 15:20:18,748 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 296 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:18,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 234 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:20:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23730 states. [2022-01-28 15:20:19,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23730 to 19143. [2022-01-28 15:20:19,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19143 states, 19142 states have (on average 3.6766795528157976) internal successors, (70379), 19142 states have internal predecessors, (70379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19143 states to 19143 states and 70379 transitions. [2022-01-28 15:20:19,191 INFO L78 Accepts]: Start accepts. Automaton has 19143 states and 70379 transitions. Word has length 23 [2022-01-28 15:20:19,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:19,192 INFO L470 AbstractCegarLoop]: Abstraction has 19143 states and 70379 transitions. [2022-01-28 15:20:19,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:19,192 INFO L276 IsEmpty]: Start isEmpty. Operand 19143 states and 70379 transitions. [2022-01-28 15:20:19,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:19,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:19,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:19,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-28 15:20:19,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:19,421 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:19,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:19,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1309018978, now seen corresponding path program 6 times [2022-01-28 15:20:19,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:19,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743338770] [2022-01-28 15:20:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:19,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:19,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:19,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743338770] [2022-01-28 15:20:19,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743338770] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:19,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182028418] [2022-01-28 15:20:19,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:20:19,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:19,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:19,485 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:19,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-28 15:20:19,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:20:19,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:19,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:20:19,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:19,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:19,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182028418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:19,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:19,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-28 15:20:19,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186050560] [2022-01-28 15:20:19,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:19,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:20:19,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:19,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:20:19,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:20:19,918 INFO L87 Difference]: Start difference. First operand 19143 states and 70379 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:21,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:21,756 INFO L93 Difference]: Finished difference Result 30651 states and 109812 transitions. [2022-01-28 15:20:21,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-28 15:20:21,756 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:21,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:21,847 INFO L225 Difference]: With dead ends: 30651 [2022-01-28 15:20:21,847 INFO L226 Difference]: Without dead ends: 30514 [2022-01-28 15:20:21,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=883, Invalid=2657, Unknown=0, NotChecked=0, Total=3540 [2022-01-28 15:20:21,848 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 329 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:21,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 282 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:20:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30514 states. [2022-01-28 15:20:22,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30514 to 19141. [2022-01-28 15:20:22,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19141 states, 19140 states have (on average 3.6748171368861025) internal successors, (70336), 19140 states have internal predecessors, (70336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:22,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19141 states to 19141 states and 70336 transitions. [2022-01-28 15:20:22,550 INFO L78 Accepts]: Start accepts. Automaton has 19141 states and 70336 transitions. Word has length 23 [2022-01-28 15:20:22,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:22,550 INFO L470 AbstractCegarLoop]: Abstraction has 19141 states and 70336 transitions. [2022-01-28 15:20:22,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:22,551 INFO L276 IsEmpty]: Start isEmpty. Operand 19141 states and 70336 transitions. [2022-01-28 15:20:22,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:22,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:22,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:22,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:22,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:22,781 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:22,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:22,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1260246626, now seen corresponding path program 7 times [2022-01-28 15:20:22,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:22,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214946080] [2022-01-28 15:20:22,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:22,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:22,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:22,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214946080] [2022-01-28 15:20:22,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214946080] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:22,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651242181] [2022-01-28 15:20:22,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:20:22,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:22,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:22,857 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:22,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-28 15:20:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:22,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:20:22,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:23,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:23,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651242181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:23,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:23,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-28 15:20:23,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345440558] [2022-01-28 15:20:23,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:23,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:20:23,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:23,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:20:23,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:20:23,258 INFO L87 Difference]: Start difference. First operand 19141 states and 70336 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:24,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:24,524 INFO L93 Difference]: Finished difference Result 25886 states and 92972 transitions. [2022-01-28 15:20:24,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-28 15:20:24,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-01-28 15:20:24,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:24,602 INFO L225 Difference]: With dead ends: 25886 [2022-01-28 15:20:24,602 INFO L226 Difference]: Without dead ends: 25814 [2022-01-28 15:20:24,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=577, Invalid=1775, Unknown=0, NotChecked=0, Total=2352 [2022-01-28 15:20:24,603 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 369 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:24,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 159 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:24,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25814 states. [2022-01-28 15:20:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25814 to 19134. [2022-01-28 15:20:25,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19134 states, 19133 states have (on average 3.674332305440861) internal successors, (70301), 19133 states have internal predecessors, (70301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:25,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19134 states to 19134 states and 70301 transitions. [2022-01-28 15:20:25,092 INFO L78 Accepts]: Start accepts. Automaton has 19134 states and 70301 transitions. Word has length 23 [2022-01-28 15:20:25,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:25,092 INFO L470 AbstractCegarLoop]: Abstraction has 19134 states and 70301 transitions. [2022-01-28 15:20:25,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:25,093 INFO L276 IsEmpty]: Start isEmpty. Operand 19134 states and 70301 transitions. [2022-01-28 15:20:25,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:25,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:25,121 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:25,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:25,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-28 15:20:25,322 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:25,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:25,322 INFO L85 PathProgramCache]: Analyzing trace with hash 18908732, now seen corresponding path program 8 times [2022-01-28 15:20:25,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:25,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825948945] [2022-01-28 15:20:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:25,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:25,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:25,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825948945] [2022-01-28 15:20:25,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825948945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:25,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741354655] [2022-01-28 15:20:25,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:20:25,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:25,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:25,389 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:25,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-28 15:20:25,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:20:25,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:25,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:20:25,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:25,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:25,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741354655] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:25,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:25,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-28 15:20:25,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118845174] [2022-01-28 15:20:25,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:25,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:20:25,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:25,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:20:25,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:20:25,799 INFO L87 Difference]: Start difference. First operand 19134 states and 70301 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:27,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:27,633 INFO L93 Difference]: Finished difference Result 27785 states and 99364 transitions. [2022-01-28 15:20:27,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-28 15:20:27,633 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:27,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:27,716 INFO L225 Difference]: With dead ends: 27785 [2022-01-28 15:20:27,716 INFO L226 Difference]: Without dead ends: 27383 [2022-01-28 15:20:27,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=765, Invalid=2315, Unknown=0, NotChecked=0, Total=3080 [2022-01-28 15:20:27,718 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 262 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:27,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 351 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:20:27,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27383 states. [2022-01-28 15:20:28,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27383 to 19977. [2022-01-28 15:20:28,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19977 states, 19976 states have (on average 3.6726571886263515) internal successors, (73365), 19976 states have internal predecessors, (73365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19977 states to 19977 states and 73365 transitions. [2022-01-28 15:20:28,319 INFO L78 Accepts]: Start accepts. Automaton has 19977 states and 73365 transitions. Word has length 23 [2022-01-28 15:20:28,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:28,319 INFO L470 AbstractCegarLoop]: Abstraction has 19977 states and 73365 transitions. [2022-01-28 15:20:28,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:28,319 INFO L276 IsEmpty]: Start isEmpty. Operand 19977 states and 73365 transitions. [2022-01-28 15:20:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:28,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:28,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:28,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-28 15:20:28,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-01-28 15:20:28,547 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:28,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1523850184, now seen corresponding path program 9 times [2022-01-28 15:20:28,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:28,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863496077] [2022-01-28 15:20:28,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:28,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:28,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:28,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863496077] [2022-01-28 15:20:28,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863496077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:28,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809007151] [2022-01-28 15:20:28,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:20:28,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:28,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:28,628 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:28,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-28 15:20:28,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:20:28,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:28,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:20:28,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:28,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:29,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809007151] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:29,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:29,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-28 15:20:29,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963027749] [2022-01-28 15:20:29,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:29,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:20:29,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:29,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:20:29,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:20:29,048 INFO L87 Difference]: Start difference. First operand 19977 states and 73365 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:30,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:30,989 INFO L93 Difference]: Finished difference Result 25576 states and 91647 transitions. [2022-01-28 15:20:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-28 15:20:30,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-01-28 15:20:30,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:31,053 INFO L225 Difference]: With dead ends: 25576 [2022-01-28 15:20:31,053 INFO L226 Difference]: Without dead ends: 25430 [2022-01-28 15:20:31,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=797, Invalid=2395, Unknown=0, NotChecked=0, Total=3192 [2022-01-28 15:20:31,054 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 288 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:31,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 301 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:20:31,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25430 states. [2022-01-28 15:20:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25430 to 20096. [2022-01-28 15:20:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20096 states, 20095 states have (on average 3.6825578502114955) internal successors, (74001), 20095 states have internal predecessors, (74001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:31,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20096 states to 20096 states and 74001 transitions. [2022-01-28 15:20:31,446 INFO L78 Accepts]: Start accepts. Automaton has 20096 states and 74001 transitions. Word has length 23 [2022-01-28 15:20:31,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:31,446 INFO L470 AbstractCegarLoop]: Abstraction has 20096 states and 74001 transitions. [2022-01-28 15:20:31,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:31,446 INFO L276 IsEmpty]: Start isEmpty. Operand 20096 states and 74001 transitions. [2022-01-28 15:20:31,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:31,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:31,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:31,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-28 15:20:31,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-28 15:20:31,676 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:31,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:31,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1508260856, now seen corresponding path program 10 times [2022-01-28 15:20:31,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:31,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601027989] [2022-01-28 15:20:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:31,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:31,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:31,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601027989] [2022-01-28 15:20:31,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601027989] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:31,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525320941] [2022-01-28 15:20:31,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:20:31,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:31,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:31,757 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:31,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-28 15:20:31,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:20:31,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:31,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:20:31,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:31,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:32,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525320941] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:32,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:32,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-28 15:20:32,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095461649] [2022-01-28 15:20:32,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:32,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:20:32,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:32,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:20:32,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:20:32,222 INFO L87 Difference]: Start difference. First operand 20096 states and 74001 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:33,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:33,544 INFO L93 Difference]: Finished difference Result 23226 states and 83737 transitions. [2022-01-28 15:20:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-28 15:20:33,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:33,601 INFO L225 Difference]: With dead ends: 23226 [2022-01-28 15:20:33,602 INFO L226 Difference]: Without dead ends: 22910 [2022-01-28 15:20:33,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=462, Invalid=1608, Unknown=0, NotChecked=0, Total=2070 [2022-01-28 15:20:33,603 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 301 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:33,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 194 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:33,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22910 states. [2022-01-28 15:20:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22910 to 20168. [2022-01-28 15:20:34,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20168 states, 20167 states have (on average 3.6824019437695243) internal successors, (74263), 20167 states have internal predecessors, (74263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20168 states to 20168 states and 74263 transitions. [2022-01-28 15:20:34,065 INFO L78 Accepts]: Start accepts. Automaton has 20168 states and 74263 transitions. Word has length 23 [2022-01-28 15:20:34,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:34,066 INFO L470 AbstractCegarLoop]: Abstraction has 20168 states and 74263 transitions. [2022-01-28 15:20:34,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:34,066 INFO L276 IsEmpty]: Start isEmpty. Operand 20168 states and 74263 transitions. [2022-01-28 15:20:34,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:34,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:34,097 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:34,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:34,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-28 15:20:34,298 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:34,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:34,298 INFO L85 PathProgramCache]: Analyzing trace with hash 449096986, now seen corresponding path program 11 times [2022-01-28 15:20:34,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:34,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202969707] [2022-01-28 15:20:34,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:34,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:34,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:34,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202969707] [2022-01-28 15:20:34,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202969707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:34,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269353436] [2022-01-28 15:20:34,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:20:34,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:34,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:34,394 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:34,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-28 15:20:34,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:20:34,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:34,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:20:34,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:34,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:34,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269353436] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:34,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:34,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-28 15:20:34,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408608343] [2022-01-28 15:20:34,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:34,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:20:34,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:34,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:20:34,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:20:34,832 INFO L87 Difference]: Start difference. First operand 20168 states and 74263 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:35,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:35,970 INFO L93 Difference]: Finished difference Result 26333 states and 95426 transitions. [2022-01-28 15:20:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-28 15:20:35,970 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:35,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:36,051 INFO L225 Difference]: With dead ends: 26333 [2022-01-28 15:20:36,051 INFO L226 Difference]: Without dead ends: 26182 [2022-01-28 15:20:36,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2022-01-28 15:20:36,052 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 189 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:36,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 293 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:20:36,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26182 states. [2022-01-28 15:20:36,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26182 to 20172. [2022-01-28 15:20:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20172 states, 20171 states have (on average 3.681969163650786) internal successors, (74269), 20171 states have internal predecessors, (74269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20172 states to 20172 states and 74269 transitions. [2022-01-28 15:20:36,569 INFO L78 Accepts]: Start accepts. Automaton has 20172 states and 74269 transitions. Word has length 23 [2022-01-28 15:20:36,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:36,569 INFO L470 AbstractCegarLoop]: Abstraction has 20172 states and 74269 transitions. [2022-01-28 15:20:36,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:36,569 INFO L276 IsEmpty]: Start isEmpty. Operand 20172 states and 74269 transitions. [2022-01-28 15:20:36,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:36,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:36,601 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:36,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-28 15:20:36,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:36,802 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:36,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:36,803 INFO L85 PathProgramCache]: Analyzing trace with hash 470852840, now seen corresponding path program 12 times [2022-01-28 15:20:36,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:36,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813847712] [2022-01-28 15:20:36,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:36,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:36,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:36,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813847712] [2022-01-28 15:20:36,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813847712] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:36,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515454736] [2022-01-28 15:20:36,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:20:36,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:36,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:36,848 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:36,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-28 15:20:36,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:20:36,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:36,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-28 15:20:36,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:36,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:37,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515454736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:37,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:37,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-28 15:20:37,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687469894] [2022-01-28 15:20:37,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:37,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:20:37,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:37,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:20:37,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:20:37,170 INFO L87 Difference]: Start difference. First operand 20172 states and 74269 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:38,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:38,107 INFO L93 Difference]: Finished difference Result 27160 states and 97914 transitions. [2022-01-28 15:20:38,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-28 15:20:38,107 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:38,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:38,183 INFO L225 Difference]: With dead ends: 27160 [2022-01-28 15:20:38,183 INFO L226 Difference]: Without dead ends: 27098 [2022-01-28 15:20:38,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=416, Invalid=1476, Unknown=0, NotChecked=0, Total=1892 [2022-01-28 15:20:38,184 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 273 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:38,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 305 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:20:38,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27098 states. [2022-01-28 15:20:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27098 to 20788. [2022-01-28 15:20:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20788 states, 20787 states have (on average 3.6719103285707413) internal successors, (76328), 20787 states have internal predecessors, (76328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20788 states to 20788 states and 76328 transitions. [2022-01-28 15:20:38,834 INFO L78 Accepts]: Start accepts. Automaton has 20788 states and 76328 transitions. Word has length 23 [2022-01-28 15:20:38,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:38,834 INFO L470 AbstractCegarLoop]: Abstraction has 20788 states and 76328 transitions. [2022-01-28 15:20:38,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:38,834 INFO L276 IsEmpty]: Start isEmpty. Operand 20788 states and 76328 transitions. [2022-01-28 15:20:38,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:38,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:38,865 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:38,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-28 15:20:39,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-28 15:20:39,065 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:39,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:39,066 INFO L85 PathProgramCache]: Analyzing trace with hash 328283496, now seen corresponding path program 13 times [2022-01-28 15:20:39,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:39,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272208996] [2022-01-28 15:20:39,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:39,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:39,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:39,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272208996] [2022-01-28 15:20:39,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272208996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:39,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928636103] [2022-01-28 15:20:39,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:20:39,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:39,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:39,112 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:39,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-28 15:20:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:39,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 15:20:39,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:39,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:39,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928636103] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:39,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:39,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-01-28 15:20:39,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919283404] [2022-01-28 15:20:39,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:39,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:20:39,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:39,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:20:39,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:20:39,417 INFO L87 Difference]: Start difference. First operand 20788 states and 76328 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:41,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:41,005 INFO L93 Difference]: Finished difference Result 49971 states and 181960 transitions. [2022-01-28 15:20:41,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-28 15:20:41,006 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:41,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:41,193 INFO L225 Difference]: With dead ends: 49971 [2022-01-28 15:20:41,193 INFO L226 Difference]: Without dead ends: 49953 [2022-01-28 15:20:41,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=914, Invalid=2746, Unknown=0, NotChecked=0, Total=3660 [2022-01-28 15:20:41,194 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 446 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:41,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 219 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49953 states. [2022-01-28 15:20:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49953 to 30093. [2022-01-28 15:20:42,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30093 states, 30092 states have (on average 3.6687824006380434) internal successors, (110401), 30092 states have internal predecessors, (110401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:42,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30093 states to 30093 states and 110401 transitions. [2022-01-28 15:20:42,099 INFO L78 Accepts]: Start accepts. Automaton has 30093 states and 110401 transitions. Word has length 23 [2022-01-28 15:20:42,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:42,099 INFO L470 AbstractCegarLoop]: Abstraction has 30093 states and 110401 transitions. [2022-01-28 15:20:42,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:42,099 INFO L276 IsEmpty]: Start isEmpty. Operand 30093 states and 110401 transitions. [2022-01-28 15:20:42,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:42,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:42,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:42,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:42,344 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,SelfDestructingSolverStorable48 [2022-01-28 15:20:42,345 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:42,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:42,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1368451066, now seen corresponding path program 14 times [2022-01-28 15:20:42,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:42,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470084567] [2022-01-28 15:20:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:42,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:42,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:42,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470084567] [2022-01-28 15:20:42,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470084567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:42,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080702079] [2022-01-28 15:20:42,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:20:42,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:42,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:42,396 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:42,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-28 15:20:42,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:20:42,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:42,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 15:20:42,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:42,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:42,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080702079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:42,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:42,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-01-28 15:20:42,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428153681] [2022-01-28 15:20:42,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:42,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:20:42,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:42,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:20:42,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:20:42,646 INFO L87 Difference]: Start difference. First operand 30093 states and 110401 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:43,931 INFO L93 Difference]: Finished difference Result 41368 states and 150030 transitions. [2022-01-28 15:20:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-28 15:20:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:44,044 INFO L225 Difference]: With dead ends: 41368 [2022-01-28 15:20:44,045 INFO L226 Difference]: Without dead ends: 41360 [2022-01-28 15:20:44,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=655, Invalid=2101, Unknown=0, NotChecked=0, Total=2756 [2022-01-28 15:20:44,046 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 374 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:44,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 288 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:44,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41360 states. [2022-01-28 15:20:44,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41360 to 30125. [2022-01-28 15:20:44,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30125 states, 30124 states have (on average 3.669632186960563) internal successors, (110544), 30124 states have internal predecessors, (110544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:44,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30125 states to 30125 states and 110544 transitions. [2022-01-28 15:20:44,943 INFO L78 Accepts]: Start accepts. Automaton has 30125 states and 110544 transitions. Word has