/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/seq-mthreaded/pals_STARTPALS_Triplicated.2.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:46:00,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:46:00,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:46:00,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:46:00,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:46:00,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:46:00,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:46:00,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:46:00,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:46:00,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:46:00,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:46:00,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:46:00,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:46:00,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:46:00,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:46:00,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:46:00,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:46:00,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:46:00,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:46:00,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:46:00,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:46:00,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:46:00,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:46:00,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:46:00,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 06:46:00,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:46:00,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:46:00,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:46:00,763 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 06:46:00,784 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:46:00,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:46:00,784 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:46:00,784 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:46:00,784 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:46:00,785 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:46:00,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:46:00,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:46:00,785 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:46:00,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:46:00,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:46:00,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:46:00,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:46:00,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:46:00,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:46:00,786 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:46:00,786 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:46:00,786 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:46:00,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:46:00,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:46:00,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:46:00,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:46:00,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:46:00,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:46:00,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:46:00,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:46:00,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:46:00,787 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:46:00,787 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:46:00,787 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:46:00,787 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:46:00,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:46:00,787 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:46:00,787 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:46:00,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:46:00,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:46:00,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:46:00,974 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:46:00,974 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:46:00,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_Triplicated.2.ufo.BOUNDED-10.pals.c [2022-01-10 06:46:01,020 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afc1595a2/d6f6fb4eb1de4ac0881030a2dded581c/FLAGa7722bd6f [2022-01-10 06:46:01,374 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:46:01,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_Triplicated.2.ufo.BOUNDED-10.pals.c [2022-01-10 06:46:01,394 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afc1595a2/d6f6fb4eb1de4ac0881030a2dded581c/FLAGa7722bd6f [2022-01-10 06:46:01,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afc1595a2/d6f6fb4eb1de4ac0881030a2dded581c [2022-01-10 06:46:01,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:46:01,786 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:46:01,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:46:01,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:46:01,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:46:01,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:46:01" (1/1) ... [2022-01-10 06:46:01,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@539c1043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:01, skipping insertion in model container [2022-01-10 06:46:01,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:46:01" (1/1) ... [2022-01-10 06:46:01,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:46:01,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:46:02,015 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_Triplicated.2.ufo.BOUNDED-10.pals.c[11857,11870] [2022-01-10 06:46:02,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:46:02,028 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:46:02,070 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_Triplicated.2.ufo.BOUNDED-10.pals.c[11857,11870] [2022-01-10 06:46:02,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:46:02,082 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:46:02,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:02 WrapperNode [2022-01-10 06:46:02,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:46:02,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:46:02,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:46:02,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:46:02,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:02" (1/1) ... [2022-01-10 06:46:02,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:02" (1/1) ... [2022-01-10 06:46:02,132 INFO L137 Inliner]: procedures = 27, calls = 46, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 386 [2022-01-10 06:46:02,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:46:02,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:46:02,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:46:02,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:46:02,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:02" (1/1) ... [2022-01-10 06:46:02,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:02" (1/1) ... [2022-01-10 06:46:02,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:02" (1/1) ... [2022-01-10 06:46:02,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:02" (1/1) ... [2022-01-10 06:46:02,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:02" (1/1) ... [2022-01-10 06:46:02,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:02" (1/1) ... [2022-01-10 06:46:02,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:02" (1/1) ... [2022-01-10 06:46:02,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:46:02,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:46:02,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:46:02,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:46:02,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:02" (1/1) ... [2022-01-10 06:46:02,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:46:02,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:46:02,192 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 06:46:02,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:46:02,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:46:02,235 INFO L130 BoogieDeclarations]: Found specification of procedure write_history_bool [2022-01-10 06:46:02,235 INFO L138 BoogieDeclarations]: Found implementation of procedure write_history_bool [2022-01-10 06:46:02,235 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-01-10 06:46:02,235 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-01-10 06:46:02,235 INFO L130 BoogieDeclarations]: Found specification of procedure read_history_int8 [2022-01-10 06:46:02,235 INFO L138 BoogieDeclarations]: Found implementation of procedure read_history_int8 [2022-01-10 06:46:02,235 INFO L130 BoogieDeclarations]: Found specification of procedure read_history_bool [2022-01-10 06:46:02,235 INFO L138 BoogieDeclarations]: Found implementation of procedure read_history_bool [2022-01-10 06:46:02,236 INFO L130 BoogieDeclarations]: Found specification of procedure add_history_type [2022-01-10 06:46:02,236 INFO L138 BoogieDeclarations]: Found implementation of procedure add_history_type [2022-01-10 06:46:02,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:46:02,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:46:02,227 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 06:46:02,348 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:46:02,349 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:46:02,715 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:46:02,721 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:46:02,721 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 06:46:02,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:46:02 BoogieIcfgContainer [2022-01-10 06:46:02,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:46:02,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:46:02,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:46:02,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:46:02,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:46:01" (1/3) ... [2022-01-10 06:46:02,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4a65cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:46:02, skipping insertion in model container [2022-01-10 06:46:02,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:02" (2/3) ... [2022-01-10 06:46:02,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4a65cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:46:02, skipping insertion in model container [2022-01-10 06:46:02,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:46:02" (3/3) ... [2022-01-10 06:46:02,739 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_Triplicated.2.ufo.BOUNDED-10.pals.c [2022-01-10 06:46:02,752 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:46:02,752 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:46:02,781 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:46:02,787 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 06:46:02,787 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:46:02,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 144 states have (on average 1.6041666666666667) internal successors, (231), 148 states have internal predecessors, (231), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-10 06:46:02,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 06:46:02,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:02,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:02,807 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:02,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:02,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1040694260, now seen corresponding path program 1 times [2022-01-10 06:46:02,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:02,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877043959] [2022-01-10 06:46:02,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:02,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:02,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:02,821 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 06:46:02,824 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 06:46:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:02,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:02,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:02,973 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 06:46:02,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:02,974 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:02,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877043959] [2022-01-10 06:46:02,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877043959] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:02,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:02,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:02,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151595410] [2022-01-10 06:46:02,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:02,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:02,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:03,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:03,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:03,009 INFO L87 Difference]: Start difference. First operand has 183 states, 144 states have (on average 1.6041666666666667) internal successors, (231), 148 states have internal predecessors, (231), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:03,132 INFO L93 Difference]: Finished difference Result 371 states and 633 transitions. [2022-01-10 06:46:03,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:03,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-10 06:46:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:03,150 INFO L225 Difference]: With dead ends: 371 [2022-01-10 06:46:03,150 INFO L226 Difference]: Without dead ends: 187 [2022-01-10 06:46:03,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:03,160 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 18 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:03,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 820 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:03,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-10 06:46:03,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2022-01-10 06:46:03,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 146 states have (on average 1.5273972602739727) internal successors, (223), 149 states have internal predecessors, (223), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-10 06:46:03,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 287 transitions. [2022-01-10 06:46:03,213 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 287 transitions. Word has length 15 [2022-01-10 06:46:03,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:03,214 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 287 transitions. [2022-01-10 06:46:03,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 287 transitions. [2022-01-10 06:46:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 06:46:03,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:03,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:03,225 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 06:46:03,424 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 06:46:03,424 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:03,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:03,425 INFO L85 PathProgramCache]: Analyzing trace with hash 899781387, now seen corresponding path program 1 times [2022-01-10 06:46:03,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:03,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312832969] [2022-01-10 06:46:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:03,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:03,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:03,427 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 06:46:03,428 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 06:46:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:03,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:03,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:03,525 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 06:46:03,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:03,525 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:03,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312832969] [2022-01-10 06:46:03,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312832969] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:03,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:03,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:03,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021979826] [2022-01-10 06:46:03,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:03,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:03,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:03,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:03,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:03,528 INFO L87 Difference]: Start difference. First operand 185 states and 287 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:03,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:03,568 INFO L93 Difference]: Finished difference Result 383 states and 597 transitions. [2022-01-10 06:46:03,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:03,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 06:46:03,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:03,571 INFO L225 Difference]: With dead ends: 383 [2022-01-10 06:46:03,572 INFO L226 Difference]: Without dead ends: 201 [2022-01-10 06:46:03,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:03,575 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 25 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:03,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 829 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:03,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-10 06:46:03,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2022-01-10 06:46:03,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 157 states have (on average 1.5095541401273886) internal successors, (237), 160 states have internal predecessors, (237), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-10 06:46:03,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 303 transitions. [2022-01-10 06:46:03,587 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 303 transitions. Word has length 16 [2022-01-10 06:46:03,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:03,587 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 303 transitions. [2022-01-10 06:46:03,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:03,587 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 303 transitions. [2022-01-10 06:46:03,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 06:46:03,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:03,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:03,594 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 06:46:03,791 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 06:46:03,793 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:03,793 INFO L85 PathProgramCache]: Analyzing trace with hash 977089285, now seen corresponding path program 1 times [2022-01-10 06:46:03,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:03,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435643233] [2022-01-10 06:46:03,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:03,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:03,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:03,795 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 06:46:03,797 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 06:46:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:03,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:03,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:03,898 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 06:46:03,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:03,898 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:03,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435643233] [2022-01-10 06:46:03,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435643233] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:03,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:03,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:03,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127555229] [2022-01-10 06:46:03,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:03,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:03,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:03,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:03,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:03,903 INFO L87 Difference]: Start difference. First operand 198 states and 303 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:46:03,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:03,922 INFO L93 Difference]: Finished difference Result 415 states and 643 transitions. [2022-01-10 06:46:03,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:03,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-10 06:46:03,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:03,926 INFO L225 Difference]: With dead ends: 415 [2022-01-10 06:46:03,926 INFO L226 Difference]: Without dead ends: 227 [2022-01-10 06:46:03,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:03,928 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 22 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:03,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 560 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:03,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-10 06:46:03,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 200. [2022-01-10 06:46:03,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 159 states have (on average 1.5031446540880504) internal successors, (239), 162 states have internal predecessors, (239), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-10 06:46:03,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 305 transitions. [2022-01-10 06:46:03,942 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 305 transitions. Word has length 23 [2022-01-10 06:46:03,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:03,942 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 305 transitions. [2022-01-10 06:46:03,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:46:03,942 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 305 transitions. [2022-01-10 06:46:03,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 06:46:03,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:03,943 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:03,949 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 06:46:04,147 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 06:46:04,147 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:04,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:04,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1386108362, now seen corresponding path program 1 times [2022-01-10 06:46:04,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:04,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741826433] [2022-01-10 06:46:04,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:04,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:04,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:04,150 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 