/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 17:43:30,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 17:43:30,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 17:43:30,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 17:43:30,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 17:43:30,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 17:43:30,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 17:43:30,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 17:43:30,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 17:43:30,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 17:43:30,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 17:43:30,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-18 17:43:30,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 17:43:30,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 17:43:30,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 17:43:30,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 17:43:30,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 17:43:30,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 17:43:30,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 17:43:30,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 17:43:30,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 17:43:30,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 17:43:30,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 17:43:30,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 17:43:30,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-18 17:43:30,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-18 17:43:30,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-18 17:43:30,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-18 17:43:30,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-18 17:43:30,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-18 17:43:30,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-18 17:43:30,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-18 17:43:30,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-18 17:43:30,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-18 17:43:30,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-18 17:43:30,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-18 17:43:30,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-18 17:43:30,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-18 17:43:30,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 17:43:30,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 17:43:30,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 17:43:30,436 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-Separate.epf [2022-01-18 17:43:30,459 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 17:43:30,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 17:43:30,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 17:43:30,460 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 17:43:30,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 17:43:30,461 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 17:43:30,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 17:43:30,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 17:43:30,461 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 17:43:30,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 17:43:30,462 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 17:43:30,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 17:43:30,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 17:43:30,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 17:43:30,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 17:43:30,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 17:43:30,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 17:43:30,463 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 17:43:30,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 17:43:30,463 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 17:43:30,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 17:43:30,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 17:43:30,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 17:43:30,463 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 17:43:30,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 17:43:30,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:43:30,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 17:43:30,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 17:43:30,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 17:43:30,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 17:43:30,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 17:43:30,464 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 17:43:30,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 17:43:30,464 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 17:43:30,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 17:43:30,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 17:43:30,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 17:43:30,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 17:43:30,661 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 17:43:30,663 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 17:43:30,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl [2022-01-18 17:43:30,664 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl' [2022-01-18 17:43:30,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 17:43:30,686 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 17:43:30,687 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 17:43:30,687 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 17:43:30,687 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 17:43:30,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:43:30" (1/1) ... [2022-01-18 17:43:30,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:43:30" (1/1) ... [2022-01-18 17:43:30,704 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 17:43:30,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 17:43:30,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 17:43:30,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 17:43:30,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 17:43:30,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:43:30" (1/1) ... [2022-01-18 17:43:30,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:43:30" (1/1) ... [2022-01-18 17:43:30,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:43:30" (1/1) ... [2022-01-18 17:43:30,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:43:30" (1/1) ... [2022-01-18 17:43:30,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:43:30" (1/1) ... [2022-01-18 17:43:30,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:43:30" (1/1) ... [2022-01-18 17:43:30,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:43:30" (1/1) ... [2022-01-18 17:43:30,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 17:43:30,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 17:43:30,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 17:43:30,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 17:43:30,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:43:30" (1/1) ... [2022-01-18 17:43:30,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:43:30,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:30,750 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 17:43:30,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 17:43:30,776 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 17:43:30,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 17:43:30,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 17:43:30,777 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 17:43:30,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 17:43:30,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 17:43:30,777 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 17:43:30,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 17:43:30,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 17:43:30,777 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 17:43:30,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 17:43:30,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 17:43:30,778 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 17:43:30,811 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 17:43:30,813 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 17:43:30,887 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 17:43:30,896 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 17:43:30,896 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 17:43:30,898 INFO L202 PluginConnector]: Adding new model sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:43:30 BoogieIcfgContainer [2022-01-18 17:43:30,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 17:43:30,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 17:43:30,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 17:43:30,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 17:43:30,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:43:30" (1/2) ... [2022-01-18 17:43:30,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@239370e9 and model type sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:43:30, skipping insertion in model container [2022-01-18 17:43:30,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:43:30" (2/2) ... [2022-01-18 17:43:30,921 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-fun-alt.wvr.bpl [2022-01-18 17:43:30,924 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 17:43:30,924 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 17:43:30,924 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 17:43:30,924 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 17:43:30,950 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 17:43:30,980 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 17:43:30,998 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 17:43:30,998 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 17:43:31,005 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-01-18 17:43:31,058 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:31,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 17:43:31,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:31,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:31,066 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:31,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:31,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1562983410, now seen corresponding path program 1 times [2022-01-18 17:43:31,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:31,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829330861] [2022-01-18 17:43:31,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:31,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:31,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:31,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829330861] [2022-01-18 17:43:31,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829330861] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:43:31,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:43:31,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 17:43:31,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465273362] [2022-01-18 17:43:31,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:43:31,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 17:43:31,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:31,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 17:43:31,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 17:43:31,291 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:31,356 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-01-18 17:43:31,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 17:43:31,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 17:43:31,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:31,365 INFO L225 Difference]: With dead ends: 217 [2022-01-18 17:43:31,365 INFO L226 Difference]: Without dead ends: 202 [2022-01-18 17:43:31,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 17:43:31,368 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 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 [2022-01-18 17:43:31,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:43:31,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-18 17:43:31,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-01-18 17:43:31,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:31,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-01-18 17:43:31,447 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-01-18 17:43:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:31,448 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-01-18 17:43:31,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:31,448 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-01-18 17:43:31,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 17:43:31,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:31,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:31,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 17:43:31,450 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:31,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:31,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1322843154, now seen corresponding path program 1 times [2022-01-18 17:43:31,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:31,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081237890] [2022-01-18 17:43:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:31,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:31,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:31,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081237890] [2022-01-18 17:43:31,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081237890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:43:31,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:43:31,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:43:31,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161617207] [2022-01-18 17:43:31,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:43:31,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 17:43:31,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:31,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 17:43:31,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 17:43:31,519 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:31,571 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-01-18 17:43:31,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 17:43:31,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 17:43:31,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:31,572 INFO L225 Difference]: With dead ends: 158 [2022-01-18 17:43:31,573 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 17:43:31,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:43:31,574 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:31,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:43:31,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 17:43:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-01-18 17:43:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-01-18 17:43:31,590 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-01-18 17:43:31,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:31,590 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-01-18 17:43:31,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:31,590 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-01-18 17:43:31,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 17:43:31,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:31,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:31,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 17:43:31,592 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:31,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:31,592 INFO L85 PathProgramCache]: Analyzing trace with hash 286241452, now seen corresponding path program 1 times [2022-01-18 17:43:31,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:31,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048937642] [2022-01-18 17:43:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:31,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:31,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:31,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048937642] [2022-01-18 17:43:31,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048937642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:43:31,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:43:31,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:43:31,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880504393] [2022-01-18 17:43:31,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:43:31,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:43:31,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:31,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:43:31,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:43:31,653 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:31,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:31,702 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-01-18 17:43:31,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 17:43:31,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 17:43:31,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:31,704 INFO L225 Difference]: With dead ends: 183 [2022-01-18 17:43:31,705 INFO L226 Difference]: Without dead ends: 183 [2022-01-18 17:43:31,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:43:31,709 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 76 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:31,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:43:31,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-18 17:43:31,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-01-18 17:43:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-01-18 17:43:31,720 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-01-18 17:43:31,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:31,720 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-01-18 17:43:31,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:31,720 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-01-18 17:43:31,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:43:31,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:31,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:31,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 17:43:31,721 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:31,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:31,722 INFO L85 PathProgramCache]: Analyzing trace with hash -867206516, now seen corresponding path program 1 times [2022-01-18 17:43:31,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:31,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103852184] [2022-01-18 17:43:31,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:31,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:31,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:31,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103852184] [2022-01-18 17:43:31,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103852184] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:31,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951989255] [2022-01-18 17:43:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:31,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:31,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:31,952 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:31,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 17:43:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:31,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:43:31,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:32,249 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 17:43:32,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-01-18 17:43:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:32,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:32,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:32,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 17:43:32,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 17:43:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:32,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951989255] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:32,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:32,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:43:32,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904309079] [2022-01-18 17:43:32,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:32,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:43:32,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:32,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:43:32,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:43:32,570 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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) [2022-01-18 17:43:32,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:32,884 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-01-18 17:43:32,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 17:43:32,884 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 22 [2022-01-18 17:43:32,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:32,886 INFO L225 Difference]: With dead ends: 366 [2022-01-18 17:43:32,886 INFO L226 Difference]: Without dead ends: 351 [2022-01-18 17:43:32,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:43:32,887 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 195 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:32,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 58 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:43:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-18 17:43:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-01-18 17:43:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:32,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-01-18 17:43:32,894 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-01-18 17:43:32,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:32,894 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-01-18 17:43:32,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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) [2022-01-18 17:43:32,894 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-01-18 17:43:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:43:32,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:32,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:32,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:33,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:33,104 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1035015608, now seen corresponding path program 2 times [2022-01-18 17:43:33,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:33,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115282357] [2022-01-18 17:43:33,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:33,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:33,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:33,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115282357] [2022-01-18 17:43:33,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115282357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:33,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423296294] [2022-01-18 17:43:33,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:43:33,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:33,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:33,266 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:33,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 17:43:33,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:43:33,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:33,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 17:43:33,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:33,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:33,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 17:43:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:33,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:33,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:33,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 17:43:33,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 17:43:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:33,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423296294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:33,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:33,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2022-01-18 17:43:33,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941758838] [2022-01-18 17:43:33,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:33,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:43:33,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:33,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:43:33,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:43:33,693 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:34,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:34,242 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-01-18 17:43:34,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 17:43:34,243 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 17:43:34,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:34,245 INFO L225 Difference]: With dead ends: 478 [2022-01-18 17:43:34,245 INFO L226 Difference]: Without dead ends: 463 [2022-01-18 17:43:34,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:43:34,246 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 277 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:34,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 109 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:43:34,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-18 17:43:34,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-01-18 17:43:34,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:34,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-01-18 17:43:34,251 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-01-18 17:43:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:34,252 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-01-18 17:43:34,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-01-18 17:43:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:43:34,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:34,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:34,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:34,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:34,467 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash -736242160, now seen corresponding path program 3 times [2022-01-18 17:43:34,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:34,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191538948] [2022-01-18 17:43:34,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:34,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:34,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:34,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191538948] [2022-01-18 17:43:34,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191538948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:34,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161450238] [2022-01-18 17:43:34,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:43:34,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:34,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:34,575 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:34,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 17:43:34,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:43:34,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:34,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:43:34,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:34,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 17:43:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:34,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:34,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:34,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 17:43:34,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 17:43:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:34,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161450238] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:34,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:34,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 17:43:34,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733618728] [2022-01-18 17:43:34,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:34,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:43:34,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:34,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:43:34,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:43:34,915 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:35,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:35,229 INFO L93 Difference]: Finished difference Result 418 states and 1203 transitions. [2022-01-18 17:43:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:43:35,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 17:43:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:35,231 INFO L225 Difference]: With dead ends: 418 [2022-01-18 17:43:35,231 INFO L226 Difference]: Without dead ends: 403 [2022-01-18 17:43:35,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:43:35,231 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 104 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:35,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 89 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:43:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-18 17:43:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 241. [2022-01-18 17:43:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:35,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-01-18 17:43:35,237 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-01-18 17:43:35,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:35,237 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-01-18 17:43:35,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:35,237 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-01-18 17:43:35,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:43:35,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:35,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:35,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:35,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:35,443 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:35,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:35,444 INFO L85 PathProgramCache]: Analyzing trace with hash 834583440, now seen corresponding path program 4 times [2022-01-18 17:43:35,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:35,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666893993] [2022-01-18 17:43:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:35,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:35,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:35,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666893993] [2022-01-18 17:43:35,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666893993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:35,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108245854] [2022-01-18 17:43:35,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:43:35,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:35,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:35,573 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:35,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 17:43:35,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:43:35,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:35,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:43:35,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:35,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:35,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2022-01-18 17:43:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:35,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:35,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:35,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 17:43:35,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 17:43:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:36,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108245854] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:36,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:36,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 