length 23 [2022-01-28 15:20:44,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:44,943 INFO L470 AbstractCegarLoop]: Abstraction has 30125 states and 110544 transitions. [2022-01-28 15:20:44,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:44,943 INFO L276 IsEmpty]: Start isEmpty. Operand 30125 states and 110544 transitions. [2022-01-28 15:20:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:44,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:44,992 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:45,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-28 15:20:45,193 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,SelfDestructingSolverStorable49 [2022-01-28 15:20:45,193 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:45,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:45,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1796586428, now seen corresponding path program 15 times [2022-01-28 15:20:45,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:45,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423424069] [2022-01-28 15:20:45,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:45,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:45,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:45,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423424069] [2022-01-28 15:20:45,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423424069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:45,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969004805] [2022-01-28 15:20:45,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:20:45,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:45,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:45,243 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:45,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-28 15:20:45,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:20:45,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:45,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 15:20:45,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:45,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:45,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969004805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:45,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:45,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-01-28 15:20:45,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10974581] [2022-01-28 15:20:45,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:45,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:20:45,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:45,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:20:45,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:20:45,521 INFO L87 Difference]: Start difference. First operand 30125 states and 110544 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:47,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:47,401 INFO L93 Difference]: Finished difference Result 80166 states and 293367 transitions. [2022-01-28 15:20:47,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-28 15:20:47,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:47,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:47,720 INFO L225 Difference]: With dead ends: 80166 [2022-01-28 15:20:47,720 INFO L226 Difference]: Without dead ends: 80138 [2022-01-28 15:20:47,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=980, Invalid=2560, Unknown=0, NotChecked=0, Total=3540 [2022-01-28 15:20:47,721 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 409 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:47,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 269 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:20:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80138 states. [2022-01-28 15:20:49,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80138 to 48144. [2022-01-28 15:20:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48144 states, 48143 states have (on average 3.6833392185779865) internal successors, (177327), 48143 states have internal predecessors, (177327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48144 states to 48144 states and 177327 transitions. [2022-01-28 15:20:49,317 INFO L78 Accepts]: Start accepts. Automaton has 48144 states and 177327 transitions. Word has length 23 [2022-01-28 15:20:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:49,317 INFO L470 AbstractCegarLoop]: Abstraction has 48144 states and 177327 transitions. [2022-01-28 15:20:49,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 48144 states and 177327 transitions. [2022-01-28 15:20:49,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:49,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:49,576 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:49,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-28 15:20:49,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:49,792 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:49,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:49,792 INFO L85 PathProgramCache]: Analyzing trace with hash 99851866, now seen corresponding path program 16 times [2022-01-28 15:20:49,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:49,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474437467] [2022-01-28 15:20:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:49,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:49,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:49,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474437467] [2022-01-28 15:20:49,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474437467] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:49,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317071645] [2022-01-28 15:20:49,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:20:49,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:49,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:49,850 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:49,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-28 15:20:49,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:20:49,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:49,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 15:20:49,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:49,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:50,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317071645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:50,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:50,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-01-28 15:20:50,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433252142] [2022-01-28 15:20:50,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:50,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:20:50,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:50,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:20:50,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:20:50,100 INFO L87 Difference]: Start difference. First operand 48144 states and 177327 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:51,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:51,466 INFO L93 Difference]: Finished difference Result 68108 states and 248897 transitions. [2022-01-28 15:20:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-28 15:20:51,467 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:51,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:51,865 INFO L225 Difference]: With dead ends: 68108 [2022-01-28 15:20:51,865 INFO L226 Difference]: Without dead ends: 68088 [2022-01-28 15:20:51,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=656, Invalid=1696, Unknown=0, NotChecked=0, Total=2352 [2022-01-28 15:20:51,866 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 331 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:51,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 257 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:51,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68088 states. [2022-01-28 15:20:53,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68088 to 48138. [2022-01-28 15:20:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48138 states, 48137 states have (on average 3.683341296715624) internal successors, (177305), 48137 states have internal predecessors, (177305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:53,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48138 states to 48138 states and 177305 transitions. [2022-01-28 15:20:53,447 INFO L78 Accepts]: Start accepts. Automaton has 48138 states and 177305 transitions. Word has length 23 [2022-01-28 15:20:53,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:53,447 INFO L470 AbstractCegarLoop]: Abstraction has 48138 states and 177305 transitions. [2022-01-28 15:20:53,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:53,448 INFO L276 IsEmpty]: Start isEmpty. Operand 48138 states and 177305 transitions. [2022-01-28 15:20:53,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:53,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:53,539 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:53,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:53,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:53,742 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:53,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:53,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1945857750, now seen corresponding path program 15 times [2022-01-28 15:20:53,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:53,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580838926] [2022-01-28 15:20:53,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:53,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:53,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:53,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580838926] [2022-01-28 15:20:53,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580838926] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:53,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988224154] [2022-01-28 15:20:53,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:20:53,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:53,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:53,765 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:53,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-28 15:20:53,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:20:53,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:53,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:20:53,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:53,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:53,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988224154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:53,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:53,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-28 15:20:53,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978364872] [2022-01-28 15:20:53,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:53,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:20:53,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:53,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:20:53,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:20:53,969 INFO L87 Difference]: Start difference. First operand 48138 states and 177305 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:54,705 INFO L93 Difference]: Finished difference Result 50614 states and 184911 transitions. [2022-01-28 15:20:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-28 15:20:54,705 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 [2022-01-28 15:20:54,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:54,875 INFO L225 Difference]: With dead ends: 50614 [2022-01-28 15:20:54,875 INFO L226 Difference]: Without dead ends: 50558 [2022-01-28 15:20:54,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=536, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:20:54,876 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 290 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:54,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 121 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:20:54,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50558 states. [2022-01-28 15:20:55,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50558 to 48503. [2022-01-28 15:20:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48503 states, 48502 states have (on average 3.6827553502948334) internal successors, (178621), 48502 states have internal predecessors, (178621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:56,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48503 states to 48503 states and 178621 transitions. [2022-01-28 15:20:56,196 INFO L78 Accepts]: Start accepts. Automaton has 48503 states and 178621 transitions. Word has length 23 [2022-01-28 15:20:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:56,196 INFO L470 AbstractCegarLoop]: Abstraction has 48503 states and 178621 transitions. [2022-01-28 15:20:56,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:56,196 INFO L276 IsEmpty]: Start isEmpty. Operand 48503 states and 178621 transitions. [2022-01-28 15:20:56,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:56,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:56,418 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:56,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:56,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:56,619 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:56,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:56,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2072733398, now seen corresponding path program 16 times [2022-01-28 15:20:56,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:56,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160858602] [2022-01-28 15:20:56,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:56,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:56,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:56,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160858602] [2022-01-28 15:20:56,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160858602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:56,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148640181] [2022-01-28 15:20:56,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:20:56,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:56,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:56,642 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:56,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-28 15:20:56,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:20:56,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:56,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:20:56,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:56,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:56,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148640181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:56,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:56,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-28 15:20:56,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355007638] [2022-01-28 15:20:56,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:56,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:20:56,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:56,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:20:56,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:20:56,825 INFO L87 Difference]: Start difference. First operand 48503 states and 178621 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:57,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:57,557 INFO L93 Difference]: Finished difference Result 50084 states and 183527 transitions. [2022-01-28 15:20:57,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 15:20:57,557 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 [2022-01-28 15:20:57,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:57,744 INFO L225 Difference]: With dead ends: 50084 [2022-01-28 15:20:57,744 INFO L226 Difference]: Without dead ends: 50066 [2022-01-28 15:20:57,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:20:57,745 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 227 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:57,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 112 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:20:57,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50066 states. [2022-01-28 15:20:58,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50066 to 48412. [2022-01-28 15:20:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48412 states, 48411 states have (on average 3.683542996426432) internal successors, (178324), 48411 states have internal predecessors, (178324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48412 states to 48412 states and 178324 transitions. [2022-01-28 15:20:58,978 INFO L78 Accepts]: Start accepts. Automaton has 48412 states and 178324 transitions. Word has length 23 [2022-01-28 15:20:58,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:58,978 INFO L470 AbstractCegarLoop]: Abstraction has 48412 states and 178324 transitions. [2022-01-28 15:20:58,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:58,978 INFO L276 IsEmpty]: Start isEmpty. Operand 48412 states and 178324 transitions. [2022-01-28 15:20:59,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:59,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:59,262 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:59,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:59,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-01-28 15:20:59,479 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:20:59,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:59,480 INFO L85 PathProgramCache]: Analyzing trace with hash 385959470, now seen corresponding path program 17 times [2022-01-28 15:20:59,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:59,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691596301] [2022-01-28 15:20:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:59,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:59,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:59,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691596301] [2022-01-28 15:20:59,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691596301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:59,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080953402] [2022-01-28 15:20:59,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:20:59,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:59,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:59,510 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:20:59,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-28 15:20:59,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:20:59,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:59,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:20:59,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:59,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:59,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080953402] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:59,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:59,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-28 15:20:59,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267296018] [2022-01-28 15:20:59,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:59,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 15:20:59,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:59,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 15:20:59,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:20:59,698 INFO L87 Difference]: Start difference. First operand 48412 states and 178324 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:00,228 INFO L93 Difference]: Finished difference Result 49717 states and 182506 transitions. [2022-01-28 15:21:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 15:21:00,228 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:21:00,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:00,595 INFO L225 Difference]: With dead ends: 49717 [2022-01-28 15:21:00,595 INFO L226 Difference]: Without dead ends: 49632 [2022-01-28 15:21:00,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=457, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:21:00,596 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 192 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:00,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 60 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:21:00,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49632 states. [2022-01-28 15:21:01,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49632 to 48248. [2022-01-28 15:21:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48248 states, 48247 states have (on average 3.6853690384894398) internal successors, (177808), 48247 states have internal predecessors, (177808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:01,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48248 states to 48248 states and 177808 transitions. [2022-01-28 15:21:01,805 INFO L78 Accepts]: Start accepts. Automaton has 48248 states and 177808 transitions. Word has length 23 [2022-01-28 15:21:01,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:01,805 INFO L470 AbstractCegarLoop]: Abstraction has 48248 states and 177808 transitions. [2022-01-28 15:21:01,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:01,805 INFO L276 IsEmpty]: Start isEmpty. Operand 48248 states and 177808 transitions. [2022-01-28 15:21:01,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:21:01,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:01,867 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:01,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-28 15:21:02,068 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,SelfDestructingSolverStorable54 [2022-01-28 15:21:02,068 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:21:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:02,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1274385134, now seen corresponding path program 18 times [2022-01-28 15:21:02,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:02,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184271980] [2022-01-28 15:21:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:02,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:02,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:02,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184271980] [2022-01-28 15:21:02,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184271980] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:02,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401146738] [2022-01-28 15:21:02,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:21:02,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:02,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:02,096 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:21:02,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-28 15:21:02,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:21:02,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:21:02,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:21:02,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:02,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:02,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401146738] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:02,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:02,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-28 15:21:02,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506711925] [2022-01-28 15:21:02,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:02,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:21:02,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:02,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:21:02,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:21:02,481 INFO L87 Difference]: Start difference. First operand 48248 states and 177808 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:03,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:03,116 INFO L93 Difference]: Finished difference Result 50130 states and 183654 transitions. [2022-01-28 15:21:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 15:21:03,118 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 [2022-01-28 15:21:03,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:03,267 INFO L225 Difference]: With dead ends: 50130 [2022-01-28 15:21:03,267 INFO L226 Difference]: Without dead ends: 50090 [2022-01-28 15:21:03,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:21:03,268 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 219 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:03,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 122 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:21:03,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50090 states. [2022-01-28 15:21:04,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50090 to 48334. [2022-01-28 15:21:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48334 states, 48333 states have (on average 3.6854323133262987) internal successors, (178128), 48333 states have internal predecessors, (178128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:04,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48334 states to 48334 states and 178128 transitions. [2022-01-28 15:21:04,636 INFO L78 Accepts]: Start accepts. Automaton has 48334 states and 178128 transitions. Word has length 23 [2022-01-28 15:21:04,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:04,636 INFO L470 AbstractCegarLoop]: Abstraction has 48334 states and 178128 transitions. [2022-01-28 15:21:04,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:04,636 INFO L276 IsEmpty]: Start isEmpty. Operand 48334 states and 178128 transitions. [2022-01-28 15:21:04,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:21:04,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:04,698 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:04,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-28 15:21:04,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-28 15:21:04,899 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:21:04,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:04,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1147509486, now seen corresponding path program 19 times [2022-01-28 15:21:04,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:04,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610148375] [2022-01-28 15:21:04,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:04,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:04,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:04,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610148375] [2022-01-28 15:21:04,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610148375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:04,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175932936] [2022-01-28 15:21:04,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:21:04,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:04,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:04,923 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:21:04,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-28 15:21:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:04,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:21:04,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:05,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:05,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175932936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:05,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:05,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-28 15:21:05,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641321826] [2022-01-28 15:21:05,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:05,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:21:05,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:05,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:21:05,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:21:05,114 INFO L87 Difference]: Start difference. First operand 48334 states and 178128 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:05,854 INFO L93 Difference]: Finished difference Result 49648 states and 182402 transitions. [2022-01-28 15:21:05,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 15:21:05,855 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 [2022-01-28 15:21:05,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:06,033 INFO L225 Difference]: With dead ends: 49648 [2022-01-28 15:21:06,033 INFO L226 Difference]: Without dead ends: 49635 [2022-01-28 15:21:06,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:21:06,033 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 170 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:06,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 92 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:21:06,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49635 states. [2022-01-28 15:21:07,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49635 to 48328. [2022-01-28 15:21:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48328 states, 48327 states have (on average 3.6853104889606225) internal successors, (178100), 48327 states have internal predecessors, (178100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48328 states to 48328 states and 178100 transitions. [2022-01-28 15:21:07,300 INFO L78 Accepts]: Start accepts. Automaton has 48328 states and 178100 transitions. Word has length 23 [2022-01-28 15:21:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:07,300 INFO L470 AbstractCegarLoop]: Abstraction has 48328 states and 178100 transitions. [2022-01-28 15:21:07,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 48328 states and 178100 transitions. [2022-01-28 15:21:07,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:21:07,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:07,370 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:07,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-28 15:21:07,570 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,SelfDestructingSolverStorable56 [2022-01-28 15:21:07,571 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:21:07,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:07,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1508650798, now seen corresponding path program 20 times [2022-01-28 15:21:07,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:07,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006997447] [2022-01-28 15:21:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:07,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:07,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:07,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006997447] [2022-01-28 15:21:07,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006997447] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:07,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115357851] [2022-01-28 15:21:07,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:21:07,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:07,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:07,596 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:21:07,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-28 15:21:07,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:21:07,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:21:07,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:21:07,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:07,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:08,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115357851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:08,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:08,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-28 15:21:08,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472672859] [2022-01-28 15:21:08,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:08,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:21:08,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:08,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:21:08,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:21:08,003 INFO L87 Difference]: Start difference. First operand 48328 states and 178100 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:08,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:08,577 INFO L93 Difference]: Finished difference Result 49856 states and 182949 transitions. [2022-01-28 15:21:08,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 15:21:08,577 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:21:08,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:08,731 INFO L225 Difference]: With dead ends: 49856 [2022-01-28 15:21:08,731 INFO L226 Difference]: Without dead ends: 49856 [2022-01-28 15:21:08,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=296, Invalid=634, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:21:08,732 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:08,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 131 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:21:08,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49856 states. [2022-01-28 15:21:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49856 to 48324. [2022-01-28 15:21:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48324 states, 48323 states have (on average 3.684539453262422) internal successors, (178048), 48323 states have internal predecessors, (178048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48324 states to 48324 states and 178048 transitions. [2022-01-28 15:21:10,051 INFO L78 Accepts]: Start accepts. Automaton has 48324 states and 178048 transitions. Word has length 23 [2022-01-28 15:21:10,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:10,051 INFO L470 AbstractCegarLoop]: Abstraction has 48324 states and 178048 transitions. [2022-01-28 15:21:10,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:10,052 INFO L276 IsEmpty]: Start isEmpty. Operand 48324 states and 178048 transitions. [2022-01-28 15:21:10,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:21:10,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:10,135 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:10,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-28 15:21:10,346 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,SelfDestructingSolverStorable57 [2022-01-28 15:21:10,347 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:21:10,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:10,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2041659458, now seen corresponding path program 17 times [2022-01-28 15:21:10,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:10,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464842829] [2022-01-28 15:21:10,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:10,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:10,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:10,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464842829] [2022-01-28 15:21:10,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464842829] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:10,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035296768] [2022-01-28 15:21:10,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:21:10,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:10,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:10,428 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:21:10,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-28 15:21:10,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 15:21:10,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:21:10,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:21:10,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:10,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:10,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035296768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:10,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:10,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-28 15:21:10,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229731312] [2022-01-28 15:21:10,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:10,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:21:10,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:10,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:21:10,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:21:10,860 INFO L87 Difference]: Start difference. First operand 48324 states and 178048 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:13,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:13,148 INFO L93 Difference]: Finished difference Result 70922 states and 259322 transitions. [2022-01-28 15:21:13,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-28 15:21:13,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:21:13,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:13,411 INFO L225 Difference]: With dead ends: 70922 [2022-01-28 15:21:13,411 INFO L226 Difference]: Without dead ends: 70540 [2022-01-28 15:21:13,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=792, Invalid=2990, Unknown=0, NotChecked=0, Total=3782 [2022-01-28 15:21:13,412 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 395 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:13,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 227 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:21:13,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70540 states. [2022-01-28 15:21:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70540 to 51438. [2022-01-28 15:21:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51438 states, 51437 states have (on average 3.6920310282481483) internal successors, (189907), 51437 states have internal predecessors, (189907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:15,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51438 states to 51438 states and 189907 transitions. [2022-01-28 15:21:15,098 INFO L78 Accepts]: Start accepts. Automaton has 51438 states and 189907 transitions. Word has length 23 [2022-01-28 15:21:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:15,099 INFO L470 AbstractCegarLoop]: Abstraction has 51438 states and 189907 transitions. [2022-01-28 15:21:15,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 51438 states and 189907 transitions. [2022-01-28 15:21:15,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:21:15,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:15,209 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:15,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-28 15:21:15,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-28 15:21:15,423 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:21:15,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:15,424 