06:46:04,150 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 06:46:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:04,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:04,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:04,290 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 06:46:04,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:04,291 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:04,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741826433] [2022-01-10 06:46:04,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741826433] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:04,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:04,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:04,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768484917] [2022-01-10 06:46:04,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:04,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:04,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:04,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:04,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:04,316 INFO L87 Difference]: Start difference. First operand 200 states and 305 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:46:04,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:04,352 INFO L93 Difference]: Finished difference Result 454 states and 708 transitions. [2022-01-10 06:46:04,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:04,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-01-10 06:46:04,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:04,355 INFO L225 Difference]: With dead ends: 454 [2022-01-10 06:46:04,355 INFO L226 Difference]: Without dead ends: 305 [2022-01-10 06:46:04,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:04,360 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 130 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:04,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 864 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-01-10 06:46:04,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 200. [2022-01-10 06:46:04,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 159 states have (on average 1.4779874213836477) internal successors, (235), 162 states have internal predecessors, (235), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-10 06:46:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 301 transitions. [2022-01-10 06:46:04,381 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 301 transitions. Word has length 31 [2022-01-10 06:46:04,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:04,382 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 301 transitions. [2022-01-10 06:46:04,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:46:04,382 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 301 transitions. [2022-01-10 06:46:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 06:46:04,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:04,386 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:04,394 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 06:46:04,591 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 06:46:04,592 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:04,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:04,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1610752054, now seen corresponding path program 1 times [2022-01-10 06:46:04,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:04,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081948100] [2022-01-10 06:46:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:04,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:04,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:04,594 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 06:46:04,596 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 06:46:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:04,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:46:04,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:46:04,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:04,730 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:04,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081948100] [2022-01-10 06:46:04,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081948100] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:04,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:04,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:46:04,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789403516] [2022-01-10 06:46:04,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:04,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:04,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:04,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:04,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:04,732 INFO L87 Difference]: Start difference. First operand 200 states and 301 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:46:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:04,756 INFO L93 Difference]: Finished difference Result 390 states and 591 transitions. [2022-01-10 06:46:04,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:04,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-01-10 06:46:04,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:04,760 INFO L225 Difference]: With dead ends: 390 [2022-01-10 06:46:04,760 INFO L226 Difference]: Without dead ends: 202 [2022-01-10 06:46:04,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 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 06:46:04,761 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 0 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:04,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1096 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-10 06:46:04,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-01-10 06:46:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 159 states have (on average 1.471698113207547) internal successors, (234), 162 states have internal predecessors, (234), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-10 06:46:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 300 transitions. [2022-01-10 06:46:04,772 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 300 transitions. Word has length 32 [2022-01-10 06:46:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:04,772 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 300 transitions. [2022-01-10 06:46:04,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:46:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 300 transitions. [2022-01-10 06:46:04,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 06:46:04,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:04,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:04,782 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 06:46:04,979 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 06:46:04,980 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:04,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:04,980 INFO L85 PathProgramCache]: Analyzing trace with hash 839076892, now seen corresponding path program 1 times [2022-01-10 06:46:04,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:04,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739045964] [2022-01-10 06:46:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:04,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:04,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:04,982 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 06:46:04,982 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 06:46:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:05,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:05,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:46:05,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:46:05,176 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:05,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739045964] [2022-01-10 06:46:05,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739045964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:05,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:05,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:46:05,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352672584] [2022-01-10 06:46:05,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:05,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:46:05,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:05,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:46:05,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:46:05,177 INFO L87 Difference]: Start difference. First operand 200 states and 300 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:46:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:05,215 INFO L93 Difference]: Finished difference Result 448 states and 687 transitions. [2022-01-10 06:46:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:05,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2022-01-10 06:46:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:05,217 INFO L225 Difference]: With dead ends: 448 [2022-01-10 06:46:05,217 INFO L226 Difference]: Without dead ends: 259 [2022-01-10 06:46:05,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:46:05,218 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 84 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:05,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1147 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:05,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-10 06:46:05,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 253. [2022-01-10 06:46:05,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 202 states have (on average 1.4504950495049505) internal successors, (293), 205 states have internal predecessors, (293), 43 states have call successors, (43), 7 states have call predecessors, (43), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-10 06:46:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 379 transitions. [2022-01-10 06:46:05,225 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 379 transitions. Word has length 35 [2022-01-10 06:46:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:05,225 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 379 transitions. [2022-01-10 06:46:05,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:46:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 379 transitions. [2022-01-10 06:46:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 06:46:05,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:05,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:05,234 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 06:46:05,435 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 06:46:05,435 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:05,436 INFO L85 PathProgramCache]: Analyzing trace with hash 346203964, now seen corresponding path program 2 times [2022-01-10 06:46:05,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:05,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214551473] [2022-01-10 06:46:05,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:46:05,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:05,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:05,437 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 06:46:05,438 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 06:46:05,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 06:46:05,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:46:05,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:05,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 06:46:05,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:05,573 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:05,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214551473] [2022-01-10 06:46:05,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214551473] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:05,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:05,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:05,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049407581] [2022-01-10 06:46:05,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:05,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:05,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:05,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:05,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:05,574 INFO L87 Difference]: Start difference. First operand 253 states and 379 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:46:05,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:05,607 INFO L93 Difference]: Finished difference Result 486 states and 748 transitions. [2022-01-10 06:46:05,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:05,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2022-01-10 06:46:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:05,609 INFO L225 Difference]: With dead ends: 486 [2022-01-10 06:46:05,609 INFO L226 Difference]: Without dead ends: 262 [2022-01-10 06:46:05,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:05,611 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 19 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:05,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 807 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:05,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-10 06:46:05,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2022-01-10 06:46:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 208 states have (on average 1.4471153846153846) internal successors, (301), 211 states have internal predecessors, (301), 43 states have call successors, (43), 8 states have call predecessors, (43), 8 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-10 06:46:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 387 transitions. [2022-01-10 06:46:05,623 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 387 transitions. Word has length 57 [2022-01-10 06:46:05,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:05,623 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 387 transitions. [2022-01-10 06:46:05,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:46:05,623 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 387 transitions. [2022-01-10 06:46:05,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 06:46:05,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:05,624 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:05,635 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 06:46:05,833 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 06:46:05,833 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:05,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:05,834 INFO L85 PathProgramCache]: Analyzing trace with hash -562676277, now seen corresponding path program 1 times [2022-01-10 06:46:05,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:05,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268785533] [2022-01-10 06:46:05,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:05,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:05,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:05,835 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 06:46:05,836 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 06:46:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:05,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:05,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 06:46:05,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:05,989 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:05,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268785533] [2022-01-10 06:46:05,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268785533] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:05,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:05,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:05,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118578339] [2022-01-10 06:46:05,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:05,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:05,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:05,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:05,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:05,991 INFO L87 Difference]: Start difference. First operand 260 states and 387 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:46:06,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:06,023 INFO L93 Difference]: Finished difference Result 530 states and 800 transitions. [2022-01-10 06:46:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:06,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2022-01-10 06:46:06,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:06,025 INFO L225 Difference]: With dead ends: 530 [2022-01-10 06:46:06,025 INFO L226 Difference]: Without dead ends: 299 [2022-01-10 06:46:06,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:06,026 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 24 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:06,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 821 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:06,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-10 06:46:06,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 296. [2022-01-10 06:46:06,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 240 states have (on average 1.4083333333333334) internal successors, (338), 243 states have internal predecessors, (338), 46 states have call successors, (46), 9 states have call predecessors, (46), 9 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-01-10 06:46:06,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 430 transitions. [2022-01-10 06:46:06,037 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 430 transitions. Word has length 57 [2022-01-10 06:46:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:06,039 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 430 transitions. [2022-01-10 06:46:06,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:46:06,039 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 430 transitions. [2022-01-10 06:46:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 06:46:06,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:06,040 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:06,050 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 06:46:06,247 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 06:46:06,247 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:06,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:06,248 INFO L85 PathProgramCache]: Analyzing trace with hash 747834355, now seen corresponding path program 1 times [2022-01-10 06:46:06,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:06,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762687022] [2022-01-10 06:46:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:06,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:06,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:06,249 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 06:46:06,250 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 06:46:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:06,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:46:06,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 06:46:06,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:06,408 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:06,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762687022] [2022-01-10 06:46:06,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762687022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:06,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:06,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:46:06,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491819717] [2022-01-10 06:46:06,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:06,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:06,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:06,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:06,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:06,410 INFO L87 Difference]: Start difference. First operand 296 states and 430 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 06:46:06,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:06,426 INFO L93 Difference]: Finished difference Result 541 states and 799 transitions. [2022-01-10 06:46:06,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:06,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 75 [2022-01-10 06:46:06,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:06,429 INFO L225 Difference]: With dead ends: 541 [2022-01-10 06:46:06,429 INFO L226 Difference]: Without dead ends: 298 [2022-01-10 06:46:06,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 71 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 06:46:06,433 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 0 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:06,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1095 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:06,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-01-10 06:46:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 296. [2022-01-10 06:46:06,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 240 states have (on average 1.3958333333333333) internal successors, (335), 243 states have internal predecessors, (335), 46 states have call successors, (46), 9 states have call predecessors, (46), 9 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-01-10 06:46:06,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 427 transitions. [2022-01-10 06:46:06,442 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 427 transitions. Word has length 75 [2022-01-10 06:46:06,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:06,443 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 427 transitions. [2022-01-10 06:46:06,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 06:46:06,443 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 427 transitions. [2022-01-10 06:46:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-10 06:46:06,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:06,443 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:06,451 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 06:46:06,650 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 06:46:06,650 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:06,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:06,650 INFO L85 PathProgramCache]: Analyzing trace with hash -951154883, now seen corresponding path program 1 times [2022-01-10 06:46:06,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:06,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793915173] [2022-01-10 06:46:06,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:06,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:06,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:06,652 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 06:46:06,654 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 06:46:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:06,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:06,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-01-10 06:46:06,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:06,843 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:06,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793915173] [2022-01-10 