17:43:36,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177703244] [2022-01-18 17:43:36,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:36,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:43:36,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:43:36,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:43:36,012 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:36,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:36,217 INFO L93 Difference]: Finished difference Result 374 states and 1089 transitions. [2022-01-18 17:43:36,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:43:36,217 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 17:43:36,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:36,219 INFO L225 Difference]: With dead ends: 374 [2022-01-18 17:43:36,219 INFO L226 Difference]: Without dead ends: 359 [2022-01-18 17:43:36,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:43:36,220 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:36,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 113 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 195 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2022-01-18 17:43:36,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-18 17:43:36,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 245. [2022-01-18 17:43:36,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.9262295081967213) internal successors, (714), 244 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:36,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 714 transitions. [2022-01-18 17:43:36,226 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 714 transitions. Word has length 22 [2022-01-18 17:43:36,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:36,226 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 714 transitions. [2022-01-18 17:43:36,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:36,226 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 714 transitions. [2022-01-18 17:43:36,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:43:36,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:36,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:36,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:36,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:36,434 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:36,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1412835854, now seen corresponding path program 5 times [2022-01-18 17:43:36,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:36,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34412358] [2022-01-18 17:43:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:36,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:36,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:36,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34412358] [2022-01-18 17:43:36,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34412358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:36,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249123516] [2022-01-18 17:43:36,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:43:36,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:36,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:36,549 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:36,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 17:43:36,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:43:36,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:36,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 17:43:36,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:36,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:36,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 17:43:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:36,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:36,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:36,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 17:43:36,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 17:43:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:37,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249123516] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:37,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:37,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-01-18 17:43:37,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97823186] [2022-01-18 17:43:37,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:37,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:43:37,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:37,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:43:37,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:43:37,113 INFO L87 Difference]: Start difference. First operand 245 states and 714 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:39,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:39,628 INFO L93 Difference]: Finished difference Result 992 states and 3011 transitions. [2022-01-18 17:43:39,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 17:43:39,628 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 17:43:39,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:39,632 INFO L225 Difference]: With dead ends: 992 [2022-01-18 17:43:39,632 INFO L226 Difference]: Without dead ends: 977 [2022-01-18 17:43:39,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=997, Invalid=3973, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 17:43:39,634 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 332 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:39,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 321 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 967 Invalid, 0 Unknown, 118 Unchecked, 0.5s Time] [2022-01-18 17:43:39,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-01-18 17:43:39,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 255. [2022-01-18 17:43:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.0) internal successors, (762), 254 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 762 transitions. [2022-01-18 17:43:39,645 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 762 transitions. Word has length 22 [2022-01-18 17:43:39,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:39,645 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 762 transitions. [2022-01-18 17:43:39,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:39,645 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 762 transitions. [2022-01-18 17:43:39,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:43:39,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:39,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:39,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:39,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:39,855 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:39,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:39,856 INFO L85 PathProgramCache]: Analyzing trace with hash 151290546, now seen corresponding path program 6 times [2022-01-18 17:43:39,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:39,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60475266] [2022-01-18 17:43:39,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:39,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:39,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:39,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60475266] [2022-01-18 17:43:39,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60475266] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:39,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674810071] [2022-01-18 17:43:39,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:43:39,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:39,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:39,961 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:39,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 17:43:39,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:43:39,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:39,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:43:39,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:40,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:40,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 17:43:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:40,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:40,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:40,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 17:43:40,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 17:43:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:40,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674810071] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:40,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:40,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-01-18 17:43:40,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600334484] [2022-01-18 17:43:40,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:40,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:43:40,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:40,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:43:40,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:43:40,351 INFO L87 Difference]: Start difference. First operand 255 states and 762 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2022-01-18 17:43:41,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:41,029 INFO L93 Difference]: Finished difference Result 597 states and 1769 transitions. [2022-01-18 17:43:41,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 17:43:41,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 22 [2022-01-18 17:43:41,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:41,032 INFO L225 Difference]: With dead ends: 597 [2022-01-18 17:43:41,032 INFO L226 Difference]: Without dead ends: 582 [2022-01-18 17:43:41,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=824, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 17:43:41,033 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 186 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:41,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 128 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:43:41,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-18 17:43:41,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 258. [2022-01-18 17:43:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9961089494163424) internal successors, (770), 257 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:41,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 770 transitions. [2022-01-18 17:43:41,040 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 770 transitions. Word has length 22 [2022-01-18 17:43:41,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:41,040 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 770 transitions. [2022-01-18 17:43:41,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2022-01-18 17:43:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 770 transitions. [2022-01-18 17:43:41,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:41,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:41,042 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, 1] [2022-01-18 17:43:41,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:41,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:41,245 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:41,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1176864790, now seen corresponding path program 7 times [2022-01-18 17:43:41,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:41,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027821232] [2022-01-18 17:43:41,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:41,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:41,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:41,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027821232] [2022-01-18 17:43:41,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027821232] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:41,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074616242] [2022-01-18 17:43:41,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:43:41,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:41,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:41,290 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:41,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 17:43:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:41,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:41,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:41,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:41,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074616242] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:41,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:41,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 17:43:41,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802284506] [2022-01-18 17:43:41,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:41,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:43:41,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:41,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:43:41,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:43:41,486 INFO L87 Difference]: Start difference. First operand 258 states and 770 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) 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) [2022-01-18 17:43:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:42,249 INFO L93 Difference]: Finished difference Result 1123 states and 3194 transitions. [2022-01-18 17:43:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 17:43:42,249 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) 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 24 [2022-01-18 17:43:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:42,253 INFO L225 Difference]: With dead ends: 1123 [2022-01-18 17:43:42,253 INFO L226 Difference]: Without dead ends: 1123 [2022-01-18 17:43:42,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 17:43:42,255 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 270 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:42,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 214 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:43:42,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-01-18 17:43:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 322. [2022-01-18 17:43:42,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.196261682242991) internal successors, (1026), 321 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:42,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1026 transitions. [2022-01-18 17:43:42,268 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1026 transitions. Word has length 24 [2022-01-18 17:43:42,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:42,268 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1026 transitions. [2022-01-18 17:43:42,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) 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) [2022-01-18 17:43:42,268 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1026 transitions. [2022-01-18 17:43:42,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:42,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:42,269 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, 1] [2022-01-18 17:43:42,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:42,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:42,487 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:42,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:42,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2141783662, now seen corresponding path program 8 times [2022-01-18 17:43:42,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:42,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790071193] [2022-01-18 17:43:42,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:42,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:42,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:42,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790071193] [2022-01-18 17:43:42,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790071193] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:42,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586154317] [2022-01-18 17:43:42,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:43:42,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:42,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:42,545 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:42,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 17:43:42,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:43:42,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:42,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:42,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:42,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:42,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586154317] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:42,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:42,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:43:42,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867838055] [2022-01-18 17:43:42,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:42,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:43:42,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:42,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:43:42,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:43:42,802 INFO L87 Difference]: Start difference. First operand 322 states and 1026 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-01-18 17:43:44,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:44,477 INFO L93 Difference]: Finished difference Result 1814 states and 5087 transitions. [2022-01-18 17:43:44,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 17:43:44,477 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 24 [2022-01-18 17:43:44,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:44,484 INFO L225 Difference]: With dead ends: 1814 [2022-01-18 17:43:44,484 INFO L226 Difference]: Without dead ends: 1814 [2022-01-18 17:43:44,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 17:43:44,487 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 475 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:44,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 315 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:43:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2022-01-18 17:43:44,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 315. [2022-01-18 17:43:44,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:44,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-01-18 17:43:44,503 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-01-18 17:43:44,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:44,503 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-01-18 17:43:44,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-01-18 17:43:44,503 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-01-18 17:43:44,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:44,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:44,504 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, 1] [2022-01-18 17:43:44,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-18 17:43:44,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-18 17:43:44,719 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:44,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:44,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1586231554, now seen corresponding path program 9 times [2022-01-18 17:43:44,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:44,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16431806] [2022-01-18 17:43:44,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:44,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:44,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:44,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16431806] [2022-01-18 17:43:44,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16431806] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:44,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545206180] [2022-01-18 17:43:44,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:43:44,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:44,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:44,767 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:44,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 17:43:44,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:43:44,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:44,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:44,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:44,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:45,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545206180] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:45,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:45,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:43:45,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237006809] [2022-01-18 17:43:45,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:45,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:43:45,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:45,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:43:45,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:43:45,004 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-01-18 17:43:45,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:45,843 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-01-18 17:43:45,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 17:43:45,843 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 24 [2022-01-18 17:43:45,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:45,848 INFO L225 Difference]: With dead ends: 1470 [2022-01-18 17:43:45,848 INFO L226 Difference]: Without dead ends: 1470 [2022-01-18 17:43:45,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:43:45,850 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 429 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:45,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 212 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:43:45,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-01-18 17:43:45,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-01-18 17:43:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-01-18 17:43:45,862 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-01-18 17:43:45,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:45,862 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-01-18 17:43:45,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-01-18 17:43:45,862 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-01-18 17:43:45,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:45,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:45,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:45,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:46,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:46,079 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:46,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:46,079 INFO L85 PathProgramCache]: Analyzing trace with hash -650092882, now seen corresponding path program 1 times [2022-01-18 17:43:46,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:46,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471728610] [2022-01-18 17:43:46,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:46,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:46,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:46,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471728610] [2022-01-18 17:43:46,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471728610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:46,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561894000] [2022-01-18 17:43:46,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:46,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:46,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:46,105 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:46,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 17:43:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:46,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:43:46,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:46,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:46,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561894000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:46,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:46,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 17:43:46,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070128152] [2022-01-18 17:43:46,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:46,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:43:46,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:46,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:43:46,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:43:46,254 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:46,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:46,383 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-01-18 17:43:46,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:43:46,383 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 24 [2022-01-18 17:43:46,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:46,386 INFO L225 Difference]: With dead ends: 685 [2022-01-18 17:43:46,386 INFO L226 Difference]: Without dead ends: 679 [2022-01-18 17:43:46,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:43:46,386 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 167 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:46,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 44 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:43:46,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-18 17:43:46,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-01-18 17:43:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-01-18 17:43:46,396 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-01-18 17:43:46,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:46,396 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-01-18 17:43:46,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:46,396 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-01-18 17:43:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:46,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:46,397 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, 1] [2022-01-18 17:43:46,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:46,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 17:43:46,611 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:46,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1087061590, now seen corresponding path program 10 times [2022-01-18 17:43:46,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:46,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897623754] [2022-01-18 17:43:46,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:46,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:46,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:46,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897623754] [2022-01-18 17:43:46,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897623754] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:46,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406756867] [2022-01-18 17:43:46,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:43:46,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:46,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:46,656 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:46,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 17:43:46,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:43:46,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:46,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:46,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:46,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:46,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406756867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:46,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:46,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 17:43:46,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371558216] [2022-01-18 17:43:46,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:46,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:43:46,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:46,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:43:46,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:43:46,813 INFO L87 Difference]: Start difference. First operand 429 states and 1387 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) [2022-01-18 17:43:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:47,100 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-01-18 17:43:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 17:43:47,101 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 24 [2022-01-18 17:43:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:47,105 INFO L225 Difference]: With dead ends: 1159 [2022-01-18 17:43:47,105 INFO L226 Difference]: Without dead ends: 1111 [2022-01-18 17:43:47,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:43:47,106 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 296 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:47,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 110 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:43:47,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-18 17:43:47,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-01-18 17:43:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-01-18 17:43:47,119 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-01-18 17:43:47,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:47,119 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-01-18 17:43:47,119 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) [2022-01-18 17:43:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-01-18 17:43:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:47,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:47,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:47,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-18 17:43:47,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 17:43:47,335 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:47,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:47,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1793018922, now seen corresponding path program 2 times [2022-01-18 17:43:47,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:47,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662266209] [2022-01-18 17:43:47,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:47,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:47,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:47,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662266209] [2022-01-18 17:43:47,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662266209] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:47,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140995741] [2022-01-18 17:43:47,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:43:47,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:47,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:47,361 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:47,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 17:43:47,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:43:47,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:47,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:43:47,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:47,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:47,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140995741] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:47,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:47,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 17:43:47,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130979250] [2022-01-18 17:43:47,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:47,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:43:47,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:47,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:43:47,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:43:47,520 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:47,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:47,710 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-01-18 17:43:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 