INFO L85 PathProgramCache]: Analyzing trace with hash 498900542, now seen corresponding path program 18 times [2022-01-28 15:21:15,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:15,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640780343] [2022-01-28 15:21:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:15,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:15,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:15,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640780343] [2022-01-28 15:21:15,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640780343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:15,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484373592] [2022-01-28 15:21:15,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:21:15,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:15,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:15,522 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:21:15,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:21:15,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:21:15,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:21:15,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:15,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-28 15:21:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:15,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:15,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484373592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:15,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:15,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-28 15:21:15,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507750442] [2022-01-28 15:21:15,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:15,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:21:15,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:15,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:21:15,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:21:15,949 INFO L87 Difference]: Start difference. First operand 51438 states and 189907 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:19,232 INFO L93 Difference]: Finished difference Result 62653 states and 228416 transitions. [2022-01-28 15:21:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-28 15:21:19,233 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-01-28 15:21:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:19,443 INFO L225 Difference]: With dead ends: 62653 [2022-01-28 15:21:19,443 INFO L226 Difference]: Without dead ends: 62310 [2022-01-28 15:21:19,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2047 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1552, Invalid=4768, Unknown=0, NotChecked=0, Total=6320 [2022-01-28 15:21:19,444 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 381 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:19,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 411 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 15:21:19,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62310 states. [2022-01-28 15:21:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62310 to 51391. [2022-01-28 15:21:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51391 states, 51390 states have (on average 3.692294220665499) internal successors, (189747), 51390 states have internal predecessors, (189747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:20,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51391 states to 51391 states and 189747 transitions. [2022-01-28 15:21:20,877 INFO L78 Accepts]: Start accepts. Automaton has 51391 states and 189747 transitions. Word has length 23 [2022-01-28 15:21:20,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:20,877 INFO L470 AbstractCegarLoop]: Abstraction has 51391 states and 189747 transitions. [2022-01-28 15:21:20,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:20,877 INFO L276 IsEmpty]: Start isEmpty. Operand 51391 states and 189747 transitions. [2022-01-28 15:21:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:21:21,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:21,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:21,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-28 15:21:21,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:21,370 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:21:21,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:21,370 INFO L85 PathProgramCache]: Analyzing trace with hash -763955714, now seen corresponding path program 19 times [2022-01-28 15:21:21,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:21,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892446477] [2022-01-28 15:21:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:21,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:21,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:21,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892446477] [2022-01-28 15:21:21,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892446477] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:21,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264082227] [2022-01-28 15:21:21,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:21:21,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:21,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:21,462 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:21:21,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-28 15:21:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:21,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:21:21,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:21,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:21,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264082227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:21,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:21,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-28 15:21:21,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879755408] [2022-01-28 15:21:21,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:21,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:21:21,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:21,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:21:21,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:21:21,891 INFO L87 Difference]: Start difference. First operand 51391 states and 189747 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:24,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:24,310 INFO L93 Difference]: Finished difference Result 60404 states and 220252 transitions. [2022-01-28 15:21:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-28 15:21:24,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:21:24,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:24,497 INFO L225 Difference]: With dead ends: 60404 [2022-01-28 15:21:24,497 INFO L226 Difference]: Without dead ends: 59819 [2022-01-28 15:21:24,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=871, Invalid=3035, Unknown=0, NotChecked=0, Total=3906 [2022-01-28 15:21:24,498 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 326 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:24,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 418 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 15:21:24,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59819 states. [2022-01-28 15:21:25,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59819 to 52523. [2022-01-28 15:21:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52523 states, 52522 states have (on average 3.6943376109059063) internal successors, (194034), 52522 states have internal predecessors, (194034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52523 states to 52523 states and 194034 transitions. [2022-01-28 15:21:25,993 INFO L78 Accepts]: Start accepts. Automaton has 52523 states and 194034 transitions. Word has length 23 [2022-01-28 15:21:25,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:25,993 INFO L470 AbstractCegarLoop]: Abstraction has 52523 states and 194034 transitions. [2022-01-28 15:21:25,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 52523 states and 194034 transitions. [2022-01-28 15:21:26,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:21:26,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:26,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:26,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-28 15:21:26,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:26,267 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:21:26,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:26,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1823119584, now seen corresponding path program 20 times [2022-01-28 15:21:26,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:26,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842843155] [2022-01-28 15:21:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:26,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:26,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:26,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842843155] [2022-01-28 15:21:26,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842843155] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:26,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425342931] [2022-01-28 15:21:26,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:21:26,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:26,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:26,380 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:21:26,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-28 15:21:26,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:21:26,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:21:26,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:21:26,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:26,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:26,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425342931] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:26,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:26,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-28 15:21:26,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692671192] [2022-01-28 15:21:26,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:26,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:21:26,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:26,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:21:26,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:21:26,808 INFO L87 Difference]: Start difference. First operand 52523 states and 194034 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:28,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:28,864 INFO L93 Difference]: Finished difference Result 69893 states and 256293 transitions. [2022-01-28 15:21:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-28 15:21:28,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:21:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:29,112 INFO L225 Difference]: With dead ends: 69893 [2022-01-28 15:21:29,113 INFO L226 Difference]: Without dead ends: 69722 [2022-01-28 15:21:29,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=501, Invalid=2361, Unknown=0, NotChecked=0, Total=2862 [2022-01-28 15:21:29,113 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 248 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:29,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 307 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:21:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69722 states. [2022-01-28 15:21:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69722 to 52515. [2022-01-28 15:21:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52515 states, 52514 states have (on average 3.694024450622691) internal successors, (193988), 52514 states have internal predecessors, (193988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52515 states to 52515 states and 193988 transitions. [2022-01-28 15:21:30,719 INFO L78 Accepts]: Start accepts. Automaton has 52515 states and 193988 transitions. Word has length 23 [2022-01-28 15:21:30,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:30,719 INFO L470 AbstractCegarLoop]: Abstraction has 52515 states and 193988 transitions. [2022-01-28 15:21:30,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:30,719 INFO L276 IsEmpty]: Start isEmpty. Operand 52515 states and 193988 transitions. [2022-01-28 15:21:30,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:21:30,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:30,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:30,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-28 15:21:30,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:30,993 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:21:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:30,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1052604350, now seen corresponding path program 21 times [2022-01-28 15:21:30,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:30,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368039087] [2022-01-28 15:21:30,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:30,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:31,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:31,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368039087] [2022-01-28 15:21:31,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368039087] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:31,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064246632] [2022-01-28 15:21:31,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:21:31,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:31,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:31,074 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:21:31,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-28 15:21:31,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:21:31,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:21:31,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:21:31,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:31,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:31,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064246632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:31,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:31,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-28 15:21:31,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136944144] [2022-01-28 15:21:31,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:31,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:21:31,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:31,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:21:31,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:21:31,450 INFO L87 Difference]: Start difference. First operand 52515 states and 193988 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:33,723 INFO L93 Difference]: Finished difference Result 70706 states and 260219 transitions. [2022-01-28 15:21:33,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-28 15:21:33,724 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:21:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:33,971 INFO L225 Difference]: With dead ends: 70706 [2022-01-28 15:21:33,971 INFO L226 Difference]: Without dead ends: 70369 [2022-01-28 15:21:33,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=768, Invalid=2312, Unknown=0, NotChecked=0, Total=3080 [2022-01-28 15:21:33,972 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 304 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:33,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 259 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:21:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70369 states. [2022-01-28 15:21:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70369 to 53529. [2022-01-28 15:21:35,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53529 states, 53528 states have (on average 3.698438200567927) internal successors, (197970), 53528 states have internal predecessors, (197970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:35,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53529 states to 53529 states and 197970 transitions. [2022-01-28 15:21:35,506 INFO L78 Accepts]: Start accepts. Automaton has 53529 states and 197970 transitions. Word has length 23 [2022-01-28 15:21:35,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:35,506 INFO L470 AbstractCegarLoop]: Abstraction has 53529 states and 197970 transitions. [2022-01-28 15:21:35,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:35,506 INFO L276 IsEmpty]: Start isEmpty. Operand 53529 states and 197970 transitions. [2022-01-28 15:21:35,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:21:35,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:35,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:35,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-28 15:21:36,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-01-28 15:21:36,018 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:21:36,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:36,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2111768220, now seen corresponding path program 22 times [2022-01-28 15:21:36,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:36,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015727016] [2022-01-28 15:21:36,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:36,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:36,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:36,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015727016] [2022-01-28 15:21:36,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015727016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:36,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115970193] [2022-01-28 15:21:36,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:21:36,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:36,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:36,112 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:21:36,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-28 15:21:36,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:21:36,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:21:36,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:21:36,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:36,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:36,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115970193] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:36,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:36,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-28 15:21:36,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496440634] [2022-01-28 15:21:36,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:36,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:21:36,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:36,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:21:36,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:21:36,570 INFO L87 Difference]: Start difference. First operand 53529 states and 197970 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:38,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:38,165 INFO L93 Difference]: Finished difference Result 78186 states and 289474 transitions. [2022-01-28 15:21:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-28 15:21:38,166 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:21:38,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:38,442 INFO L225 Difference]: With dead ends: 78186 [2022-01-28 15:21:38,442 INFO L226 Difference]: Without dead ends: 78084 [2022-01-28 15:21:38,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2022-01-28 15:21:38,442 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 252 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:38,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 161 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:21:38,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78084 states. [2022-01-28 15:21:39,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78084 to 53521. [2022-01-28 15:21:39,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53521 states, 53520 states have (on average 3.69839312406577) internal successors, (197938), 53520 states have internal predecessors, (197938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53521 states to 53521 states and 197938 transitions. [2022-01-28 15:21:40,158 INFO L78 Accepts]: Start accepts. Automaton has 53521 states and 197938 transitions. Word has length 23 [2022-01-28 15:21:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:40,159 INFO L470 AbstractCegarLoop]: Abstraction has 53521 states and 197938 transitions. [2022-01-28 15:21:40,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 53521 states and 197938 transitions. [2022-01-28 15:21:40,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:21:40,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:40,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:40,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-28 15:21:40,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-01-28 15:21:40,437 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:21:40,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:40,437 INFO L85 PathProgramCache]: Analyzing trace with hash 365651024, now seen corresponding path program 23 times [2022-01-28 15:21:40,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:40,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134382093] [2022-01-28 15:21:40,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:40,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:21:40,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:40,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134382093] [2022-01-28 15:21:40,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134382093] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:40,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541961028] [2022-01-28 15:21:40,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:21:40,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:40,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:40,488 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:21:40,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-28 15:21:40,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:21:40,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:21:40,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 15:21:40,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:21:40,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:40,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541961028] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:40,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:40,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-28 15:21:40,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222008141] [2022-01-28 15:21:40,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:40,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:21:40,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:40,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:21:40,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:21:40,708 INFO L87 Difference]: Start difference. First operand 53521 states and 197938 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:42,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:42,025 INFO L93 Difference]: Finished difference Result 92675 states and 340801 transitions. [2022-01-28 15:21:42,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-28 15:21:42,026 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:21:42,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:42,408 INFO L225 Difference]: With dead ends: 92675 [2022-01-28 15:21:42,408 INFO L226 Difference]: Without dead ends: 92675 [2022-01-28 15:21:42,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=1509, Unknown=0, NotChecked=0, Total=2070 [2022-01-28 15:21:42,409 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 248 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:42,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 156 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:21:42,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92675 states. [2022-01-28 15:21:44,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92675 to 71533. [2022-01-28 15:21:44,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71533 states, 71532 states have (on average 3.7146871330313704) internal successors, (265719), 71532 states have internal predecessors, (265719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:44,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71533 states to 71533 states and 265719 transitions. [2022-01-28 15:21:44,633 INFO L78 Accepts]: Start accepts. Automaton has 71533 states and 265719 transitions. Word has length 23 [2022-01-28 15:21:44,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:44,633 INFO L470 AbstractCegarLoop]: Abstraction has 71533 states and 265719 transitions. [2022-01-28 15:21:44,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:44,633 INFO L276 IsEmpty]: Start isEmpty. Operand 71533 states and 265719 transitions. [2022-01-28 15:21:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:21:44,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:44,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:44,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-28 15:21:44,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:44,931 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:21:44,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:44,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1122420986, now seen corresponding path program 24 times [2022-01-28 15:21:44,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:44,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533242542] [2022-01-28 15:21:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:44,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:45,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:45,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533242542] [2022-01-28 15:21:45,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533242542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:45,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156130269] [2022-01-28 15:21:45,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:21:45,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:45,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:45,030 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:21:45,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-28 15:21:45,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:21:45,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:21:45,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:21:45,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:45,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:45,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156130269] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:45,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:45,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-28 15:21:45,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706989176] [2022-01-28 15:21:45,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:45,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:21:45,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:45,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:21:45,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:21:45,464 INFO L87 Difference]: Start difference. First operand 71533 states and 265719 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:46,981 INFO L93 Difference]: Finished difference Result 88143 states and 326647 transitions. [2022-01-28 15:21:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 15:21:46,981 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:21:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:47,496 INFO L225 Difference]: With dead ends: 88143 [2022-01-28 15:21:47,496 INFO L226 Difference]: Without dead ends: 87923 [2022-01-28 15:21:47,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 15:21:47,496 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 201 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:47,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 146 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:21:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87923 states. [2022-01-28 15:21:49,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87923 to 72567. [2022-01-28 15:21:49,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72567 states, 72566 states have (on average 3.7213984510652374) internal successors, (270047), 72566 states have internal predecessors, (270047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72567 states to 72567 states and 270047 transitions. [2022-01-28 15:21:49,556 INFO L78 Accepts]: Start accepts. Automaton has 72567 states and 270047 transitions. Word has length 23 [2022-01-28 15:21:49,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:49,556 INFO L470 AbstractCegarLoop]: Abstraction has 72567 states and 270047 transitions. [2022-01-28 15:21:49,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 72567 states and 270047 transitions. [2022-01-28 15:21:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:21:49,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:49,658 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:49,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-28 15:21:49,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:49,859 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:21:49,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:49,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1254398970, now seen corresponding path program 17 times [2022-01-28 15:21:49,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:49,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911507670] [2022-01-28 15:21:49,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:49,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:49,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:49,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911507670] [2022-01-28 15:21:49,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911507670] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:49,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649172990] [2022-01-28 15:21:49,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:21:49,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:49,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:49,928 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:21:49,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-28 15:21:49,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:21:49,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:21:49,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-28 15:21:49,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:21:50,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:21:50,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649172990] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:50,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:50,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-01-28 15:21:50,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901255458] [2022-01-28 15:21:50,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:50,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:21:50,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:50,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:21:50,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:21:50,152 INFO L87 Difference]: Start difference. First operand 72567 states and 270047 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:50,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:50,916 INFO L93 Difference]: Finished difference Result 73015 states and 271358 transitions. [2022-01-28 15:21:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:21:50,917 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:21:50,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:51,199 INFO L225 Difference]: With dead ends: 73015 [2022-01-28 15:21:51,199 INFO L226 Difference]: Without dead ends: 72942 [2022-01-28 15:21:51,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:21:51,200 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:51,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 223 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:21:51,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72942 states. [2022-01-28 15:21:52,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72942 to 72397. [2022-01-28 15:21:52,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72397 states, 72396 states have (on average 3.7211310017128016) internal successors, (269395), 72396 states have internal predecessors, (269395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:53,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72397 states to 72397 states and 269395 transitions. [2022-01-28 15:21:53,067 INFO L78 Accepts]: Start accepts. Automaton has 72397 states and 269395 transitions. Word has length 23 [2022-01-28 15:21:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:53,067 INFO L470 AbstractCegarLoop]: Abstraction has 72397 states and 269395 transitions. [2022-01-28 15:21:53,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:53,068 INFO L276 IsEmpty]: Start isEmpty. Operand 72397 states and 269395 transitions. [2022-01-28 15:21:53,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:21:53,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:53,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:53,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-28 15:21:53,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-28 15:21:53,385 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:21:53,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:53,386 INFO L85 PathProgramCache]: Analyzing trace with hash -97569618, now seen corresponding path program 18 times [2022-01-28 15:21:53,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:53,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581814055] [2022-01-28 15:21:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:53,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:21:53,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:53,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581814055] [2022-01-28 15:21:53,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581814055] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:53,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743042176] [2022-01-28 15:21:53,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:21:53,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:53,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:53,441 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:21:53,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-28 15:21:53,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:21:53,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:21:53,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-28 15:21:53,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 15:21:53,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 15:21:53,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743042176] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:53,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:53,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 10 [2022-01-28 15:21:53,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412998915] [2022-01-28 15:21:53,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:53,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 15:21:53,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:53,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 15:21:53,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:21:53,955 INFO L87 Difference]: Start difference. First operand 72397 states and 269395 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:54,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:54,481 INFO L93 Difference]: Finished difference Result 73615 states and 273337 transitions. [2022-01-28 15:21:54,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:21:54,481 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:21:54,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:54,957 INFO L225 Difference]: With dead ends: 73615 [2022-01-28 15:21:54,957 INFO L226 Difference]: Without dead ends: 73496 [2022-01-28 15:21:54,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:21:54,957 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 65 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:54,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 215 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:21:55,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73496 states. [2022-01-28 15:21:56,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73496 to 73017. [2022-01-28 15:21:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73017 states, 73016 states have (on average 3.7191026624301524) internal successors, (271554), 73016 states have internal predecessors, (271554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73017 states to 73017 states and 271554 transitions. [2022-01-28 15:21:56,941 INFO L78 Accepts]: Start accepts. Automaton has 73017 states and 271554 transitions. Word has length 23 [2022-01-28 15:21:56,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:56,941 INFO L470 AbstractCegarLoop]: Abstraction has 73017 states and 271554 transitions. [2022-01-28 15:21:56,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 73017 states and 271554 transitions. [2022-01-28 15:21:57,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:21:57,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:57,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:57,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-28 15:21:57,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-28 15:21:57,258 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:21:57,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:57,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1949809626, now seen corresponding path program 19 times [2022-01-28 15:21:57,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:57,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904425904] [2022-01-28 15:21:57,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:57,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:57,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:57,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904425904] [2022-01-28 15:21:57,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904425904] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:57,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60750882] [2022-01-28 15:21:57,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:21:57,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:57,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:57,333 