/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:36:43,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:36:43,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:36:43,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:36:43,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:36:43,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:36:43,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:36:43,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:36:43,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:36:43,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:36:43,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:36:43,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:36:43,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:36:43,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:36:43,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:36:43,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:36:43,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:36:43,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:36:43,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:36:43,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:36:43,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:36:43,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:36:43,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:36:43,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:36:43,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 06:36:43,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:36:43,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:36:43,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:36:43,826 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:36:43,839 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:36:43,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:36:43,839 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:36:43,839 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:36:43,840 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:36:43,840 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:36:43,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:36:43,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:36:43,840 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:36:43,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:36:43,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:36:43,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:36:43,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:36:43,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:36:43,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:36:43,841 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:36:43,841 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:36:43,841 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:36:43,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:36:43,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:36:43,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:36:43,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:36:43,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:36:43,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:36:43,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:36:43,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:36:43,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:36:43,842 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:36:43,842 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:36:43,842 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:36:43,842 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:36:43,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:36:43,842 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:36:43,842 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:36:44,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:36:44,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:36:44,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:36:44,064 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:36:44,065 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:36:44,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi02-2.c [2022-01-10 06:36:44,112 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6c02567/b5da29b3bc964d5088cc3ef4e17808f0/FLAG7df398650 [2022-01-10 06:36:44,475 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:36:44,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi02-2.c [2022-01-10 06:36:44,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6c02567/b5da29b3bc964d5088cc3ef4e17808f0/FLAG7df398650 [2022-01-10 06:36:44,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6c02567/b5da29b3bc964d5088cc3ef4e17808f0 [2022-01-10 06:36:44,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:36:44,499 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:36:44,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:36:44,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:36:44,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:36:44,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63d4047d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44, skipping insertion in model container [2022-01-10 06:36:44,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:36:44,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:36:44,701 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi02-2.c[839,852] [2022-01-10 06:36:44,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:36:44,711 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:36:44,724 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi02-2.c[839,852] [2022-01-10 06:36:44,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:36:44,736 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:36:44,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44 WrapperNode [2022-01-10 06:36:44,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:36:44,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:36:44,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:36:44,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:36:44,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,756 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2022-01-10 06:36:44,756 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:36:44,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:36:44,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:36:44,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:36:44,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:36:44,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:36:44,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:36:44,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:36:44,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:36:44,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:36:44,790 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) [2022-01-10 06:36:44,796 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 [2022-01-10 06:36:44,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:36:44,818 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-01-10 06:36:44,818 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-01-10 06:36:44,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:36:44,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:36:44,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:36:44,854 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:36:44,855 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:36:44,922 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:36:44,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:36:44,926 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 06:36:44,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:36:44 BoogieIcfgContainer [2022-01-10 06:36:44,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:36:44,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:36:44,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:36:44,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:36:44,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:36:44" (1/3) ... [2022-01-10 06:36:44,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a31fef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:36:44, skipping insertion in model container [2022-01-10 06:36:44,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (2/3) ... [2022-01-10 06:36:44,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a31fef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:36:44, skipping insertion in model container [2022-01-10 06:36:44,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:36:44" (3/3) ... [2022-01-10 06:36:44,933 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi02-2.c [2022-01-10 06:36:44,936 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:36:44,936 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:36:44,965 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:36:44,969 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=PETRI_NET, 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 [2022-01-10 06:36:44,969 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:36:44,978 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:36:44,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 06:36:44,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:44,982 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:44,982 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:44,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:44,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2022-01-10 06:36:44,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:44,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559606692] [2022-01-10 