06:46:06,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793915173] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:06,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:06,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:06,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747742386] [2022-01-10 06:46:06,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:06,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:06,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:06,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:06,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:06,845 INFO L87 Difference]: Start difference. First operand 296 states and 427 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 06:46:06,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:06,875 INFO L93 Difference]: Finished difference Result 578 states and 855 transitions. [2022-01-10 06:46:06,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:06,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 104 [2022-01-10 06:46:06,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:06,877 INFO L225 Difference]: With dead ends: 578 [2022-01-10 06:46:06,877 INFO L226 Difference]: Without dead ends: 340 [2022-01-10 06:46:06,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:06,879 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 25 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:06,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 821 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:06,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-01-10 06:46:06,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 337. [2022-01-10 06:46:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 277 states have (on average 1.3610108303249098) internal successors, (377), 280 states have internal predecessors, (377), 49 states have call successors, (49), 10 states have call predecessors, (49), 10 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-01-10 06:46:06,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 475 transitions. [2022-01-10 06:46:06,887 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 475 transitions. Word has length 104 [2022-01-10 06:46:06,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:06,887 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 475 transitions. [2022-01-10 06:46:06,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 06:46:06,887 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 475 transitions. [2022-01-10 06:46:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-10 06:46:06,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:06,888 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:06,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:07,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:07,095 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:07,095 INFO L85 PathProgramCache]: Analyzing trace with hash 598920618, now seen corresponding path program 1 times [2022-01-10 06:46:07,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:07,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193650628] [2022-01-10 06:46:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:07,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:07,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:07,097 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:07,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:46:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:07,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:07,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-01-10 06:46:07,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:07,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:07,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193650628] [2022-01-10 06:46:07,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193650628] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:07,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:07,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:07,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832543465] [2022-01-10 06:46:07,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:07,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:07,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:07,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:07,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:07,277 INFO L87 Difference]: Start difference. First operand 337 states and 475 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 06:46:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:07,305 INFO L93 Difference]: Finished difference Result 604 states and 875 transitions. [2022-01-10 06:46:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:07,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 105 [2022-01-10 06:46:07,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:07,307 INFO L225 Difference]: With dead ends: 604 [2022-01-10 06:46:07,307 INFO L226 Difference]: Without dead ends: 331 [2022-01-10 06:46:07,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:07,308 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 15 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:07,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 780 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:07,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-01-10 06:46:07,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2022-01-10 06:46:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 272 states have (on average 1.3419117647058822) internal successors, (365), 275 states have internal predecessors, (365), 48 states have call successors, (48), 10 states have call predecessors, (48), 10 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-01-10 06:46:07,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 461 transitions. [2022-01-10 06:46:07,316 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 461 transitions. Word has length 105 [2022-01-10 06:46:07,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:07,317 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 461 transitions. [2022-01-10 06:46:07,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 06:46:07,317 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 461 transitions. [2022-01-10 06:46:07,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 06:46:07,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:07,318 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:07,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:07,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:07,525 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:07,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:07,525 INFO L85 PathProgramCache]: Analyzing trace with hash -590102049, now seen corresponding path program 1 times [2022-01-10 06:46:07,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:07,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923994113] [2022-01-10 06:46:07,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:07,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:07,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:07,526 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:07,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:46:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:07,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:46:07,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-01-10 06:46:07,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:07,744 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:07,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923994113] [2022-01-10 06:46:07,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923994113] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:07,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:07,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:46:07,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122645196] [2022-01-10 06:46:07,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:07,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:07,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:07,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:07,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:07,745 INFO L87 Difference]: Start difference. First operand 331 states and 461 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:46:07,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:07,760 INFO L93 Difference]: Finished difference Result 579 states and 824 transitions. [2022-01-10 06:46:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:07,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 124 [2022-01-10 06:46:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:07,762 INFO L225 Difference]: With dead ends: 579 [2022-01-10 06:46:07,762 INFO L226 Difference]: Without dead ends: 333 [2022-01-10 06:46:07,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 120 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 06:46:07,763 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 0 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:07,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1079 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:07,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-10 06:46:07,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 331. [2022-01-10 06:46:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 272 states have (on average 1.3308823529411764) internal successors, (362), 275 states have internal predecessors, (362), 48 states have call successors, (48), 10 states have call predecessors, (48), 10 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-01-10 06:46:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 458 transitions. [2022-01-10 06:46:07,771 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 458 transitions. Word has length 124 [2022-01-10 06:46:07,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:07,771 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 458 transitions. [2022-01-10 06:46:07,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:46:07,771 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 458 transitions. [2022-01-10 06:46:07,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 06:46:07,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:07,774 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 7, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:07,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:07,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:07,984 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash -717601583, now seen corresponding path program 1 times [2022-01-10 06:46:07,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:07,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653754034] [2022-01-10 06:46:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:07,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:07,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:07,986 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:07,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:46:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:08,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:08,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2022-01-10 06:46:08,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:08,253 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:08,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653754034] [2022-01-10 06:46:08,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653754034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:08,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:08,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:08,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808516537] [2022-01-10 06:46:08,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:08,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:08,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:08,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:08,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:08,254 INFO L87 Difference]: Start difference. First operand 331 states and 458 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:46:08,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:08,298 INFO L93 Difference]: Finished difference Result 542 states and 784 transitions. [2022-01-10 06:46:08,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:08,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 157 [2022-01-10 06:46:08,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:08,299 INFO L225 Difference]: With dead ends: 542 [2022-01-10 06:46:08,300 INFO L226 Difference]: Without dead ends: 329 [2022-01-10 06:46:08,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:08,302 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 13 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:08,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 748 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:08,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-10 06:46:08,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2022-01-10 06:46:08,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 271 states have (on average 1.3284132841328413) internal successors, (360), 274 states have internal predecessors, (360), 47 states have call successors, (47), 10 states have call predecessors, (47), 10 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-01-10 06:46:08,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 454 transitions. [2022-01-10 06:46:08,310 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 454 transitions. Word has length 157 [2022-01-10 06:46:08,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:08,310 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 454 transitions. [2022-01-10 06:46:08,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:46:08,311 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 454 transitions. [2022-01-10 06:46:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-10 06:46:08,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:08,312 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:08,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:08,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:08,518 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:08,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:08,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1055792649, now seen corresponding path program 1 times [2022-01-10 06:46:08,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:08,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483416930] [2022-01-10 06:46:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:08,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:08,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:08,520 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:08,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:46:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:08,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:08,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-01-10 06:46:08,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:08,817 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:08,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483416930] [2022-01-10 06:46:08,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483416930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:08,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:08,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:08,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068049513] [2022-01-10 06:46:08,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:08,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:08,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:08,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:08,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:08,818 INFO L87 Difference]: Start difference. First operand 329 states and 454 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:46:08,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:08,857 INFO L93 Difference]: Finished difference Result 482 states and 680 transitions. [2022-01-10 06:46:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:08,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 172 [2022-01-10 06:46:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:08,859 INFO L225 Difference]: With dead ends: 482 [2022-01-10 06:46:08,859 INFO L226 Difference]: Without dead ends: 312 [2022-01-10 06:46:08,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:08,860 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 35 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:08,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 729 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:08,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-10 06:46:08,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-01-10 06:46:08,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 257 states have (on average 1.3190661478599222) internal successors, (339), 260 states have internal predecessors, (339), 44 states have call successors, (44), 10 states have call predecessors, (44), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-01-10 06:46:08,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 427 transitions. [2022-01-10 06:46:08,866 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 427 transitions. Word has length 172 [2022-01-10 06:46:08,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:08,866 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 427 transitions. [2022-01-10 06:46:08,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:46:08,867 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 427 transitions. [2022-01-10 06:46:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-10 06:46:08,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:08,868 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:08,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:09,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:09,075 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:09,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:09,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1214123782, now seen corresponding path program 1 times [2022-01-10 06:46:09,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:09,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253351901] [2022-01-10 06:46:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:09,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:09,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:09,077 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:09,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:46:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:09,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:09,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2022-01-10 06:46:09,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:09,362 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:09,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253351901] [2022-01-10 06:46:09,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253351901] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:09,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:09,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:09,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851310656] [2022-01-10 06:46:09,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:09,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:09,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:09,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:09,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:09,364 INFO L87 Difference]: Start difference. First operand 312 states and 427 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:46:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:09,399 INFO L93 Difference]: Finished difference Result 465 states and 653 transitions. [2022-01-10 06:46:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:09,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 174 [2022-01-10 06:46:09,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:09,402 INFO L225 Difference]: With dead ends: 465 [2022-01-10 06:46:09,402 INFO L226 Difference]: Without dead ends: 293 [2022-01-10 06:46:09,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:09,404 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 30 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:09,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 733 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:09,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-10 06:46:09,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2022-01-10 06:46:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 241 states have (on average 1.3112033195020747) internal successors, (316), 244 states have internal predecessors, (316), 41 states have call successors, (41), 10 states have call predecessors, (41), 10 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-10 06:46:09,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 398 transitions. [2022-01-10 06:46:09,410 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 398 transitions. Word has length 174 [2022-01-10 06:46:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:09,411 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 398 transitions. [2022-01-10 06:46:09,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:46:09,411 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 398 transitions. [2022-01-10 06:46:09,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-10 06:46:09,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:09,412 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:09,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:09,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:09,619 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:09,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:09,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1416861431, now seen corresponding path program 1 times [2022-01-10 06:46:09,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:09,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878592107] [2022-01-10 06:46:09,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:09,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:09,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:09,621 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:09,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:46:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:09,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:46:09,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2022-01-10 06:46:09,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:09,896 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:09,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878592107] [2022-01-10 06:46:09,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878592107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:09,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:09,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:46:09,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859816092] [2022-01-10 06:46:09,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:09,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:09,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:09,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:09,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:09,897 INFO L87 Difference]: Start difference. First operand 293 states and 398 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-10 06:46:09,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:09,939 INFO L93 Difference]: Finished difference Result 445 states and 623 transitions. [2022-01-10 06:46:09,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:09,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 175 [2022-01-10 06:46:09,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:09,942 INFO L225 Difference]: With dead ends: 445 [2022-01-10 06:46:09,942 INFO L226 Difference]: Without dead ends: 293 [2022-01-10 06:46:09,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 171 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 06:46:09,943 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 0 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:09,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1057 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:09,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-10 06:46:09,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2022-01-10 06:46:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 241 states have (on average 1.2863070539419088) internal successors, (310), 244 states have internal predecessors, (310), 41 states have call successors, (41), 10 states have call predecessors, (41), 10 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-10 06:46:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 392 transitions. [2022-01-10 06:46:09,952 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 392 transitions. Word has length 175 [2022-01-10 06:46:09,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:09,953 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 392 transitions. [2022-01-10 06:46:09,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-10 06:46:09,954 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 392 transitions. [2022-01-10 06:46:09,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-10 06:46:09,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:09,955 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:09,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:10,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:10,162 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:10,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:10,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1467403298, now seen corresponding path program 1 times [2022-01-10 06:46:10,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:10,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843417701] [2022-01-10 06:46:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:10,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:10,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:10,164 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:10,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:46:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:10,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:10,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 138 proven. 