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:21:57,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-28 15:21:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:57,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-28 15:21:57,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:21:57,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:21:57,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60750882] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:57,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:57,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-01-28 15:21:57,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376432313] [2022-01-28 15:21:57,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:57,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 15:21:57,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:57,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 15:21:57,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:21:57,568 INFO L87 Difference]: Start difference. First operand 73017 states and 271554 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:58,347 INFO L93 Difference]: Finished difference Result 74066 states and 274724 transitions. [2022-01-28 15:21:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:21:58,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:21:58,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:58,836 INFO L225 Difference]: With dead ends: 74066 [2022-01-28 15:21:58,837 INFO L226 Difference]: Without dead ends: 73920 [2022-01-28 15:21:58,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:21:58,838 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 54 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:58,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 277 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:21:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73920 states. [2022-01-28 15:22:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73920 to 73296. [2022-01-28 15:22:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73296 states, 73295 states have (on average 3.7190804284057575) internal successors, (272590), 73295 states have internal predecessors, (272590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73296 states to 73296 states and 272590 transitions. [2022-01-28 15:22:00,902 INFO L78 Accepts]: Start accepts. Automaton has 73296 states and 272590 transitions. Word has length 23 [2022-01-28 15:22:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:22:00,902 INFO L470 AbstractCegarLoop]: Abstraction has 73296 states and 272590 transitions. [2022-01-28 15:22:00,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 73296 states and 272590 transitions. [2022-01-28 15:22:01,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:22:01,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:22:01,018 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:22:01,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-28 15:22:01,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:01,218 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:22:01,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:22:01,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1845249086, now seen corresponding path program 20 times [2022-01-28 15:22:01,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:22:01,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615019845] [2022-01-28 15:22:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:22:01,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:22:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:22:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:01,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:22:01,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615019845] [2022-01-28 15:22:01,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615019845] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:22:01,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947683196] [2022-01-28 15:22:01,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:22:01,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:01,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:22:01,299 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:22:01,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-28 15:22:01,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:22:01,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:22:01,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-28 15:22:01,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:22:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:22:01,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:22:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:22:01,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947683196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:22:01,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:22:01,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-01-28 15:22:01,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046191691] [2022-01-28 15:22:01,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:22:01,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:22:01,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:22:01,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:22:01,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:22:01,547 INFO L87 Difference]: Start difference. First operand 73296 states and 272590 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:22:02,387 INFO L93 Difference]: Finished difference Result 74153 states and 275318 transitions. [2022-01-28 15:22:02,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:22:02,387 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:22:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:22:02,665 INFO L225 Difference]: With dead ends: 74153 [2022-01-28 15:22:02,665 INFO L226 Difference]: Without dead ends: 74056 [2022-01-28 15:22:02,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:22:02,665 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 77 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:22:02,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 310 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:22:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74056 states. [2022-01-28 15:22:04,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74056 to 73718. [2022-01-28 15:22:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73718 states, 73717 states have (on average 3.7172294043436387) internal successors, (274023), 73717 states have internal predecessors, (274023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:04,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73718 states to 73718 states and 274023 transitions. [2022-01-28 15:22:04,605 INFO L78 Accepts]: Start accepts. Automaton has 73718 states and 274023 transitions. Word has length 23 [2022-01-28 15:22:04,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:22:04,606 INFO L470 AbstractCegarLoop]: Abstraction has 73718 states and 274023 transitions. [2022-01-28 15:22:04,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:04,606 INFO L276 IsEmpty]: Start isEmpty. Operand 73718 states and 274023 transitions. [2022-01-28 15:22:04,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:22:04,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:22:04,709 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:22:04,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-28 15:22:04,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-28 15:22:04,923 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:22:04,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:22:04,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1982895082, now seen corresponding path program 21 times [2022-01-28 15:22:04,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:22:04,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325816939] [2022-01-28 15:22:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:22:04,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:22:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:22:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:04,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:22:04,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325816939] [2022-01-28 15:22:04,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325816939] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:22:04,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443229382] [2022-01-28 15:22:04,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:22:04,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:04,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:22:04,988 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:22:04,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-28 15:22:05,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:22:05,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:22:05,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-28 15:22:05,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:22:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:22:05,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:22:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:22:05,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443229382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:22:05,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:22:05,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-01-28 15:22:05,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026387813] [2022-01-28 15:22:05,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:22:05,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:22:05,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:22:05,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:22:05,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:22:05,120 INFO L87 Difference]: Start difference. First operand 73718 states and 274023 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:05,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:22:05,896 INFO L93 Difference]: Finished difference Result 74637 states and 276632 transitions. [2022-01-28 15:22:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:22:05,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:22:05,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:22:06,179 INFO L225 Difference]: With dead ends: 74637 [2022-01-28 15:22:06,179 INFO L226 Difference]: Without dead ends: 74576 [2022-01-28 15:22:06,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:22:06,179 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 93 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:22:06,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 232 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:22:06,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74576 states. [2022-01-28 15:22:07,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74576 to 74026. [2022-01-28 15:22:07,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74026 states, 74025 states have (on average 3.715758189800743) internal successors, (275059), 74025 states have internal predecessors, (275059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74026 states to 74026 states and 275059 transitions. [2022-01-28 15:22:08,109 INFO L78 Accepts]: Start accepts. Automaton has 74026 states and 275059 transitions. Word has length 23 [2022-01-28 15:22:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:22:08,109 INFO L470 AbstractCegarLoop]: Abstraction has 74026 states and 275059 transitions. [2022-01-28 15:22:08,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand 74026 states and 275059 transitions. [2022-01-28 15:22:08,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:22:08,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:22:08,225 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:22:08,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-28 15:22:08,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:08,426 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:22:08,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:22:08,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1186532844, now seen corresponding path program 22 times [2022-01-28 15:22:08,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:22:08,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161055897] [2022-01-28 15:22:08,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:22:08,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:22:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:22:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:08,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:22:08,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161055897] [2022-01-28 15:22:08,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161055897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:22:08,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104095151] [2022-01-28 15:22:08,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:22:08,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:08,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:22:08,799 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:22:08,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-28 15:22:08,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:22:08,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:22:08,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-28 15:22:08,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:22:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:08,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:22:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:08,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104095151] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:22:08,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:22:08,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-01-28 15:22:08,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84505539] [2022-01-28 15:22:08,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:22:08,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:22:08,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:22:08,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:22:08,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:22:08,986 INFO L87 Difference]: Start difference. First operand 74026 states and 275059 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:09,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:22:09,510 INFO L93 Difference]: Finished difference Result 74948 states and 277864 transitions. [2022-01-28 15:22:09,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:22:09,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:22:09,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:22:09,999 INFO L225 Difference]: With dead ends: 74948 [2022-01-28 15:22:09,999 INFO L226 Difference]: Without dead ends: 74890 [2022-01-28 15:22:09,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:22:10,000 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:22:10,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 301 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:22:10,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74890 states. [2022-01-28 15:22:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74890 to 74435. [2022-01-28 15:22:11,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74435 states, 74434 states have (on average 3.7147271408227422) internal successors, (276502), 74434 states have internal predecessors, (276502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74435 states to 74435 states and 276502 transitions. [2022-01-28 15:22:11,918 INFO L78 Accepts]: Start accepts. Automaton has 74435 states and 276502 transitions. Word has length 23 [2022-01-28 15:22:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:22:11,918 INFO L470 AbstractCegarLoop]: Abstraction has 74435 states and 276502 transitions. [2022-01-28 15:22:11,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 74435 states and 276502 transitions. [2022-01-28 15:22:12,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:22:12,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:22:12,051 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:22:12,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-28 15:22:12,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:12,263 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:22:12,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:22:12,264 INFO L85 PathProgramCache]: Analyzing trace with hash 786212196, now seen corresponding path program 25 times [2022-01-28 15:22:12,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:22:12,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959633746] [2022-01-28 15:22:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:22:12,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:22:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:22:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:12,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:22:12,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959633746] [2022-01-28 15:22:12,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959633746] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:22:12,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252036315] [2022-01-28 15:22:12,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:22:12,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:12,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:22:12,358 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:22:12,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-28 15:22:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:22:12,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-28 15:22:12,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:22:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:12,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:22:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:12,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252036315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:22:12,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:22:12,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-28 15:22:12,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930774269] [2022-01-28 15:22:12,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:22:12,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:22:12,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:22:12,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:22:12,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:22:12,614 INFO L87 Difference]: Start difference. First operand 74435 states and 276502 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:13,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:22:13,539 INFO L93 Difference]: Finished difference Result 75766 states and 280447 transitions. [2022-01-28 15:22:13,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:22:13,540 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:22:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:22:13,815 INFO L225 Difference]: With dead ends: 75766 [2022-01-28 15:22:13,815 INFO L226 Difference]: Without dead ends: 75720 [2022-01-28 15:22:13,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:22:13,815 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 111 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:22:13,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 458 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:22:13,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75720 states. [2022-01-28 15:22:15,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75720 to 75027. [2022-01-28 15:22:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75027 states, 75026 states have (on average 3.712859542025431) internal successors, (278561), 75026 states have internal predecessors, (278561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:15,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75027 states to 75027 states and 278561 transitions. [2022-01-28 15:22:15,790 INFO L78 Accepts]: Start accepts. Automaton has 75027 states and 278561 transitions. Word has length 25 [2022-01-28 15:22:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:22:15,790 INFO L470 AbstractCegarLoop]: Abstraction has 75027 states and 278561 transitions. [2022-01-28 15:22:15,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 75027 states and 278561 transitions. [2022-01-28 15:22:15,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:22:15,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:22:15,913 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:22:15,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-28 15:22:16,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-01-28 15:22:16,113 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:22:16,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:22:16,113 INFO L85 PathProgramCache]: Analyzing trace with hash -94226864, now seen corresponding path program 26 times [2022-01-28 15:22:16,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:22:16,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265319482] [2022-01-28 15:22:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:22:16,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:22:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:22:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:16,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:22:16,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265319482] [2022-01-28 15:22:16,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265319482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:22:16,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479534318] [2022-01-28 15:22:16,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:22:16,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:16,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:22:16,189 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:22:16,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-28 15:22:16,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:22:16,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:22:16,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-28 15:22:16,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:22:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:16,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:22:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:16,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479534318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:22:16,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:22:16,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-28 15:22:16,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151336074] [2022-01-28 15:22:16,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:22:16,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:22:16,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:22:16,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:22:16,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:22:16,430 INFO L87 Difference]: Start difference. First operand 75027 states and 278561 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:17,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:22:17,280 INFO L93 Difference]: Finished difference Result 76614 states and 283618 transitions. [2022-01-28 15:22:17,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:22:17,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:22:17,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:22:17,543 INFO L225 Difference]: With dead ends: 76614 [2022-01-28 15:22:17,543 INFO L226 Difference]: Without dead ends: 76547 [2022-01-28 15:22:17,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:22:17,543 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 120 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:22:17,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 348 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:22:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76547 states. [2022-01-28 15:22:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76547 to 75714. [2022-01-28 15:22:19,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75714 states, 75713 states have (on average 3.7111460383289527) internal successors, (280982), 75713 states have internal predecessors, (280982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:19,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75714 states to 75714 states and 280982 transitions. [2022-01-28 15:22:19,457 INFO L78 Accepts]: Start accepts. Automaton has 75714 states and 280982 transitions. Word has length 25 [2022-01-28 15:22:19,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:22:19,457 INFO L470 AbstractCegarLoop]: Abstraction has 75714 states and 280982 transitions. [2022-01-28 15:22:19,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:19,457 INFO L276 IsEmpty]: Start isEmpty. Operand 75714 states and 280982 transitions. [2022-01-28 15:22:19,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:22:19,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:22:19,838 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:22:19,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-28 15:22:20,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:20,039 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:22:20,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:22:20,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1627658808, now seen corresponding path program 27 times [2022-01-28 15:22:20,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:22:20,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870532298] [2022-01-28 15:22:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:22:20,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:22:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:22:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:20,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:22:20,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870532298] [2022-01-28 15:22:20,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870532298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:22:20,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054050889] [2022-01-28 15:22:20,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:22:20,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:20,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:22:20,117 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:22:20,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-28 15:22:20,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 15:22:20,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:22:20,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-28 15:22:20,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:22:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:20,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:22:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:20,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054050889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:22:20,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:22:20,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2022-01-28 15:22:20,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41102351] [2022-01-28 15:22:20,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:22:20,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:22:20,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:22:20,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:22:20,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:22:20,297 INFO L87 Difference]: Start difference. First operand 75714 states and 280982 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:21,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:22:21,171 INFO L93 Difference]: Finished difference Result 77038 states and 284916 transitions. [2022-01-28 15:22:21,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:22:21,171 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:22:21,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:22:21,436 INFO L225 Difference]: With dead ends: 77038 [2022-01-28 15:22:21,436 INFO L226 Difference]: Without dead ends: 77013 [2022-01-28 15:22:21,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:22:21,436 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 108 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:22:21,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 458 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:22:21,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77013 states. [2022-01-28 15:22:22,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77013 to 76219. [2022-01-28 15:22:22,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76219 states, 76218 states have (on average 3.7100553674984913) internal successors, (282773), 76218 states have internal predecessors, (282773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:23,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76219 states to 76219 states and 282773 transitions. [2022-01-28 15:22:23,454 INFO L78 Accepts]: Start accepts. Automaton has 76219 states and 282773 transitions. Word has length 25 [2022-01-28 15:22:23,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:22:23,454 INFO L470 AbstractCegarLoop]: Abstraction has 76219 states and 282773 transitions. [2022-01-28 15:22:23,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:23,455 INFO L276 IsEmpty]: Start isEmpty. Operand 76219 states and 282773 transitions. [2022-01-28 15:22:23,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:22:23,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:22:23,580 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:22:23,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-28 15:22:23,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:23,781 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:22:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:22:23,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1624702482, now seen corresponding path program 28 times [2022-01-28 15:22:23,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:22:23,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909576257] [2022-01-28 15:22:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:22:23,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:22:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:22:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:23,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:22:23,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909576257] [2022-01-28 15:22:23,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909576257] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:22:23,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670745559] [2022-01-28 15:22:23,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:22:23,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:23,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:22:23,854 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:22:23,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-28 15:22:23,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:22:23,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:22:23,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-28 15:22:23,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:22:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:23,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:22:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:24,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670745559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:22:24,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:22:24,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2022-01-28 15:22:24,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822648128] [2022-01-28 15:22:24,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:22:24,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 15:22:24,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:22:24,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 15:22:24,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:22:24,077 INFO L87 Difference]: Start difference. First operand 76219 states and 282773 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:22:24,897 INFO L93 Difference]: Finished difference Result 77565 states and 286670 transitions. [2022-01-28 15:22:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:22:24,897 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:22:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:22:25,202 INFO L225 Difference]: With dead ends: 77565 [2022-01-28 15:22:25,202 INFO L226 Difference]: Without dead ends: 77488 [2022-01-28 15:22:25,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:22:25,202 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 77 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:22:25,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 329 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:22:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77488 states. [2022-01-28 15:22:26,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77488 to 76479. [2022-01-28 15:22:26,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76479 states, 76478 states have (on average 3.7106880410052563) internal successors, (283786), 76478 states have internal predecessors, (283786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76479 states to 76479 states and 283786 transitions. [2022-01-28 15:22:27,249 INFO L78 Accepts]: Start accepts. Automaton has 76479 states and 283786 transitions. Word has length 25 [2022-01-28 15:22:27,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:22:27,249 INFO L470 AbstractCegarLoop]: Abstraction has 76479 states and 283786 transitions. [2022-01-28 15:22:27,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:27,249 INFO L276 IsEmpty]: Start isEmpty. Operand 76479 states and 283786 transitions. [2022-01-28 15:22:27,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:22:27,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:22:27,630 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:22:27,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-28 15:22:27,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:27,831 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:22:27,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:22:27,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1981712050, now seen corresponding path program 21 times [2022-01-28 15:22:27,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:22:27,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026754356] [2022-01-28 15:22:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:22:27,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:22:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:22:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:27,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:22:27,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026754356] [2022-01-28 15:22:27,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026754356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:22:27,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482213721] [2022-01-28 15:22:27,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:22:27,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:27,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:22:27,869 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:22:27,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-28 15:22:27,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 15:22:27,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:22:27,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 15:22:27,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:22:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:27,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:22:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:28,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482213721] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:22:28,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:22:28,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-01-28 15:22:28,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097312659] [2022-01-28 15:22:28,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:22:28,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:22:28,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:22:28,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:22:28,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:22:28,055 INFO L87 Difference]: Start difference. First operand 76479 states and 283786 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:29,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:22:29,969 INFO L93 Difference]: Finished difference Result 175941 states and 644627 transitions. [2022-01-28 15:22:29,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-28 15:22:29,969 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:22:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:22:30,989 INFO L225 Difference]: With dead ends: 175941 [2022-01-28 15:22:30,989 INFO L226 Difference]: Without dead ends: 175907 [2022-01-28 15:22:30,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=639, Invalid=1341, Unknown=0, NotChecked=0, Total=1980 [2022-01-28 15:22:30,989 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 400 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:22:30,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 148 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:22:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175907 states. [2022-01-28 15:22:33,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175907 to 84260. [2022-01-28 15:22:34,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84260 states, 84259 states have (on average 3.7009102885151735) internal successors, (311835), 84259 states have internal predecessors, (311835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:34,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84260 states to 84260 states and 311835 transitions. [2022-01-28 15:22:34,576 INFO L78 Accepts]: Start accepts. Automaton has 84260 states and 311835 transitions. Word has length 25 [2022-01-28 15:22:34,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:22:34,576 INFO L470 AbstractCegarLoop]: Abstraction has 84260 states and 311835 transitions. [2022-01-28 15:22:34,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:34,576 INFO L276 IsEmpty]: Start isEmpty. Operand 84260 states and 311835 transitions. [2022-01-28 15:22:34,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:22:34,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:22:34,713 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:22:34,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-01-28 15:22:34,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-01-28 15:22:34,914 