17:43:47,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 24 [2022-01-18 17:43:47,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:47,714 INFO L225 Difference]: With dead ends: 1267 [2022-01-18 17:43:47,715 INFO L226 Difference]: Without dead ends: 1267 [2022-01-18 17:43:47,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:43:47,715 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 202 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:47,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 64 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:43:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-01-18 17:43:47,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-01-18 17:43:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-01-18 17:43:47,730 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-01-18 17:43:47,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:47,730 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-01-18 17:43:47,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:47,731 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-01-18 17:43:47,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:47,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:47,732 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, 1] [2022-01-18 17:43:47,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:47,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 17:43:47,948 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:47,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:47,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1155266808, now seen corresponding path program 11 times [2022-01-18 17:43:47,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:47,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379057865] [2022-01-18 17:43:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:47,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:47,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:47,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379057865] [2022-01-18 17:43:47,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379057865] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:47,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650149935] [2022-01-18 17:43:47,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:43:47,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:47,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:47,989 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:47,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 17:43:48,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:43:48,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:48,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:48,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:48,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:48,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650149935] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:48,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:48,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:43:48,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932256883] [2022-01-18 17:43:48,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:48,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:43:48,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:48,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:43:48,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:43:48,136 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:48,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:48,617 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-01-18 17:43:48,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:43:48,617 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:43:48,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:48,625 INFO L225 Difference]: With dead ends: 2268 [2022-01-18 17:43:48,625 INFO L226 Difference]: Without dead ends: 2268 [2022-01-18 17:43:48,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:43:48,626 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 199 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:48,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 212 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:43:48,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-01-18 17:43:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-01-18 17:43:48,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-01-18 17:43:48,649 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-01-18 17:43:48,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:48,650 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-01-18 17:43:48,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:48,650 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-01-18 17:43:48,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:48,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:48,651 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, 1] [2022-01-18 17:43:48,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:48,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 17:43:48,867 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:48,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:48,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1940180902, now seen corresponding path program 12 times [2022-01-18 17:43:48,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:48,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586888146] [2022-01-18 17:43:48,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:48,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:48,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:48,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586888146] [2022-01-18 17:43:48,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586888146] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:48,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535894410] [2022-01-18 17:43:48,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:43:48,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:48,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:48,906 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:48,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 17:43:48,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:43:48,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:48,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:48,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:48,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:49,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535894410] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:49,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:49,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:43:49,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078694019] [2022-01-18 17:43:49,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:49,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:43:49,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:49,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:43:49,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:43:49,056 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:49,625 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-01-18 17:43:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:43:49,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:43:49,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:49,633 INFO L225 Difference]: With dead ends: 2256 [2022-01-18 17:43:49,633 INFO L226 Difference]: Without dead ends: 2256 [2022-01-18 17:43:49,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 17:43:49,634 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 262 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:49,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 162 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:43:49,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-01-18 17:43:49,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-01-18 17:43:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-01-18 17:43:49,664 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-01-18 17:43:49,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:49,665 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-01-18 17:43:49,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:49,665 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-01-18 17:43:49,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:49,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:49,666 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, 1] [2022-01-18 17:43:49,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:49,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:49,881 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:49,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1966730932, now seen corresponding path program 13 times [2022-01-18 17:43:49,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:49,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742372762] [2022-01-18 17:43:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:49,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:49,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:49,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742372762] [2022-01-18 17:43:49,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742372762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:49,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715390358] [2022-01-18 17:43:49,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:43:49,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:49,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:49,914 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:49,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 17:43:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:49,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:49,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:50,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:50,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715390358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:50,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:50,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-01-18 17:43:50,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459738991] [2022-01-18 17:43:50,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:50,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:43:50,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:50,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:43:50,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:43:50,045 INFO L87 Difference]: Start difference. First operand 775 states and 2546 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) [2022-01-18 17:43:50,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:50,284 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-01-18 17:43:50,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 17:43:50,285 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 24 [2022-01-18 17:43:50,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:50,289 INFO L225 Difference]: With dead ends: 1611 [2022-01-18 17:43:50,289 INFO L226 Difference]: Without dead ends: 1611 [2022-01-18 17:43:50,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:43:50,290 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 237 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:50,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 114 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:43:50,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-01-18 17:43:50,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-01-18 17:43:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-01-18 17:43:50,308 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-01-18 17:43:50,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:50,308 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-01-18 17:43:50,308 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) [2022-01-18 17:43:50,308 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-01-18 17:43:50,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:50,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:50,310 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, 1] [2022-01-18 17:43:50,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:50,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 17:43:50,523 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:50,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:50,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1895359760, now seen corresponding path program 14 times [2022-01-18 17:43:50,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:50,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82075072] [2022-01-18 17:43:50,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:50,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:50,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:50,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82075072] [2022-01-18 17:43:50,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82075072] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:50,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47421767] [2022-01-18 17:43:50,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:43:50,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:50,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:50,565 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:50,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 17:43:50,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:43:50,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:50,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:50,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:50,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:50,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47421767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:50,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:50,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:43:50,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724394583] [2022-01-18 17:43:50,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:50,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:43:50,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:50,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:43:50,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:43:50,713 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:51,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:51,147 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-01-18 17:43:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:43:51,147 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:43:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:51,152 INFO L225 Difference]: With dead ends: 2408 [2022-01-18 17:43:51,152 INFO L226 Difference]: Without dead ends: 2404 [2022-01-18 17:43:51,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:43:51,153 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 351 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:51,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 134 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:43:51,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-01-18 17:43:51,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-01-18 17:43:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-01-18 17:43:51,179 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-01-18 17:43:51,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:51,179 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-01-18 17:43:51,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:51,179 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-01-18 17:43:51,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:51,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:51,181 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, 1] [2022-01-18 17:43:51,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:51,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:51,395 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:51,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2029990096, now seen corresponding path program 15 times [2022-01-18 17:43:51,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:51,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122174378] [2022-01-18 17:43:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:51,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:51,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:51,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122174378] [2022-01-18 17:43:51,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122174378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:51,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462933910] [2022-01-18 17:43:51,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:43:51,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:51,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:51,436 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:51,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 17:43:51,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:43:51,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:51,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:51,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:51,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:51,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462933910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:51,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:51,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:43:51,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884752049] [2022-01-18 17:43:51,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:51,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:43:51,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:51,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:43:51,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:43:51,613 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:52,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:52,414 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-01-18 17:43:52,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 17:43:52,414 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:43:52,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:52,422 INFO L225 Difference]: With dead ends: 3509 [2022-01-18 17:43:52,422 INFO L226 Difference]: Without dead ends: 3509 [2022-01-18 17:43:52,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 17:43:52,425 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 553 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:52,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 223 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:43:52,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-01-18 17:43:52,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-01-18 17:43:52,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-01-18 17:43:52,464 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-01-18 17:43:52,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:52,464 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-01-18 17:43:52,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:52,465 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-01-18 17:43:52,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:52,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:52,466 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, 1] [2022-01-18 17:43:52,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:52,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:52,679 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:52,680 INFO L85 PathProgramCache]: Analyzing trace with hash -621938046, now seen corresponding path program 16 times [2022-01-18 17:43:52,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:52,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367856431] [2022-01-18 17:43:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:52,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:52,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:52,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367856431] [2022-01-18 17:43:52,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367856431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:52,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400677362] [2022-01-18 17:43:52,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:43:52,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:52,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:52,726 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:52,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 17:43:52,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:43:52,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:52,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:52,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:52,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:52,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400677362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:52,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:52,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:43:52,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096767212] [2022-01-18 17:43:52,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:52,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:43:52,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:52,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:43:52,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:43:52,895 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:53,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:53,950 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-01-18 17:43:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 17:43:53,951 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:43:53,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:53,958 INFO L225 Difference]: With dead ends: 3211 [2022-01-18 17:43:53,958 INFO L226 Difference]: Without dead ends: 3207 [2022-01-18 17:43:53,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 17:43:53,960 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 421 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:53,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 273 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:43:53,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-01-18 17:43:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-01-18 17:43:53,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-01-18 17:43:53,992 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-01-18 17:43:53,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:53,992 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-01-18 17:43:53,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:53,992 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-01-18 17:43:53,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:53,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:53,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:54,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-18 17:43:54,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:54,211 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:54,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:54,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1534223598, now seen corresponding path program 3 times [2022-01-18 17:43:54,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:54,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244676038] [2022-01-18 17:43:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:54,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:54,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:54,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244676038] [2022-01-18 17:43:54,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244676038] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:54,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312933384] [2022-01-18 17:43:54,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:43:54,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:54,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:54,242 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:54,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 17:43:54,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:43:54,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:54,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:43:54,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:54,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:54,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312933384] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:54,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:54,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-01-18 17:43:54,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288969989] [2022-01-18 17:43:54,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:54,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 17:43:54,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:54,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 17:43:54,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-18 17:43:54,377 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:54,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:54,485 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-01-18 17:43:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 17:43:54,486 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:43:54,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:54,488 INFO L225 Difference]: With dead ends: 1333 [2022-01-18 17:43:54,488 INFO L226 Difference]: Without dead ends: 1333 [2022-01-18 17:43:54,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:43:54,489 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:54,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 60 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:43:54,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-01-18 17:43:54,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-01-18 17:43:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-01-18 17:43:54,505 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-01-18 17:43:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:54,505 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-01-18 17:43:54,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-01-18 17:43:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:54,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:54,507 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, 1] [2022-01-18 17:43:54,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:54,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:54,723 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:54,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:54,723 INFO L85 PathProgramCache]: Analyzing trace with hash -604023854, now seen corresponding path program 17 times [2022-01-18 17:43:54,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:54,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124627475] [2022-01-18 17:43:54,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:54,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:54,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:54,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124627475] [2022-01-18 17:43:54,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124627475] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:54,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735151272] [2022-01-18 17:43:54,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:43:54,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:54,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:54,752 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:54,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 17:43:54,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:43:54,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:54,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:54,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:54,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:54,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735151272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:54,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:54,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 17:43:54,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375997316] [2022-01-18 17:43:54,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:54,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:43:54,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:54,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:43:54,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:43:54,887 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) 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) [2022-01-18 17:43:55,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:55,204 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-01-18 17:43:55,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:43:55,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) 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 24 [2022-01-18 17:43:55,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:55,209 INFO L225 Difference]: With dead ends: 2129 [2022-01-18 17:43:55,209 INFO L226 Difference]: Without dead ends: 2129 [2022-01-18 17:43:55,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:43:55,210 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 179 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:55,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 132 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:43:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-01-18 17:43:55,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-01-18 17:43:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:55,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-01-18 17:43:55,233 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-01-18 17:43:55,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:55,233 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-01-18 17:43:55,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) 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) [2022-01-18 17:43:55,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-01-18 17:43:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:55,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:55,235 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, 1] [2022-01-18 17:43:55,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:55,450 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,SelfDestructingSolverStorable22 [2022-01-18 17:43:55,451 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:55,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:55,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1298655598, now seen corresponding path program 18 times [2022-01-18 17:43:55,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:55,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538280165] [2022-01-18 17:43:55,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:55,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:55,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:55,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538280165] [2022-01-18 17:43:55,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538280165] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:55,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862535318] [2022-01-18 17:43:55,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:43:55,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:55,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:55,481 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:55,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 17:43:55,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:43:55,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:55,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:55,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:55,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:55,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862535318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:55,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:55,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 17:43:55,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813684315] [2022-01-18 