14 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-01-10 06:46:10,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-01-10 06:46:10,759 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:10,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843417701] [2022-01-10 06:46:10,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843417701] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:46:10,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:46:10,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-01-10 06:46:10,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336693740] [2022-01-10 06:46:10,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:10,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:10,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:10,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:10,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:10,760 INFO L87 Difference]: Start difference. First operand 293 states and 392 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 06:46:10,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:10,786 INFO L93 Difference]: Finished difference Result 466 states and 645 transitions. [2022-01-10 06:46:10,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:10,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 182 [2022-01-10 06:46:10,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:10,788 INFO L225 Difference]: With dead ends: 466 [2022-01-10 06:46:10,788 INFO L226 Difference]: Without dead ends: 272 [2022-01-10 06:46:10,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:10,789 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 22 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:10,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 732 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:10,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-10 06:46:10,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-01-10 06:46:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 223 states have (on average 1.2780269058295963) internal successors, (285), 226 states have internal predecessors, (285), 38 states have call successors, (38), 10 states have call predecessors, (38), 10 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-10 06:46:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 361 transitions. [2022-01-10 06:46:10,795 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 361 transitions. Word has length 182 [2022-01-10 06:46:10,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:10,795 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 361 transitions. [2022-01-10 06:46:10,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 06:46:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 361 transitions. [2022-01-10 06:46:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-10 06:46:10,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:10,796 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:10,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:11,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:11,003 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:11,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:11,004 INFO L85 PathProgramCache]: Analyzing trace with hash 347787473, now seen corresponding path program 1 times [2022-01-10 06:46:11,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:11,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022064648] [2022-01-10 06:46:11,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:11,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:11,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:11,005 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:11,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 06:46:11,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:11,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:11,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-01-10 06:46:11,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:11,340 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:11,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022064648] [2022-01-10 06:46:11,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022064648] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:11,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:11,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:11,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687130114] [2022-01-10 06:46:11,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:11,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:11,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:11,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:11,341 INFO L87 Difference]: Start difference. First operand 272 states and 361 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-10 06:46:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:11,366 INFO L93 Difference]: Finished difference Result 423 states and 587 transitions. [2022-01-10 06:46:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:11,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 206 [2022-01-10 06:46:11,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:11,367 INFO L225 Difference]: With dead ends: 423 [2022-01-10 06:46:11,368 INFO L226 Difference]: Without dead ends: 278 [2022-01-10 06:46:11,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:11,368 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 6 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:11,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 773 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-10 06:46:11,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2022-01-10 06:46:11,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 226 states have (on average 1.2743362831858407) internal successors, (288), 229 states have internal predecessors, (288), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-10 06:46:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 364 transitions. [2022-01-10 06:46:11,374 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 364 transitions. Word has length 206 [2022-01-10 06:46:11,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:11,375 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 364 transitions. [2022-01-10 06:46:11,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-10 06:46:11,376 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 364 transitions. [2022-01-10 06:46:11,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-10 06:46:11,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:11,377 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:11,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-01-10 06:46:11,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:11,584 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:11,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:11,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1054391106, now seen corresponding path program 1 times [2022-01-10 06:46:11,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:11,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764900337] [2022-01-10 06:46:11,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:11,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:11,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:11,586 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:11,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 06:46:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:11,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:11,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-01-10 06:46:11,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:11,881 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:11,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764900337] [2022-01-10 06:46:11,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764900337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:11,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:11,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:11,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090697679] [2022-01-10 06:46:11,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:11,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:11,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:11,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:11,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:11,883 INFO L87 Difference]: Start difference. First operand 276 states and 364 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-01-10 06:46:11,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:11,902 INFO L93 Difference]: Finished difference Result 432 states and 594 transitions. [2022-01-10 06:46:11,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:11,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 215 [2022-01-10 06:46:11,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:11,904 INFO L225 Difference]: With dead ends: 432 [2022-01-10 06:46:11,904 INFO L226 Difference]: Without dead ends: 283 [2022-01-10 06:46:11,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:11,904 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 7 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:11,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 778 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:11,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-10 06:46:11,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2022-01-10 06:46:11,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 230 states have (on average 1.2695652173913043) internal successors, (292), 233 states have internal predecessors, (292), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-10 06:46:11,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 368 transitions. [2022-01-10 06:46:11,910 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 368 transitions. Word has length 215 [2022-01-10 06:46:11,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:11,910 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 368 transitions. [2022-01-10 06:46:11,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-01-10 06:46:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 368 transitions. [2022-01-10 06:46:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-10 06:46:11,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:11,912 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:11,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:12,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:12,119 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:12,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1477420628, now seen corresponding path program 1 times [2022-01-10 06:46:12,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:12,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347866648] [2022-01-10 06:46:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:12,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:12,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:12,121 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:12,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:46:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:12,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:12,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-01-10 06:46:12,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:12,465 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:12,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347866648] [2022-01-10 06:46:12,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347866648] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:12,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:12,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:12,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922907272] [2022-01-10 06:46:12,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:12,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:12,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:12,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:12,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:12,466 INFO L87 Difference]: Start difference. First operand 281 states and 368 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-01-10 06:46:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:12,490 INFO L93 Difference]: Finished difference Result 434 states and 592 transitions. [2022-01-10 06:46:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:12,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 225 [2022-01-10 06:46:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:12,491 INFO L225 Difference]: With dead ends: 434 [2022-01-10 06:46:12,491 INFO L226 Difference]: Without dead ends: 280 [2022-01-10 06:46:12,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:12,492 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 7 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:12,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 764 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:12,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-10 06:46:12,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-01-10 06:46:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 230 states have (on average 1.2565217391304349) internal successors, (289), 232 states have internal predecessors, (289), 37 states have call successors, (37), 12 states have call predecessors, (37), 12 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-01-10 06:46:12,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 363 transitions. [2022-01-10 06:46:12,501 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 363 transitions. Word has length 225 [2022-01-10 06:46:12,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:12,501 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 363 transitions. [2022-01-10 06:46:12,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-01-10 06:46:12,502 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 363 transitions. [2022-01-10 06:46:12,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-10 06:46:12,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:12,503 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:12,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:12,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:12,711 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:12,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:12,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1684487284, now seen corresponding path program 1 times [2022-01-10 06:46:12,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:12,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198360037] [2022-01-10 06:46:12,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:12,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:12,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:12,713 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:12,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:46:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:12,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:12,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2022-01-10 06:46:13,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:13,060 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:13,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198360037] [2022-01-10 06:46:13,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198360037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:13,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:13,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:13,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305198213] [2022-01-10 06:46:13,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:13,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:13,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:13,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:13,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:13,061 INFO L87 Difference]: Start difference. First operand 280 states and 363 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-01-10 06:46:13,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:13,071 INFO L93 Difference]: Finished difference Result 475 states and 650 transitions. [2022-01-10 06:46:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:13,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 235 [2022-01-10 06:46:13,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:13,081 INFO L225 Difference]: With dead ends: 475 [2022-01-10 06:46:13,081 INFO L226 Difference]: Without dead ends: 322 [2022-01-10 06:46:13,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:13,081 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 128 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:13,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 501 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:13,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-01-10 06:46:13,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 279. [2022-01-10 06:46:13,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 230 states have (on average 1.2521739130434784) internal successors, (288), 231 states have internal predecessors, (288), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-10 06:46:13,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 360 transitions. [2022-01-10 06:46:13,092 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 360 transitions. Word has length 235 [2022-01-10 06:46:13,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:13,092 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 360 transitions. [2022-01-10 06:46:13,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-01-10 06:46:13,092 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 360 transitions. [2022-01-10 06:46:13,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-01-10 06:46:13,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:13,093 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:13,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:13,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:13,301 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:13,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:13,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1937286894, now seen corresponding path program 1 times [2022-01-10 06:46:13,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:13,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632765525] [2022-01-10 06:46:13,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:13,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:13,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:13,302 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:13,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:46:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:13,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:46:13,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2022-01-10 06:46:13,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:13,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:13,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632765525] [2022-01-10 06:46:13,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632765525] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:13,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:13,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:13,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426891534] [2022-01-10 06:46:13,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:13,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:13,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:13,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:13,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:13,861 INFO L87 Difference]: Start difference. First operand 279 states and 360 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-01-10 06:46:14,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:14,032 INFO L93 Difference]: Finished difference Result 629 states and 845 transitions. [2022-01-10 06:46:14,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:46:14,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 236 [2022-01-10 06:46:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:14,034 INFO L225 Difference]: With dead ends: 629 [2022-01-10 06:46:14,034 INFO L226 Difference]: Without dead ends: 477 [2022-01-10 06:46:14,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:46:14,035 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 574 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:14,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 803 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:14,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-10 06:46:14,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 414. [2022-01-10 06:46:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 339 states have (on average 1.294985250737463) internal successors, (439), 341 states have internal predecessors, (439), 54 states have call successors, (54), 20 states have call predecessors, (54), 20 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2022-01-10 06:46:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 547 transitions. [2022-01-10 06:46:14,043 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 547 transitions. Word has length 236 [2022-01-10 06:46:14,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:14,044 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 547 transitions. [2022-01-10 06:46:14,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-01-10 06:46:14,044 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 547 transitions. [2022-01-10 06:46:14,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-10 06:46:14,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:14,045 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:14,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:14,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:14,253 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:14,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:14,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1634448199, now seen corresponding path program 1 times [2022-01-10 06:46:14,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:14,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639484109] [2022-01-10 06:46:14,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:14,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:14,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:14,255 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:14,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:46:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:14,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:14,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2022-01-10 06:46:14,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:14,708 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:14,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639484109] [2022-01-10 06:46:14,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639484109] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:14,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:14,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:14,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147440988] [2022-01-10 06:46:14,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:14,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:14,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:14,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:14,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:14,709 INFO L87 Difference]: Start difference. First operand 414 states and 547 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 06:46:14,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:14,741 INFO L93 Difference]: Finished difference Result 897 states and 1232 transitions. [2022-01-10 06:46:14,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:14,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 265 [2022-01-10 06:46:14,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:14,746 INFO L225 Difference]: With dead ends: 897 [2022-01-10 06:46:14,747 INFO L226 Difference]: Without dead ends: 668 [2022-01-10 06:46:14,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:14,750 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 163 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:14,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 548 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:14,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-01-10 06:46:14,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 582. [2022-01-10 06:46:14,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 478 states have (on average 1.3242677824267783) internal successors, (633), 482 states have internal predecessors, (633), 74 states have call successors, (74), 29 states have call predecessors, (74), 29 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2022-01-10 06:46:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 781 transitions. [2022-01-10 06:46:14,764 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 781 transitions. Word has length 265 [2022-01-10 06:46:14,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:14,764 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 781 transitions. [2022-01-10 06:46:14,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 06:46:14,764 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 781 transitions. [2022-01-10 06:46:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-01-10 06:46:14,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:14,765 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:14,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:14,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:14,973 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:14,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1733084103, now seen corresponding path program 1 times [2022-01-10 06:46:14,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:14,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257317569] [2022-01-10 06:46:14,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:14,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:14,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:14,975 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:14,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 06:46:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:15,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:15,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-01-10 06:46:15,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:15,394 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:15,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257317569] [2022-01-10 06:46:15,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257317569] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:15,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:15,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:15,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423520229] [2022-01-10 06:46:15,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:15,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:15,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:15,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:15,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:15,395 INFO L87 Difference]: Start difference. First operand 582 states and 781 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 06:46:15,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:15,419 INFO L93 Difference]: Finished difference Result 1314 states and 1824 transitions. [2022-01-10 06:46:15,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:15,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 266 [2022-01-10 06:46:15,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:15,423 INFO L225 Difference]: With dead ends: 1314 [2022-01-10 06:46:15,423 INFO L226 Difference]: Without dead ends: 958 [2022-01-10 06:46:15,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:15,425 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 169 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:15,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 568 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:15,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-01-10 06:46:15,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 704. [2022-01-10 06:46:15,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 588 states have (on average 1.3282312925170068) internal successors, (781), 594 states have internal predecessors, (781), 80 states have call successors, (80), 35 states have call predecessors, (80), 35 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-10 06:46:15,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 941 transitions. [2022-01-10 06:46:15,441 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 941 transitions. Word has length 266 [2022-01-10 06:46:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:15,442 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 941 transitions. [2022-01-10 06:46:15,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 06:46:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 941 transitions. [2022-01-10 06:46:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-10 06:46:15,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:15,443 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:15,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-01-10 06:46:15,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:15,651 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:15,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:15,651 INFO L85 PathProgramCache]: Analyzing trace with hash 2100471702, now seen corresponding path program 1 times [2022-01-10 06:46:15,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:15,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345272372] [2022-01-10 06:46:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:15,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:15,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:15,653 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:15,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 06:46:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:15,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:15,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2022-01-10 06:46:16,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:16,063 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:16,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345272372] [2022-01-10 06:46:16,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345272372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:16,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:16,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:16,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633843912] [2022-01-10 06:46:16,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:16,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:16,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:16,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:16,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:16,064 INFO L87 Difference]: Start difference. First operand 704 states and 941 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:46:16,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:16,133 INFO L93 Difference]: Finished difference Result 1431 states and 1927 transitions. [2022-01-10 06:46:16,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:16,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 267 [2022-01-10 06:46:16,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:16,136 INFO L225 Difference]: With dead ends: 1431 [2022-01-10 06:46:16,136 INFO L226 Difference]: Without dead ends: 722 [2022-01-10 06:46:16,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:16,137 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 33 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:16,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 681 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-01-10 06:46:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 722. [2022-01-10 06:46:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 603 states have (on average 1.3101160862354893) internal successors, (790), 609 states have internal predecessors, (790), 80 states have call successors, (80), 38 states have call predecessors, (80), 38 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-10 06:46:16,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 950 transitions. [2022-01-10 06:46:16,152 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 950 transitions. Word has length 267 [2022-01-10 06:46:16,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:16,152 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 950 transitions. [2022-01-10 06:46:16,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:46:16,153 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 950 transitions. [2022-01-10 06:46:16,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-01-10 06:46:16,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:16,154 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:16,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:16,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:16,361 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:16,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:16,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1830281755, now seen corresponding path program 1 times [2022-01-10 06:46:16,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:16,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238314751] [2022-01-10 06:46:16,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:16,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:16,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:16,363 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:16,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 06:46:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:16,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:46:16,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 54 proven. 92 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2022-01-10 06:46:17,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2022-01-10 06:46:17,528 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:17,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238314751] [2022-01-10 06:46:17,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238314751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:17,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:17,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2022-01-10 06:46:17,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591640956] [2022-01-10 06:46:17,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:17,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 06:46:17,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:17,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 06:46:17,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:46:17,530 INFO L87 Difference]: Start difference. First operand 722 states and 950 transitions. Second operand has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 18 states have internal predecessors, (155), 5 states have call successors, (29), 8 states have call predecessors, (29), 11 states have return successors, (29), 7 states have call predecessors, (29), 5 states have call successors, (29) [2022-01-10 06:46:18,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:18,788 INFO L93 Difference]: Finished difference Result 1391 states and 1916 transitions. [2022-01-10 06:46:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 06:46:18,789 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 18 states have internal predecessors, (155), 5 states have call successors, (29), 8 states have call predecessors, (29), 11 states have return successors, (29), 7 states have call predecessors, (29), 5 states have call successors, (29) Word has length 268 [2022-01-10 06:46:18,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:18,792 INFO L225 Difference]: With dead ends: 1391 [2022-01-10 06:46:18,792 INFO L226 Difference]: Without dead ends: 975 [2022-01-10 06:46:18,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 520 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 06:46:18,794 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 953 mSDsluCounter, 3655 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 4045 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:18,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [986 Valid, 4045 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1868 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 06:46:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-01-10 06:46:18,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 737. [2022-01-10 06:46:18,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 615 states have (on average 1.3040650406504064) internal successors, (802), 621 states have internal predecessors, (802), 80 states have call successors, (80), 40 states have call predecessors, (80), 41 states have return successors, (82), 79 states have call predecessors, (82), 80 states have call successors, (82) [2022-01-10 06:46:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 964 transitions. [2022-01-10 06:46:18,813 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 964 transitions. Word has length 268 [2022-01-10 06:46:18,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:18,814 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 964 transitions. [2022-01-10 06:46:18,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 18 states have internal predecessors, (155), 5 states have call successors, (29), 8 states have call predecessors, (29), 11 states have return successors, (29), 7 states have call predecessors, (29), 5 states have call successors, (29) [2022-01-10 06:46:18,814 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 964 transitions. [2022-01-10 06:46:18,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-01-10 06:46:18,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:18,815 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:18,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:19,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:19,023 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:19,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:19,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1503071524, now seen corresponding path program 1 times [2022-01-10 06:46:19,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:19,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855931205] [2022-01-10 06:46:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:19,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:19,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:19,026 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:19,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 06:46:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:19,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:19,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2022-01-10 06:46:19,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:19,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:19,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855931205] [2022-01-10 06:46:19,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855931205] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:19,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:19,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:19,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38467640] [2022-01-10 06:46:19,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:19,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:19,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:19,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:19,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:19,465 INFO L87 Difference]: Start difference. First operand 737 states and 964 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:46:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:19,522 INFO L93 Difference]: Finished difference Result 1180 states and 1586 transitions. [2022-01-10 06:46:19,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:19,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 268 [2022-01-10 06:46:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:19,525 INFO L225 Difference]: With dead ends: 1180 [2022-01-10 06:46:19,525 INFO L226 Difference]: Without dead ends: 733 [2022-01-10 06:46:19,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:19,526 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 31 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:19,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 681 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:19,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-10 06:46:19,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 733. [2022-01-10 06:46:19,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 612 states have (on average 1.2892156862745099) internal successors, (789), 618 states have internal predecessors, (789), 80 states have call successors, (80), 40 states have call predecessors, (80), 40 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-10 06:46:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 949 transitions. [2022-01-10 06:46:19,568 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 949 transitions. Word has length 268 [2022-01-10 06:46:19,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:19,568 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 949 transitions. [2022-01-10 06:46:19,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:46:19,569 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 949 transitions. [2022-01-10 06:46:19,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-10 06:46:19,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:19,570 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 7, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:19,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:19,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:19,780 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:19,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:19,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1357783446, now seen corresponding path program 1 times [2022-01-10 06:46:19,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:19,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146439172] [2022-01-10 06:46:19,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:19,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:19,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:19,782 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:19,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 06:46:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:19,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:46:19,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 263 proven. 105 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-01-10 06:46:20,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 65 proven. 