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:22:34,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:22:34,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1495907946, now seen corresponding path program 22 times [2022-01-28 15:22:34,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:22:34,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370882031] [2022-01-28 15:22:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:22:34,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:22:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:22:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:34,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:22:34,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370882031] [2022-01-28 15:22:34,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370882031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:22:34,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66866424] [2022-01-28 15:22:34,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:22:34,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:34,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:22:34,949 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:22:34,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-28 15:22:34,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:22:34,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:22:34,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 15:22:34,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:22:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:35,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:22:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:35,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66866424] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:22:35,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:22:35,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-01-28 15:22:35,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959531935] [2022-01-28 15:22:35,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:22:35,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:22:35,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:22:35,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:22:35,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:22:35,125 INFO L87 Difference]: Start difference. First operand 84260 states and 311835 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:37,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:22:37,100 INFO L93 Difference]: Finished difference Result 178911 states and 657436 transitions. [2022-01-28 15:22:37,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-28 15:22:37,100 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:22:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:22:37,916 INFO L225 Difference]: With dead ends: 178911 [2022-01-28 15:22:37,916 INFO L226 Difference]: Without dead ends: 178911 [2022-01-28 15:22:37,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 15:22:37,916 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 257 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:22:37,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 69 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:22:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178911 states. [2022-01-28 15:22:41,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178911 to 137088. [2022-01-28 15:22:41,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137088 states, 137087 states have (on average 3.708105071961601) internal successors, (508333), 137087 states have internal predecessors, (508333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137088 states to 137088 states and 508333 transitions. [2022-01-28 15:22:42,613 INFO L78 Accepts]: Start accepts. Automaton has 137088 states and 508333 transitions. Word has length 25 [2022-01-28 15:22:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:22:42,613 INFO L470 AbstractCegarLoop]: Abstraction has 137088 states and 508333 transitions. [2022-01-28 15:22:42,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 137088 states and 508333 transitions. [2022-01-28 15:22:42,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:22:42,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:22:42,804 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:22:42,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-01-28 15:22:43,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:43,005 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:22:43,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:22:43,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1886312940, now seen corresponding path program 29 times [2022-01-28 15:22:43,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:22:43,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258724366] [2022-01-28 15:22:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:22:43,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:22:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:22:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:43,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:22:43,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258724366] [2022-01-28 15:22:43,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258724366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:22:43,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120839618] [2022-01-28 15:22:43,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:22:43,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:43,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:22:43,101 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:22:43,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-28 15:22:43,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:22:43,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:22:43,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:22:43,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:22:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:43,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:22:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:43,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120839618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:22:43,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:22:43,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-28 15:22:43,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995805539] [2022-01-28 15:22:43,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:22:43,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:22:43,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:22:43,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:22:43,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:22:43,546 INFO L87 Difference]: Start difference. First operand 137088 states and 508333 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-01-28 15:22:47,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:22:47,266 INFO L93 Difference]: Finished difference Result 141386 states and 520925 transitions. [2022-01-28 15:22:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-28 15:22:47,267 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 25 [2022-01-28 15:22:47,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:22:48,132 INFO L225 Difference]: With dead ends: 141386 [2022-01-28 15:22:48,132 INFO L226 Difference]: Without dead ends: 140820 [2022-01-28 15:22:48,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1066, Invalid=4786, Unknown=0, NotChecked=0, Total=5852 [2022-01-28 15:22:48,133 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 279 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:22:48,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 498 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2164 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-28 15:22:48,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140820 states. [2022-01-28 15:22:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140820 to 138168. [2022-01-28 15:22:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138168 states, 138167 states have (on average 3.705863194539941) internal successors, (512028), 138167 states have internal predecessors, (512028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:52,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138168 states to 138168 states and 512028 transitions. [2022-01-28 15:22:52,485 INFO L78 Accepts]: Start accepts. Automaton has 138168 states and 512028 transitions. Word has length 25 [2022-01-28 15:22:52,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:22:52,485 INFO L470 AbstractCegarLoop]: Abstraction has 138168 states and 512028 transitions. [2022-01-28 15:22:52,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-01-28 15:22:52,486 INFO L276 IsEmpty]: Start isEmpty. Operand 138168 states and 512028 transitions. [2022-01-28 15:22:52,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:22:52,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:22:52,675 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:22:52,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-28 15:22:52,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:52,876 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:22:52,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:22:52,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1438054580, now seen corresponding path program 30 times [2022-01-28 15:22:52,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:22:52,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833949561] [2022-01-28 15:22:52,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:22:52,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:22:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:22:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:52,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:22:52,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833949561] [2022-01-28 15:22:52,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833949561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:22:52,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673881393] [2022-01-28 15:22:52,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:22:52,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:22:52,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:22:52,950 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:22:52,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-28 15:22:52,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:22:52,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:22:52,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:22:52,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:22:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:53,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:22:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:22:53,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673881393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:22:53,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:22:53,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-28 15:22:53,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248172904] [2022-01-28 15:22:53,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:22:53,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:22:53,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:22:53,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:22:53,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:22:53,419 INFO L87 Difference]: Start difference. First operand 138168 states and 512028 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:22:56,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:22:56,227 INFO L93 Difference]: Finished difference Result 142017 states and 523727 transitions. [2022-01-28 15:22:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-28 15:22:56,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-01-28 15:22:56,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:22:57,060 INFO L225 Difference]: With dead ends: 142017 [2022-01-28 15:22:57,060 INFO L226 Difference]: Without dead ends: 141891 [2022-01-28 15:22:57,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=589, Invalid=2833, Unknown=0, NotChecked=0, Total=3422 [2022-01-28 15:22:57,060 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 239 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:22:57,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 261 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:22:57,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141891 states. [2022-01-28 15:23:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141891 to 138812. [2022-01-28 15:23:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138812 states, 138811 states have (on average 3.7045118902680625) internal successors, (514227), 138811 states have internal predecessors, (514227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:23:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138812 states to 138812 states and 514227 transitions. [2022-01-28 15:23:01,366 INFO L78 Accepts]: Start accepts. Automaton has 138812 states and 514227 transitions. Word has length 25 [2022-01-28 15:23:01,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:23:01,366 INFO L470 AbstractCegarLoop]: Abstraction has 138812 states and 514227 transitions. [2022-01-28 15:23:01,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:23:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 138812 states and 514227 transitions. [2022-01-28 15:23:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:23:01,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:23:01,548 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:23:01,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-28 15:23:01,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-01-28 15:23:01,749 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:23:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:23:01,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1941831228, now seen corresponding path program 31 times [2022-01-28 15:23:01,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:23:01,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596497563] [2022-01-28 15:23:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:23:01,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:23:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:23:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:01,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:23:01,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596497563] [2022-01-28 15:23:01,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596497563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:23:01,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853980841] [2022-01-28 15:23:01,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:23:01,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:23:01,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:23:01,827 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:23:01,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-28 15:23:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:23:01,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:23:01,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:23:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:01,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:23:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:02,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853980841] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:23:02,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:23:02,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-28 15:23:02,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456564331] [2022-01-28 15:23:02,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:23:02,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:23:02,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:23:02,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:23:02,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:23:02,200 INFO L87 Difference]: Start difference. First operand 138812 states and 514227 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:23:05,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:23:05,059 INFO L93 Difference]: Finished difference Result 144627 states and 532923 transitions. [2022-01-28 15:23:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-28 15:23:05,059 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:23:05,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:23:05,958 INFO L225 Difference]: With dead ends: 144627 [2022-01-28 15:23:05,958 INFO L226 Difference]: Without dead ends: 144162 [2022-01-28 15:23:05,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=771, Invalid=3261, Unknown=0, NotChecked=0, Total=4032 [2022-01-28 15:23:05,958 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 284 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:23:05,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 338 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 15:23:06,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144162 states. [2022-01-28 15:23:09,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144162 to 140346. [2022-01-28 15:23:09,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140346 states, 140345 states have (on average 3.703922476753714) internal successors, (519827), 140345 states have internal predecessors, (519827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:23:10,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140346 states to 140346 states and 519827 transitions. [2022-01-28 15:23:10,420 INFO L78 Accepts]: Start accepts. Automaton has 140346 states and 519827 transitions. Word has length 25 [2022-01-28 15:23:10,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:23:10,420 INFO L470 AbstractCegarLoop]: Abstraction has 140346 states and 519827 transitions. [2022-01-28 15:23:10,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:23:10,420 INFO L276 IsEmpty]: Start isEmpty. Operand 140346 states and 519827 transitions. [2022-01-28 15:23:10,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:23:10,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:23:10,668 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:23:10,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-28 15:23:10,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:23:10,884 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:23:10,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:23:10,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1014514812, now seen corresponding path program 32 times [2022-01-28 15:23:10,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:23:10,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893956199] [2022-01-28 15:23:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:23:10,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:23:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:23:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:11,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:23:11,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893956199] [2022-01-28 15:23:11,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893956199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:23:11,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272158211] [2022-01-28 15:23:11,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:23:11,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:23:11,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:23:11,051 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:23:11,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-28 15:23:11,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:23:11,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:23:11,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:23:11,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:23:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:11,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:23:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:11,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272158211] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:23:11,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:23:11,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-28 15:23:11,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981824316] [2022-01-28 15:23:11,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:23:11,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:23:11,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:23:11,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:23:11,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:23:11,838 INFO L87 Difference]: Start difference. First operand 140346 states and 519827 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:23:14,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:23:14,056 INFO L93 Difference]: Finished difference Result 142326 states and 525508 transitions. [2022-01-28 15:23:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-28 15:23:14,057 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:23:14,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:23:14,943 INFO L225 Difference]: With dead ends: 142326 [2022-01-28 15:23:14,943 INFO L226 Difference]: Without dead ends: 142301 [2022-01-28 15:23:14,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=1973, Unknown=0, NotChecked=0, Total=2352 [2022-01-28 15:23:14,943 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 234 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:23:14,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 384 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 15:23:15,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142301 states. [2022-01-28 15:23:18,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142301 to 140388. [2022-01-28 15:23:18,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140388 states, 140387 states have (on average 3.7043743366551034) internal successors, (520046), 140387 states have internal predecessors, (520046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:23:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140388 states to 140388 states and 520046 transitions. [2022-01-28 15:23:19,155 INFO L78 Accepts]: Start accepts. Automaton has 140388 states and 520046 transitions. Word has length 25 [2022-01-28 15:23:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:23:19,155 INFO L470 AbstractCegarLoop]: Abstraction has 140388 states and 520046 transitions. [2022-01-28 15:23:19,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:23:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 140388 states and 520046 transitions. [2022-01-28 15:23:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:23:19,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:23:19,356 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:23:19,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-28 15:23:19,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:23:19,556 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:23:19,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:23:19,557 INFO L85 PathProgramCache]: Analyzing trace with hash 279299422, now seen corresponding path program 33 times [2022-01-28 15:23:19,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:23:19,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458290135] [2022-01-28 15:23:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:23:19,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:23:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:23:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:19,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:23:19,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458290135] [2022-01-28 15:23:19,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458290135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:23:19,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755359222] [2022-01-28 15:23:19,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:23:19,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:23:19,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:23:19,640 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:23:19,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-28 15:23:19,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:23:19,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:23:19,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:23:19,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:23:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:19,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:23:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:20,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755359222] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:23:20,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:23:20,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-28 15:23:20,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574863366] [2022-01-28 15:23:20,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:23:20,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:23:20,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:23:20,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:23:20,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:23:20,112 INFO L87 Difference]: Start difference. First operand 140388 states and 520046 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-01-28 15:23:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:23:23,522 INFO L93 Difference]: Finished difference Result 143963 states and 530864 transitions. [2022-01-28 15:23:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-28 15:23:23,523 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 25 [2022-01-28 15:23:23,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:23:24,384 INFO L225 Difference]: With dead ends: 143963 [2022-01-28 15:23:24,385 INFO L226 Difference]: Without dead ends: 143716 [2022-01-28 15:23:24,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=773, Invalid=3649, Unknown=0, NotChecked=0, Total=4422 [2022-01-28 15:23:24,385 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 265 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 1870 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:23:24,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 460 Invalid, 1956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1870 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 15:23:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143716 states. [2022-01-28 15:23:28,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143716 to 141332. [2022-01-28 15:23:28,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141332 states, 141331 states have (on average 3.7038724695926586) internal successors, (523472), 141331 states have internal predecessors, (523472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:23:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141332 states to 141332 states and 523472 transitions. [2022-01-28 15:23:29,539 INFO L78 Accepts]: Start accepts. Automaton has 141332 states and 523472 transitions. Word has length 25 [2022-01-28 15:23:29,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:23:29,540 INFO L470 AbstractCegarLoop]: Abstraction has 141332 states and 523472 transitions. [2022-01-28 15:23:29,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-01-28 15:23:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 141332 states and 523472 transitions. [2022-01-28 15:23:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:23:29,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:23:29,747 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:23:29,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-28 15:23:29,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:23:29,947 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:23:29,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:23:29,947 INFO L85 PathProgramCache]: Analyzing trace with hash 727557782, now seen corresponding path program 34 times [2022-01-28 15:23:29,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:23:29,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609119851] [2022-01-28 15:23:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:23:29,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:23:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:23:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:30,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:23:30,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609119851] [2022-01-28 15:23:30,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609119851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:23:30,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629873694] [2022-01-28 15:23:30,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:23:30,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:23:30,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:23:30,023 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:23:30,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-28 15:23:30,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:23:30,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:23:30,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:23:30,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:23:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:30,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:23:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:30,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629873694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:23:30,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:23:30,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-28 15:23:30,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476566575] [2022-01-28 15:23:30,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:23:30,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:23:30,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:23:30,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:23:30,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:23:30,503 INFO L87 Difference]: Start difference. First operand 141332 states and 523472 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:23:33,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:23:33,566 INFO L93 Difference]: Finished difference Result 144896 states and 534639 transitions. [2022-01-28 15:23:33,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-28 15:23:33,567 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-01-28 15:23:33,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:23:34,265 INFO L225 Difference]: With dead ends: 144896 [2022-01-28 15:23:34,265 INFO L226 Difference]: Without dead ends: 144756 [2022-01-28 15:23:34,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=649, Invalid=2773, Unknown=0, NotChecked=0, Total=3422 [2022-01-28 15:23:34,265 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 237 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:23:34,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 222 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:23:34,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144756 states. [2022-01-28 15:23:38,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144756 to 142188. [2022-01-28 15:23:38,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142188 states, 142187 states have (on average 3.703306209428429) internal successors, (526562), 142187 states have internal predecessors, (526562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:23:39,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142188 states to 142188 states and 526562 transitions. [2022-01-28 15:23:39,289 INFO L78 Accepts]: Start accepts. Automaton has 142188 states and 526562 transitions. Word has length 25 [2022-01-28 15:23:39,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:23:39,289 INFO L470 AbstractCegarLoop]: Abstraction has 142188 states and 526562 transitions. [2022-01-28 15:23:39,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:23:39,289 INFO L276 IsEmpty]: Start isEmpty. Operand 142188 states and 526562 transitions. [2022-01-28 15:23:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:23:39,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:23:39,506 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:23:39,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-28 15:23:39,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-01-28 15:23:39,707 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:23:39,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:23:39,707 INFO L85 PathProgramCache]: Analyzing trace with hash 832207754, now seen corresponding path program 35 times [2022-01-28 15:23:39,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:23:39,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181508468] [2022-01-28 15:23:39,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:23:39,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:23:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:23:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:39,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:23:39,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181508468] [2022-01-28 15:23:39,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181508468] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:23:39,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946808885] [2022-01-28 15:23:39,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:23:39,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:23:39,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:23:39,789 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:23:39,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-28 15:23:39,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:23:39,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:23:39,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:23:39,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:23:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:39,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:23:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:40,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946808885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:23:40,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:23:40,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-28 15:23:40,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544752759] [2022-01-28 15:23:40,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:23:40,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:23:40,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:23:40,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:23:40,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:23:40,235 INFO L87 Difference]: Start difference. First operand 142188 states and 526562 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:23:43,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:23:43,527 INFO L93 Difference]: Finished difference Result 146879 states and 541680 transitions. [2022-01-28 15:23:43,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-28 15:23:43,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:23:43,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:23:44,369 INFO L225 Difference]: With dead ends: 146879 [2022-01-28 15:23:44,369 INFO L226 Difference]: Without dead ends: 146854 [2022-01-28 15:23:44,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=550, Invalid=2312, Unknown=0, NotChecked=0, Total=2862 [2022-01-28 15:23:44,370 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 218 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:23:44,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 338 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1651 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 15:23:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146854 states. [2022-01-28 15:23:47,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146854 to 143126. [2022-01-28 15:23:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143126 states, 143125 states have (on average 3.704761572052402) internal successors, (530244), 143125 states have internal predecessors, (530244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:23:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143126 states to 143126 states and 530244 transitions. [2022-01-28 15:23:49,075 INFO L78 Accepts]: Start accepts. Automaton has 143126 states and 530244 transitions. Word has length 25 [2022-01-28 15:23:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:23:49,075 INFO L470 AbstractCegarLoop]: Abstraction has 143126 states and 530244 transitions. [2022-01-28 15:23:49,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:23:49,075 INFO L276 IsEmpty]: Start isEmpty. Operand 143126 states and 530244 transitions. [2022-01-28 15:23:49,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:23:49,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:23:49,609 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:23:49,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-28 15:23:49,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:23:49,810 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:23:49,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:23:49,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1322581018, now seen corresponding path program 36 times [2022-01-28 15:23:49,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:23:49,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847105239] [2022-01-28 15:23:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:23:49,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:23:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:23:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:49,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:23:49,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847105239] [2022-01-28 15:23:49,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847105239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:23:49,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618441380] [2022-01-28 15:23:49,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:23:49,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:23:49,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:23:49,903 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:23:49,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-28 15:23:49,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:23:49,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:23:49,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:23:49,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:23:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:50,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:23:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:23:50,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618441380] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:23:50,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:23:50,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-28 