17:43:55,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:55,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:43:55,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:55,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:43:55,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:43:55,600 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:55,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:55,936 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-01-18 17:43:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:43:55,937 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:43:55,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:55,940 INFO L225 Difference]: With dead ends: 2262 [2022-01-18 17:43:55,940 INFO L226 Difference]: Without dead ends: 2262 [2022-01-18 17:43:55,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:43:55,941 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 159 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:55,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 123 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:43:55,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-01-18 17:43:55,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-01-18 17:43:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:55,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-01-18 17:43:55,966 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-01-18 17:43:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:55,966 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-01-18 17:43:55,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-01-18 17:43:55,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:55,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:55,969 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, 1] [2022-01-18 17:43:55,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:56,179 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,SelfDestructingSolverStorable23 [2022-01-18 17:43:56,179 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:56,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:56,180 INFO L85 PathProgramCache]: Analyzing trace with hash 215632942, now seen corresponding path program 19 times [2022-01-18 17:43:56,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:56,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77593495] [2022-01-18 17:43:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:56,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:56,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:56,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77593495] [2022-01-18 17:43:56,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77593495] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:56,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212935569] [2022-01-18 17:43:56,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:43:56,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:56,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:56,243 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:56,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 17:43:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:56,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:56,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:56,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:56,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212935569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:56,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:56,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-01-18 17:43:56,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273845160] [2022-01-18 17:43:56,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:56,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:43:56,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:56,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:43:56,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:43:56,406 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-01-18 17:43:56,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:56,623 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-01-18 17:43:56,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 17:43:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 24 [2022-01-18 17:43:56,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:56,626 INFO L225 Difference]: With dead ends: 1474 [2022-01-18 17:43:56,626 INFO L226 Difference]: Without dead ends: 1464 [2022-01-18 17:43:56,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:43:56,626 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 160 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:56,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 117 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:43:56,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-01-18 17:43:56,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-01-18 17:43:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-01-18 17:43:56,645 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-01-18 17:43:56,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:56,645 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-01-18 17:43:56,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-01-18 17:43:56,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-01-18 17:43:56,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:56,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:56,647 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, 1] [2022-01-18 17:43:56,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:56,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:56,862 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:56,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:56,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1253834456, now seen corresponding path program 20 times [2022-01-18 17:43:56,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:56,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112144279] [2022-01-18 17:43:56,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:56,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:56,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:56,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112144279] [2022-01-18 17:43:56,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112144279] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:56,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077679648] [2022-01-18 17:43:56,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:43:56,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:56,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:56,891 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:56,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 17:43:56,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:43:56,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:56,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:56,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:56,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:57,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077679648] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:57,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:57,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 17:43:57,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390832414] [2022-01-18 17:43:57,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:57,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:43:57,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:57,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:43:57,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:43:57,006 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:57,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:57,253 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-01-18 17:43:57,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 17:43:57,254 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:43:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:57,257 INFO L225 Difference]: With dead ends: 2318 [2022-01-18 17:43:57,257 INFO L226 Difference]: Without dead ends: 2314 [2022-01-18 17:43:57,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:43:57,258 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 185 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:57,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 118 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:43:57,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-01-18 17:43:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-01-18 17:43:57,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-01-18 17:43:57,280 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-01-18 17:43:57,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:57,280 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-01-18 17:43:57,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:57,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-01-18 17:43:57,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:57,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:57,282 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, 1] [2022-01-18 17:43:57,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:57,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:57,498 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:57,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:57,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1851171114, now seen corresponding path program 21 times [2022-01-18 17:43:57,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:57,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886369964] [2022-01-18 17:43:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:57,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:57,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886369964] [2022-01-18 17:43:57,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886369964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332972840] [2022-01-18 17:43:57,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:43:57,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:57,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:57,533 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:57,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 17:43:57,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:43:57,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:57,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:57,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:57,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:57,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332972840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:57,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:57,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 17:43:57,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997380585] [2022-01-18 17:43:57,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:57,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:43:57,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:57,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:43:57,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:43:57,652 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) 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) [2022-01-18 17:43:57,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:57,922 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-01-18 17:43:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 17:43:57,922 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) 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 24 [2022-01-18 17:43:57,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:57,926 INFO L225 Difference]: With dead ends: 2302 [2022-01-18 17:43:57,926 INFO L226 Difference]: Without dead ends: 2290 [2022-01-18 17:43:57,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:43:57,927 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 224 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:57,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 129 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:43:57,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-01-18 17:43:57,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-01-18 17:43:57,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:57,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-01-18 17:43:57,948 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-01-18 17:43:57,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:57,948 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-01-18 17:43:57,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) 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) [2022-01-18 17:43:57,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-01-18 17:43:57,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:57,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:57,950 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, 1] [2022-01-18 17:43:57,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 17:43:58,157 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,SelfDestructingSolverStorable26 [2022-01-18 17:43:58,157 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:58,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:58,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1324750830, now seen corresponding path program 22 times [2022-01-18 17:43:58,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:58,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485296063] [2022-01-18 17:43:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:58,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:58,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:58,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485296063] [2022-01-18 17:43:58,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485296063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:58,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045775568] [2022-01-18 17:43:58,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:43:58,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:58,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:58,192 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:58,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 17:43:58,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:43:58,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:58,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:58,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:58,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:58,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045775568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:58,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:58,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:43:58,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973661431] [2022-01-18 17:43:58,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:58,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:43:58,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:58,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:43:58,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:43:58,384 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-01-18 17:43:59,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:59,199 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-01-18 17:43:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 17:43:59,199 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 24 [2022-01-18 17:43:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:59,208 INFO L225 Difference]: With dead ends: 4760 [2022-01-18 17:43:59,208 INFO L226 Difference]: Without dead ends: 4760 [2022-01-18 17:43:59,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:43:59,210 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 502 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:59,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 203 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:43:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-01-18 17:43:59,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-01-18 17:43:59,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-01-18 17:43:59,254 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-01-18 17:43:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:59,254 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-01-18 17:43:59,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-01-18 17:43:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-01-18 17:43:59,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:43:59,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:59,257 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, 1] [2022-01-18 17:43:59,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-18 17:43:59,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 17:43:59,472 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:59,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:59,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1891702910, now seen corresponding path program 23 times [2022-01-18 17:43:59,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:59,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410434599] [2022-01-18 17:43:59,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:59,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:59,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:59,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410434599] [2022-01-18 17:43:59,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410434599] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:59,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957055896] [2022-01-18 17:43:59,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:43:59,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:59,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:59,510 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:59,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 17:43:59,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:43:59,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:59,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:59,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:59,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:43:59,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957055896] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:59,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:59,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:43:59,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894382356] [2022-01-18 17:43:59,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:59,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:43:59,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:59,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:43:59,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:43:59,708 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-01-18 17:44:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:00,362 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-01-18 17:44:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:44:00,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 24 [2022-01-18 17:44:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:00,369 INFO L225 Difference]: With dead ends: 4260 [2022-01-18 17:44:00,369 INFO L226 Difference]: Without dead ends: 4260 [2022-01-18 17:44:00,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 17:44:00,370 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 405 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:00,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 186 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:44:00,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-01-18 17:44:00,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-01-18 17:44:00,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-01-18 17:44:00,407 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-01-18 17:44:00,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:00,407 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-01-18 17:44:00,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-01-18 17:44:00,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-01-18 17:44:00,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:44:00,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:00,409 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, 1] [2022-01-18 17:44:00,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-18 17:44:00,609 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,SelfDestructingSolverStorable28 [2022-01-18 17:44:00,610 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:00,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:00,610 INFO L85 PathProgramCache]: Analyzing trace with hash 719357052, now seen corresponding path program 24 times [2022-01-18 17:44:00,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:00,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709737068] [2022-01-18 17:44:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:00,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:00,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:00,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709737068] [2022-01-18 17:44:00,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709737068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:00,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269107884] [2022-01-18 17:44:00,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:44:00,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:00,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:00,646 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:00,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:44:00,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:00,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:44:00,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:00,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 17:44:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:00,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:00,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269107884] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:00,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:00,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 17:44:00,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548703648] [2022-01-18 17:44:00,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:00,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:44:00,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:00,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:44:00,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:44:00,799 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:01,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:01,396 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-01-18 17:44:01,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:44:01,397 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 24 [2022-01-18 17:44:01,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:01,404 INFO L225 Difference]: With dead ends: 4602 [2022-01-18 17:44:01,404 INFO L226 Difference]: Without dead ends: 4602 [2022-01-18 17:44:01,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 17:44:01,405 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 287 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:01,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 204 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:44:01,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-01-18 17:44:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-01-18 17:44:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-01-18 17:44:01,448 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-01-18 17:44:01,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:01,448 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-01-18 17:44:01,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:01,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-01-18 17:44:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:44:01,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:01,450 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, 1] [2022-01-18 17:44:01,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:01,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:01,666 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:01,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:01,666 INFO L85 PathProgramCache]: Analyzing trace with hash 800733140, now seen corresponding path program 25 times [2022-01-18 17:44:01,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:01,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650450183] [2022-01-18 17:44:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:01,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:01,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:01,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650450183] [2022-01-18 17:44:01,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650450183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:01,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771560951] [2022-01-18 17:44:01,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:44:01,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:01,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:01,697 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:01,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 17:44:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:01,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:44:01,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:01,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:01,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771560951] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:01,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:01,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 17:44:01,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838866182] [2022-01-18 17:44:01,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:01,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:44:01,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:01,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:44:01,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:44:01,840 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:02,332 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-01-18 17:44:02,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:44:02,332 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 24 [2022-01-18 17:44:02,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:02,339 INFO L225 Difference]: With dead ends: 4348 [2022-01-18 17:44:02,339 INFO L226 Difference]: Without dead ends: 4344 [2022-01-18 17:44:02,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:44:02,340 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 374 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:02,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 174 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:44:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-01-18 17:44:02,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-01-18 17:44:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 17:44:02,379 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 17:44:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:02,379 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 17:44:02,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 17:44:02,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:44:02,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:02,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:02,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:02,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:02,597 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:02,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:02,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1731390356, now seen corresponding path program 26 times [2022-01-18 17:44:02,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:02,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747547377] [2022-01-18 17:44:02,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:02,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:02,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:02,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747547377] [2022-01-18 17:44:02,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747547377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:02,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459192689] [2022-01-18 17:44:02,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:44:02,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:02,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:02,632 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:02,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 17:44:02,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:44:02,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:02,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:44:02,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:02,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:02,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459192689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:02,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:02,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:44:02,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724633989] [2022-01-18 17:44:02,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:02,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:44:02,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:02,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:44:02,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:44:02,802 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:03,349 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-01-18 17:44:03,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 17:44:03,349 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:44:03,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:03,356 INFO L225 Difference]: With dead ends: 4035 [2022-01-18 17:44:03,356 INFO L226 Difference]: Without dead ends: 4035 [2022-01-18 17:44:03,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 17:44:03,357 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 443 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:03,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 229 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:44:03,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-01-18 17:44:03,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-01-18 17:44:03,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:03,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-01-18 17:44:03,392 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-01-18 17:44:03,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:03,392 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-01-18 17:44:03,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:03,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-01-18 17:44:03,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:44:03,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:03,394 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, 1] [2022-01-18 17:44:03,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 17:44:03,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:03,595 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:03,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:03,595 INFO L85 PathProgramCache]: Analyzing trace with hash -920537786, now seen corresponding path program 27 times [2022-01-18 17:44:03,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:03,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253011888] [2022-01-18 17:44:03,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:03,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:03,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:03,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253011888] [2022-01-18 17:44:03,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253011888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:03,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273753292] [2022-01-18 17:44:03,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:44:03,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:03,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:03,632 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:03,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 