06:36:44,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:44,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:44,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:44,996 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:45,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:36:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:45,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:36:45,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:36:45,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:36:45,248 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:45,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559606692] [2022-01-10 06:36:45,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559606692] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:36:45,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:36:45,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:36:45,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393171445] [2022-01-10 06:36:45,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:36:45,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:36:45,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:45,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:36:45,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:36:45,270 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:36:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:45,299 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-01-10 06:36:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:36:45,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-10 06:36:45,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:45,305 INFO L225 Difference]: With dead ends: 29 [2022-01-10 06:36:45,305 INFO L226 Difference]: Without dead ends: 16 [2022-01-10 06:36:45,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:36:45,309 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:45,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:36:45,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-10 06:36:45,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-10 06:36:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 06:36:45,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-01-10 06:36:45,334 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-01-10 06:36:45,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:45,335 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-01-10 06:36:45,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:36:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-01-10 06:36:45,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 06:36:45,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:45,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:45,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:45,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:45,543 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:45,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:45,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2022-01-10 06:36:45,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:45,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683829772] [2022-01-10 06:36:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:45,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:45,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:45,546 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:45,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:36:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:45,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:36:45,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:36:45,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:36:45,842 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:45,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683829772] [2022-01-10 06:36:45,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683829772] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:45,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:45,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 06:36:45,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436607131] [2022-01-10 06:36:45,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:45,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:36:45,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:45,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:36:45,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:36:45,851 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 06:36:45,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:45,894 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-01-10 06:36:45,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:36:45,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 17 [2022-01-10 06:36:45,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:45,895 INFO L225 Difference]: With dead ends: 28 [2022-01-10 06:36:45,895 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 06:36:45,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:36:45,896 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:45,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:36:45,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 06:36:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-10 06:36:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:36:45,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-01-10 06:36:45,904 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-01-10 06:36:45,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:45,904 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-01-10 06:36:45,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 06:36:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-01-10 06:36:45,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 06:36:45,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:45,905 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:45,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:46,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:46,112 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:46,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:46,113 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2022-01-10 06:36:46,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:46,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106129487] [2022-01-10 06:36:46,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:36:46,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:46,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:46,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:46,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:36:46,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:36:46,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:46,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:36:46,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 06:36:46,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 06:36:46,554 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:46,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106129487] [2022-01-10 06:36:46,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106129487] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:46,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:46,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-01-10 06:36:46,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504641933] [2022-01-10 06:36:46,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:46,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:36:46,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:46,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:36:46,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:36:46,556 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 12 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-10 06:36:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:46,685 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-01-10 06:36:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 06:36:46,685 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 12 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) Word has length 29 [2022-01-10 06:36:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:46,686 INFO L225 Difference]: With dead ends: 40 [2022-01-10 06:36:46,686 INFO L226 Difference]: Without dead ends: 34 [2022-01-10 06:36:46,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:36:46,687 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:46,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 188 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:36:46,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-10 06:36:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-10 06:36:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:36:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-01-10 06:36:46,692 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-01-10 06:36:46,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:46,692 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-01-10 06:36:46,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 12 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-10 06:36:46,693 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-01-10 06:36:46,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 06:36:46,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:46,694 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:46,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:46,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:46,900 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:46,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:46,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1906255628, now