15:23:50,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894755711] [2022-01-28 15:23:50,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:23:50,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:23:50,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:23:50,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:23:50,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:23:50,432 INFO L87 Difference]: Start difference. First operand 143126 states and 530244 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-01-28 15:23:54,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:23:54,003 INFO L93 Difference]: Finished difference Result 145320 states and 536606 transitions. [2022-01-28 15:23:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-28 15:23:54,003 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 25 [2022-01-28 15:23:54,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:23:54,658 INFO L225 Difference]: With dead ends: 145320 [2022-01-28 15:23:54,658 INFO L226 Difference]: Without dead ends: 145127 [2022-01-28 15:23:54,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=773, Invalid=3517, Unknown=0, NotChecked=0, Total=4290 [2022-01-28 15:23:54,659 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 228 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:23:54,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 414 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 15:23:54,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145127 states. [2022-01-28 15:23:58,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145127 to 143595. [2022-01-28 15:23:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143595 states, 143594 states have (on average 3.704089307352675) internal successors, (531885), 143594 states have internal predecessors, (531885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:23:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143595 states to 143595 states and 531885 transitions. [2022-01-28 15:23:59,665 INFO L78 Accepts]: Start accepts. Automaton has 143595 states and 531885 transitions. Word has length 25 [2022-01-28 15:23:59,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:23:59,665 INFO L470 AbstractCegarLoop]: Abstraction has 143595 states and 531885 transitions. [2022-01-28 15:23:59,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-01-28 15:23:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 143595 states and 531885 transitions. [2022-01-28 15:23:59,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:23:59,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:23:59,891 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:23:59,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-28 15:24:00,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:24:00,092 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:24:00,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:24:00,092 INFO L85 PathProgramCache]: Analyzing trace with hash 442141958, now seen corresponding path program 37 times [2022-01-28 15:24:00,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:24:00,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971711441] [2022-01-28 15:24:00,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:24:00,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:24:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:24:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:00,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:24:00,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971711441] [2022-01-28 15:24:00,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971711441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:24:00,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979522974] [2022-01-28 15:24:00,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:24:00,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:24:00,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:24:00,188 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:24:00,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-28 15:24:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:24:00,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:24:00,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:24:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:00,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:24:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:00,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979522974] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:24:00,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:24:00,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-28 15:24:00,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490232593] [2022-01-28 15:24:00,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:24:00,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:24:00,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:24:00,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:24:00,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:24:00,712 INFO L87 Difference]: Start difference. First operand 143595 states and 531885 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:24:03,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:24:03,937 INFO L93 Difference]: Finished difference Result 146073 states and 539051 transitions. [2022-01-28 15:24:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-28 15:24:03,937 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-01-28 15:24:03,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:24:04,600 INFO L225 Difference]: With dead ends: 146073 [2022-01-28 15:24:04,600 INFO L226 Difference]: Without dead ends: 145985 [2022-01-28 15:24:04,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=680, Invalid=2980, Unknown=0, NotChecked=0, Total=3660 [2022-01-28 15:24:04,600 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 236 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:24:04,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 339 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 15:24:05,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145985 states. [2022-01-28 15:24:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145985 to 144040. [2022-01-28 15:24:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144040 states, 144039 states have (on average 3.704156513166573) internal successors, (533543), 144039 states have internal predecessors, (533543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:24:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144040 states to 144040 states and 533543 transitions. [2022-01-28 15:24:09,552 INFO L78 Accepts]: Start accepts. Automaton has 144040 states and 533543 transitions. Word has length 25 [2022-01-28 15:24:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:24:09,552 INFO L470 AbstractCegarLoop]: Abstraction has 144040 states and 533543 transitions. [2022-01-28 15:24:09,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:24:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 144040 states and 533543 transitions. [2022-01-28 15:24:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:24:09,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:24:09,754 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:24:09,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-28 15:24:09,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-01-28 15:24:09,954 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:24:09,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:24:09,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1643963730, now seen corresponding path program 38 times [2022-01-28 15:24:09,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:24:09,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644834827] [2022-01-28 15:24:09,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:24:09,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:24:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:24:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:10,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:24:10,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644834827] [2022-01-28 15:24:10,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644834827] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:24:10,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405618075] [2022-01-28 15:24:10,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:24:10,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:24:10,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:24:10,040 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:24:10,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-28 15:24:10,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:24:10,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:24:10,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:24:10,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:24:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:10,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:24:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:10,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405618075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:24:10,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:24:10,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-28 15:24:10,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164153613] [2022-01-28 15:24:10,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:24:10,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:24:10,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:24:10,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:24:10,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:24:10,814 INFO L87 Difference]: Start difference. First operand 144040 states and 533543 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:24:13,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:24:13,418 INFO L93 Difference]: Finished difference Result 146480 states and 540869 transitions. [2022-01-28 15:24:13,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-28 15:24:13,418 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:24:13,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:24:14,377 INFO L225 Difference]: With dead ends: 146480 [2022-01-28 15:24:14,378 INFO L226 Difference]: Without dead ends: 146375 [2022-01-28 15:24:14,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=563, Invalid=2193, Unknown=0, NotChecked=0, Total=2756 [2022-01-28 15:24:14,378 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 199 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:24:14,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 335 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 15:24:14,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146375 states. [2022-01-28 15:24:18,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146375 to 144193. [2022-01-28 15:24:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144193 states, 144192 states have (on average 3.704824123391034) internal successors, (534206), 144192 states have internal predecessors, (534206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:24:19,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144193 states to 144193 states and 534206 transitions. [2022-01-28 15:24:19,190 INFO L78 Accepts]: Start accepts. Automaton has 144193 states and 534206 transitions. Word has length 25 [2022-01-28 15:24:19,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:24:19,190 INFO L470 AbstractCegarLoop]: Abstraction has 144193 states and 534206 transitions. [2022-01-28 15:24:19,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:24:19,191 INFO L276 IsEmpty]: Start isEmpty. Operand 144193 states and 534206 transitions. [2022-01-28 15:24:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:24:19,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:24:19,411 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:24:19,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-28 15:24:19,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:24:19,615 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:24:19,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:24:19,616 INFO L85 PathProgramCache]: Analyzing trace with hash -5117990, now seen corresponding path program 39 times [2022-01-28 15:24:19,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:24:19,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678275916] [2022-01-28 15:24:19,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:24:19,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:24:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:24:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:19,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:24:19,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678275916] [2022-01-28 15:24:19,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678275916] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:24:19,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507983056] [2022-01-28 15:24:19,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:24:19,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:24:19,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:24:19,725 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:24:19,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-28 15:24:19,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:24:19,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:24:19,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:24:19,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:24:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:19,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:24:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:20,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507983056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:24:20,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:24:20,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-28 15:24:20,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663328095] [2022-01-28 15:24:20,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:24:20,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:24:20,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:24:20,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:24:20,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:24:20,534 INFO L87 Difference]: Start difference. First operand 144193 states and 534206 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:24:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:24:24,776 INFO L93 Difference]: Finished difference Result 146637 states and 541131 transitions. [2022-01-28 15:24:24,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-28 15:24:24,776 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:24:24,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:24:25,467 INFO L225 Difference]: With dead ends: 146637 [2022-01-28 15:24:25,467 INFO L226 Difference]: Without dead ends: 146369 [2022-01-28 15:24:25,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1826 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=923, Invalid=5239, Unknown=0, NotChecked=0, Total=6162 [2022-01-28 15:24:25,468 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 305 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:24:25,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 512 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1746 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 15:24:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146369 states. [2022-01-28 15:24:29,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146369 to 144413. [2022-01-28 15:24:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144413 states, 144412 states have (on average 3.704428994820375) internal successors, (534964), 144412 states have internal predecessors, (534964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:24:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144413 states to 144413 states and 534964 transitions. [2022-01-28 15:24:30,609 INFO L78 Accepts]: Start accepts. Automaton has 144413 states and 534964 transitions. Word has length 25 [2022-01-28 15:24:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:24:30,609 INFO L470 AbstractCegarLoop]: Abstraction has 144413 states and 534964 transitions. [2022-01-28 15:24:30,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:24:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 144413 states and 534964 transitions. [2022-01-28 15:24:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:24:30,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:24:30,818 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:24:30,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-28 15:24:31,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:24:31,018 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:24:31,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:24:31,018 INFO L85 PathProgramCache]: Analyzing trace with hash 134174410, now seen corresponding path program 40 times [2022-01-28 15:24:31,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:24:31,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677994446] [2022-01-28 15:24:31,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:24:31,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:24:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:24:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:31,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:24:31,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677994446] [2022-01-28 15:24:31,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677994446] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:24:31,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820250904] [2022-01-28 15:24:31,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:24:31,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:24:31,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:24:31,105 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:24:31,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-28 15:24:31,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:24:31,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:24:31,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:24:31,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:24:31,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:31,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:24:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:31,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820250904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:24:31,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:24:31,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-28 15:24:31,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547501204] [2022-01-28 15:24:31,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:24:31,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:24:31,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:24:31,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:24:31,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:24:31,858 INFO L87 Difference]: Start difference. First operand 144413 states and 534964 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:24:35,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:24:35,434 INFO L93 Difference]: Finished difference Result 146876 states and 542084 transitions. [2022-01-28 15:24:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-28 15:24:35,434 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:24:35,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:24:36,103 INFO L225 Difference]: With dead ends: 146876 [2022-01-28 15:24:36,104 INFO L226 Difference]: Without dead ends: 146820 [2022-01-28 15:24:36,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=693, Invalid=3999, Unknown=0, NotChecked=0, Total=4692 [2022-01-28 15:24:36,104 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 209 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 2046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:24:36,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 486 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 15:24:36,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146820 states. [2022-01-28 15:24:40,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146820 to 144399. [2022-01-28 15:24:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144399 states, 144398 states have (on average 3.7046357982797544) internal successors, (534942), 144398 states have internal predecessors, (534942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:24:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144399 states to 144399 states and 534942 transitions. [2022-01-28 15:24:41,341 INFO L78 Accepts]: Start accepts. Automaton has 144399 states and 534942 transitions. Word has length 25 [2022-01-28 15:24:41,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:24:41,341 INFO L470 AbstractCegarLoop]: Abstraction has 144399 states and 534942 transitions. [2022-01-28 15:24:41,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:24:41,342 INFO L276 IsEmpty]: Start isEmpty. Operand 144399 states and 534942 transitions. [2022-01-28 15:24:41,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:24:41,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:24:41,551 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:24:41,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-28 15:24:41,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-28 15:24:41,751 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:24:41,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:24:41,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1483034154, now seen corresponding path program 41 times [2022-01-28 15:24:41,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:24:41,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67856111] [2022-01-28 15:24:41,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:24:41,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:24:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:24:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:41,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:24:41,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67856111] [2022-01-28 15:24:41,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67856111] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:24:41,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580215053] [2022-01-28 15:24:41,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:24:41,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:24:41,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:24:41,849 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:24:41,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-28 15:24:41,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:24:41,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:24:41,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:24:41,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:24:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:42,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:24:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:42,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580215053] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:24:42,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:24:42,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-28 15:24:42,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77203928] [2022-01-28 15:24:42,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:24:42,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:24:42,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:24:42,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:24:42,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:24:42,413 INFO L87 Difference]: Start difference. First operand 144399 states and 534942 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:24:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:24:46,054 INFO L93 Difference]: Finished difference Result 145981 states and 539303 transitions. [2022-01-28 15:24:46,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-28 15:24:46,054 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:24:46,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:24:46,958 INFO L225 Difference]: With dead ends: 145981 [2022-01-28 15:24:46,958 INFO L226 Difference]: Without dead ends: 145850 [2022-01-28 15:24:46,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=653, Invalid=3903, Unknown=0, NotChecked=0, Total=4556 [2022-01-28 15:24:46,959 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 209 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:24:46,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 517 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-28 15:24:47,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145850 states. [2022-01-28 15:24:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145850 to 144421. [2022-01-28 15:24:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144421 states, 144420 states have (on average 3.7045423071596733) internal successors, (535010), 144420 states have internal predecessors, (535010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:24:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144421 states to 144421 states and 535010 transitions. [2022-01-28 15:24:51,736 INFO L78 Accepts]: Start accepts. Automaton has 144421 states and 535010 transitions. Word has length 25 [2022-01-28 15:24:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:24:51,736 INFO L470 AbstractCegarLoop]: Abstraction has 144421 states and 535010 transitions. [2022-01-28 15:24:51,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:24:51,736 INFO L276 IsEmpty]: Start isEmpty. Operand 144421 states and 535010 transitions. [2022-01-28 15:24:52,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:24:52,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:24:52,305 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:24:52,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-28 15:24:52,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:24:52,511 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:24:52,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:24:52,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1774525126, now seen corresponding path program 42 times [2022-01-28 15:24:52,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:24:52,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064574199] [2022-01-28 15:24:52,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:24:52,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:24:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:24:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:52,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:24:52,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064574199] [2022-01-28 15:24:52,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064574199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:24:52,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585664994] [2022-01-28 15:24:52,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:24:52,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:24:52,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:24:52,610 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:24:52,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-28 15:24:52,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 15:24:52,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:24:52,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 15:24:52,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:24:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:52,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:24:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:24:53,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585664994] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:24:53,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:24:53,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 21 [2022-01-28 15:24:53,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360746982] [2022-01-28 15:24:53,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:24:53,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:24:53,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:24:53,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:24:53,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:24:53,194 INFO L87 Difference]: Start difference. First operand 144421 states and 535010 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:24:54,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:24:54,675 INFO L93 Difference]: Finished difference Result 153452 states and 564711 transitions. [2022-01-28 15:24:54,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 15:24:54,676 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 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 [2022-01-28 15:24:54,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:24:55,647 INFO L225 Difference]: With dead ends: 153452 [2022-01-28 15:24:55,647 INFO L226 Difference]: Without dead ends: 153431 [2022-01-28 15:24:55,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:24:55,648 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 107 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:24:55,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 351 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:24:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153431 states. [2022-01-28 15:24:59,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153431 to 144496. [2022-01-28 15:24:59,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144496 states, 144495 states have (on average 3.7044672826049343) internal successors, (535277), 144495 states have internal predecessors, (535277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:25:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144496 states to 144496 states and 535277 transitions. [2022-01-28 15:25:01,007 INFO L78 Accepts]: Start accepts. Automaton has 144496 states and 535277 transitions. Word has length 25 [2022-01-28 15:25:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:25:01,007 INFO L470 AbstractCegarLoop]: Abstraction has 144496 states and 535277 transitions. [2022-01-28 15:25:01,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:25:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 144496 states and 535277 transitions. [2022-01-28 15:25:01,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:25:01,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:25:01,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:25:01,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-28 15:25:01,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:25:01,467 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:25:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:25:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1079221178, now seen corresponding path program 43 times [2022-01-28 15:25:01,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:25:01,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3493168] [2022-01-28 15:25:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:25:01,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:25:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:25:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:01,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:25:01,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3493168] [2022-01-28 15:25:01,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3493168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:25:01,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798262683] [2022-01-28 15:25:01,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:25:01,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:25:01,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:25:01,627 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:25:01,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-28 15:25:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:25:01,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:25:01,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:25:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:02,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:25:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:02,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798262683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:25:02,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:25:02,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-28 15:25:02,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568511285] [2022-01-28 15:25:02,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:25:02,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:25:02,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:25:02,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:25:02,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:25:02,451 INFO L87 Difference]: Start difference. First operand 144496 states and 535277 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:25:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:25:06,231 INFO L93 Difference]: Finished difference Result 184057 states and 677848 transitions. [2022-01-28 15:25:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-28 15:25:06,232 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-01-28 15:25:06,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:25:07,394 INFO L225 Difference]: With dead ends: 184057 [2022-01-28 15:25:07,394 INFO L226 Difference]: Without dead ends: 183526 [2022-01-28 15:25:07,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=898, Invalid=4214, Unknown=0, NotChecked=0, Total=5112 [2022-01-28 15:25:07,395 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 284 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:25:07,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 673 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 15:25:07,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183526 states. [2022-01-28 15:25:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183526 to 145034. [2022-01-28 15:25:11,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145034 states, 145033 states have (on average 3.703770865940855) internal successors, (537169), 145033 states have internal predecessors, (537169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:25:12,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145034 states to 145034 states and 537169 transitions. [2022-01-28 15:25:12,489 INFO L78 Accepts]: Start accepts. Automaton has 145034 states and 537169 transitions. Word has length 25 [2022-01-28 15:25:12,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:25:12,490 INFO L470 AbstractCegarLoop]: Abstraction has 145034 states and 537169 transitions. [2022-01-28 15:25:12,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:25:12,490 INFO L276 IsEmpty]: Start isEmpty. Operand 145034 states and 537169 transitions. [2022-01-28 15:25:13,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:25:13,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:25:13,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:25:13,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-28 15:25:13,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:25:13,255 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:25:13,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:25:13,255 INFO L85 PathProgramCache]: Analyzing trace with hash 762260422, now seen corresponding path program 44 times [2022-01-28 15:25:13,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:25:13,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164768758] [2022-01-28 15:25:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:25:13,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:25:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:25:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:13,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:25:13,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164768758] [2022-01-28 15:25:13,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164768758] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:25:13,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074439645] [2022-01-28 15:25:13,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:25:13,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:25:13,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:25:13,344 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:25:13,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-28 15:25:13,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:25:13,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:25:13,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:25:13,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:25:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:13,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:25:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:13,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074439645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:25:13,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:25:13,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-28 15:25:13,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637123830] [2022-01-28 15:25:13,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:25:13,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:25:13,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:25:13,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:25:13,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:25:13,772 INFO L87 Difference]: Start difference. First operand 145034 states and 537169 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:25:16,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:25:16,622 INFO L93 Difference]: Finished difference Result 148910 states and 549117 transitions. [2022-01-28 15:25:16,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-28 15:25:16,623 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:25:16,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:25:17,344 INFO L225 Difference]: With dead ends: 148910 [2022-01-28 15:25:17,344 INFO L226 Difference]: Without dead ends: 148651 [2022-01-28 15:25:17,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=555, Invalid=2307, Unknown=0, NotChecked=0, Total=2862 [2022-01-28 15:25:17,344 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 266 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:25:17,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 443 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 15:25:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148651 states. [2022-01-28 15:25:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148651 to 145681. [2022-01-28 15:25:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145681 states, 145680 states have (on average 3.7042284459088415) internal successors, (539632), 145680 states have internal predecessors, (539632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:25:22,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145681 