17:44:03,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:44:03,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:03,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:44:03,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:03,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:03,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273753292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:03,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:03,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:44:03,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947657017] [2022-01-18 17:44:03,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:03,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:44:03,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:03,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:44:03,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:44:03,791 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:04,472 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-01-18 17:44:04,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:44:04,472 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:44:04,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:04,479 INFO L225 Difference]: With dead ends: 3794 [2022-01-18 17:44:04,479 INFO L226 Difference]: Without dead ends: 3790 [2022-01-18 17:44:04,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 17:44:04,480 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 403 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:04,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 178 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:44:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-01-18 17:44:04,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-01-18 17:44:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 17:44:04,512 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 17:44:04,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:04,512 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 17:44:04,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:04,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 17:44:04,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:44:04,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:04,515 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, 1] [2022-01-18 17:44:04,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 17:44:04,715 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,SelfDestructingSolverStorable32 [2022-01-18 17:44:04,715 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:04,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:04,715 INFO L85 PathProgramCache]: Analyzing trace with hash 82890198, now seen corresponding path program 28 times [2022-01-18 17:44:04,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:04,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540942928] [2022-01-18 17:44:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:04,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:04,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:04,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540942928] [2022-01-18 17:44:04,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540942928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:04,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567058467] [2022-01-18 17:44:04,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:44:04,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:04,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:04,752 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:04,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 17:44:04,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:44:04,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:04,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:44:04,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:04,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:04,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567058467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:04,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:04,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:44:04,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323759310] [2022-01-18 17:44:04,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:04,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:44:04,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:04,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:44:04,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:44:04,886 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) 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) [2022-01-18 17:44:05,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:05,464 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-01-18 17:44:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:44:05,464 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) 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 24 [2022-01-18 17:44:05,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:05,471 INFO L225 Difference]: With dead ends: 3978 [2022-01-18 17:44:05,471 INFO L226 Difference]: Without dead ends: 3978 [2022-01-18 17:44:05,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 17:44:05,472 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 277 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:05,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 178 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:44:05,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-01-18 17:44:05,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-01-18 17:44:05,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:05,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-01-18 17:44:05,508 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-01-18 17:44:05,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:05,508 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-01-18 17:44:05,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) 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) [2022-01-18 17:44:05,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-01-18 17:44:05,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:44:05,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:05,511 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, 1] [2022-01-18 17:44:05,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:05,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:05,721 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:05,721 INFO L85 PathProgramCache]: Analyzing trace with hash 164266286, now seen corresponding path program 29 times [2022-01-18 17:44:05,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:05,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967337382] [2022-01-18 17:44:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:05,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:05,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:05,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967337382] [2022-01-18 17:44:05,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967337382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:05,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785762434] [2022-01-18 17:44:05,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:44:05,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:05,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:05,757 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:05,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 17:44:05,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:44:05,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:05,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:44:05,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:05,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:05,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785762434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:05,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:05,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:44:05,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995286295] [2022-01-18 17:44:05,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:05,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:44:05,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:05,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:44:05,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:44:05,912 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) 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) [2022-01-18 17:44:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:06,367 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-01-18 17:44:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:44:06,367 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) 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 24 [2022-01-18 17:44:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:06,374 INFO L225 Difference]: With dead ends: 3706 [2022-01-18 17:44:06,374 INFO L226 Difference]: Without dead ends: 3702 [2022-01-18 17:44:06,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:44:06,374 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 284 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:06,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 124 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:44:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-01-18 17:44:06,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-01-18 17:44:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-01-18 17:44:06,408 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-01-18 17:44:06,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:06,408 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-01-18 17:44:06,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) 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) [2022-01-18 17:44:06,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-01-18 17:44:06,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:44:06,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:06,411 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, 1] [2022-01-18 17:44:06,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 17:44:06,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:06,626 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:06,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:06,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1350825686, now seen corresponding path program 30 times [2022-01-18 17:44:06,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:06,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818323494] [2022-01-18 17:44:06,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:06,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:06,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:06,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818323494] [2022-01-18 17:44:06,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818323494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:06,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660385493] [2022-01-18 17:44:06,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:44:06,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:06,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:06,661 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:06,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 17:44:06,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:44:06,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:06,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:44:06,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:06,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:06,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660385493] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:06,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:06,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:44:06,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179595442] [2022-01-18 17:44:06,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:06,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:44:06,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:06,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:44:06,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:44:06,804 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) 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) [2022-01-18 17:44:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:07,303 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-01-18 17:44:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:44:07,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) 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 24 [2022-01-18 17:44:07,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:07,310 INFO L225 Difference]: With dead ends: 4114 [2022-01-18 17:44:07,310 INFO L226 Difference]: Without dead ends: 4102 [2022-01-18 17:44:07,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:44:07,310 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 274 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:07,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 193 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:44:07,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-01-18 17:44:07,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-01-18 17:44:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-01-18 17:44:07,346 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-01-18 17:44:07,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:07,346 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-01-18 17:44:07,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) 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) [2022-01-18 17:44:07,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-01-18 17:44:07,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:44:07,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:07,349 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, 1] [2022-01-18 17:44:07,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 17:44:07,549 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,SelfDestructingSolverStorable35 [2022-01-18 17:44:07,550 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:07,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:07,550 INFO L85 PathProgramCache]: Analyzing trace with hash 246301030, now seen corresponding path program 31 times [2022-01-18 17:44:07,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:07,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008600970] [2022-01-18 17:44:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:07,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:07,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:07,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008600970] [2022-01-18 17:44:07,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008600970] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:07,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199310575] [2022-01-18 17:44:07,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:44:07,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:07,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:07,598 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:07,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 17:44:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:07,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:44:07,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:07,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:07,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199310575] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:07,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:07,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:44:07,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733098902] [2022-01-18 17:44:07,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:07,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:44:07,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:07,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:44:07,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:44:07,785 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:08,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:08,365 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-01-18 17:44:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:44:08,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:44:08,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:08,372 INFO L225 Difference]: With dead ends: 3694 [2022-01-18 17:44:08,372 INFO L226 Difference]: Without dead ends: 3694 [2022-01-18 17:44:08,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 17:44:08,373 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 361 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:08,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 292 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:44:08,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-01-18 17:44:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-01-18 17:44:08,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-01-18 17:44:08,409 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-01-18 17:44:08,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:08,409 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-01-18 17:44:08,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-01-18 17:44:08,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:44:08,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:08,412 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, 1] [2022-01-18 17:44:08,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-18 17:44:08,627 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,SelfDestructingSolverStorable36 [2022-01-18 17:44:08,627 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:08,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1889340184, now seen corresponding path program 32 times [2022-01-18 17:44:08,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:08,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054587545] [2022-01-18 17:44:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:08,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:08,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:08,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054587545] [2022-01-18 17:44:08,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054587545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:08,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553331337] [2022-01-18 17:44:08,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:44:08,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:08,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:08,667 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:08,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 17:44:08,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:44:08,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:08,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:44:08,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:08,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:08,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553331337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:08,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:08,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:44:08,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688682094] [2022-01-18 17:44:08,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:08,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:44:08,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:08,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:44:08,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:44:08,840 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:09,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:09,608 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-01-18 17:44:09,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:44:09,608 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:44:09,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:09,614 INFO L225 Difference]: With dead ends: 3420 [2022-01-18 17:44:09,614 INFO L226 Difference]: Without dead ends: 3416 [2022-01-18 17:44:09,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:44:09,615 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 284 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:09,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 234 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:44:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-01-18 17:44:09,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-01-18 17:44:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-01-18 17:44:09,664 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-01-18 17:44:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:09,664 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-01-18 17:44:09,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-01-18 17:44:09,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:44:09,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:09,667 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, 1] [2022-01-18 17:44:09,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 17:44:09,867 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,SelfDestructingSolverStorable37 [2022-01-18 17:44:09,868 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:09,868 INFO L85 PathProgramCache]: Analyzing trace with hash 621883006, now seen corresponding path program 33 times [2022-01-18 17:44:09,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:09,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851840250] [2022-01-18 17:44:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:09,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:09,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:09,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851840250] [2022-01-18 17:44:09,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851840250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:09,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751350386] [2022-01-18 17:44:09,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:44:09,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:09,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:09,910 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:09,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 17:44:09,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:44:09,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:09,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:44:09,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:09,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:10,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751350386] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:10,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:10,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 17:44:10,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903917972] [2022-01-18 17:44:10,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:10,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:44:10,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:10,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:44:10,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:44:10,054 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:10,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:10,594 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-01-18 17:44:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 17:44:10,594 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 24 [2022-01-18 17:44:10,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:10,599 INFO L225 Difference]: With dead ends: 3256 [2022-01-18 17:44:10,599 INFO L226 Difference]: Without dead ends: 3244 [2022-01-18 17:44:10,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 17:44:10,600 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 249 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:10,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 188 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:44:10,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-01-18 17:44:10,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-01-18 17:44:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:10,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-01-18 17:44:10,632 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-01-18 17:44:10,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:10,632 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-01-18 17:44:10,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:10,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-01-18 17:44:10,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:10,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:10,634 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, 1, 1, 1] [2022-01-18 17:44:10,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:10,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 17:44:10,835 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:10,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:10,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1878950772, now seen corresponding path program 4 times [2022-01-18 17:44:10,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:10,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123115320] [2022-01-18 17:44:10,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:10,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:11,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:11,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123115320] [2022-01-18 17:44:11,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123115320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:11,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005632120] [2022-01-18 17:44:11,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:44:11,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:11,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:11,017 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:11,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 17:44:11,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:44:11,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:11,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:44:11,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:11,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:11,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:11,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-01-18 17:44:11,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:11,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:11,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:11,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:11,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-18 17:44:11,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:11,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:11,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:11,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-18 17:44:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:11,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005632120] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:11,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:11,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:44:11,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732813092] [2022-01-18 17:44:11,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:11,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:44:11,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:11,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:44:11,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:44:11,852 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) 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) [2022-01-18 17:44:13,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:13,784 INFO L93 Difference]: Finished difference Result 3835 states and 12416 transitions. [2022-01-18 17:44:13,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 17:44:13,784 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) 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 26 [2022-01-18 17:44:13,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:13,791 INFO L225 Difference]: With dead ends: 3835 [2022-01-18 17:44:13,791 INFO L226 Difference]: Without dead ends: 3805 [2022-01-18 17:44:13,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:44:13,792 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 501 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:13,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 238 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:44:13,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2022-01-18 17:44:13,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 1792. [2022-01-18 17:44:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 3.5907314349525405) internal successors, (6431), 1791 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6431 transitions. [2022-01-18 17:44:13,825 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6431 transitions. Word has length 26 [2022-01-18 17:44:13,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:13,825 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 6431 transitions. [2022-01-18 17:44:13,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) 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) [2022-01-18 17:44:13,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6431 transitions. [2022-01-18 17:44:13,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:13,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:13,828 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, 1, 1, 1] [2022-01-18 17:44:13,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:14,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 17:44:14,032 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:14,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:14,032 INFO L85 PathProgramCache]: Analyzing trace with hash 387618508, now seen corresponding path program 5 times [2022-01-18 17:44:14,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:14,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143098948] [2022-01-18 17:44:14,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:14,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:14,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:14,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143098948] [2022-01-18 17:44:14,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143098948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:14,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448157173] [2022-01-18 17:44:14,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:44:14,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:14,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:14,214 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:14,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 17:44:14,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:44:14,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:14,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:44:14,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:14,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:14,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:14,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 17:44:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:14,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:14,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:14,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 69 [2022-01-18 17:44:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:15,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448157173] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:15,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:15,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 17:44:15,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167515206] [2022-01-18 17:44:15,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:15,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:44:15,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:15,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:44:15,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:44:15,256 INFO L87 Difference]: Start difference. First operand 1792 states and 6431 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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) [2022-01-18 17:44:17,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:17,762 INFO L93 Difference]: Finished difference