126 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2022-01-10 06:46:20,961 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:20,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146439172] [2022-01-10 06:46:20,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146439172] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:20,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:20,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2022-01-10 06:46:20,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774952589] [2022-01-10 06:46:20,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:20,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 06:46:20,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:20,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 06:46:20,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:46:20,965 INFO L87 Difference]: Start difference. First operand 733 states and 949 transitions. Second operand has 21 states, 21 states have (on average 7.809523809523809) internal successors, (164), 18 states have internal predecessors, (164), 5 states have call successors, (29), 8 states have call predecessors, (29), 14 states have return successors, (29), 7 states have call predecessors, (29), 5 states have call successors, (29) [2022-01-10 06:46:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:22,211 INFO L93 Difference]: Finished difference Result 1369 states and 1853 transitions. [2022-01-10 06:46:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 06:46:22,212 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.809523809523809) internal successors, (164), 18 states have internal predecessors, (164), 5 states have call successors, (29), 8 states have call predecessors, (29), 14 states have return successors, (29), 7 states have call predecessors, (29), 5 states have call successors, (29) Word has length 278 [2022-01-10 06:46:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:22,215 INFO L225 Difference]: With dead ends: 1369 [2022-01-10 06:46:22,215 INFO L226 Difference]: Without dead ends: 961 [2022-01-10 06:46:22,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 540 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 06:46:22,217 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 807 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:22,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 3586 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1859 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 06:46:22,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-01-10 06:46:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 739. [2022-01-10 06:46:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 617 states have (on average 1.2852512155591571) internal successors, (793), 623 states have internal predecessors, (793), 80 states have call successors, (80), 41 states have call predecessors, (80), 41 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-10 06:46:22,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 953 transitions. [2022-01-10 06:46:22,239 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 953 transitions. Word has length 278 [2022-01-10 06:46:22,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:22,239 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 953 transitions. [2022-01-10 06:46:22,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.809523809523809) internal successors, (164), 18 states have internal predecessors, (164), 5 states have call successors, (29), 8 states have call predecessors, (29), 14 states have return successors, (29), 7 states have call predecessors, (29), 5 states have call successors, (29) [2022-01-10 06:46:22,240 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 953 transitions. [2022-01-10 06:46:22,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-01-10 06:46:22,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:22,242 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:22,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:22,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:22,449 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:22,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:22,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1750415625, now seen corresponding path program 1 times [2022-01-10 06:46:22,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:22,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497789489] [2022-01-10 06:46:22,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:22,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:22,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:22,451 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:22,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 06:46:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:22,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:46:22,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 373 proven. 74 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-01-10 06:46:23,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 119 proven. 80 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-01-10 06:46:23,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:23,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497789489] [2022-01-10 06:46:23,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497789489] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:23,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:23,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2022-01-10 06:46:23,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141529257] [2022-01-10 06:46:23,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:23,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:46:23,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:23,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:46:23,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:46:23,598 INFO L87 Difference]: Start difference. First operand 739 states and 953 transitions. Second operand has 19 states, 19 states have (on average 8.526315789473685) internal successors, (162), 16 states have internal predecessors, (162), 5 states have call successors, (29), 6 states have call predecessors, (29), 12 states have return successors, (29), 7 states have call predecessors, (29), 5 states have call successors, (29) [2022-01-10 06:46:24,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:24,702 INFO L93 Difference]: Finished difference Result 1422 states and 1916 transitions. [2022-01-10 06:46:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 06:46:24,703 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.526315789473685) internal successors, (162), 16 states have internal predecessors, (162), 5 states have call successors, (29), 6 states have call predecessors, (29), 12 states have return successors, (29), 7 states have call predecessors, (29), 5 states have call successors, (29) Word has length 289 [2022-01-10 06:46:24,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:24,707 INFO L225 Difference]: With dead ends: 1422 [2022-01-10 06:46:24,707 INFO L226 Difference]: Without dead ends: 1014 [2022-01-10 06:46:24,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 563 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 06:46:24,708 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 892 mSDsluCounter, 3085 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 3474 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:24,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [910 Valid, 3474 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1831 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 06:46:24,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-01-10 06:46:24,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 746. [2022-01-10 06:46:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 623 states have (on average 1.2808988764044944) internal successors, (798), 629 states have internal predecessors, (798), 80 states have call successors, (80), 42 states have call predecessors, (80), 42 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-10 06:46:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 958 transitions. [2022-01-10 06:46:24,743 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 958 transitions. Word has length 289 [2022-01-10 06:46:24,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:24,743 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 958 transitions. [2022-01-10 06:46:24,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.526315789473685) internal successors, (162), 16 states have internal predecessors, (162), 5 states have call successors, (29), 6 states have call predecessors, (29), 12 states have return successors, (29), 7 states have call predecessors, (29), 5 states have call successors, (29) [2022-01-10 06:46:24,744 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 958 transitions. [2022-01-10 06:46:24,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-01-10 06:46:24,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:24,745 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:24,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:24,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:24,952 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:24,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:24,953 INFO L85 PathProgramCache]: Analyzing trace with hash -785059678, now seen corresponding path program 1 times [2022-01-10 06:46:24,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:24,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172884477] [2022-01-10 06:46:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:24,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:24,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:24,954 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:24,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 06:46:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:25,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:46:25,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2022-01-10 06:46:25,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:25,429 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:25,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172884477] [2022-01-10 06:46:25,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172884477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:25,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:25,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:46:25,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580528663] [2022-01-10 06:46:25,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:25,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:46:25,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:25,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:46:25,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:46:25,431 INFO L87 Difference]: Start difference. First operand 746 states and 958 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-01-10 06:46:25,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:25,593 INFO L93 Difference]: Finished difference Result 1929 states and 2765 transitions. [2022-01-10 06:46:25,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:46:25,593 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 298 [2022-01-10 06:46:25,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:25,599 INFO L225 Difference]: With dead ends: 1929 [2022-01-10 06:46:25,599 INFO L226 Difference]: Without dead ends: 1521 [2022-01-10 06:46:25,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:46:25,601 INFO L933 BasicCegarLoop]: 702 mSDtfsCounter, 384 mSDsluCounter, 2192 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 2894 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:25,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 2894 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:25,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2022-01-10 06:46:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 785. [2022-01-10 06:46:25,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 653 states have (on average 1.2879019908116387) internal successors, (841), 659 states have internal predecessors, (841), 89 states have call successors, (89), 42 states have call predecessors, (89), 42 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-10 06:46:25,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1019 transitions. [2022-01-10 06:46:25,631 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1019 transitions. Word has length 298 [2022-01-10 06:46:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:25,632 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 1019 transitions. [2022-01-10 06:46:25,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-01-10 06:46:25,632 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1019 transitions. [2022-01-10 06:46:25,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-01-10 06:46:25,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:25,633 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:25,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:25,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:25,843 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:25,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:25,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1679492638, now seen corresponding path program 1 times [2022-01-10 06:46:25,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:25,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911025406] [2022-01-10 06:46:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:25,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:25,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:25,845 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:25,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 06:46:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:25,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:46:25,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 27 proven. 162 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2022-01-10 06:46:26,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-01-10 06:46:27,055 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:27,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911025406] [2022-01-10 06:46:27,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911025406] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:27,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:27,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:46:27,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335531102] [2022-01-10 06:46:27,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:27,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:46:27,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:27,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:46:27,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:46:27,056 INFO L87 Difference]: Start difference. First operand 785 states and 1019 transitions. Second operand has 19 states, 19 states have (on average 11.31578947368421) internal successors, (215), 17 states have internal predecessors, (215), 7 states have call successors, (35), 5 states have call predecessors, (35), 7 states have return successors, (34), 9 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-10 06:46:29,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:29,566 INFO L93 Difference]: Finished difference Result 2937 states and 4179 transitions. [2022-01-10 06:46:29,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-10 06:46:29,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 11.31578947368421) internal successors, (215), 17 states have internal predecessors, (215), 7 states have call successors, (35), 5 states have call predecessors, (35), 7 states have return successors, (34), 9 states have call predecessors, (34), 7 states have call successors, (34) Word has length 298 [2022-01-10 06:46:29,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:29,576 INFO L225 Difference]: With dead ends: 2937 [2022-01-10 06:46:29,576 INFO L226 Difference]: Without dead ends: 2483 [2022-01-10 06:46:29,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 583 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=1896, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 06:46:29,578 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 2097 mSDsluCounter, 6192 mSDsCounter, 0 mSdLazyCounter, 3492 mSolverCounterSat, 991 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2106 SdHoareTripleChecker+Valid, 6574 SdHoareTripleChecker+Invalid, 4483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 991 IncrementalHoareTripleChecker+Valid, 3492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:29,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2106 Valid, 6574 Invalid, 4483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [991 Valid, 3492 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-10 06:46:29,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2022-01-10 06:46:29,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 872. [2022-01-10 06:46:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 725 states have (on average 1.2758620689655173) internal successors, (925), 730 states have internal predecessors, (925), 98 states have call successors, (98), 46 states have call predecessors, (98), 48 states have return successors, (122), 99 states have call predecessors, (122), 98 states have call successors, (122) [2022-01-10 06:46:29,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1145 transitions. [2022-01-10 06:46:29,627 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1145 transitions. Word has length 298 [2022-01-10 06:46:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:29,628 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 1145 transitions. [2022-01-10 06:46:29,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.31578947368421) internal successors, (215), 17 states have internal predecessors, (215), 7 states have call successors, (35), 5 states have call predecessors, (35), 7 states have return successors, (34), 9 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-10 06:46:29,628 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1145 transitions. [2022-01-10 06:46:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-01-10 06:46:29,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:29,629 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:29,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:29,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:29,841 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:29,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:29,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1728419810, now seen corresponding path program 1 times [2022-01-10 06:46:29,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:29,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931415485] [2022-01-10 06:46:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:29,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:29,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:29,844 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:29,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 06:46:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:29,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:46:29,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 40 proven. 147 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2022-01-10 06:46:30,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-01-10 06:46:31,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:31,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931415485] [2022-01-10 06:46:31,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931415485] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:31,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:31,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:46:31,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830505928] [2022-01-10 06:46:31,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:31,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:46:31,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:31,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:46:31,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:46:31,022 INFO L87 Difference]: Start difference. First operand 872 states and 1145 transitions. Second operand has 19 states, 19 states have (on average 11.105263157894736) internal successors, (211), 17 states have internal predecessors, (211), 7 states have call successors, (35), 5 states have call predecessors, (35), 7 states have return successors, (34), 9 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-10 06:46:33,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:33,867 INFO L93 Difference]: Finished difference Result 3426 states and 4872 transitions. [2022-01-10 06:46:33,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-10 06:46:33,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 11.105263157894736) internal successors, (211), 17 states have internal predecessors, (211), 7 states have call successors, (35), 5 states have call predecessors, (35), 7 states have return successors, (34), 9 states have call predecessors, (34), 7 states have call successors, (34) Word has length 298 [2022-01-10 06:46:33,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:33,878 INFO L225 Difference]: With dead ends: 3426 [2022-01-10 06:46:33,878 INFO L226 Difference]: Without dead ends: 2894 [2022-01-10 06:46:33,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=495, Invalid=2697, Unknown=0, NotChecked=0, Total=3192 [2022-01-10 06:46:33,880 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 2444 mSDsluCounter, 6293 mSDsCounter, 0 mSdLazyCounter, 3827 mSolverCounterSat, 1347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2453 SdHoareTripleChecker+Valid, 6824 SdHoareTripleChecker+Invalid, 5174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1347 IncrementalHoareTripleChecker+Valid, 3827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:33,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2453 Valid, 6824 Invalid, 5174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1347 Valid, 3827 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-10 06:46:33,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2022-01-10 06:46:33,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 1209. [2022-01-10 06:46:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 993 states have (on average 1.2769385699899296) internal successors, (1268), 1000 states have internal predecessors, (1268), 152 states have call successors, (152), 58 states have call predecessors, (152), 63 states have return successors, (212), 154 states have call predecessors, (212), 152 states have call successors, (212) [2022-01-10 06:46:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1632 transitions. [2022-01-10 06:46:33,945 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1632 transitions. Word has length 298 [2022-01-10 06:46:33,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:33,945 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 1632 transitions. [2022-01-10 06:46:33,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.105263157894736) internal successors, (211), 17 states have internal predecessors, (211), 7 states have call successors, (35), 5 states have call predecessors, (35), 7 states have return successors, (34), 9 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-10 06:46:33,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1632 transitions. [2022-01-10 06:46:33,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-10 06:46:33,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:33,947 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:33,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:34,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:34,154 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:34,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:34,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1120685963, now seen corresponding path program 1 times [2022-01-10 06:46:34,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:34,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664873900] [2022-01-10 06:46:34,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:34,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:34,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:34,156 