states to 145681 states and 539632 transitions. [2022-01-28 15:25:22,571 INFO L78 Accepts]: Start accepts. Automaton has 145681 states and 539632 transitions. Word has length 25 [2022-01-28 15:25:22,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:25:22,571 INFO L470 AbstractCegarLoop]: Abstraction has 145681 states and 539632 transitions. [2022-01-28 15:25:22,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:25:22,571 INFO L276 IsEmpty]: Start isEmpty. Operand 145681 states and 539632 transitions. [2022-01-28 15:25:22,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:25:22,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:25:22,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:25:22,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-01-28 15:25:22,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-01-28 15:25:22,983 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:25:22,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:25:22,983 INFO L85 PathProgramCache]: Analyzing trace with hash -649407290, now seen corresponding path program 45 times [2022-01-28 15:25:22,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:25:22,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929759610] [2022-01-28 15:25:22,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:25:22,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:25:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:25:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:23,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:25:23,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929759610] [2022-01-28 15:25:23,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929759610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:25:23,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261131468] [2022-01-28 15:25:23,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:25:23,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:25:23,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:25:23,102 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:25:23,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-28 15:25:23,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:25:23,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:25:23,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:25:23,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:25:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:23,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:25:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:23,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261131468] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:25:23,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:25:23,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-28 15:25:23,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865297089] [2022-01-28 15:25:23,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:25:23,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:25:23,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:25:23,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:25:23,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:25:23,557 INFO L87 Difference]: Start difference. First operand 145681 states and 539632 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:25:27,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:25:27,639 INFO L93 Difference]: Finished difference Result 153091 states and 563140 transitions. [2022-01-28 15:25:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-28 15:25:27,640 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-01-28 15:25:27,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:25:28,620 INFO L225 Difference]: With dead ends: 153091 [2022-01-28 15:25:28,620 INFO L226 Difference]: Without dead ends: 152369 [2022-01-28 15:25:28,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1473, Invalid=5837, Unknown=0, NotChecked=0, Total=7310 [2022-01-28 15:25:28,621 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 445 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:25:28,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 524 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1675 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 15:25:28,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152369 states. [2022-01-28 15:25:33,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152369 to 146199. [2022-01-28 15:25:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146199 states, 146198 states have (on average 3.706056170399048) internal successors, (541818), 146198 states have internal predecessors, (541818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:25:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146199 states to 146199 states and 541818 transitions. [2022-01-28 15:25:34,696 INFO L78 Accepts]: Start accepts. Automaton has 146199 states and 541818 transitions. Word has length 25 [2022-01-28 15:25:34,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:25:34,696 INFO L470 AbstractCegarLoop]: Abstraction has 146199 states and 541818 transitions. [2022-01-28 15:25:34,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:25:34,697 INFO L276 IsEmpty]: Start isEmpty. Operand 146199 states and 541818 transitions. [2022-01-28 15:25:34,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:25:34,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:25:34,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:25:34,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-28 15:25:35,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:25:35,166 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:25:35,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:25:35,166 INFO L85 PathProgramCache]: Analyzing trace with hash 329150154, now seen corresponding path program 46 times [2022-01-28 15:25:35,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:25:35,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561236670] [2022-01-28 15:25:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:25:35,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:25:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:25:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:35,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:25:35,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561236670] [2022-01-28 15:25:35,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561236670] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:25:35,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465855324] [2022-01-28 15:25:35,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:25:35,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:25:35,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:25:35,620 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:25:35,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-28 15:25:35,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:25:35,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:25:35,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:25:35,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:25:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:35,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:25:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:36,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465855324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:25:36,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:25:36,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-28 15:25:36,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901900164] [2022-01-28 15:25:36,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:25:36,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:25:36,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:25:36,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:25:36,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:25:36,431 INFO L87 Difference]: Start difference. First operand 146199 states and 541818 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) [2022-01-28 15:25:42,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:25:42,054 INFO L93 Difference]: Finished difference Result 175626 states and 652773 transitions. [2022-01-28 15:25:42,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-28 15:25:42,054 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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 25 [2022-01-28 15:25:42,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:25:42,829 INFO L225 Difference]: With dead ends: 175626 [2022-01-28 15:25:42,829 INFO L226 Difference]: Without dead ends: 174622 [2022-01-28 15:25:42,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3153 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2042, Invalid=7464, Unknown=0, NotChecked=0, Total=9506 [2022-01-28 15:25:42,829 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 572 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 1921 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 2220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 1921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:25:42,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 603 Invalid, 2220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 1921 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-28 15:25:43,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174622 states. [2022-01-28 15:25:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174622 to 147170. [2022-01-28 15:25:47,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147170 states, 147169 states have (on average 3.7055765820247473) internal successors, (545346), 147169 states have internal predecessors, (545346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:25:48,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147170 states to 147170 states and 545346 transitions. [2022-01-28 15:25:48,647 INFO L78 Accepts]: Start accepts. Automaton has 147170 states and 545346 transitions. Word has length 25 [2022-01-28 15:25:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:25:48,647 INFO L470 AbstractCegarLoop]: Abstraction has 147170 states and 545346 transitions. [2022-01-28 15:25:48,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) [2022-01-28 15:25:48,647 INFO L276 IsEmpty]: Start isEmpty. Operand 147170 states and 545346 transitions. [2022-01-28 15:25:48,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:25:48,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:25:48,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:25:48,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-01-28 15:25:49,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:25:49,063 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:25:49,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:25:49,064 INFO L85 PathProgramCache]: Analyzing trace with hash 996526086, now seen corresponding path program 47 times [2022-01-28 15:25:49,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:25:49,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859616002] [2022-01-28 15:25:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:25:49,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:25:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:25:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:49,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:25:49,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859616002] [2022-01-28 15:25:49,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859616002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:25:49,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576483172] [2022-01-28 15:25:49,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:25:49,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:25:49,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:25:49,156 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:25:49,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-28 15:25:49,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:25:49,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:25:49,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:25:49,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:25:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:49,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:25:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:49,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576483172] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:25:49,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:25:49,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-28 15:25:49,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175130118] [2022-01-28 15:25:49,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:25:49,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:25:49,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:25:49,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:25:49,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:25:49,566 INFO L87 Difference]: Start difference. First operand 147170 states and 545346 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:25:51,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:25:51,943 INFO L93 Difference]: Finished difference Result 149543 states and 552319 transitions. [2022-01-28 15:25:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-28 15:25:51,943 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:25:51,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:25:52,873 INFO L225 Difference]: With dead ends: 149543 [2022-01-28 15:25:52,873 INFO L226 Difference]: Without dead ends: 149482 [2022-01-28 15:25:52,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=354, Invalid=1716, Unknown=0, NotChecked=0, Total=2070 [2022-01-28 15:25:52,873 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 252 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:25:52,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 324 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 15:25:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149482 states. [2022-01-28 15:25:56,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149482 to 147233. [2022-01-28 15:25:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147233 states, 147232 states have (on average 3.705444468593784) internal successors, (545560), 147232 states have internal predecessors, (545560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:25:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147233 states to 147233 states and 545560 transitions. [2022-01-28 15:25:57,426 INFO L78 Accepts]: Start accepts. Automaton has 147233 states and 545560 transitions. Word has length 25 [2022-01-28 15:25:57,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:25:57,426 INFO L470 AbstractCegarLoop]: Abstraction has 147233 states and 545560 transitions. [2022-01-28 15:25:57,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:25:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 147233 states and 545560 transitions. [2022-01-28 15:25:57,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:25:57,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:25:57,958 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:25:57,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-28 15:25:58,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:25:58,163 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:25:58,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:25:58,164 INFO L85 PathProgramCache]: Analyzing trace with hash -159527286, now seen corresponding path program 48 times [2022-01-28 15:25:58,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:25:58,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124192168] [2022-01-28 15:25:58,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:25:58,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:25:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:25:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:58,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:25:58,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124192168] [2022-01-28 15:25:58,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124192168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:25:58,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638390796] [2022-01-28 15:25:58,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:25:58,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:25:58,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:25:58,273 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:25:58,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-28 15:25:58,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:25:58,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:25:58,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:25:58,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:25:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:58,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:25:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:25:58,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638390796] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:25:58,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:25:58,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-28 15:25:58,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106861838] [2022-01-28 15:25:58,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:25:58,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:25:58,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:25:58,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:25:58,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:25:58,694 INFO L87 Difference]: Start difference. First operand 147233 states and 545560 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:01,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:01,557 INFO L93 Difference]: Finished difference Result 149710 states and 552963 transitions. [2022-01-28 15:26:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-28 15:26:01,558 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:26:01,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:02,252 INFO L225 Difference]: With dead ends: 149710 [2022-01-28 15:26:02,252 INFO L226 Difference]: Without dead ends: 149471 [2022-01-28 15:26:02,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=649, Invalid=3133, Unknown=0, NotChecked=0, Total=3782 [2022-01-28 15:26:02,253 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 307 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:02,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 346 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 15:26:02,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149471 states. [2022-01-28 15:26:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149471 to 147187. [2022-01-28 15:26:06,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147187 states, 147186 states have (on average 3.7057328822034705) internal successors, (545432), 147186 states have internal predecessors, (545432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147187 states to 147187 states and 545432 transitions. [2022-01-28 15:26:07,387 INFO L78 Accepts]: Start accepts. Automaton has 147187 states and 545432 transitions. Word has length 25 [2022-01-28 15:26:07,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:07,387 INFO L470 AbstractCegarLoop]: Abstraction has 147187 states and 545432 transitions. [2022-01-28 15:26:07,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:07,387 INFO L276 IsEmpty]: Start isEmpty. Operand 147187 states and 545432 transitions. [2022-01-28 15:26:07,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:26:07,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:07,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:07,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-28 15:26:07,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:07,823 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:07,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:07,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2048707596, now seen corresponding path program 49 times [2022-01-28 15:26:07,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:07,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435821307] [2022-01-28 15:26:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:07,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:08,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:08,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435821307] [2022-01-28 15:26:08,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435821307] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:08,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570691989] [2022-01-28 15:26:08,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:26:08,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:08,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:08,247 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:26:08,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-28 15:26:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:08,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 15:26:08,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:08,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:08,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570691989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:08,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:08,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 19 [2022-01-28 15:26:08,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325891793] [2022-01-28 15:26:08,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:08,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:26:08,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:08,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:26:08,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:26:08,792 INFO L87 Difference]: Start difference. First operand 147187 states and 545432 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:12,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:12,947 INFO L93 Difference]: Finished difference Result 254702 states and 944263 transitions. [2022-01-28 15:26:12,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-28 15:26:12,947 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:26:12,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:14,160 INFO L225 Difference]: With dead ends: 254702 [2022-01-28 15:26:14,160 INFO L226 Difference]: Without dead ends: 253965 [2022-01-28 15:26:14,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1159, Invalid=3001, Unknown=0, NotChecked=0, Total=4160 [2022-01-28 15:26:14,161 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 340 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:14,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 426 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 15:26:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253965 states. [2022-01-28 15:26:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253965 to 172277. [2022-01-28 15:26:20,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172277 states, 172276 states have (on average 3.723020037614061) internal successors, (641387), 172276 states have internal predecessors, (641387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172277 states to 172277 states and 641387 transitions. [2022-01-28 15:26:21,706 INFO L78 Accepts]: Start accepts. Automaton has 172277 states and 641387 transitions. Word has length 25 [2022-01-28 15:26:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:21,706 INFO L470 AbstractCegarLoop]: Abstraction has 172277 states and 641387 transitions. [2022-01-28 15:26:21,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 172277 states and 641387 transitions. [2022-01-28 15:26:22,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:26:22,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:22,010 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:22,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-28 15:26:22,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-01-28 15:26:22,211 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:22,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:22,211 INFO L85 PathProgramCache]: Analyzing trace with hash 722552530, now seen corresponding path program 50 times [2022-01-28 15:26:22,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:22,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181635343] [2022-01-28 15:26:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:22,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:22,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:22,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181635343] [2022-01-28 15:26:22,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181635343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:22,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260945333] [2022-01-28 15:26:22,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:26:22,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:22,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:22,280 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:26:22,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-28 15:26:22,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:26:22,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:22,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:26:22,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:22,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:22,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260945333] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:22,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:22,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-28 15:26:22,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095728267] [2022-01-28 15:26:22,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:22,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:26:22,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:22,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:26:22,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:26:22,641 INFO L87 Difference]: Start difference. First operand 172277 states and 641387 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 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) [2022-01-28 15:26:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:28,046 INFO L93 Difference]: Finished difference Result 200452 states and 741384 transitions. [2022-01-28 15:26:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-28 15:26:28,047 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 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 25 [2022-01-28 15:26:28,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:29,323 INFO L225 Difference]: With dead ends: 200452 [2022-01-28 15:26:29,323 INFO L226 Difference]: Without dead ends: 200277 [2022-01-28 15:26:29,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4573 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1867, Invalid=11243, Unknown=0, NotChecked=0, Total=13110 [2022-01-28 15:26:29,324 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 546 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 2297 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 2454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:29,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 703 Invalid, 2454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2297 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-28 15:26:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200277 states. [2022-01-28 15:26:34,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200277 to 187290. [2022-01-28 15:26:35,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187290 states, 187289 states have (on average 3.715381042132747) internal successors, (695850), 187289 states have internal predecessors, (695850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:36,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187290 states to 187290 states and 695850 transitions. [2022-01-28 15:26:36,146 INFO L78 Accepts]: Start accepts. Automaton has 187290 states and 695850 transitions. Word has length 25 [2022-01-28 15:26:36,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:36,146 INFO L470 AbstractCegarLoop]: Abstraction has 187290 states and 695850 transitions. [2022-01-28 15:26:36,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 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) [2022-01-28 15:26:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 187290 states and 695850 transitions. [2022-01-28 15:26:36,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:26:36,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:36,464 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:36,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-01-28 15:26:36,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-01-28 15:26:36,665 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:36,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:36,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1242862310, now seen corresponding path program 51 times [2022-01-28 15:26:36,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:36,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181386955] [2022-01-28 15:26:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:36,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:36,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:36,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181386955] [2022-01-28 15:26:36,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181386955] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:36,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268514082] [2022-01-28 15:26:36,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:26:36,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:36,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:36,750 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:26:36,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-28 15:26:36,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:26:36,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:36,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:26:36,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:37,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:37,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268514082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:37,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:37,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-28 15:26:37,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369153826] [2022-01-28 15:26:37,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:37,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:26:37,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:37,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:26:37,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:26:37,458 INFO L87 Difference]: Start difference. First operand 187290 states and 695850 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:40,622 INFO L93 Difference]: Finished difference Result 191081 states and 707502 transitions. [2022-01-28 15:26:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-28 15:26:40,623 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:26:40,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:42,014 INFO L225 Difference]: With dead ends: 191081 [2022-01-28 15:26:42,014 INFO L226 Difference]: Without dead ends: 191000 [2022-01-28 15:26:42,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=499, Invalid=2257, Unknown=0, NotChecked=0, Total=2756 [2022-01-28 15:26:42,015 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 266 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:42,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 244 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:26:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191000 states. [2022-01-28 15:26:46,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191000 to 188159. [2022-01-28 15:26:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188159 states, 188158 states have (on average 3.7146334463589112) internal successors, (698938), 188158 states have internal predecessors, (698938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:48,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188159 states to 188159 states and 698938 transitions. [2022-01-28 15:26:48,169 INFO L78 Accepts]: Start accepts. Automaton has 188159 states and 698938 transitions. Word has length 25 [2022-01-28 15:26:48,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:48,169 INFO L470 AbstractCegarLoop]: Abstraction has 188159 states and 698938 transitions. [2022-01-28 15:26:48,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 188159 states and 698938 transitions. [2022-01-28 15:26:48,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:26:48,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:48,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:48,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-01-28 15:26:49,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-01-28 15:26:49,001 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:49,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:49,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1640437274, now seen corresponding path program 52 times [2022-01-28 15:26:49,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:49,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496715978] [2022-01-28 15:26:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:49,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:49,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:49,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496715978] [2022-01-28 15:26:49,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496715978] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:49,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950989666] [2022-01-28 15:26:49,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:26:49,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:49,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:49,103 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:26:49,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-28 15:26:49,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:26:49,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:49,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:26:49,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:49,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:49,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950989666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:49,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:49,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-28 15:26:49,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289807073] [2022-01-28 15:26:49,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:49,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:26:49,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:49,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:26:49,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:26:49,602 INFO L87 Difference]: Start difference. First operand 188159 states and 698938 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) [2022-01-28 15:26:54,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:54,682 INFO L93 Difference]: Finished difference Result 253841 states and 935453 transitions. [2022-01-28 15:26:54,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-28 15:26:54,682 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 [2022-01-28 15:26:54,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:56,232 INFO L225 Difference]: With dead ends: 253841 [2022-01-28 15:26:56,233 INFO L226 Difference]: Without dead ends: 252948 [2022-01-28 15:26:56,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2205 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1374, Invalid=5598, Unknown=0, NotChecked=0, Total=6972 [2022-01-28 15:26:56,233 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 507 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 1863 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:56,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 656 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1863 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 15:26:56,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252948 states. [2022-01-28 15:27:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252948 to 194110. [2022-01-28 15:27:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194110 states, 194109 states have (on average 3.7214039534488355) internal successors, (722358), 194109 states have internal predecessors, (722358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194110 states to 194110 states and 722358 transitions. [2022-01-28 15:27:04,088 INFO L78 Accepts]: Start accepts. Automaton has 194110 states and 722358 transitions. Word has length 25 [2022-01-28 15:27:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:27:04,088 INFO L470 AbstractCegarLoop]: Abstraction has 194110 states and 722358 transitions. [2022-01-28 15:27:04,088 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) [2022-01-28 15:27:04,088 INFO L276 IsEmpty]: Start isEmpty. Operand 194110 states and 722358 transitions. [2022-01-28 15:27:04,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:27:04,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:27:04,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:27:04,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-01-28 15:27:04,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:27:04,928 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:27:04,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:27:04,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1675972578, now seen corresponding path program 53 times [2022-01-28 15:27:04,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:27:04,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091562796] [2022-01-28 15:27:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:27:04,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:27:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:27:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:05,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:27:05,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091562796] [2022-01-28 15:27:05,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091562796] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:27:05,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490946863] [2022-01-28 15:27:05,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:27:05,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:27:05,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:27:05,032 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:27:05,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-28 15:27:05,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:27:05,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:27:05,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:27:05,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:27:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:05,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:27:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:05,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490946863] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:27:05,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:27:05,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-28 15:27:05,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266777999] [2022-01-28 15:27:05,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:27:05,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 15:27:05,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:27:05,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 15:27:05,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:27:05,534 INFO L87 Difference]: Start difference. First operand 194110 states and 722358 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 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) [2022-01-28 15:27:11,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:27:11,841 INFO L93 Difference]: Finished difference Result 310984 states and 1155268 transitions. [2022-01-28 15:27:11,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-28 15:27:11,842 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 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 25 [2022-01-28 15:27:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:27:13,674 INFO L225 Difference]: With dead ends: 310984 [2022-01-28 15:27:13,675 INFO L226 Difference]: Without dead ends: 309692 [2022-01-28 15:27:13,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3703 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2184, Invalid=8528, Unknown=0, NotChecked=0, Total=10712 [2022-01-28 15:27:13,675 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 636 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:27:13,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 599 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 1762 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 15:27:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309692 states. [2022-01-28 15:27:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309692 to 196205. [2022-01-28 15:27:21,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196205 states, 196204 states have (on average 3.72772216672443) internal successors, (731394), 196204 states have internal predecessors, (731394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196205 states to 196205 states and 731394 transitions. [2022-01-28 15:27:23,239 INFO L78 Accepts]: Start accepts. Automaton has 196205 states and 731394 transitions. Word has length 25 [2022-01-28 15:27:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:27:23,239 INFO L470 AbstractCegarLoop]: Abstraction has 196205 states and 731394 transitions. [2022-01-28 15:27:23,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 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) [2022-01-28 15:27:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 196205 states and 731394 transitions. [2022-01-28 15:27:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:27:24,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:27:24,111 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:27:24,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-28 15:27:24,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-28 15:27:24,311 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:27:24,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:27:24,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1008596646, now seen corresponding path program 54 times [2022-01-28 15:27:24,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:27:24,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901323812] [2022-01-28 15:27:24,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:27:24,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:27:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:27:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:24,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:27:24,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901323812] [2022-01-28 15:27:24,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901323812] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:27:24,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910311119] [2022-01-28 15:27:24,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:27:24,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:27:24,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:27:24,382 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:27:24,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-28 15:27:24,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:27:24,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:27:24,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:27:24,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:27:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:24,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:27:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:24,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910311119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:27:24,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:27:24,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-28 15:27:24,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602824914] [2022-01-28 15:27:24,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:27:24,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:27:24,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:27:24,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:27:24,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:27:24,742 INFO L87 Difference]: Start difference. First operand 196205 states and 731394 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:28,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:27:28,005 INFO L93 Difference]: Finished difference Result 204436 states and 758376 transitions. [2022-01-28 15:27:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-28 15:27:28,005 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:27:28,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:27:29,320 INFO L225 Difference]: With dead ends: 204436 [2022-01-28 15:27:29,320 INFO L226 Difference]: Without dead ends: 204231 [2022-01-28 15:27:29,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=619, Invalid=2687, Unknown=0, NotChecked=0, Total=3306 [2022-01-28 15:27:29,320 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 312 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:27:29,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 442 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 15:27:29,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204231 states. [2022-01-28 15:27:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204231 to 200447. [2022-01-28 15:27:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200447 states, 200446 states have (on average 3.7241102341777834) internal successors, (746483), 200446 states have internal predecessors, (746483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:36,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200447 states to 200447 states and 746483 transitions. [2022-01-28 15:27:36,817 INFO L78 Accepts]: Start accepts. Automaton has 200447 states and 746483 transitions. Word has length 25 [2022-01-28 15:27:36,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:27:36,817 INFO L470 AbstractCegarLoop]: Abstraction has 200447 states and 746483 transitions. [2022-01-28 15:27:36,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:36,817 INFO L276 IsEmpty]: Start isEmpty. Operand 200447 states and 746483 transitions. [2022-01-28 15:27:37,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:27:37,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:27:37,180 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:27:37,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-28 15:27:37,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-28 15:27:37,387 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:27:37,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:27:37,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2130317278, now seen corresponding path program 55 times [2022-01-28 15:27:37,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:27:37,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090973205] [2022-01-28 15:27:37,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:27:37,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:27:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:27:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:37,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:27:37,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090973205] [2022-01-28 15:27:37,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090973205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:27:37,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244673241] [2022-01-28 15:27:37,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:27:37,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:27:37,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:27:37,475 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:27:37,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-28 15:27:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:27:37,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:27:37,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:27:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:37,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:27:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:37,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244673241] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:27:37,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:27:37,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-28 15:27:37,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175785984] [2022-01-28 15:27:37,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:27:37,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:27:37,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:27:37,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:27:37,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:27:37,869 INFO L87 Difference]: Start difference. First operand 200447 states and 746483 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:41,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:27:41,799 INFO L93 Difference]: Finished difference Result 204459 states and 758079 transitions. [2022-01-28 15:27:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-28 15:27:41,800 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:27:41,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:27:43,050 INFO L225 Difference]: With dead ends: 204459 [2022-01-28 15:27:43,050 INFO L226 Difference]: Without dead ends: 204189 [2022-01-28 15:27:43,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=771, Invalid=3519, Unknown=0, NotChecked=0, Total=4290 [2022-01-28 15:27:43,050 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 312 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:27:43,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 543 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1871 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-28 15:27:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204189 states. [2022-01-28 15:27:48,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204189 to 200393. [2022-01-28 15:27:49,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200393 states, 200392 states have (on average 3.724155654916364) internal successors, (746291), 200392 states have internal predecessors, (746291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200393 states to 200393 states and 746291 transitions. [2022-01-28 15:27:51,117 INFO L78 Accepts]: Start accepts. Automaton has 200393 states and 746291 transitions. Word has length 25 [2022-01-28 15:27:51,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:27:51,118 INFO L470 AbstractCegarLoop]: Abstraction has 200393 states and 746291 transitions. [2022-01-28 15:27:51,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:51,118 INFO L276 IsEmpty]: Start isEmpty. Operand 200393 states and 746291 transitions. [2022-01-28 15:27:51,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:27:51,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:27:51,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:27:51,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-28 15:27:51,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:27:51,669 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:27:51,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:27:51,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1128871624, now seen corresponding path program 56 times [2022-01-28 15:27:51,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:27:51,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367695667] [2022-01-28 15:27:51,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:27:51,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:27:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:27:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:51,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:27:51,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367695667] [2022-01-28 15:27:51,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367695667] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:27:51,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082130476] [2022-01-28 15:27:51,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:27:51,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:27:51,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:27:51,782 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:27:51,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-28 15:27:51,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:27:51,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:27:51,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:27:51,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:27:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:51,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:27:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:52,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082130476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:27:52,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:27:52,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-28 15:27:52,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819744763] [2022-01-28 15:27:52,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:27:52,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:27:52,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:27:52,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:27:52,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:27:52,331 INFO L87 Difference]: Start difference. First operand 200393 states and 746291 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:56,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:27:56,411 INFO L93 Difference]: Finished difference Result 260581 states and 962937 transitions. [2022-01-28 15:27:56,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-28 15:27:56,412 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:27:56,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:27:58,076 INFO L225 Difference]: With dead ends: 260581 [2022-01-28 15:27:58,077 INFO L226 Difference]: Without dead ends: 260198 [2022-01-28 15:27:58,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=844, Invalid=3316, Unknown=0, NotChecked=0, Total=4160 [2022-01-28 15:27:58,077 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 370 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:27:58,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 477 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 15:27:58,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260198 states. [2022-01-28 15:28:04,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260198 to 200725. [2022-01-28 15:28:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200725 states, 200724 states have (on average 3.7237201331181122) internal successors, (747440), 200724 states have internal predecessors, (747440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200725 states to 200725 states and 747440 transitions. [2022-01-28 15:28:05,687 INFO L78 Accepts]: Start accepts. Automaton has 200725 states and 747440 transitions. Word has length 25 [2022-01-28 15:28:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:28:05,687 INFO L470 AbstractCegarLoop]: Abstraction has 200725 states and 747440 transitions. [2022-01-28 15:28:05,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 200725 states and 747440 transitions. [2022-01-28 15:28:06,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:28:06,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:28:06,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:28:06,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-28 15:28:06,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:28:06,565 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:28:06,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:28:06,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1097129480, now seen corresponding path program 57 times [2022-01-28 15:28:06,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:28:06,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773397254] [2022-01-28 15:28:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:28:06,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:28:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:28:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:06,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:28:06,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773397254] [2022-01-28 15:28:06,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773397254] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:28:06,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912170230] [2022-01-28 15:28:06,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:28:06,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:28:06,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:28:06,686 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:28:06,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-28 15:28:06,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:28:06,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:28:06,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 15:28:06,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:28:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:28:06,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:28:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:07,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912170230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:28:07,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:28:07,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-28 15:28:07,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201265839] [2022-01-28 15:28:07,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:28:07,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:28:07,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:28:07,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:28:07,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:28:07,302 INFO L87 Difference]: Start difference. First operand 200725 states and 747440 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:11,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:28:11,264 INFO L93 Difference]: Finished difference Result 280878 states and 1041668 transitions. [2022-01-28 15:28:11,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-28 15:28:11,265 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:28:11,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:28:12,914 INFO L225 Difference]: With dead ends: 280878 [2022-01-28 15:28:12,914 INFO L226 Difference]: Without dead ends: 280124 [2022-01-28 15:28:12,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=679, Invalid=2291, Unknown=0, NotChecked=0, Total=2970 [2022-01-28 15:28:12,915 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 342 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:28:12,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 314 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 15:28:13,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280124 states. [2022-01-28 15:28:20,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280124 to 217378. [2022-01-28 15:28:20,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217378 states, 217377 states have (on average 3.730781085395419) internal successors, (810986), 217377 states have internal predecessors, (810986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:22,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217378 states to 217378 states and 810986 transitions. [2022-01-28 15:28:22,147 INFO L78 Accepts]: Start accepts. Automaton has 217378 states and 810986 transitions. Word has length 25 [2022-01-28 15:28:22,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:28:22,147 INFO L470 AbstractCegarLoop]: Abstraction has 217378 states and 810986 transitions. [2022-01-28 15:28:22,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:22,147 INFO L276 IsEmpty]: Start isEmpty. Operand 217378 states and 810986 transitions. [2022-01-28 15:28:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:28:22,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:28:22,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:28:22,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-01-28 15:28:22,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-01-28 15:28:22,740 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:28:22,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:28:22,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1172147670, now seen corresponding path program 58 times [2022-01-28 15:28:22,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:28:22,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342116563] [2022-01-28 15:28:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:28:22,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:28:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:28:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:22,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:28:22,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342116563] [2022-01-28 15:28:22,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342116563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:28:22,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368046632] [2022-01-28 15:28:22,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:28:22,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:28:22,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:28:22,844 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:28:22,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-28 15:28:22,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:28:22,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:28:22,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 15:28:22,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:28:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:23,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:28:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:23,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368046632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:28:23,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:28:23,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-01-28 15:28:23,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390895065] [2022-01-28 15:28:23,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:28:23,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:28:23,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:28:23,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:28:23,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:28:23,597 INFO L87 Difference]: Start difference. First operand 217378 states and 810986 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-01-28 15:28:29,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:28:29,576 INFO L93 Difference]: Finished difference Result 337389 states and 1244630 transitions. [2022-01-28 15:28:29,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-28 15:28:29,577 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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 25 [2022-01-28 15:28:29,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:28:31,557 INFO L225 Difference]: With dead ends: 337389 [2022-01-28 15:28:31,557 INFO L226 Difference]: Without dead ends: 337147 [2022-01-28 15:28:31,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3858 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2065, Invalid=8035, Unknown=0, NotChecked=0, Total=10100 [2022-01-28 15:28:31,558 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 763 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:28:31,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 457 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 15:28:31,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337147 states. [2022-01-28 15:28:39,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337147 to 233074. [2022-01-28 15:28:40,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233074 states, 233073 states have (on average 3.737404160928121) internal successors, (871088), 233073 states have internal predecessors, (871088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:41,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233074 states to 233074 states and 871088 transitions. [2022-01-28 15:28:41,733 INFO L78 Accepts]: Start accepts. Automaton has 233074 states and 871088 transitions. Word has length 25 [2022-01-28 15:28:41,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:28:41,733 INFO L470 AbstractCegarLoop]: Abstraction has 233074 states and 871088 transitions. [2022-01-28 15:28:41,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-01-28 15:28:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 233074 states and 871088 transitions. [2022-01-28 15:28:42,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:28:42,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:28:42,438 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:28:42,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-01-28 15:28:42,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:28:42,653 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:28:42,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:28:42,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1446374600, now seen corresponding path program 59 times [2022-01-28 15:28:42,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:28:42,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453287120] [2022-01-28 15:28:42,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:28:42,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:28:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:28:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:42,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:28:42,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453287120] [2022-01-28 15:28:42,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453287120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:28:42,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358356485] [2022-01-28 15:28:42,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:28:42,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:28:42,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:28:42,747 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:28:42,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-28 15:28:42,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:28:42,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:28:42,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 15:28:42,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:28:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:42,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:28:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:43,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358356485] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:28:43,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:28:43,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-28 15:28:43,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620957205] [2022-01-28 15:28:43,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:28:43,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:28:43,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:28:43,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:28:43,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:28:43,194 INFO L87 Difference]: Start difference. First operand 233074 states and 871088 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:28:48,264 INFO L93 Difference]: Finished difference Result 302992 states and 1122975 transitions. [2022-01-28 15:28:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-28 15:28:48,264 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-01-28 15:28:48,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:28:50,025 INFO L225 Difference]: With dead ends: 302992 [2022-01-28 15:28:50,025 INFO L226 Difference]: Without dead ends: 302722 [2022-01-28 15:28:50,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=760, Invalid=3022, Unknown=0, NotChecked=0, Total=3782 [2022-01-28 15:28:50,026 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 409 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:28:50,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 287 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 15:28:50,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302722 states. [2022-01-28 15:28:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302722 to 232998. [2022-01-28 15:28:57,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232998 states, 232997 states have (on average 3.736451542294536) internal successors, (870582), 232997 states have internal predecessors, (870582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:59,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232998 states to 232998 states and 870582 transitions. [2022-01-28 15:28:59,538 INFO L78 Accepts]: Start accepts. Automaton has 232998 states and 870582 transitions. Word has length 25 [2022-01-28 15:28:59,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:28:59,538 INFO L470 AbstractCegarLoop]: Abstraction has 232998 states and 870582 transitions. [2022-01-28 15:28:59,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:59,538 INFO L276 IsEmpty]: Start isEmpty. Operand 232998 states and 870582 transitions. [2022-01-28 15:28:59,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:28:59,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:28:59,999 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:29:00,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-01-28 15:29:00,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:29:00,200 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:29:00,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:29:00,200 INFO L85 PathProgramCache]: Analyzing trace with hash 207890960, now seen corresponding path program 23 times [2022-01-28 15:29:00,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:29:00,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235361953] [2022-01-28 15:29:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:29:00,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:29:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:29:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:00,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:29:00,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235361953] [2022-01-28 15:29:00,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235361953] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:29:00,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717791082] [2022-01-28 15:29:00,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:29:00,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:29:00,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:29:00,257 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:29:00,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-28 15:29:00,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:29:00,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:29:00,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 15:29:00,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:29:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:00,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:29:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:00,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717791082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:29:00,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:29:00,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-28 15:29:00,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829105198] [2022-01-28 15:29:00,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:29:00,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:29:00,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:29:00,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:29:00,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:29:00,433 INFO L87 Difference]: Start difference. First operand 232998 states and 870582 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:07,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:29:07,463 INFO L93 Difference]: Finished difference Result 692833 states and 2591381 transitions. [2022-01-28 15:29:07,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-28 15:29:07,463 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:29:07,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:29:12,360 INFO L225 Difference]: With dead ends: 692833 [2022-01-28 15:29:12,361 INFO L226 Difference]: Without dead ends: 692833 [2022-01-28 15:29:12,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 15:29:12,361 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 251 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:29:12,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 121 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:29:13,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692833 states. [2022-01-28 15:29:35,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692833 to 397517. [2022-01-28 15:29:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397517 states, 397516 states have (on average 3.750986123828978) internal successors, (1491077), 397516 states have internal predecessors, (1491077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397517 states to 397517 states and 1491077 transitions. [2022-01-28 15:29:38,846 INFO L78 Accepts]: Start accepts. Automaton has 397517 states and 1491077 transitions. Word has length 25 [2022-01-28 15:29:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:29:38,846 INFO L470 AbstractCegarLoop]: Abstraction has 397517 states and 1491077 transitions. [2022-01-28 15:29:38,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 397517 states and 1491077 transitions. [2022-01-28 15:29:39,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:29:39,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:29:39,881 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:29:39,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-28 15:29:40,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-01-28 15:29:40,081 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:29:40,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:29:40,082 INFO L85 PathProgramCache]: Analyzing trace with hash 693695064, now seen corresponding path program 24 times [2022-01-28 15:29:40,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:29:40,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202815934] [2022-01-28 15:29:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:29:40,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:29:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:29:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:40,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:29:40,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202815934] [2022-01-28 15:29:40,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202815934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:29:40,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695250474] [2022-01-28 15:29:40,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:29:40,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:29:40,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:29:40,121 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:29:40,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-28 15:29:40,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 15:29:40,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:29:40,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 15:29:40,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:29:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:40,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:29:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:40,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695250474] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:29:40,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:29:40,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-28 15:29:40,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837249691] [2022-01-28 15:29:40,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:29:40,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:29:40,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:29:40,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:29:40,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:29:40,295 INFO L87 Difference]: Start difference. First operand 397517 states and 1491077 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:29:53,007 INFO L93 Difference]: Finished difference Result 979403 states and 3667256 transitions. [2022-01-28 15:29:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-28 15:29:53,007 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:29:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:30:00,415 INFO L225 Difference]: With dead ends: 979403 [2022-01-28 15:30:00,416 INFO L226 Difference]: Without dead ends: 979403 [2022-01-28 15:30:00,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=882, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 15:30:00,416 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 146 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:30:00,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 91 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:30:01,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979403 states.