Result 4707 states and 15469 transitions. [2022-01-18 17:44:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 17:44:17,762 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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 26 [2022-01-18 17:44:17,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:17,770 INFO L225 Difference]: With dead ends: 4707 [2022-01-18 17:44:17,770 INFO L226 Difference]: Without dead ends: 4690 [2022-01-18 17:44:17,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=969, Invalid=5837, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 17:44:17,773 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 416 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 578 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:17,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 434 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 999 Invalid, 0 Unknown, 578 Unchecked, 0.5s Time] [2022-01-18 17:44:17,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4690 states. [2022-01-18 17:44:17,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4690 to 1853. [2022-01-18 17:44:17,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 3.603131749460043) internal successors, (6673), 1852 states have internal predecessors, (6673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 6673 transitions. [2022-01-18 17:44:17,816 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 6673 transitions. Word has length 26 [2022-01-18 17:44:17,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:17,817 INFO L470 AbstractCegarLoop]: Abstraction has 1853 states and 6673 transitions. [2022-01-18 17:44:17,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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) [2022-01-18 17:44:17,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 6673 transitions. [2022-01-18 17:44:17,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:17,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:17,820 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, 1] [2022-01-18 17:44:17,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:18,020 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,SelfDestructingSolverStorable40 [2022-01-18 17:44:18,020 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:18,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:18,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1979047816, now seen corresponding path program 34 times [2022-01-18 17:44:18,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:18,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797641013] [2022-01-18 17:44:18,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:18,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:18,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:18,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797641013] [2022-01-18 17:44:18,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797641013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:18,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679844270] [2022-01-18 17:44:18,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:44:18,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:18,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:18,266 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:18,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 17:44:18,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:44:18,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:18,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:44:18,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:18,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:18,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:18,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:18,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-01-18 17:44:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:18,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:18,711 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:44:18,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-01-18 17:44:18,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:18,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:18,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:18,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 17:44:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:18,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679844270] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:18,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:18,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 17:44:18,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270302562] [2022-01-18 17:44:18,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:18,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:44:18,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:18,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:44:18,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:44:18,867 INFO L87 Difference]: Start difference. First operand 1853 states and 6673 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:21,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:21,475 INFO L93 Difference]: Finished difference Result 3583 states and 12115 transitions. [2022-01-18 17:44:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:44:21,475 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:44:21,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:21,481 INFO L225 Difference]: With dead ends: 3583 [2022-01-18 17:44:21,481 INFO L226 Difference]: Without dead ends: 3568 [2022-01-18 17:44:21,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=894, Invalid=4656, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 17:44:21,482 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 325 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:21,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 345 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1875 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:44:21,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2022-01-18 17:44:21,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 1900. [2022-01-18 17:44:21,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 3.592943654555029) internal successors, (6823), 1899 states have internal predecessors, (6823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 6823 transitions. [2022-01-18 17:44:21,518 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 6823 transitions. Word has length 26 [2022-01-18 17:44:21,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:21,518 INFO L470 AbstractCegarLoop]: Abstraction has 1900 states and 6823 transitions. [2022-01-18 17:44:21,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:21,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 6823 transitions. [2022-01-18 17:44:21,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:21,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:21,522 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, 1, 1, 1] [2022-01-18 17:44:21,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:21,735 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,SelfDestructingSolverStorable41 [2022-01-18 17:44:21,735 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:21,736 INFO L85 PathProgramCache]: Analyzing trace with hash -498179772, now seen corresponding path program 6 times [2022-01-18 17:44:21,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:21,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571698993] [2022-01-18 17:44:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:21,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:21,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:21,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571698993] [2022-01-18 17:44:21,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571698993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:21,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290842964] [2022-01-18 17:44:21,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:44:21,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:21,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:21,920 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:21,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 17:44:21,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:44:21,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:21,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:44:21,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:22,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:22,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-01-18 17:44:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:22,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:22,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:22,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:22,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:22,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-18 17:44:22,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:22,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-01-18 17:44:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:22,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290842964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:22,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:22,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 17:44:22,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228332843] [2022-01-18 17:44:22,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:22,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:44:22,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:22,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:44:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:44:22,792 INFO L87 Difference]: Start difference. First operand 1900 states and 6823 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:28,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:28,890 INFO L93 Difference]: Finished difference Result 4754 states and 15532 transitions. [2022-01-18 17:44:28,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 17:44:28,891 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:44:28,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:28,898 INFO L225 Difference]: With dead ends: 4754 [2022-01-18 17:44:28,899 INFO L226 Difference]: Without dead ends: 4709 [2022-01-18 17:44:28,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3963 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2010, Invalid=9120, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 17:44:28,900 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 675 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:28,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 606 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1659 Invalid, 0 Unknown, 506 Unchecked, 0.9s Time] [2022-01-18 17:44:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4709 states. [2022-01-18 17:44:28,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4709 to 1959. [2022-01-18 17:44:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1958 states have (on average 3.594994892747702) internal successors, (7039), 1958 states have internal predecessors, (7039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:28,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 7039 transitions. [2022-01-18 17:44:28,942 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 7039 transitions. Word has length 26 [2022-01-18 17:44:28,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:28,942 INFO L470 AbstractCegarLoop]: Abstraction has 1959 states and 7039 transitions. [2022-01-18 17:44:28,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 7039 transitions. [2022-01-18 17:44:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:28,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:28,946 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, 1, 1, 1] [2022-01-18 17:44:28,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 17:44:29,146 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,SelfDestructingSolverStorable42 [2022-01-18 17:44:29,146 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:29,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:29,146 INFO L85 PathProgramCache]: Analyzing trace with hash -943920224, now seen corresponding path program 7 times [2022-01-18 17:44:29,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:29,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863744003] [2022-01-18 17:44:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:29,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:29,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:29,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863744003] [2022-01-18 17:44:29,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863744003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:29,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308403949] [2022-01-18 17:44:29,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:44:29,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:29,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:29,310 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:29,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 17:44:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:29,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:44:29,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:29,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:29,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:29,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-01-18 17:44:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:29,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:29,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:29,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:29,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-18 17:44:29,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:29,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:29,926 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:29,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:44:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:30,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308403949] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:30,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:30,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:44:30,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125080975] [2022-01-18 17:44:30,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:30,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:44:30,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:30,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:44:30,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:44:30,158 INFO L87 Difference]: Start difference. First operand 1959 states and 7039 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:32,516 INFO L93 Difference]: Finished difference Result 4690 states and 14796 transitions. [2022-01-18 17:44:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:44:32,516 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:44:32,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:32,524 INFO L225 Difference]: With dead ends: 4690 [2022-01-18 17:44:32,524 INFO L226 Difference]: Without dead ends: 4675 [2022-01-18 17:44:32,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 17:44:32,525 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 728 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:32,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 383 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1361 Invalid, 0 Unknown, 67 Unchecked, 0.7s Time] [2022-01-18 17:44:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2022-01-18 17:44:32,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 2024. [2022-01-18 17:44:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 3.583786455758774) internal successors, (7250), 2023 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 7250 transitions. [2022-01-18 17:44:32,572 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 7250 transitions. Word has length 26 [2022-01-18 17:44:32,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:32,572 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 7250 transitions. [2022-01-18 17:44:32,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:32,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 7250 transitions. [2022-01-18 17:44:32,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:32,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:32,576 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, 1, 1, 1] [2022-01-18 17:44:32,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:32,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:32,791 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:32,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1290187270, now seen corresponding path program 8 times [2022-01-18 17:44:32,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:32,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009258406] [2022-01-18 17:44:32,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:32,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:32,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:32,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009258406] [2022-01-18 17:44:32,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009258406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:32,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6834270] [2022-01-18 17:44:32,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:44:32,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:32,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:33,000 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:33,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 17:44:33,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:44:33,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:33,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:44:33,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:33,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:33,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:33,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:33,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2022-01-18 17:44:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:33,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:33,471 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:44:33,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-18 17:44:33,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:33,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:33,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:33,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:44:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:33,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6834270] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:33,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:33,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:44:33,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666075492] [2022-01-18 17:44:33,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:33,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:44:33,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:33,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:44:33,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:44:33,798 INFO L87 Difference]: Start difference. First operand 2024 states and 7250 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:37,611 INFO L93 Difference]: Finished difference Result 4691 states and 15051 transitions. [2022-01-18 17:44:37,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 17:44:37,611 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:44:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:37,619 INFO L225 Difference]: With dead ends: 4691 [2022-01-18 17:44:37,619 INFO L226 Difference]: Without dead ends: 4661 [2022-01-18 17:44:37,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2621 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1102, Invalid=6908, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 17:44:37,620 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 462 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 2568 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:37,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 613 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2568 Invalid, 0 Unknown, 358 Unchecked, 1.1s Time] [2022-01-18 17:44:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2022-01-18 17:44:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 2033. [2022-01-18 17:44:37,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.5866141732283463) internal successors, (7288), 2032 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7288 transitions. [2022-01-18 17:44:37,663 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7288 transitions. Word has length 26 [2022-01-18 17:44:37,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:37,663 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 7288 transitions. [2022-01-18 17:44:37,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7288 transitions. [2022-01-18 17:44:37,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:37,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:37,667 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, 1] [2022-01-18 17:44:37,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 17:44:37,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:37,867 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:37,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:37,868 INFO L85 PathProgramCache]: Analyzing trace with hash 39509260, now seen corresponding path program 35 times [2022-01-18 17:44:37,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:37,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752764766] [2022-01-18 17:44:37,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:37,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:38,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:38,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752764766] [2022-01-18 17:44:38,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752764766] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:38,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173014614] [2022-01-18 17:44:38,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:44:38,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:38,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:38,095 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:38,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 17:44:38,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:44:38,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:38,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:44:38,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:38,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:38,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:38,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:38,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:38,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-01-18 17:44:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:38,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:38,510 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:44:38,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-01-18 17:44:38,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:38,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:38,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:38,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 17:44:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:38,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173014614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:38,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:38,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-18 17:44:38,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694878969] [2022-01-18 17:44:38,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:38,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:44:38,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:38,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:44:38,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:44:38,642 INFO L87 Difference]: Start difference. First operand 2033 states and 7288 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:41,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:41,997 INFO L93 Difference]: Finished difference Result 4642 states and 15313 transitions. [2022-01-18 17:44:41,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 17:44:41,998 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:44:41,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:42,006 INFO L225 Difference]: With dead ends: 4642 [2022-01-18 17:44:42,006 INFO L226 Difference]: Without dead ends: 4595 [2022-01-18 17:44:42,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3113 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1504, Invalid=7052, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 17:44:42,007 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 463 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 1857 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:42,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 427 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1857 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:44:42,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4595 states. [2022-01-18 17:44:42,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4595 to 2070. [2022-01-18 17:44:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 3.583856935717738) internal successors, (7415), 2069 states have internal predecessors, (7415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:42,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 7415 transitions. [2022-01-18 17:44:42,051 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 7415 transitions. Word has length 26 [2022-01-18 17:44:42,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:42,051 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 7415 transitions. [2022-01-18 17:44:42,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:42,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 7415 transitions. [2022-01-18 17:44:42,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:42,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:42,055 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, 1] [2022-01-18 17:44:42,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:42,255 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,SelfDestructingSolverStorable45 [2022-01-18 17:44:42,255 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:42,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:42,255 INFO L85 PathProgramCache]: Analyzing trace with hash -936809584, now seen corresponding path program 36 times [2022-01-18 17:44:42,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:42,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568676441] [2022-01-18 17:44:42,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:42,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:42,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:42,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568676441] [2022-01-18 17:44:42,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568676441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:42,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035221144] [2022-01-18 17:44:42,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:44:42,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:42,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:42,485 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:42,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 17:44:42,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:44:42,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:42,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:44:42,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:42,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:42,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:42,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:42,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 17:44:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:42,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:42,951 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:44:42,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-01-18 17:44:43,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:43,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:43,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:43,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 17:44:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:43,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035221144] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:43,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:43,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2022-01-18 17:44:43,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017639630] [2022-01-18 17:44:43,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:43,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:44:43,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:43,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:44:43,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:44:43,074 INFO L87 Difference]: Start difference. First operand 2070 states and 7415 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:54,010 INFO L93 Difference]: Finished difference Result 5943 states and 19306 transitions. [2022-01-18 17:44:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-01-18 17:44:54,010 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:44:54,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:54,021 INFO L225 Difference]: With dead ends: 5943 [2022-01-18 17:44:54,021 INFO L226 Difference]: Without dead ends: 5895 [2022-01-18 17:44:54,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19066 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=4752, Invalid=40830, Unknown=0, NotChecked=0, Total=45582 [2022-01-18 17:44:54,023 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 570 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 4808 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 4911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 4808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:54,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 1012 Invalid, 4911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 4808 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 17:44:54,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2022-01-18 17:44:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 2086. [2022-01-18 17:44:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 3.5851318944844124) internal successors, (7475), 2085 states have internal predecessors, (7475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 7475 transitions. [2022-01-18 17:44:54,075 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 7475 transitions. Word has length 26 [2022-01-18 17:44:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:54,075 INFO L470 AbstractCegarLoop]: Abstraction has 2086 states and 7475 transitions. [2022-01-18 17:44:54,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 7475 transitions. [2022-01-18 17:44:54,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:54,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:54,078 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, 1, 1, 1] [2022-01-18 17:44:54,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:54,278 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,SelfDestructingSolverStorable46 [2022-01-18 17:44:54,279 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:54,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:54,279 INFO L85 PathProgramCache]: Analyzing trace with hash 296771640, now seen corresponding path program 9 times [2022-01-18 17:44:54,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:54,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13964255] [2022-01-18 17:44:54,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:54,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:54,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:54,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13964255] [2022-01-18 17:44:54,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13964255] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:54,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964407925] [2022-01-18 