seen corresponding path program 3 times [2022-01-10 06:36:46,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:46,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992515005] [2022-01-10 06:36:46,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:36:46,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:46,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:46,903 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:46,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:36:46,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-10 06:36:46,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:46,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:36:46,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-01-10 06:36:47,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-01-10 06:36:48,056 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:48,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992515005] [2022-01-10 06:36:48,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992515005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:48,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:48,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-01-10 06:36:48,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585305168] [2022-01-10 06:36:48,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:48,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-10 06:36:48,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:48,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-10 06:36:48,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 06:36:48,058 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 20 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2022-01-10 06:36:48,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:48,709 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2022-01-10 06:36:48,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-10 06:36:48,710 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 20 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 53 [2022-01-10 06:36:48,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:48,711 INFO L225 Difference]: With dead ends: 64 [2022-01-10 06:36:48,711 INFO L226 Difference]: Without dead ends: 58 [2022-01-10 06:36:48,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=382, Invalid=1874, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 06:36:48,712 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:48,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 456 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:48,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-10 06:36:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-01-10 06:36:48,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:36:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-01-10 06:36:48,719 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2022-01-10 06:36:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:48,719 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-01-10 06:36:48,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 20 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2022-01-10 06:36:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-01-10 06:36:48,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-10 06:36:48,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:48,721 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:48,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 06:36:48,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:48,927 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:48,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:48,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1760839668, now seen corresponding path program 4 times [2022-01-10 06:36:48,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:48,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141538098] [2022-01-10 06:36:48,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:36:48,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:48,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:48,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:48,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:36:48,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:36:48,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:49,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-10 06:36:49,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-01-10 06:36:49,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-01-10 06:36:53,173 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:53,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141538098] [2022-01-10 06:36:53,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141538098] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:53,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:53,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2022-01-10 06:36:53,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957651055] [2022-01-10 06:36:53,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:53,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-10 06:36:53,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:53,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-10 06:36:53,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3940, Unknown=0, NotChecked=0, Total=4556 [2022-01-10 06:36:53,176 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 68 states, 68 states have (on average 1.088235294117647) internal successors, (74), 36 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2022-01-10 06:36:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:56,713 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2022-01-10 06:36:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-10 06:36:56,714 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.088235294117647) internal successors, (74), 36 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) Word has length 101 [2022-01-10 06:36:56,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:56,715 INFO L225 Difference]: With dead ends: 112 [2022-01-10 06:36:56,715 INFO L226 Difference]: Without dead ends: 106 [2022-01-10 06:36:56,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1526, Invalid=7594, Unknown=0, NotChecked=0, Total=9120 [2022-01-10 06:36:56,719 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:56,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1323 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:36:56,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-10 06:36:56,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-01-10 06:36:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 72 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (33), 32 states have call predecessors, (33), 2 states have call successors, (33) [2022-01-10 06:36:56,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-01-10 06:36:56,730 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2022-01-10 06:36:56,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:56,746 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-01-10 06:36:56,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.088235294117647) internal successors, (74), 36 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2022-01-10 06:36:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-01-10 06:36:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-10 06:36:56,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:56,749 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:56,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:56,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:56,950 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:56,950 INFO L85 PathProgramCache]: Analyzing trace with hash 422913524, now seen corresponding path program 5 times [2022-01-10 06:36:56,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:56,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888730405] [2022-01-10 06:36:56,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:36:56,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:56,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:56,952 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:56,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:36:57,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-01-10 06:36:57,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:57,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 67 conjunts are in the unsatisfiable core [2022-01-10 06:36:57,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2022-01-10 06:36:57,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 2418 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-01-10 06:37:08,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888730405] [2022-01-10 06:37:08,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888730405] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:08,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:08,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 67] total 69 [2022-01-10 06:37:08,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360052798] [2022-01-10 06:37:08,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:08,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-10 06:37:08,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:08,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-10 06:37:08,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2022-01-10 06:37:08,363 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 69 states, 67 states have (on average 2.044776119402985) internal successors, (137), 69 states have internal predecessors, (137), 34 states have call successors, (34), 