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:34,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 06:46:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:34,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:34,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-01-10 06:46:34,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:34,586 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:34,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664873900] [2022-01-10 06:46:34,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664873900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:34,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:34,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:34,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563710505] [2022-01-10 06:46:34,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:34,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:34,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:34,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:34,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:34,587 INFO L87 Difference]: Start difference. First operand 1209 states and 1632 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:46:34,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:34,717 INFO L93 Difference]: Finished difference Result 2268 states and 3098 transitions. [2022-01-10 06:46:34,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:34,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 299 [2022-01-10 06:46:34,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:34,722 INFO L225 Difference]: With dead ends: 2268 [2022-01-10 06:46:34,722 INFO L226 Difference]: Without dead ends: 1189 [2022-01-10 06:46:34,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:34,724 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 8 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:34,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 698 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2022-01-10 06:46:34,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1189. [2022-01-10 06:46:34,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 980 states have (on average 1.2622448979591836) internal successors, (1237), 990 states have internal predecessors, (1237), 143 states have call successors, (143), 65 states have call predecessors, (143), 65 states have return successors, (143), 137 states have call predecessors, (143), 143 states have call successors, (143) [2022-01-10 06:46:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1523 transitions. [2022-01-10 06:46:34,771 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1523 transitions. Word has length 299 [2022-01-10 06:46:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:34,772 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 1523 transitions. [2022-01-10 06:46:34,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:46:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1523 transitions. [2022-01-10 06:46:34,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-01-10 06:46:34,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:34,773 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 8, 8, 8, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:34,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:34,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:34,981 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:34,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:34,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1346543107, now seen corresponding path program 1 times [2022-01-10 06:46:34,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:34,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521333496] [2022-01-10 06:46:34,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:34,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:34,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:34,983 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:34,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 06:46:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:35,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:46:35,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 835 trivial. 0 not checked. [2022-01-10 06:46:35,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:35,440 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:35,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521333496] [2022-01-10 06:46:35,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521333496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:35,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:35,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:46:35,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305975364] [2022-01-10 06:46:35,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:35,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:46:35,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:35,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:46:35,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:46:35,441 INFO L87 Difference]: Start difference. First operand 1189 states and 1523 transitions. Second operand has 6 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 1 states have call predecessors, (19), 1 states have call successors, (19) [2022-01-10 06:46:35,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:35,567 INFO L93 Difference]: Finished difference Result 1738 states and 2362 transitions. [2022-01-10 06:46:35,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:46:35,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 1 states have call predecessors, (19), 1 states have call successors, (19) Word has length 316 [2022-01-10 06:46:35,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:35,573 INFO L225 Difference]: With dead ends: 1738 [2022-01-10 06:46:35,573 INFO L226 Difference]: Without dead ends: 1736 [2022-01-10 06:46:35,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:46:35,574 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 198 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:35,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1746 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:35,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2022-01-10 06:46:35,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1195. [2022-01-10 06:46:35,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 984 states have (on average 1.261178861788618) internal successors, (1241), 995 states have internal predecessors, (1241), 144 states have call successors, (144), 66 states have call predecessors, (144), 66 states have return successors, (144), 137 states have call predecessors, (144), 144 states have call successors, (144) [2022-01-10 06:46:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1529 transitions. [2022-01-10 06:46:35,632 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1529 transitions. Word has length 316 [2022-01-10 06:46:35,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:35,632 INFO L470 AbstractCegarLoop]: Abstraction has 1195 states and 1529 transitions. [2022-01-10 06:46:35,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 1 states have call predecessors, (19), 1 states have call successors, (19) [2022-01-10 06:46:35,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1529 transitions. [2022-01-10 06:46:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-01-10 06:46:35,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:35,634 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 9, 8, 8, 8, 8, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:35,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:35,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:35,843 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:35,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:35,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1770719143, now seen corresponding path program 1 times [2022-01-10 06:46:35,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:35,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783248477] [2022-01-10 06:46:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:35,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:35,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:35,845 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:35,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 06:46:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:36,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:46:36,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 382 proven. 69 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2022-01-10 06:46:36,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:36,797 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:36,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783248477] [2022-01-10 06:46:36,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783248477] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:46:36,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1018461626] [2022-01-10 06:46:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:36,797 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 06:46:36,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 06:46:36,798 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 06:46:36,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-01-10 06:46:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:37,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:46:37,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 382 proven. 69 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2022-01-10 06:46:37,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:37,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1018461626] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:46:37,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:37,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2022-01-10 06:46:37,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524343816] [2022-01-10 06:46:37,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:37,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:46:37,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:37,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:46:37,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:46:37,717 INFO L87 Difference]: Start difference. First operand 1195 states and 1529 transitions. Second operand has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 9 states have internal predecessors, (150), 5 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2022-01-10 06:46:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:38,055 INFO L93 Difference]: Finished difference Result 2490 states and 3253 transitions. [2022-01-10 06:46:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:46:38,056 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 9 states have internal predecessors, (150), 5 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) Word has length 324 [2022-01-10 06:46:38,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:38,060 INFO L225 Difference]: With dead ends: 2490 [2022-01-10 06:46:38,061 INFO L226 Difference]: Without dead ends: 1640 [2022-01-10 06:46:38,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 993 GetRequests, 970 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:46:38,062 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 295 mSDsluCounter, 3079 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 3496 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:38,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 3496 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:46:38,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2022-01-10 06:46:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1204. [2022-01-10 06:46:38,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 991 states have (on average 1.2593340060544904) internal successors, (1248), 1002 states have internal predecessors, (1248), 144 states have call successors, (144), 67 states have call predecessors, (144), 68 states have return successors, (145), 138 states have call predecessors, (145), 144 states have call successors, (145) [2022-01-10 06:46:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1537 transitions. [2022-01-10 06:46:38,117 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1537 transitions. Word has length 324 [2022-01-10 06:46:38,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:38,118 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 1537 transitions. [2022-01-10 06:46:38,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 9 states have internal predecessors, (150), 5 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2022-01-10 06:46:38,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1537 transitions. [2022-01-10 06:46:38,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-01-10 06:46:38,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:38,123 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 9, 8, 8, 8, 8, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:38,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:38,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:38,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:38,527 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:38,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:38,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1562634136, now seen corresponding path program 1 times [2022-01-10 06:46:38,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:38,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941674390] [2022-01-10 06:46:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:38,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:38,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:38,528 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:38,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 06:46:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:38,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:38,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-01-10 06:46:38,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:38,988 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:38,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941674390] [2022-01-10 06:46:38,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941674390] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:38,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:38,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:38,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246594777] [2022-01-10 06:46:38,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:38,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:38,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:38,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:38,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:38,989 INFO L87 Difference]: Start difference. First operand 1204 states and 1537 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:46:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:39,086 INFO L93 Difference]: Finished difference Result 2063 states and 2671 transitions. [2022-01-10 06:46:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:39,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 324 [2022-01-10 06:46:39,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:39,090 INFO L225 Difference]: With dead ends: 2063 [2022-01-10 06:46:39,090 INFO L226 Difference]: Without dead ends: 1188 [2022-01-10 06:46:39,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:39,092 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 10 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:39,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 695 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:39,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-01-10 06:46:39,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1188. [2022-01-10 06:46:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 980 states have (on average 1.2428571428571429) internal successors, (1218), 991 states have internal predecessors, (1218), 140 states have call successors, (140), 67 states have call predecessors, (140), 67 states have return successors, (140), 133 states have call predecessors, (140), 140 states have call successors, (140) [2022-01-10 06:46:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1498 transitions. [2022-01-10 06:46:39,143 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1498 transitions. Word has length 324 [2022-01-10 06:46:39,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:39,143 INFO L470 AbstractCegarLoop]: Abstraction has 1188 states and 1498 transitions. [2022-01-10 06:46:39,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:46:39,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1498 transitions. [2022-01-10 06:46:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-10 06:46:39,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:39,145 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 10, 9, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:39,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:39,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:39,353 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:39,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:39,354 INFO L85 PathProgramCache]: Analyzing trace with hash 221284344, now seen corresponding path program 1 times [2022-01-10 06:46:39,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:39,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911339239] [2022-01-10 06:46:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:39,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:39,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:39,355 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:39,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 06:46:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:39,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 06:46:39,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 335 proven. 0 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2022-01-10 06:46:40,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:40,242 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:40,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911339239] [2022-01-10 06:46:40,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911339239] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:40,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:40,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-10 06:46:40,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938249851] [2022-01-10 06:46:40,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:40,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:46:40,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:40,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:46:40,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:46:40,244 INFO L87 Difference]: Start difference. First operand 1188 states and 1498 transitions. Second operand has 11 states, 11 states have (on average 11.909090909090908) internal successors, (131), 9 states have internal predecessors, (131), 4 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2022-01-10 06:46:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:40,989 INFO L93 Difference]: Finished difference Result 2767 states and 3588 transitions. [2022-01-10 06:46:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 06:46:40,990 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.909090909090908) internal successors, (131), 9 states have internal predecessors, (131), 4 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) Word has length 339 [2022-01-10 06:46:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:40,995 INFO L225 Difference]: With dead ends: 2767 [2022-01-10 06:46:40,995 INFO L226 Difference]: Without dead ends: 1956 [2022-01-10 06:46:40,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 06:46:40,997 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 1057 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:40,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1061 Valid, 2010 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:46:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-01-10 06:46:41,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1337. [2022-01-10 06:46:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1101 states have (on average 1.2397820163487738) internal successors, (1365), 1109 states have internal predecessors, (1365), 158 states have call successors, (158), 77 states have call predecessors, (158), 77 states have return successors, (158), 150 states have call predecessors, (158), 158 states have call successors, (158) [2022-01-10 06:46:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1681 transitions. [2022-01-10 06:46:41,073 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1681 transitions. Word has length 339 [2022-01-10 06:46:41,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:41,073 INFO L470 AbstractCegarLoop]: Abstraction has 1337 states and 1681 transitions. [2022-01-10 06:46:41,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.909090909090908) internal successors, (131), 9 states have internal predecessors, (131), 4 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2022-01-10 06:46:41,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1681 transitions. [2022-01-10 06:46:41,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-01-10 06:46:41,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:41,075 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 8, 8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:41,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-01-10 06:46:41,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:41,283 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:41,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:41,283 INFO L85 PathProgramCache]: Analyzing trace with hash -720092436, now seen corresponding path program 1 times [2022-01-10 06:46:41,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:41,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297007600] [2022-01-10 06:46:41,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:41,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:41,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:41,285 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:41,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-01-10 06:46:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:41,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:46:41,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 232 proven. 