17:44:54,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:44:54,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:54,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:54,445 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:54,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 17:44:54,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:44:54,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:54,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:44:54,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:54,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:54,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:54,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 17:44:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:54,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:54,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:54,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:54,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-18 17:44:55,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:55,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:55,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:55,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-18 17:44:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:55,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964407925] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:55,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:55,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:44:55,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594980060] [2022-01-18 17:44:55,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:55,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:44:55,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:55,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:44:55,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:44:55,238 INFO L87 Difference]: Start difference. First operand 2086 states and 7475 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 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) [2022-01-18 17:44:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:56,939 INFO L93 Difference]: Finished difference Result 4142 states and 13554 transitions. [2022-01-18 17:44:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:44:56,939 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 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 26 [2022-01-18 17:44:56,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:56,947 INFO L225 Difference]: With dead ends: 4142 [2022-01-18 17:44:56,947 INFO L226 Difference]: Without dead ends: 4112 [2022-01-18 17:44:56,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=664, Invalid=2642, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 17:44:56,948 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 432 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:56,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 303 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:44:56,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4112 states. [2022-01-18 17:44:56,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4112 to 2109. [2022-01-18 17:44:56,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 2108 states have (on average 3.584440227703985) internal successors, (7556), 2108 states have internal predecessors, (7556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 7556 transitions. [2022-01-18 17:44:56,990 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 7556 transitions. Word has length 26 [2022-01-18 17:44:56,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:56,990 INFO L470 AbstractCegarLoop]: Abstraction has 2109 states and 7556 transitions. [2022-01-18 17:44:56,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 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) [2022-01-18 17:44:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 7556 transitions. [2022-01-18 17:44:56,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:56,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:56,994 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, 1, 1, 1] [2022-01-18 17:44:57,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-18 17:44:57,194 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,SelfDestructingSolverStorable47 [2022-01-18 17:44:57,195 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:57,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:57,195 INFO L85 PathProgramCache]: Analyzing trace with hash -188355452, now seen corresponding path program 10 times [2022-01-18 17:44:57,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:57,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961048946] [2022-01-18 17:44:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:57,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:57,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:57,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961048946] [2022-01-18 17:44:57,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961048946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:57,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824330426] [2022-01-18 17:44:57,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:44:57,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:57,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:57,369 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:57,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 17:44:57,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:44:57,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:57,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:44:57,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:57,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:57,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:57,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 17:44:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:57,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:57,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:57,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:57,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-18 17:44:57,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:57,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:57,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:57,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:44:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:58,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824330426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:58,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:58,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:44:58,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935663773] [2022-01-18 17:44:58,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:58,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:44:58,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:58,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:44:58,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:44:58,207 INFO L87 Difference]: Start difference. First operand 2109 states and 7556 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:59,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:59,905 INFO L93 Difference]: Finished difference Result 4248 states and 13899 transitions. [2022-01-18 17:44:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 17:44:59,906 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:44:59,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:59,913 INFO L225 Difference]: With dead ends: 4248 [2022-01-18 17:44:59,913 INFO L226 Difference]: Without dead ends: 4233 [2022-01-18 17:44:59,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=710, Invalid=2950, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:44:59,914 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 419 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:59,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 340 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1453 Invalid, 0 Unknown, 16 Unchecked, 0.6s Time] [2022-01-18 17:44:59,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4233 states. [2022-01-18 17:44:59,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4233 to 2123. [2022-01-18 17:44:59,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 3.5810556079170595) internal successors, (7599), 2122 states have internal predecessors, (7599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:59,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 7599 transitions. [2022-01-18 17:44:59,956 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 7599 transitions. Word has length 26 [2022-01-18 17:44:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:59,956 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 7599 transitions. [2022-01-18 17:44:59,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 7599 transitions. [2022-01-18 17:44:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:59,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:59,960 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, 1, 1, 1] [2022-01-18 17:44:59,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:00,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:00,161 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:00,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2045752042, now seen corresponding path program 11 times [2022-01-18 17:45:00,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:00,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311910248] [2022-01-18 17:45:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:00,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:00,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:00,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311910248] [2022-01-18 17:45:00,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311910248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:00,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540229014] [2022-01-18 17:45:00,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:45:00,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:00,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:00,344 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:45:00,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 17:45:00,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:45:00,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:00,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:45:00,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:00,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:00,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:00,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-18 17:45:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:00,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:00,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:00,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:00,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-18 17:45:00,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:00,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:00,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:00,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:45:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:01,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540229014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:01,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:01,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 17:45:01,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973794714] [2022-01-18 17:45:01,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:01,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:45:01,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:01,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:45:01,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:45:01,190 INFO L87 Difference]: Start difference. First operand 2123 states and 7599 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:05,288 INFO L93 Difference]: Finished difference Result 4932 states and 15729 transitions. [2022-01-18 17:45:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 17:45:05,288 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:05,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:05,300 INFO L225 Difference]: With dead ends: 4932 [2022-01-18 17:45:05,301 INFO L226 Difference]: Without dead ends: 4895 [2022-01-18 17:45:05,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3808 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1415, Invalid=9505, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 17:45:05,303 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 605 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:05,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 543 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2213 Invalid, 0 Unknown, 114 Unchecked, 1.0s Time] [2022-01-18 17:45:05,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4895 states. [2022-01-18 17:45:05,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4895 to 2161. [2022-01-18 17:45:05,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 2160 states have (on average 3.5800925925925924) internal successors, (7733), 2160 states have internal predecessors, (7733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 7733 transitions. [2022-01-18 17:45:05,358 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 7733 transitions. Word has length 26 [2022-01-18 17:45:05,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:05,359 INFO L470 AbstractCegarLoop]: Abstraction has 2161 states and 7733 transitions. [2022-01-18 17:45:05,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:05,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 7733 transitions. [2022-01-18 17:45:05,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:05,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:05,362 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, 1, 1, 1] [2022-01-18 17:45:05,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 17:45:05,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 17:45:05,563 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:05,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:05,563 INFO L85 PathProgramCache]: Analyzing trace with hash 625931212, now seen corresponding path program 12 times [2022-01-18 17:45:05,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:05,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985286892] [2022-01-18 17:45:05,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:05,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:05,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:05,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985286892] [2022-01-18 17:45:05,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985286892] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:05,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152199427] [2022-01-18 17:45:05,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:45:05,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:05,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:05,711 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:45:05,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 17:45:05,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:45:05,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:05,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:45:05,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:05,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:05,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2022-01-18 17:45:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:06,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:06,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:06,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:06,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:06,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-18 17:45:06,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:06,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-01-18 17:45:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:06,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152199427] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:06,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:06,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-01-18 17:45:06,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683403888] [2022-01-18 17:45:06,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:06,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:45:06,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:06,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:45:06,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:45:06,514 INFO L87 Difference]: Start difference. First operand 2161 states and 7733 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:09,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:09,812 INFO L93 Difference]: Finished difference Result 4609 states and 15323 transitions. [2022-01-18 17:45:09,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 17:45:09,813 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:09,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:09,820 INFO L225 Difference]: With dead ends: 4609 [2022-01-18 17:45:09,820 INFO L226 Difference]: Without dead ends: 4579 [2022-01-18 17:45:09,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1143, Invalid=5663, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 17:45:09,821 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 618 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:09,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 300 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:45:09,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2022-01-18 17:45:09,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 2180. [2022-01-18 17:45:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 3.5851307939421755) internal successors, (7812), 2179 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 7812 transitions. [2022-01-18 17:45:09,863 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 7812 transitions. Word has length 26 [2022-01-18 17:45:09,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:09,863 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 7812 transitions. [2022-01-18 17:45:09,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:09,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 7812 transitions. [2022-01-18 17:45:09,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:09,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:09,867 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, 1, 1, 1] [2022-01-18 17:45:09,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-18 17:45:10,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:10,068 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:10,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:10,068 INFO L85 PathProgramCache]: Analyzing trace with hash -633075064, now seen corresponding path program 13 times [2022-01-18 17:45:10,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:10,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166047878] [2022-01-18 17:45:10,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:10,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:10,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:10,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166047878] [2022-01-18 17:45:10,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166047878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:10,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341506748] [2022-01-18 17:45:10,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:45:10,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:10,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:10,216 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:45:10,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 17:45:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:10,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:45:10,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:10,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:10,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:10,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-18 17:45:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:10,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:10,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:10,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:10,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-18 17:45:10,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:10,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:10,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:10,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-18 17:45:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:10,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341506748] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:10,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:10,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 17:45:10,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677411989] [2022-01-18 17:45:10,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:10,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:45:10,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:10,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:45:10,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:45:10,983 INFO L87 Difference]: Start difference. First operand 2180 states and 7812 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2022-01-18 17:45:13,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:13,882 INFO L93 Difference]: Finished difference Result 5385 states and 17692 transitions. [2022-01-18 17:45:13,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 17:45:13,882 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 26 [2022-01-18 17:45:13,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:13,892 INFO L225 Difference]: With dead ends: 5385 [2022-01-18 17:45:13,892 INFO L226 Difference]: Without dead ends: 5355 [2022-01-18 17:45:13,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2357 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1313, Invalid=5329, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 17:45:13,893 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 491 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:13,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 432 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1683 Invalid, 0 Unknown, 163 Unchecked, 0.8s Time] [2022-01-18 17:45:13,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5355 states. [2022-01-18 17:45:13,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5355 to 2218. [2022-01-18 17:45:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 3.6017140279657194) internal successors, (7985), 2217 states have internal predecessors, (7985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 7985 transitions. [2022-01-18 17:45:13,945 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 7985 transitions. Word has length 26 [2022-01-18 17:45:13,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:13,945 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 7985 transitions. [2022-01-18 17:45:13,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2022-01-18 17:45:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 7985 transitions. [2022-01-18 17:45:13,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:13,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:13,949 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, 1, 1, 1] [2022-01-18 17:45:13,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:14,150 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,SelfDestructingSolverStorable51 [2022-01-18 17:45:14,150 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:14,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:14,150 INFO L85 PathProgramCache]: Analyzing trace with hash -609175150, now seen corresponding path program 14 times [2022-01-18 17:45:14,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:14,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601973434] [2022-01-18 17:45:14,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:14,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:14,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:14,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601973434] [2022-01-18 17:45:14,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601973434] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:14,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888507215] [2022-01-18 17:45:14,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:45:14,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:14,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:14,318 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:45:14,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 17:45:14,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:45:14,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:14,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:45:14,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:14,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:14,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:14,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 17:45:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:14,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:14,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:14,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:14,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-18 17:45:14,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:14,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:14,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:14,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:45:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:15,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888507215] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:15,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:15,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-01-18 17:45:15,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593435237] [2022-01-18 17:45:15,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:15,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:45:15,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:15,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:45:15,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:45:15,163 INFO L87 Difference]: Start difference. First operand 2218 states and 7985 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:18,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:18,792 INFO L93 Difference]: Finished difference Result 5844 states and 18922 transitions. [2022-01-18 17:45:18,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 17:45:18,793 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:18,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:18,803 INFO L225 Difference]: With dead ends: 5844 [2022-01-18 17:45:18,803 INFO L226 Difference]: Without dead ends: 5814 [2022-01-18 17:45:18,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1521, Invalid=7221, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 17:45:18,804 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 581 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 2814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:18,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 661 Invalid, 2814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2353 Invalid, 0 Unknown, 324 Unchecked, 1.1s Time] [2022-01-18 17:45:18,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5814 states. [2022-01-18 17:45:18,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5814 to 2225. [2022-01-18 17:45:18,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2224 states have (on average 3.600269784172662) internal successors, (8007), 2224 states have internal predecessors, (8007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 8007 transitions. [2022-01-18 17:45:18,860 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 8007 transitions. Word has length 26 [2022-01-18 17:45:18,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:18,860 INFO L470 AbstractCegarLoop]: Abstraction has 2225 states and 8007 transitions. [2022-01-18 17:45:18,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:18,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 8007 transitions. [2022-01-18 17:45:18,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:18,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:18,863 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, 1, 1, 1] [2022-01-18 17:45:18,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 17:45:19,064 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,SelfDestructingSolverStorable52 [2022-01-18 17:45:19,064 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:19,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:19,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1129796424, now seen corresponding path program 15 times [2022-01-18 17:45:19,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:19,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891918615] [2022-01-18 17:45:19,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:19,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:19,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:19,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891918615] [2022-01-18 17:45:19,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891918615] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:19,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098709466] [2022-01-18 17:45:19,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:45:19,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:19,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:19,228 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:45:19,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 17:45:19,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:45:19,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:19,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:45:19,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:19,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:19,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:19,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 17:45:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:19,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:19,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:19,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:19,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-18 17:45:19,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:19,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:19,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:19,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:45:20,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:20,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098709466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:20,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:20,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:45:20,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350742987] [2022-01-18 17:45:20,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:20,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:45:20,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:20,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:45:20,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:45:20,045 INFO L87 Difference]: Start difference. First operand 2225 states and 8007 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:22,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:22,350 INFO L93 Difference]: Finished difference Result 4509 states and 14824 transitions. [2022-01-18 17:45:22,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:45:22,350 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:22,359 INFO L225 Difference]: With dead ends: 4509 [2022-01-18 17:45:22,359 INFO L226 Difference]: Without dead ends: 4494 [2022-01-18 17:45:22,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1012, Invalid=3958, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 17:45:22,360 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 448 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:22,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 384 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1349 Invalid, 0 Unknown, 452 Unchecked, 0.7s Time] [2022-01-18 