1 states have call predecessors, (34), 32 states have return successors, (64), 32 states have call predecessors, (64), 34 states have call successors, (64) [2022-01-10 06:37:09,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:09,657 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2022-01-10 06:37:09,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-10 06:37:09,658 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 2.044776119402985) internal successors, (137), 69 states have internal predecessors, (137), 34 states have call successors, (34), 1 states have call predecessors, (34), 32 states have return successors, (64), 32 states have call predecessors, (64), 34 states have call successors, (64) Word has length 197 [2022-01-10 06:37:09,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:09,661 INFO L225 Difference]: With dead ends: 113 [2022-01-10 06:37:09,661 INFO L226 Difference]: Without dead ends: 109 [2022-01-10 06:37:09,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 305 SyntacticMatches, 20 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1352, Invalid=8748, Unknown=0, NotChecked=0, Total=10100 [2022-01-10 06:37:09,664 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 1984 mSDsluCounter, 2361 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 957 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2018 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 2290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 957 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:09,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2018 Valid, 2433 Invalid, 2290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [957 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 06:37:09,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-10 06:37:09,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-01-10 06:37:09,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 74 states have internal predecessors, (74), 2 states have call successors, (2), 1 states have call predecessors, (2), 33 states have return successors, (34), 33 states have call predecessors, (34), 2 states have call successors, (34) [2022-01-10 06:37:09,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-01-10 06:37:09,671 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 197 [2022-01-10 06:37:09,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:09,671 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-01-10 06:37:09,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 2.044776119402985) internal successors, (137), 69 states have internal predecessors, (137), 34 states have call successors, (34), 1 states have call predecessors, (34), 32 states have return successors, (64), 32 states have call predecessors, (64), 34 states have call successors, (64) [2022-01-10 06:37:09,672 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-01-10 06:37:09,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-10 06:37:09,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:09,673 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:09,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:09,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:09,881 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:09,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1926951036, now seen corresponding path program 6 times [2022-01-10 06:37:09,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:09,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579717050] [2022-01-10 06:37:09,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:37:09,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:09,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:09,883 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:09,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:37:10,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2022-01-10 06:37:10,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:10,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 69 conjunts are in the unsatisfiable core [2022-01-10 06:37:10,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2022-01-10 06:37:10,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 0 proven. 2576 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-01-10 06:37:21,440 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:21,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579717050] [2022-01-10 06:37:21,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579717050] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:21,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:21,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 69] total 71 [2022-01-10 06:37:21,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817766947] [2022-01-10 06:37:21,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:21,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-10 06:37:21,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:21,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-10 06:37:21,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2022-01-10 06:37:21,442 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 71 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 71 states have internal predecessors, (141), 35 states have call successors, (35), 1 states have call predecessors, (35), 33 states have return successors, (66), 33 states have call predecessors, (66), 35 states have call successors, (66) [2022-01-10 06:37:22,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:22,511 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2022-01-10 06:37:22,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-10 06:37:22,512 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 71 states have internal predecessors, (141), 35 states have call successors, (35), 1 states have call predecessors, (35), 33 states have return successors, (66), 33 states have call predecessors, (66), 35 states have call successors, (66) Word has length 203 [2022-01-10 06:37:22,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:22,518 INFO L225 Difference]: With dead ends: 116 [2022-01-10 06:37:22,518 INFO L226 Difference]: Without dead ends: 112 [2022-01-10 06:37:22,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 313 SyntacticMatches, 22 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1427, Invalid=9285, Unknown=0, NotChecked=0, Total=10712 [2022-01-10 06:37:22,526 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1772 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 850 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 2590 SdHoareTripleChecker+Invalid, 2265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 850 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:22,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1807 Valid, 2590 Invalid, 2265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [850 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:37:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-10 06:37:22,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-01-10 06:37:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 76 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 34 states have return successors, (35), 34 states have call predecessors, (35), 2 states have call successors, (35) [2022-01-10 06:37:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-01-10 06:37:22,543 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 203 [2022-01-10 06:37:22,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:22,544 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-01-10 06:37:22,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 71 states have internal predecessors, (141), 35 states have call successors, (35), 1 states have call predecessors, (35), 33 states have return successors, (66), 33 states have call predecessors, (66), 35 states have call successors, (66) [2022-01-10 06:37:22,544 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-01-10 06:37:22,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-10 06:37:22,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:22,556 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:22,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:22,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:22,765 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:22,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2004857268, now seen corresponding path program 7 times [2022-01-10 06:37:22,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:22,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795530522] [2022-01-10 06:37:22,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:37:22,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:22,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:22,770 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:22,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:37:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:22,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 71 conjunts are in the unsatisfiable core [2022-01-10 06:37:22,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2022-01-10 06:37:23,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 0 proven. 2739 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-01-10 06:37:33,956 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:33,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795530522] [2022-01-10 06:37:33,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795530522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:33,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:33,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 71] total 73 [2022-01-10 06:37:33,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901567978] [2022-01-10 06:37:33,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:33,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-10 06:37:33,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:33,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-10 06:37:33,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=5044, Unknown=0, NotChecked=0, Total=5256 [2022-01-10 06:37:33,958 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 73 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 73 states have internal predecessors, (145), 36 states have call successors, (36), 1 states have call predecessors, (36), 34 states have return successors, (68), 34 states have call predecessors, (68), 36 states have call successors, (68) [2022-01-10 06:37:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:35,365 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2022-01-10 06:37:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-10 06:37:35,366 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 73 states have internal predecessors, (145), 36 states have call successors, (36), 1 states have call predecessors, (36), 34 states have return successors, (68), 34 states have call predecessors, (68), 36 states have call successors, (68) Word has length 209 [2022-01-10 06:37:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:35,366 INFO L225 Difference]: With dead ends: 119 [2022-01-10 06:37:35,367 INFO L226 Difference]: Without dead ends: 115 [2022-01-10 06:37:35,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 323 SyntacticMatches, 22 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1504, Invalid=9838, Unknown=0, NotChecked=0, Total=11342 [2022-01-10 06:37:35,369 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 2177 mSDsluCounter, 2605 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 1051 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2213 SdHoareTripleChecker+Valid, 2681 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1051 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:35,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2213 Valid, 2681 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1051 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 06:37:35,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-10 06:37:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-01-10 06:37:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 78 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 35 states have return successors, (36), 35 states have call predecessors, (36), 2 states have call successors, (36) [2022-01-10 06:37:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-01-10 06:37:35,375 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 209 [2022-01-10 06:37:35,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:35,376 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-01-10 06:37:35,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 73 states have internal predecessors, (145), 36 states have call successors, (36), 1 states have call predecessors, (36), 34 states have return successors, (68), 34 states have call predecessors, (68), 36 states have call successors, (68) [2022-01-10 06:37:35,376 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-01-10 06:37:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-10 06:37:35,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:35,377 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:35,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:35,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:35,589 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:35,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:35,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1846671548, now seen corresponding path program 8 times [2022-01-10 06:37:35,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:35,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506275675] [2022-01-10 06:37:35,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:37:35,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:35,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:35,591 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:35,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:37:35,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:37:35,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:35,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-10 06:37:35,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-01-10 06:37:36,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 0 proven. 2907 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2022-01-10 06:37:47,585 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:47,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506275675] [2022-01-10 06:37:47,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506275675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:47,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:47,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 73] total 75 [2022-01-10 06:37:47,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282027010] [2022-01-10 06:37:47,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:47,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-10 06:37:47,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:47,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-10 06:37:47,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2022-01-10 06:37:47,588 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 75 states, 73 states have (on average 2.041095890410959) internal successors, (149), 75 states have internal predecessors, (149), 37 states have call successors, (37), 1 states have call predecessors, (37), 35 states have return successors, (70), 35 states have call predecessors, (70), 37 states have call successors, (70) [2022-01-10 06:37:48,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:48,864 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2022-01-10 06:37:48,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-10 06:37:48,865 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 73 states have (on average 2.041095890410959) internal successors, (149), 75 states have internal predecessors, (149), 37 states have call successors, (37), 1 states have call predecessors, (37), 35 states have return successors, (70), 35 states have call predecessors, (70), 37 states have call successors, (70) Word has length 215 [2022-01-10 06:37:48,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:48,867 INFO L225 Difference]: With dead ends: 122 [2022-01-10 06:37:48,867 INFO L226 Difference]: Without dead ends: 118 [2022-01-10 06:37:48,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 332 SyntacticMatches, 23 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1583, Invalid=10407, Unknown=0, NotChecked=0, Total=11990 [2022-01-10 06:37:48,870 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 1084 mSDsluCounter, 2832 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 2910 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:48,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 2910 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:37:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-10 06:37:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-01-10 06:37:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 80 states have internal predecessors, (80), 2 states have call successors, (2), 1 states have call predecessors, (2), 36 states have return successors, (37), 36 states have call predecessors, (37), 2 states have call successors, (37) [2022-01-10 06:37:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-01-10 06:37:48,896 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 215 [2022-01-10 06:37:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:48,896 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-01-10 06:37:48,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 73 states have (on average 2.041095890410959) internal successors, (149), 75 states have internal predecessors, (149), 37 states have call successors, (37), 1 states have call predecessors, (37), 35 states have return successors, (70), 35 states have call predecessors, (70), 37 states have call successors, (70) [2022-01-10 06:37:48,897 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-01-10 06:37:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-10 06:37:48,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:48,898 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:48,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:49,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:49,102 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:49,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:49,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1082137972, now seen corresponding path program 9 times [2022-01-10 06:37:49,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:49,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763297477] [2022-01-10 06:37:49,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:37:49,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:49,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:49,109 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:49,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:37:49,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2022-01-10 06:37:49,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:49,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 75 conjunts are in the unsatisfiable core [2022-01-10 06:37:49,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2022-01-10 06:37:50,336 INFO L328 TraceCheckSpWp]: Computing backward predicates...