41 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-01-10 06:46:42,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:42,995 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:42,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297007600] [2022-01-10 06:46:42,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297007600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:46:42,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [30115141] [2022-01-10 06:46:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:42,995 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 06:46:42,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 06:46:42,996 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 06:46:42,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-01-10 06:46:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:43,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:43,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2022-01-10 06:46:43,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:43,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [30115141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:43,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:46:43,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-01-10 06:46:43,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915907449] [2022-01-10 06:46:43,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:43,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:43,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:43,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:43,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:46:43,569 INFO L87 Difference]: Start difference. First operand 1337 states and 1681 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-01-10 06:46:43,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:43,678 INFO L93 Difference]: Finished difference Result 2535 states and 3233 transitions. [2022-01-10 06:46:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:43,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 358 [2022-01-10 06:46:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:43,683 INFO L225 Difference]: With dead ends: 2535 [2022-01-10 06:46:43,683 INFO L226 Difference]: Without dead ends: 1578 [2022-01-10 06:46:43,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 857 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:46:43,685 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 182 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:43,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 963 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 93 Unchecked, 0.0s Time] [2022-01-10 06:46:43,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2022-01-10 06:46:43,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1264. [2022-01-10 06:46:43,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1046 states have (on average 1.2332695984703632) internal successors, (1290), 1053 states have internal predecessors, (1290), 149 states have call successors, (149), 68 states have call predecessors, (149), 68 states have return successors, (149), 142 states have call predecessors, (149), 149 states have call successors, (149) [2022-01-10 06:46:43,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1588 transitions. [2022-01-10 06:46:43,750 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1588 transitions. Word has length 358 [2022-01-10 06:46:43,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:43,750 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 1588 transitions. [2022-01-10 06:46:43,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-01-10 06:46:43,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1588 transitions. [2022-01-10 06:46:43,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-01-10 06:46:43,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:43,753 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 10, 10, 10, 9, 8, 8, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:43,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:43,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:44,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:44,156 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:44,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:44,156 INFO L85 PathProgramCache]: Analyzing trace with hash 251089372, now seen corresponding path program 1 times [2022-01-10 06:46:44,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:44,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495924678] [2022-01-10 06:46:44,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:44,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:44,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:44,158 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:44,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-01-10 06:46:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:44,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:46:44,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 212 proven. 267 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-01-10 06:46:45,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:45,920 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:45,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495924678] [2022-01-10 06:46:45,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495924678] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:46:45,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1946944253] [2022-01-10 06:46:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:45,921 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 06:46:45,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 06:46:45,922 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 06:46:45,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-01-10 06:46:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:46,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 06:46:46,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 400 proven. 89 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2022-01-10 06:46:46,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 42 proven. 77 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2022-01-10 06:46:47,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1946944253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:47,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 06:46:47,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 14] total 29 [2022-01-10 06:46:47,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134936577] [2022-01-10 06:46:47,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:47,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 06:46:47,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:47,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 06:46:47,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 06:46:47,509 INFO L87 Difference]: Start difference. First operand 1264 states and 1588 transitions. Second operand has 29 states, 29 states have (on average 13.413793103448276) internal successors, (389), 28 states have internal predecessors, (389), 10 states have call successors, (70), 13 states have call predecessors, (70), 17 states have return successors, (70), 11 states have call predecessors, (70), 10 states have call successors, (70) [2022-01-10 06:46:51,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:51,694 INFO L93 Difference]: Finished difference Result 5945 states and 7730 transitions. [2022-01-10 06:46:51,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-10 06:46:51,698 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 13.413793103448276) internal successors, (389), 28 states have internal predecessors, (389), 10 states have call successors, (70), 13 states have call predecessors, (70), 17 states have return successors, (70), 11 states have call predecessors, (70), 10 states have call successors, (70) Word has length 399 [2022-01-10 06:46:51,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:51,710 INFO L225 Difference]: With dead ends: 5945 [2022-01-10 06:46:51,710 INFO L226 Difference]: Without dead ends: 5063 [2022-01-10 06:46:51,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1480 GetRequests, 1376 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2686 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=962, Invalid=9750, Unknown=0, NotChecked=0, Total=10712 [2022-01-10 06:46:51,713 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 2641 mSDsluCounter, 13818 mSDsCounter, 0 mSdLazyCounter, 5691 mSolverCounterSat, 941 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2687 SdHoareTripleChecker+Valid, 14764 SdHoareTripleChecker+Invalid, 8250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 941 IncrementalHoareTripleChecker+Valid, 5691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1618 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:51,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2687 Valid, 14764 Invalid, 8250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [941 Valid, 5691 Invalid, 0 Unknown, 1618 Unchecked, 2.6s Time] [2022-01-10 06:46:51,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2022-01-10 06:46:51,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 2940. [2022-01-10 06:46:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2940 states, 2387 states have (on average 1.2438206954335986) internal successors, (2969), 2407 states have internal predecessors, (2969), 381 states have call successors, (381), 171 states have call predecessors, (381), 171 states have return successors, (381), 361 states have call predecessors, (381), 381 states have call successors, (381) [2022-01-10 06:46:51,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 3731 transitions. [2022-01-10 06:46:51,912 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 3731 transitions. Word has length 399 [2022-01-10 06:46:51,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:51,912 INFO L470 AbstractCegarLoop]: Abstraction has 2940 states and 3731 transitions. [2022-01-10 06:46:51,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 13.413793103448276) internal successors, (389), 28 states have internal predecessors, (389), 10 states have call successors, (70), 13 states have call predecessors, (70), 17 states have return successors, (70), 11 states have call predecessors, (70), 10 states have call successors, (70) [2022-01-10 06:46:51,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 3731 transitions. [2022-01-10 06:46:51,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-01-10 06:46:51,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:51,918 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 10, 10, 10, 9, 8, 8, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:51,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:52,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:52,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:52,329 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:52,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:52,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1555882650, now seen corresponding path program 1 times [2022-01-10 06:46:52,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:52,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851960963] [2022-01-10 06:46:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:52,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:52,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:52,332 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:52,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-01-10 06:46:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:52,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:46:52,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1119 backedges. 212 proven. 263 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-01-10 06:46:53,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:54,080 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:54,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851960963] [2022-01-10 06:46:54,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851960963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:46:54,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [119775705] [2022-01-10 06:46:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:54,080 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 06:46:54,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 06:46:54,081 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 06:46:54,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-01-10 06:46:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:54,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:54,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1119 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 911 trivial. 0 not checked. [2022-01-10 06:46:54,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:54,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [119775705] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:54,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:46:54,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2022-01-10 06:46:54,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306072851] [2022-01-10 06:46:54,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:54,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:54,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:54,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:54,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:46:54,645 INFO L87 Difference]: Start difference. First operand 2940 states and 3731 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-01-10 06:46:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:54,904 INFO L93 Difference]: Finished difference Result 7608 states and 9734 transitions. [2022-01-10 06:46:54,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:54,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 399 [2022-01-10 06:46:54,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:54,916 INFO L225 Difference]: With dead ends: 7608 [2022-01-10 06:46:54,916 INFO L226 Difference]: Without dead ends: 5327 [2022-01-10 06:46:54,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 976 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:46:54,922 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 168 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:54,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 557 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:54,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5327 states. [2022-01-10 06:46:55,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5327 to 3287. [2022-01-10 06:46:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3287 states, 2734 states have (on average 1.2403072421360644) internal successors, (3391), 2754 states have internal predecessors, (3391), 381 states have call successors, (381), 171 states have call predecessors, (381), 171 states have return successors, (381), 361 states have call predecessors, (381), 381 states have call successors, (381) [2022-01-10 06:46:55,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3287 states to 3287 states and 4153 transitions. [2022-01-10 06:46:55,150 INFO L78 Accepts]: Start accepts. Automaton has 3287 states and 4153 transitions. Word has length 399 [2022-01-10 06:46:55,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:55,151 INFO L470 AbstractCegarLoop]: Abstraction has 3287 states and 4153 transitions. [2022-01-10 06:46:55,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-01-10 06:46:55,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3287 states and 4153 transitions. [2022-01-10 06:46:55,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-01-10 06:46:55,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:55,156 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 10, 10, 10, 9, 8, 8, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:55,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:55,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:55,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:55,558 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:55,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:55,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1804029144, now seen corresponding path program 1 times [2022-01-10 06:46:55,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:55,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264676163] [2022-01-10 06:46:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:55,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:55,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:55,560 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:55,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-01-10 06:46:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:55,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:46:55,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1119 backedges. 212 proven. 263 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-01-10 06:46:56,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:57,324 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:57,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264676163] [2022-01-10 06:46:57,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264676163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:46:57,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1954025498] [2022-01-10 06:46:57,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:57,325 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 06:46:57,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 06:46:57,326 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 06:46:57,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-01-10 06:46:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:57,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:57,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1119 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2022-01-10 06:46:57,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:57,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1954025498] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:57,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:46:57,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2022-01-10 06:46:57,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599464627] [2022-01-10 06:46:57,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:57,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:57,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:57,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:57,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:46:57,892 INFO L87 Difference]: Start difference. First operand 3287 states and 4153 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-01-10 06:46:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:58,072 INFO L93 Difference]: Finished difference Result 5848 states and 7453 transitions. [2022-01-10 06:46:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:58,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 399 [2022-01-10 06:46:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:58,079 INFO L225 Difference]: With dead ends: 5848 [2022-01-10 06:46:58,079 INFO L226 Difference]: Without dead ends: 3171 [2022-01-10 06:46:58,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 976 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:46:58,084 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 0 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:58,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 494 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:58,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2022-01-10 06:46:58,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 3171. [2022-01-10 06:46:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3171 states, 2618 states have (on average 1.2303284950343774) internal successors, (3221), 2638 states have internal predecessors, (3221), 381 states have call successors, (381), 171 states have call predecessors, (381), 171 states have return successors, (381), 361 states have call predecessors, (381), 381 states have call successors, (381) [2022-01-10 06:46:58,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3171 states to 3171 states and 3983 transitions. [2022-01-10 06:46:58,300 INFO L78 Accepts]: Start accepts. Automaton has 3171 states and 3983 transitions. Word has length 399 [2022-01-10 06:46:58,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:58,300 INFO L470 AbstractCegarLoop]: Abstraction has 3171 states and 3983 transitions. [2022-01-10 06:46:58,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-01-10 06:46:58,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3171 states and 3983 transitions. [2022-01-10 06:46:58,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-01-10 06:46:58,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:58,305 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 10, 10, 10, 9, 8, 8, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:58,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-01-10 06:46:58,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-01-10 06:46:58,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-01-10 06:46:58,714 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:58,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:58,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1192934476, now seen corresponding path program 1 times [2022-01-10 06:46:58,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:58,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275282740] [2022-01-10 06:46:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:58,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:58,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:58,716 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:58,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-01-10 06:46:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:58,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:46:58,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 211 proven. 267 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-01-10 06:47:00,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:47:00,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:00,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275282740] [2022-01-10 06:47:00,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275282740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:47:00,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [801390591] [2022-01-10 06:47:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:00,398 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 06:47:00,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 06:47:00,399 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 06:47:00,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-01-10 06:47:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:00,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 06:47:00,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 400 proven. 88 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2022-01-10 06:47:01,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:47:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 42 proven. 76 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2022-01-10 06:47:01,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [801390591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:47:01,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 06:47:01,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 14] total 29 [2022-01-10 06:47:01,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477699199] [2022-01-10 06:47:01,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 06:47:01,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 06:47:01,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:01,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 06:47:01,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 06:47:01,949 INFO L87 Difference]: Start difference. First operand 3171 states and 3983 transitions. Second operand has 29 states, 29 states have (on average 13.482758620689655) internal successors, (391), 28 states have internal predecessors, (391), 10 states have call successors, (70), 13 states have call predecessors, (70), 17 states have return successors, (70), 11 states have call predecessors, (70), 10 states have call successors, (70)