17:45:22,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2022-01-18 17:45:22,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 2231. [2022-01-18 17:45:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2230 states have (on average 3.602242152466368) internal successors, (8033), 2230 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:22,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 8033 transitions. [2022-01-18 17:45:22,407 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 8033 transitions. Word has length 26 [2022-01-18 17:45:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:22,407 INFO L470 AbstractCegarLoop]: Abstraction has 2231 states and 8033 transitions. [2022-01-18 17:45:22,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 8033 transitions. [2022-01-18 17:45:22,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:22,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:22,410 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, 1, 1, 1] [2022-01-18 17:45:22,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 17:45:22,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:22,611 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:22,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:22,611 INFO L85 PathProgramCache]: Analyzing trace with hash 2114590172, now seen corresponding path program 16 times [2022-01-18 17:45:22,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:22,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572153213] [2022-01-18 17:45:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:22,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:22,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:22,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572153213] [2022-01-18 17:45:22,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572153213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:22,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234641484] [2022-01-18 17:45:22,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:45:22,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:22,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:22,761 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:45:22,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 17:45:22,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:45:22,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:22,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:45:22,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:22,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:22,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:22,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-18 17:45:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:23,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:23,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:23,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:23,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-18 17:45:23,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:23,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:23,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:23,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-18 17:45:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:23,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234641484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:23,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:23,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 17:45:23,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420045022] [2022-01-18 17:45:23,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:23,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:45:23,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:23,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:45:23,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:45:23,578 INFO L87 Difference]: Start difference. First operand 2231 states and 8033 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:25,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:25,647 INFO L93 Difference]: Finished difference Result 4741 states and 15644 transitions. [2022-01-18 17:45:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:45:25,647 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 26 [2022-01-18 17:45:25,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:25,656 INFO L225 Difference]: With dead ends: 4741 [2022-01-18 17:45:25,656 INFO L226 Difference]: Without dead ends: 4726 [2022-01-18 17:45:25,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=911, Invalid=3511, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:45:25,657 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 600 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 641 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:25,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 449 Invalid, 2049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1218 Invalid, 0 Unknown, 641 Unchecked, 0.6s Time] [2022-01-18 17:45:25,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4726 states. [2022-01-18 17:45:25,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4726 to 2225. [2022-01-18 17:45:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2224 states have (on average 3.6011690647482015) internal successors, (8009), 2224 states have internal predecessors, (8009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:25,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 8009 transitions. [2022-01-18 17:45:25,701 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 8009 transitions. Word has length 26 [2022-01-18 17:45:25,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:25,701 INFO L470 AbstractCegarLoop]: Abstraction has 2225 states and 8009 transitions. [2022-01-18 17:45:25,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 8009 transitions. [2022-01-18 17:45:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:25,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:25,704 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, 1, 1, 1] [2022-01-18 17:45:25,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-18 17:45:25,904 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,SelfDestructingSolverStorable54 [2022-01-18 17:45:25,905 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:25,905 INFO L85 PathProgramCache]: Analyzing trace with hash 70439872, now seen corresponding path program 17 times [2022-01-18 17:45:25,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:25,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101251619] [2022-01-18 17:45:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:25,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:26,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:26,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101251619] [2022-01-18 17:45:26,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101251619] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:26,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579769664] [2022-01-18 17:45:26,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:45:26,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:26,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:26,073 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:45:26,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 17:45:26,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:45:26,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:26,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:45:26,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:26,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:26,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:26,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:26,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2022-01-18 17:45:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:26,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:26,547 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:45:26,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-18 17:45:26,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:26,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:26,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:26,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:45:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:26,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579769664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:26,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:26,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:45:26,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840688271] [2022-01-18 17:45:26,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:26,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:45:26,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:26,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:45:26,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:45:26,863 INFO L87 Difference]: Start difference. First operand 2225 states and 8009 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:28,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:28,900 INFO L93 Difference]: Finished difference Result 4091 states and 13736 transitions. [2022-01-18 17:45:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 17:45:28,902 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:28,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:28,909 INFO L225 Difference]: With dead ends: 4091 [2022-01-18 17:45:28,910 INFO L226 Difference]: Without dead ends: 4076 [2022-01-18 17:45:28,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=625, Invalid=3931, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:45:28,911 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 252 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:28,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 439 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1759 Invalid, 0 Unknown, 82 Unchecked, 0.7s Time] [2022-01-18 17:45:28,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2022-01-18 17:45:28,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 2246. [2022-01-18 17:45:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2246 states, 2245 states have (on average 3.598218262806236) internal successors, (8078), 2245 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:28,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 8078 transitions. [2022-01-18 17:45:28,953 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 8078 transitions. Word has length 26 [2022-01-18 17:45:28,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:28,954 INFO L470 AbstractCegarLoop]: Abstraction has 2246 states and 8078 transitions. [2022-01-18 17:45:28,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:28,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 8078 transitions. [2022-01-18 17:45:28,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:28,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:28,958 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, 1, 1, 1] [2022-01-18 17:45:28,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 17:45:29,158 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,SelfDestructingSolverStorable55 [2022-01-18 17:45:29,158 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:29,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:29,158 INFO L85 PathProgramCache]: Analyzing trace with hash -374279740, now seen corresponding path program 18 times [2022-01-18 17:45:29,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:29,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899775121] [2022-01-18 17:45:29,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:29,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:29,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:29,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899775121] [2022-01-18 17:45:29,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899775121] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:29,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084722922] [2022-01-18 17:45:29,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:45:29,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:29,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:29,321 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:45:29,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 17:45:29,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:45:29,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:29,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:45:29,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:29,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:29,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:29,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-18 17:45:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:29,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:29,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:29,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:29,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-18 17:45:29,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:29,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:29,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:29,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-18 17:45:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:30,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084722922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:30,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:30,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 17:45:30,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914102916] [2022-01-18 17:45:30,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:30,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:45:30,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:30,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:45:30,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:45:30,099 INFO L87 Difference]: Start difference. First operand 2246 states and 8078 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2022-01-18 17:45:32,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:32,197 INFO L93 Difference]: Finished difference Result 4879 states and 15986 transitions. [2022-01-18 17:45:32,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 17:45:32,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 26 [2022-01-18 17:45:32,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:32,206 INFO L225 Difference]: With dead ends: 4879 [2022-01-18 17:45:32,206 INFO L226 Difference]: Without dead ends: 4811 [2022-01-18 17:45:32,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=863, Invalid=3829, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:45:32,207 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 428 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:32,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 411 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1247 Invalid, 0 Unknown, 397 Unchecked, 0.6s Time] [2022-01-18 17:45:32,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2022-01-18 17:45:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 2302. [2022-01-18 17:45:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 3.612342459800087) internal successors, (8312), 2301 states have internal predecessors, (8312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:32,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 8312 transitions. [2022-01-18 17:45:32,254 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 8312 transitions. Word has length 26 [2022-01-18 17:45:32,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:32,254 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 8312 transitions. [2022-01-18 17:45:32,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2022-01-18 17:45:32,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 8312 transitions. [2022-01-18 17:45:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:32,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:32,258 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, 1, 1, 1] [2022-01-18 17:45:32,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 17:45:32,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:32,467 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:32,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:32,467 INFO L85 PathProgramCache]: Analyzing trace with hash 347233680, now seen corresponding path program 19 times [2022-01-18 17:45:32,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:32,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427730791] [2022-01-18 17:45:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:32,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:32,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:32,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427730791] [2022-01-18 17:45:32,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427730791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:32,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133608416] [2022-01-18 17:45:32,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:45:32,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:32,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:32,638 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:45:32,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 17:45:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:32,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:45:32,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:32,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:32,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:32,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 17:45:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:32,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:33,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:33,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:33,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-18 17:45:33,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:33,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:33,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:33,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-18 17:45:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:33,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133608416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:33,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:33,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 17:45:33,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442454665] [2022-01-18 17:45:33,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:33,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:45:33,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:33,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:45:33,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:45:33,401 INFO L87 Difference]: Start difference. First operand 2302 states and 8312 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2022-01-18 17:45:35,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:35,032 INFO L93 Difference]: Finished difference Result 4341 states and 14262 transitions. [2022-01-18 17:45:35,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 17:45:35,032 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 26 [2022-01-18 17:45:35,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:35,040 INFO L225 Difference]: With dead ends: 4341 [2022-01-18 17:45:35,040 INFO L226 Difference]: Without dead ends: 4249 [2022-01-18 17:45:35,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=565, Invalid=2515, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 17:45:35,041 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 312 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:35,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 350 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:45:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4249 states. [2022-01-18 17:45:35,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4249 to 2427. [2022-01-18 17:45:35,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2426 states have (on average 3.5956306677658696) internal successors, (8723), 2426 states have internal predecessors, (8723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:35,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 8723 transitions. [2022-01-18 17:45:35,084 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 8723 transitions. Word has length 26 [2022-01-18 17:45:35,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:35,084 INFO L470 AbstractCegarLoop]: Abstraction has 2427 states and 8723 transitions. [2022-01-18 17:45:35,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2022-01-18 17:45:35,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 8723 transitions. [2022-01-18 17:45:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:35,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:35,087 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, 1, 1, 1] [2022-01-18 17:45:35,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 17:45:35,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:35,289 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:35,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:35,289 INFO L85 PathProgramCache]: Analyzing trace with hash -911772596, now seen corresponding path program 20 times [2022-01-18 17:45:35,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:35,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685720478] [2022-01-18 17:45:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:35,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:35,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:35,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685720478] [2022-01-18 17:45:35,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685720478] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:35,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4944010] [2022-01-18 17:45:35,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:45:35,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:35,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:35,448 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:45:35,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 17:45:35,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:45:35,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:35,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:45:35,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:35,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:35,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:35,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:35,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:35,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:35,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-01-18 17:45:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:35,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:35,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:35,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:35,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-18 17:45:36,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:36,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:36,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:36,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-18 17:45:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:36,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4944010] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:36,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:36,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 17:45:36,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25839332] [2022-01-18 17:45:36,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:36,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:45:36,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:45:36,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:45:36,234 INFO L87 Difference]: Start difference. First operand 2427 states and 8723 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2022-01-18 17:45:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:38,303 INFO L93 Difference]: Finished difference Result 4824 states and 15724 transitions. [2022-01-18 17:45:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 17:45:38,303 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 26 [2022-01-18 17:45:38,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:38,311 INFO L225 Difference]: With dead ends: 4824 [2022-01-18 17:45:38,311 INFO L226 Difference]: Without dead ends: 4737 [2022-01-18 17:45:38,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=802, Invalid=3358, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:45:38,312 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 375 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:38,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 404 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1448 Invalid, 0 Unknown, 135 Unchecked, 0.7s Time] [2022-01-18 17:45:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4737 states. [2022-01-18 17:45:38,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4737 to 2424. [2022-01-18 17:45:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 3.5988444077589765) internal successors, (8720), 2423 states have internal predecessors, (8720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 8720 transitions. [2022-01-18 17:45:38,358 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 8720 transitions. Word has length 26 [2022-01-18 17:45:38,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:38,358 INFO L470 AbstractCegarLoop]: Abstraction has 2424 states and 8720 transitions. [2022-01-18 17:45:38,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2022-01-18 17:45:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 8720 transitions. [2022-01-18 17:45:38,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:38,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:38,362 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, 1, 1, 1] [2022-01-18 17:45:38,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:38,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:38,562 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:38,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:38,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1454516880, now seen corresponding path program 21 times [2022-01-18 17:45:38,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:38,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215583170] [2022-01-18 17:45:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:38,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:38,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:38,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215583170] [2022-01-18 17:45:38,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215583170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:38,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828638090] [2022-01-18 17:45:38,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:45:38,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:38,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:38,752 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:45:38,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 17:45:38,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:45:38,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:38,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:45:38,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:38,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:38,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 Received shutdown request... [2022-01-18 17:57:00,874 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-18 17:57:00,876 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 17:57:00,879 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 17:57:00,879 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 17:57:00,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 17:57:01,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 17:57:01,076 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. [2022-01-18 17:57:01,078 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 17:57:01,078 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 17:57:01,078 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 17:57:01,080 INFO L732 BasicCegarLoop]: Path program histogram: [36, 21, 1, 1, 1] [2022-01-18 17:57:01,081 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 17:57:01,081 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 17:57:01,082 INFO L202 PluginConnector]: Adding new model sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 05:57:01 BasicIcfg [2022-01-18 17:57:01,082 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 17:57:01,082 INFO L158 Benchmark]: Toolchain (without parser) took 810396.76ms. Allocated memory was 474.0MB in the beginning and 765.5MB in the end (delta: 291.5MB). Free memory was 430.9MB in the beginning and 376.2MB in the end (delta: 54.7MB). Peak memory consumption was 465.2MB. Max. memory is 16.0GB. [2022-01-18 17:57:01,082 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 474.0MB. Free memory is still 432.0MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:57:01,083 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.03ms. Allocated memory is still 474.0MB. Free memory was 430.8MB in the beginning and 429.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 17:57:01,083 INFO L158 Benchmark]: Boogie Preprocessor took 14.01ms. Allocated memory is still 474.0MB. Free memory was 429.3MB in the beginning and 428.3MB in the end (delta: 974.3kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:57:01,083 INFO L158 Benchmark]: RCFGBuilder took 176.50ms. Allocated memory is still 474.0MB. Free memory was 428.2MB in the beginning and 419.0MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 17:57:01,083 INFO L158 Benchmark]: TraceAbstraction took 810183.41ms. Allocated memory was 474.0MB in the beginning and 765.5MB in the end (delta: 291.5MB). Free memory was 418.6MB in the beginning and 376.2MB in the end (delta: 42.4MB). Peak memory consumption was 452.6MB. Max. memory is 16.0GB. [2022-01-18 17:57:01,083 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 474.0MB. Free memory is still 432.0MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 19.03ms. Allocated memory is still 474.0MB. Free memory was 430.8MB in the beginning and 429.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 14.01ms. Allocated memory is still 474.0MB. Free memory was 429.3MB in the beginning and 428.3MB in the end (delta: 974.3kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 176.50ms. Allocated memory is still 474.0MB. Free memory was 428.2MB in the beginning and 419.0MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 810183.41ms. Allocated memory was 474.0MB in the beginning and 765.5MB in the end (delta: 291.5MB). Free memory was 418.6MB in the beginning and 376.2MB in the end (delta: 42.4MB). Peak memory consumption was 452.6MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 810.1s, OverallIterations: 60, TraceHistogramMax: 2, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.1s, AutomataDifference: 84.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 20016 SdHoareTripleChecker+Valid, 24.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 20016 mSDsluCounter, 15086 SdHoareTripleChecker+Invalid, 20.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 4069 IncrementalHoareTripleChecker+Unchecked, 26480 mSDsCounter, 4126 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 53701 IncrementalHoareTripleChecker+Invalid, 61896 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4126 mSolverCounterUnsat, 1450 mSDtfsCounter, 53701 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5450 GetRequests, 2111 SyntacticMatches, 159 SemanticMatches, 3180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84693 ImplicationChecksByTransitivity, 65.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2427occurred in iteration=58, InterpolantAutomatonStates: 2741, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.8s AutomataMinimizationTime, 59 MinimizatonAttempts, 101482 StatesRemovedByMinimization, 59 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 27.5s InterpolantComputationTime, 2802 NumberOfCodeBlocks, 2796 NumberOfCodeBlocksAsserted, 176 NumberOfCheckSat, 4003 ConstructedInterpolants, 29 QuantifiedInterpolants, 44605 SizeOfPredicates, 533 NumberOfNonLiveVariables, 3467 ConjunctsInSsa, 816 ConjunctsInUnsatCore, 171 InterpolantComputations, 3 PerfectInterpolantSequences, 174/848 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown