/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-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 07:14:28,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 07:14:28,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 07:14:28,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 07:14:28,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 07:14:28,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 07:14:28,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 07:14:28,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 07:14:28,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 07:14:28,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 07:14:28,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 07:14:28,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 07:14:28,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 07:14:28,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 07:14:28,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 07:14:28,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 07:14:28,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 07:14:28,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 07:14:28,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 07:14:28,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 07:14:28,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 07:14:28,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 07:14:28,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 07:14:28,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 07:14:28,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 07:14:28,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 07:14:28,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 07:14:28,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 07:14:28,853 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 07:14:28,885 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 07:14:28,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 07:14:28,886 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 07:14:28,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 07:14:28,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 07:14:28,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 07:14:28,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 07:14:28,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 07:14:28,887 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 07:14:28,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 07:14:28,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 07:14:28,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 07:14:28,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 07:14:28,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 07:14:28,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 07:14:28,889 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 07:14:28,889 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 07:14:28,889 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 07:14:28,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 07:14:28,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 07:14:28,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 07:14:28,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 07:14:28,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 07:14:28,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:14:28,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 07:14:28,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 07:14:28,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 07:14:28,894 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 07:14:28,895 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 07:14:28,895 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 07:14:28,895 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 07:14:28,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 07:14:28,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 07:14:28,895 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 07:14:29,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 07:14:29,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 07:14:29,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 07:14:29,123 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 07:14:29,123 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 07:14:29,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-01-10 07:14:29,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84bb5df85/2373dab621e6454a8be5489f72e600dc/FLAGa6ae17f6b [2022-01-10 07:14:29,604 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 07:14:29,605 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-01-10 07:14:29,611 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84bb5df85/2373dab621e6454a8be5489f72e600dc/FLAGa6ae17f6b [2022-01-10 07:14:29,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84bb5df85/2373dab621e6454a8be5489f72e600dc [2022-01-10 07:14:29,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 07:14:29,987 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 07:14:29,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 07:14:29,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 07:14:29,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 07:14:29,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:14:29" (1/1) ... [2022-01-10 07:14:29,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c59725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:29, skipping insertion in model container [2022-01-10 07:14:29,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:14:29" (1/1) ... [2022-01-10 07:14:29,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 07:14:30,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 07:14:30,297 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-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4940,4953] [2022-01-10 07:14:30,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:14:30,322 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 07:14:30,362 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-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4940,4953] [2022-01-10 07:14:30,373 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:14:30,386 INFO L208 MainTranslator]: Completed translation [2022-01-10 07:14:30,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:30 WrapperNode [2022-01-10 07:14:30,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 07:14:30,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 07:14:30,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 07:14:30,388 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 07:14:30,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:30" (1/1) ... [2022-01-10 07:14:30,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:30" (1/1) ... [2022-01-10 07:14:30,421 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 327 [2022-01-10 07:14:30,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 07:14:30,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 07:14:30,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 07:14:30,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 07:14:30,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:30" (1/1) ... [2022-01-10 07:14:30,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:30" (1/1) ... [2022-01-10 07:14:30,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:30" (1/1) ... [2022-01-10 07:14:30,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:30" (1/1) ... [2022-01-10 07:14:30,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:30" (1/1) ... [2022-01-10 07:14:30,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:30" (1/1) ... [2022-01-10 07:14:30,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:30" (1/1) ... [2022-01-10 07:14:30,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 07:14:30,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 07:14:30,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 07:14:30,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 07:14:30,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:30" (1/1) ... [2022-01-10 07:14:30,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:14:30,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 07:14:30,480 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 07:14:30,501 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 07:14:30,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 07:14:30,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 07:14:30,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 07:14:30,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 07:14:30,641 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 07:14:30,643 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 07:14:30,968 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 07:14:30,974 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 07:14:30,974 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 07:14:30,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:14:30 BoogieIcfgContainer [2022-01-10 07:14:30,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 07:14:30,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 07:14:30,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 07:14:30,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 07:14:30,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 07:14:29" (1/3) ... [2022-01-10 07:14:30,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae0a381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:14:30, skipping insertion in model container [2022-01-10 07:14:30,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:30" (2/3) ... [2022-01-10 07:14:30,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae0a381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:14:30, skipping insertion in model container [2022-01-10 07:14:30,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:14:30" (3/3) ... [2022-01-10 07:14:30,989 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-01-10 07:14:30,998 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 07:14:30,998 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 07:14:31,033 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 07:14:31,039 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 07:14:31,040 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 07:14:31,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 79 states have (on average 1.7088607594936709) internal successors, (135), 80 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-10 07:14:31,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:31,064 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:31,064 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:31,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:31,068 INFO L85 PathProgramCache]: Analyzing trace with hash 377049112, now seen corresponding path program 1 times [2022-01-10 07:14:31,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:31,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534000590] [2022-01-10 07:14:31,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:31,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:31,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:31,082 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 07:14:31,083 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 07:14:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:31,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:31,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:31,411 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 07:14:31,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:31,411 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:31,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534000590] [2022-01-10 07:14:31,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534000590] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:31,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:31,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:31,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930177802] [2022-01-10 07:14:31,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:31,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:31,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:31,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:31,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:31,451 INFO L87 Difference]: Start difference. First operand has 81 states, 79 states have (on average 1.7088607594936709) internal successors, (135), 80 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:31,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:31,529 INFO L93 Difference]: Finished difference Result 183 states and 292 transitions. [2022-01-10 07:14:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:31,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-01-10 07:14:31,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:31,539 INFO L225 Difference]: With dead ends: 183 [2022-01-10 07:14:31,540 INFO L226 Difference]: Without dead ends: 122 [2022-01-10 07:14:31,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 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 07:14:31,545 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 84 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:31,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 273 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:31,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-10 07:14:31,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-01-10 07:14:31,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.4705882352941178) internal successors, (175), 119 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 175 transitions. [2022-01-10 07:14:31,578 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 175 transitions. Word has length 48 [2022-01-10 07:14:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:31,578 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 175 transitions. [2022-01-10 07:14:31,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 175 transitions. [2022-01-10 07:14:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-10 07:14:31,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:31,580 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:31,593 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 07:14:31,790 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 07:14:31,790 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:31,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:31,791 INFO L85 PathProgramCache]: Analyzing trace with hash 292717965, now seen corresponding path program 1 times [2022-01-10 07:14:31,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:31,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782045779] [2022-01-10 07:14:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:31,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:31,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:31,794 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 07:14:31,796 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 07:14:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:31,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:31,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:32,230 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 07:14:32,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:32,230 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:32,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782045779] [2022-01-10 07:14:32,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782045779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:32,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:32,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:32,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65350358] [2022-01-10 07:14:32,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:32,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:32,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:32,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:32,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:32,234 INFO L87 Difference]: Start difference. First operand 120 states and 175 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:32,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:32,281 INFO L93 Difference]: Finished difference Result 224 states and 339 transitions. [2022-01-10 07:14:32,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:32,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-10 07:14:32,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:32,283 INFO L225 Difference]: With dead ends: 224 [2022-01-10 07:14:32,283 INFO L226 Difference]: Without dead ends: 130 [2022-01-10 07:14:32,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:32,285 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 36 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:32,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 167 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-01-10 07:14:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-10 07:14:32,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2022-01-10 07:14:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.4645669291338583) internal successors, (186), 127 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 186 transitions. [2022-01-10 07:14:32,295 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 186 transitions. Word has length 49 [2022-01-10 07:14:32,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:32,295 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 186 transitions. [2022-01-10 07:14:32,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:32,295 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 186 transitions. [2022-01-10 07:14:32,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-10 07:14:32,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:32,297 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:32,308 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 07:14:32,506 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 07:14:32,506 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:32,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:32,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1158250354, now seen corresponding path program 1 times [2022-01-10 07:14:32,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:32,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110366625] [2022-01-10 07:14:32,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:32,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:32,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:32,509 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 07:14:32,511 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 07:14:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:32,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:32,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:32,690 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 07:14:32,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:32,691 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:32,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110366625] [2022-01-10 07:14:32,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110366625] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:32,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:32,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:32,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681339550] [2022-01-10 07:14:32,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:32,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:32,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:32,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:32,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:32,693 INFO L87 Difference]: Start difference. First operand 128 states and 186 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:32,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:32,711 INFO L93 Difference]: Finished difference Result 300 states and 458 transitions. [2022-01-10 07:14:32,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:32,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-10 07:14:32,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:32,712 INFO L225 Difference]: With dead ends: 300 [2022-01-10 07:14:32,712 INFO L226 Difference]: Without dead ends: 206 [2022-01-10 07:14:32,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 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 07:14:32,714 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 62 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:32,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 231 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:32,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-10 07:14:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2022-01-10 07:14:32,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.5073891625615763) internal successors, (306), 203 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:32,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 306 transitions. [2022-01-10 07:14:32,746 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 306 transitions. Word has length 49 [2022-01-10 07:14:32,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:32,746 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 306 transitions. [2022-01-10 07:14:32,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 306 transitions. [2022-01-10 07:14:32,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 07:14:32,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:32,748 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:32,762 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 07:14:32,957 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 07:14:32,957 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:32,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:32,958 INFO L85 PathProgramCache]: Analyzing trace with hash 185835678, now seen corresponding path program 1 times [2022-01-10 07:14:32,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:32,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282168810] [2022-01-10 07:14:32,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:32,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:32,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:32,959 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 07:14:32,960 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 07:14:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:33,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:33,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:33,351 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 07:14:33,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:33,351 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:33,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282168810] [2022-01-10 07:14:33,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282168810] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:33,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:33,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:33,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244048922] [2022-01-10 07:14:33,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:33,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:33,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:33,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:33,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:33,353 INFO L87 Difference]: Start difference. First operand 204 states and 306 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:33,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:33,396 INFO L93 Difference]: Finished difference Result 381 states and 585 transitions. [2022-01-10 07:14:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:33,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-10 07:14:33,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:33,398 INFO L225 Difference]: With dead ends: 381 [2022-01-10 07:14:33,398 INFO L226 Difference]: Without dead ends: 211 [2022-01-10 07:14:33,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:33,400 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 31 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:33,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 172 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2022-01-10 07:14:33,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-10 07:14:33,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2022-01-10 07:14:33,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.5) internal successors, (312), 208 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 312 transitions. [2022-01-10 07:14:33,413 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 312 transitions. Word has length 50 [2022-01-10 07:14:33,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:33,414 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 312 transitions. [2022-01-10 07:14:33,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 312 transitions. [2022-01-10 07:14:33,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 07:14:33,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:33,415 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:33,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:33,624 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 07:14:33,624 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:33,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:33,625 INFO L85 PathProgramCache]: Analyzing trace with hash 957699331, now seen corresponding path program 1 times [2022-01-10 07:14:33,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:33,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443335826] [2022-01-10 07:14:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:33,626 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:33,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:33,627 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 07:14:33,628 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 07:14:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:33,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:33,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:33,783 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 07:14:33,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:33,783 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:33,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443335826] [2022-01-10 07:14:33,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443335826] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:33,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:33,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:33,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508287339] [2022-01-10 07:14:33,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:33,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:33,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:33,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:33,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:33,793 INFO L87 Difference]: Start difference. First operand 209 states and 312 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:33,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:33,813 INFO L93 Difference]: Finished difference Result 517 states and 798 transitions. [2022-01-10 07:14:33,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:33,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-10 07:14:33,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:33,815 INFO L225 Difference]: With dead ends: 517 [2022-01-10 07:14:33,815 INFO L226 Difference]: Without dead ends: 347 [2022-01-10 07:14:33,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 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 07:14:33,821 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 57 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:33,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 227 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:33,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-01-10 07:14:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 345. [2022-01-10 07:14:33,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.5232558139534884) internal successors, (524), 344 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:33,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 524 transitions. [2022-01-10 07:14:33,848 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 524 transitions. Word has length 50 [2022-01-10 07:14:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:33,848 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 524 transitions. [2022-01-10 07:14:33,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 524 transitions. [2022-01-10 07:14:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 07:14:33,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:33,850 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:33,875 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 07:14:34,059 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 07:14:34,060 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:34,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:34,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1764152988, now seen corresponding path program 1 times [2022-01-10 07:14:34,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:34,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129887726] [2022-01-10 07:14:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:34,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:34,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:34,062 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 07:14:34,063 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 07:14:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:34,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:34,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:34,465 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 07:14:34,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:34,466 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:34,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129887726] [2022-01-10 07:14:34,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129887726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:34,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:34,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:34,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008492886] [2022-01-10 07:14:34,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:34,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:34,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:34,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:34,469 INFO L87 Difference]: Start difference. First operand 345 states and 524 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:34,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:34,517 INFO L93 Difference]: Finished difference Result 658 states and 1015 transitions. [2022-01-10 07:14:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:34,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 07:14:34,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:34,520 INFO L225 Difference]: With dead ends: 658 [2022-01-10 07:14:34,520 INFO L226 Difference]: Without dead ends: 352 [2022-01-10 07:14:34,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:34,525 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 23 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:34,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 225 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 40 Unchecked, 0.0s Time] [2022-01-10 07:14:34,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-10 07:14:34,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 350. [2022-01-10 07:14:34,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.518624641833811) internal successors, (530), 349 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:34,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 530 transitions. [2022-01-10 07:14:34,539 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 530 transitions. Word has length 51 [2022-01-10 07:14:34,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:34,540 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 530 transitions. [2022-01-10 07:14:34,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:34,540 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 530 transitions. [2022-01-10 07:14:34,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 07:14:34,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:34,545 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:34,557 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 07:14:34,754 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 07:14:34,755 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:34,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:34,755 INFO L85 PathProgramCache]: Analyzing trace with hash -490284983, now seen corresponding path program 1 times [2022-01-10 07:14:34,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:34,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259124447] [2022-01-10 07:14:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:34,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:34,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:34,757 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 07:14:34,759 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 07:14:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:34,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:14:34,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:35,231 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 07:14:35,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:35,231 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:35,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259124447] [2022-01-10 07:14:35,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259124447] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:35,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:35,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 07:14:35,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493241311] [2022-01-10 07:14:35,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:35,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:14:35,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:35,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:14:35,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:35,233 INFO L87 Difference]: Start difference. First operand 350 states and 530 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:35,373 INFO L93 Difference]: Finished difference Result 1880 states and 2935 transitions. [2022-01-10 07:14:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:35,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 07:14:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:35,380 INFO L225 Difference]: With dead ends: 1880 [2022-01-10 07:14:35,380 INFO L226 Difference]: Without dead ends: 1574 [2022-01-10 07:14:35,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:35,382 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 484 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:35,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 486 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:14:35,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2022-01-10 07:14:35,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 958. [2022-01-10 07:14:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 1.5318704284221525) internal successors, (1466), 957 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:35,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1466 transitions. [2022-01-10 07:14:35,427 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1466 transitions. Word has length 51 [2022-01-10 07:14:35,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:35,427 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 1466 transitions. [2022-01-10 07:14:35,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:35,427 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1466 transitions. [2022-01-10 07:14:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 07:14:35,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:35,428 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, 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 07:14:35,442 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 07:14:35,637 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 07:14:35,637 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:35,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:35,638 INFO L85 PathProgramCache]: Analyzing trace with hash 360711877, now seen corresponding path program 1 times [2022-01-10 07:14:35,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:35,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961078782] [2022-01-10 07:14:35,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:35,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:35,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:35,639 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 07:14:35,640 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 07:14:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:35,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:35,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:35,844 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 07:14:35,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:35,845 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:35,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961078782] [2022-01-10 07:14:35,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961078782] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:35,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:35,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:35,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452763988] [2022-01-10 07:14:35,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:35,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:35,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:35,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:35,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:35,846 INFO L87 Difference]: Start difference. First operand 958 states and 1466 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:35,933 INFO L93 Difference]: Finished difference Result 2658 states and 4076 transitions. [2022-01-10 07:14:35,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:35,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-10 07:14:35,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:35,941 INFO L225 Difference]: With dead ends: 2658 [2022-01-10 07:14:35,941 INFO L226 Difference]: Without dead ends: 1744 [2022-01-10 07:14:35,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 51 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 07:14:35,943 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 47 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:35,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 181 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2022-01-10 07:14:36,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1718. [2022-01-10 07:14:36,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 1.496796738497379) internal successors, (2570), 1717 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:36,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2570 transitions. [2022-01-10 07:14:36,017 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2570 transitions. Word has length 53 [2022-01-10 07:14:36,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:36,017 INFO L470 AbstractCegarLoop]: Abstraction has 1718 states and 2570 transitions. [2022-01-10 07:14:36,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:36,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2570 transitions. [2022-01-10 07:14:36,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 07:14:36,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:36,018 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, 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 07:14:36,027 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 07:14:36,227 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 07:14:36,228 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:36,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1053660785, now seen corresponding path program 1 times [2022-01-10 07:14:36,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:36,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678918347] [2022-01-10 07:14:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:36,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:36,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:36,230 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 07:14:36,230 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 07:14:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:36,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 07:14:36,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:36,384 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 07:14:36,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:36,384 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:36,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678918347] [2022-01-10 07:14:36,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678918347] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:36,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:36,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:36,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74160478] [2022-01-10 07:14:36,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:36,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:14:36,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:36,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:14:36,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:14:36,386 INFO L87 Difference]: Start difference. First operand 1718 states and 2570 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:36,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:36,515 INFO L93 Difference]: Finished difference Result 3017 states and 4506 transitions. [2022-01-10 07:14:36,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:14:36,516 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-10 07:14:36,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:36,528 INFO L225 Difference]: With dead ends: 3017 [2022-01-10 07:14:36,528 INFO L226 Difference]: Without dead ends: 3015 [2022-01-10 07:14:36,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 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 07:14:36,531 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 148 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:36,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 370 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:36,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3015 states. [2022-01-10 07:14:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3015 to 1782. [2022-01-10 07:14:36,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 1.4744525547445255) internal successors, (2626), 1781 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 2626 transitions. [2022-01-10 07:14:36,641 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 2626 transitions. Word has length 54 [2022-01-10 07:14:36,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:36,641 INFO L470 AbstractCegarLoop]: Abstraction has 1782 states and 2626 transitions. [2022-01-10 07:14:36,641 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 2626 transitions. [2022-01-10 07:14:36,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 07:14:36,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:36,642 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, 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 07:14:36,653 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 07:14:36,851 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 07:14:36,851 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:36,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:36,852 INFO L85 PathProgramCache]: Analyzing trace with hash 789172572, now seen corresponding path program 1 times [2022-01-10 07:14:36,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:36,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303700336] [2022-01-10 07:14:36,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:36,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:36,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:36,853 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 07:14:36,854 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 07:14:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:36,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:36,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:37,016 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 07:14:37,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:37,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:37,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303700336] [2022-01-10 07:14:37,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303700336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:37,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:37,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:37,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652829390] [2022-01-10 07:14:37,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:37,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:37,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:37,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:37,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:37,018 INFO L87 Difference]: Start difference. First operand 1782 states and 2626 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:37,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:37,121 INFO L93 Difference]: Finished difference Result 3467 states and 5173 transitions. [2022-01-10 07:14:37,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:37,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-10 07:14:37,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:37,131 INFO L225 Difference]: With dead ends: 3467 [2022-01-10 07:14:37,131 INFO L226 Difference]: Without dead ends: 2504 [2022-01-10 07:14:37,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 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 07:14:37,133 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 69 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:37,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 243 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2022-01-10 07:14:37,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2502. [2022-01-10 07:14:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 1.471811275489804) internal successors, (3681), 2501 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 3681 transitions. [2022-01-10 07:14:37,272 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 3681 transitions. Word has length 54 [2022-01-10 07:14:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:37,273 INFO L470 AbstractCegarLoop]: Abstraction has 2502 states and 3681 transitions. [2022-01-10 07:14:37,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:37,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 3681 transitions. [2022-01-10 07:14:37,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 07:14:37,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:37,274 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:37,283 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 07:14:37,483 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 07:14:37,483 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:37,484 INFO L85 PathProgramCache]: Analyzing trace with hash 595199301, now seen corresponding path program 1 times [2022-01-10 07:14:37,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:37,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041406572] [2022-01-10 07:14:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:37,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:37,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:37,485 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 07:14:37,487 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 07:14:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:37,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:37,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:37,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:37,702 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:37,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041406572] [2022-01-10 07:14:37,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041406572] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:37,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:37,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:37,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384187702] [2022-01-10 07:14:37,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:37,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:37,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:37,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:37,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:37,704 INFO L87 Difference]: Start difference. First operand 2502 states and 3681 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:37,789 INFO L93 Difference]: Finished difference Result 4216 states and 6240 transitions. [2022-01-10 07:14:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:37,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-10 07:14:37,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:37,795 INFO L225 Difference]: With dead ends: 4216 [2022-01-10 07:14:37,796 INFO L226 Difference]: Without dead ends: 1758 [2022-01-10 07:14:37,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 07:14:37,799 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 51 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:37,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 232 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:37,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2022-01-10 07:14:37,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1756. [2022-01-10 07:14:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 1.4706552706552707) internal successors, (2581), 1755 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 2581 transitions. [2022-01-10 07:14:37,901 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 2581 transitions. Word has length 77 [2022-01-10 07:14:37,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:37,902 INFO L470 AbstractCegarLoop]: Abstraction has 1756 states and 2581 transitions. [2022-01-10 07:14:37,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:37,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 2581 transitions. [2022-01-10 07:14:37,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 07:14:37,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:37,903 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:37,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 07:14:38,112 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 07:14:38,112 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:38,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:38,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2055185859, now seen corresponding path program 1 times [2022-01-10 07:14:38,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:38,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793337198] [2022-01-10 07:14:38,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:38,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:38,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:38,114 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 07:14:38,115 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 07:14:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:38,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:14:38,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:39,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:39,512 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:39,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793337198] [2022-01-10 07:14:39,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793337198] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:39,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:39,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:14:39,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600609838] [2022-01-10 07:14:39,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:39,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:39,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:39,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:39,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:39,514 INFO L87 Difference]: Start difference. First operand 1756 states and 2581 transitions. Second operand has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:39,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:39,732 INFO L93 Difference]: Finished difference Result 3464 states and 5114 transitions. [2022-01-10 07:14:39,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 07:14:39,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-10 07:14:39,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:39,738 INFO L225 Difference]: With dead ends: 3464 [2022-01-10 07:14:39,738 INFO L226 Difference]: Without dead ends: 1782 [2022-01-10 07:14:39,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-10 07:14:39,741 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 151 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:39,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 594 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 74 Unchecked, 0.0s Time] [2022-01-10 07:14:39,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2022-01-10 07:14:39,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1780. [2022-01-10 07:14:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 1.4676784710511523) internal successors, (2611), 1779 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2611 transitions. [2022-01-10 07:14:39,828 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2611 transitions. Word has length 78 [2022-01-10 07:14:39,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:39,828 INFO L470 AbstractCegarLoop]: Abstraction has 1780 states and 2611 transitions. [2022-01-10 07:14:39,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:39,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2611 transitions. [2022-01-10 07:14:39,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 07:14:39,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:39,830 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:39,847 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 07:14:40,039 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 07:14:40,040 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:40,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1669185481, now seen corresponding path program 1 times [2022-01-10 07:14:40,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:40,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360195763] [2022-01-10 07:14:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:40,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:40,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:40,041 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 07:14:40,042 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 07:14:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:40,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:14:40,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:40,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:41,216 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:41,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360195763] [2022-01-10 07:14:41,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360195763] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:41,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:41,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:14:41,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554453105] [2022-01-10 07:14:41,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:41,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:41,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:41,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:41,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:41,217 INFO L87 Difference]: Start difference. First operand 1780 states and 2611 transitions. Second operand has 16 states, 16 states have (on average 8.5) internal successors, (136), 15 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:41,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:41,438 INFO L93 Difference]: Finished difference Result 3462 states and 5108 transitions. [2022-01-10 07:14:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 07:14:41,438 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.5) internal successors, (136), 15 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-10 07:14:41,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:41,444 INFO L225 Difference]: With dead ends: 3462 [2022-01-10 07:14:41,444 INFO L226 Difference]: Without dead ends: 1780 [2022-01-10 07:14:41,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-10 07:14:41,447 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 72 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:41,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 657 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2022-01-10 07:14:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2022-01-10 07:14:41,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1780. [2022-01-10 07:14:41,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 1.4671163575042159) internal successors, (2610), 1779 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:41,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2610 transitions. [2022-01-10 07:14:41,537 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2610 transitions. Word has length 78 [2022-01-10 07:14:41,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:41,537 INFO L470 AbstractCegarLoop]: Abstraction has 1780 states and 2610 transitions. [2022-01-10 07:14:41,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.5) internal successors, (136), 15 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:41,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2610 transitions. [2022-01-10 07:14:41,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 07:14:41,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:41,539 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:41,551 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 07:14:41,748 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 07:14:41,748 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:41,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:41,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1775560829, now seen corresponding path program 1 times [2022-01-10 07:14:41,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:41,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750842808] [2022-01-10 07:14:41,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:41,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:41,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:41,750 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 07:14:41,751 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 07:14:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:41,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:41,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 07:14:42,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:42,099 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:42,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750842808] [2022-01-10 07:14:42,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750842808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:42,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:42,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:42,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481429352] [2022-01-10 07:14:42,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:42,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:42,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:42,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:42,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:42,101 INFO L87 Difference]: Start difference. First operand 1780 states and 2610 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:42,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:42,210 INFO L93 Difference]: Finished difference Result 3492 states and 5143 transitions. [2022-01-10 07:14:42,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:42,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-10 07:14:42,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:42,217 INFO L225 Difference]: With dead ends: 3492 [2022-01-10 07:14:42,217 INFO L226 Difference]: Without dead ends: 1780 [2022-01-10 07:14:42,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:42,220 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 36 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:42,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 160 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2022-01-10 07:14:42,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2022-01-10 07:14:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1780. [2022-01-10 07:14:42,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 1.4665542439572794) internal successors, (2609), 1779 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2609 transitions. [2022-01-10 07:14:42,299 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2609 transitions. Word has length 78 [2022-01-10 07:14:42,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:42,299 INFO L470 AbstractCegarLoop]: Abstraction has 1780 states and 2609 transitions. [2022-01-10 07:14:42,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:42,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2609 transitions. [2022-01-10 07:14:42,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:14:42,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:42,301 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:42,310 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 07:14:42,510 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 07:14:42,511 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:42,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:42,511 INFO L85 PathProgramCache]: Analyzing trace with hash 77077229, now seen corresponding path program 1 times [2022-01-10 07:14:42,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:42,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253085013] [2022-01-10 07:14:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:42,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:42,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:42,513 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 07:14:42,515 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 07:14:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:42,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:14:42,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:43,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:43,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:43,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253085013] [2022-01-10 07:14:43,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253085013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:43,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:43,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:14:43,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658406135] [2022-01-10 07:14:43,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:43,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:43,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:43,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:43,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:43,930 INFO L87 Difference]: Start difference. First operand 1780 states and 2609 transitions. Second operand has 16 states, 16 states have (on average 9.25) internal successors, (148), 15 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:44,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:44,147 INFO L93 Difference]: Finished difference Result 3534 states and 5194 transitions. [2022-01-10 07:14:44,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:14:44,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.25) internal successors, (148), 15 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 07:14:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:44,153 INFO L225 Difference]: With dead ends: 3534 [2022-01-10 07:14:44,153 INFO L226 Difference]: Without dead ends: 1852 [2022-01-10 07:14:44,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-10 07:14:44,156 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 72 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:44,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 743 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 110 Invalid, 0 Unknown, 141 Unchecked, 0.1s Time] [2022-01-10 07:14:44,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-01-10 07:14:44,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1792. [2022-01-10 07:14:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 1.4667783361250697) internal successors, (2627), 1791 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:44,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2627 transitions. [2022-01-10 07:14:44,234 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2627 transitions. Word has length 79 [2022-01-10 07:14:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:44,234 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 2627 transitions. [2022-01-10 07:14:44,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.25) internal successors, (148), 15 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2627 transitions. [2022-01-10 07:14:44,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:14:44,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:44,235 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:44,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-01-10 07:14:44,445 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 07:14:44,445 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2092122104, now seen corresponding path program 1 times [2022-01-10 07:14:44,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:44,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940907722] [2022-01-10 07:14:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:44,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:44,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:44,447 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 07:14:44,449 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 07:14:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:44,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:44,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:44,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:44,666 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:44,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940907722] [2022-01-10 07:14:44,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940907722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:44,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:44,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:44,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050423708] [2022-01-10 07:14:44,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:44,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:44,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:44,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:44,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:44,668 INFO L87 Difference]: Start difference. First operand 1792 states and 2627 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:44,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:44,723 INFO L93 Difference]: Finished difference Result 2636 states and 3877 transitions. [2022-01-10 07:14:44,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:44,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 07:14:44,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:44,726 INFO L225 Difference]: With dead ends: 2636 [2022-01-10 07:14:44,726 INFO L226 Difference]: Without dead ends: 954 [2022-01-10 07:14:44,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 07:14:44,729 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 41 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:44,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 217 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:44,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-01-10 07:14:44,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 952. [2022-01-10 07:14:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 1.4353312302839116) internal successors, (1365), 951 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:44,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1365 transitions. [2022-01-10 07:14:44,770 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1365 transitions. Word has length 79 [2022-01-10 07:14:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:44,770 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 1365 transitions. [2022-01-10 07:14:44,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:44,770 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1365 transitions. [2022-01-10 07:14:44,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:14:44,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:44,771 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:44,782 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 07:14:44,980 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 07:14:44,980 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:44,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:44,981 INFO L85 PathProgramCache]: Analyzing trace with hash 345404908, now seen corresponding path program 1 times [2022-01-10 07:14:44,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:44,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986168517] [2022-01-10 07:14:44,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:44,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:44,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:44,982 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 07:14:44,983 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 07:14:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:45,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:45,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 07:14:45,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:45,168 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:45,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986168517] [2022-01-10 07:14:45,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986168517] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:45,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:45,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:45,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991920572] [2022-01-10 07:14:45,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:45,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:45,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:45,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:45,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:45,169 INFO L87 Difference]: Start difference. First operand 952 states and 1365 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:45,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:45,236 INFO L93 Difference]: Finished difference Result 1806 states and 2614 transitions. [2022-01-10 07:14:45,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:45,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 07:14:45,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:45,239 INFO L225 Difference]: With dead ends: 1806 [2022-01-10 07:14:45,240 INFO L226 Difference]: Without dead ends: 952 [2022-01-10 07:14:45,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 07:14:45,241 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 61 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:45,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 99 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-01-10 07:14:45,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 952. [2022-01-10 07:14:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 1.4206098843322819) internal successors, (1351), 951 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1351 transitions. [2022-01-10 07:14:45,280 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1351 transitions. Word has length 79 [2022-01-10 07:14:45,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:45,280 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 1351 transitions. [2022-01-10 07:14:45,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1351 transitions. [2022-01-10 07:14:45,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:14:45,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:45,281 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:45,291 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 07:14:45,489 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 07:14:45,490 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:45,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1169815228, now seen corresponding path program 1 times [2022-01-10 07:14:45,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:45,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121805696] [2022-01-10 07:14:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:45,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:45,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:45,492 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 07:14:45,494 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 07:14:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:45,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:45,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 07:14:45,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:45,662 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:45,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121805696] [2022-01-10 07:14:45,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121805696] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:45,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:45,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:45,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149304684] [2022-01-10 07:14:45,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:45,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:45,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:45,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:45,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:45,663 INFO L87 Difference]: Start difference. First operand 952 states and 1351 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:45,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:45,742 INFO L93 Difference]: Finished difference Result 1812 states and 2595 transitions. [2022-01-10 07:14:45,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:45,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 07:14:45,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:45,745 INFO L225 Difference]: With dead ends: 1812 [2022-01-10 07:14:45,745 INFO L226 Difference]: Without dead ends: 952 [2022-01-10 07:14:45,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 07:14:45,747 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 65 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:45,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 114 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:14:45,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-01-10 07:14:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 952. [2022-01-10 07:14:45,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 1.4058885383806519) internal successors, (1337), 951 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1337 transitions. [2022-01-10 07:14:45,789 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1337 transitions. Word has length 79 [2022-01-10 07:14:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:45,789 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 1337 transitions. [2022-01-10 07:14:45,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1337 transitions. [2022-01-10 07:14:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:14:45,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:45,790 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:45,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:45,999 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 07:14:45,999 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:45,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:46,000 INFO L85 PathProgramCache]: Analyzing trace with hash 275187192, now seen corresponding path program 1 times [2022-01-10 07:14:46,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:46,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661695553] [2022-01-10 07:14:46,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:46,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:46,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:46,001 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 07:14:46,003 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 07:14:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:46,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:46,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 07:14:46,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:46,186 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:46,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661695553] [2022-01-10 07:14:46,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661695553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:46,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:46,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:46,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170357136] [2022-01-10 07:14:46,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:46,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:46,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:46,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:46,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:46,188 INFO L87 Difference]: Start difference. First operand 952 states and 1337 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:46,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:46,294 INFO L93 Difference]: Finished difference Result 1818 states and 2576 transitions. [2022-01-10 07:14:46,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:46,295 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 07:14:46,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:46,301 INFO L225 Difference]: With dead ends: 1818 [2022-01-10 07:14:46,301 INFO L226 Difference]: Without dead ends: 952 [2022-01-10 07:14:46,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 07:14:46,305 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 69 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:46,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 129 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:14:46,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-01-10 07:14:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 952. [2022-01-10 07:14:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 1.391167192429022) internal successors, (1323), 951 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:46,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1323 transitions. [2022-01-10 07:14:46,371 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1323 transitions. Word has length 79 [2022-01-10 07:14:46,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:46,371 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 1323 transitions. [2022-01-10 07:14:46,371 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:46,372 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1323 transitions. [2022-01-10 07:14:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:14:46,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:46,373 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:46,383 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 07:14:46,582 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 07:14:46,582 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:46,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:46,583 INFO L85 PathProgramCache]: Analyzing trace with hash -2139768466, now seen corresponding path program 1 times [2022-01-10 07:14:46,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:46,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947341752] [2022-01-10 07:14:46,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:46,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:46,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:46,584 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 07:14:46,585 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 07:14:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:46,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:46,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 07:14:46,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:46,765 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:46,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947341752] [2022-01-10 07:14:46,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947341752] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:46,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:46,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:46,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128242414] [2022-01-10 07:14:46,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:46,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:46,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:46,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:46,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:46,767 INFO L87 Difference]: Start difference. First operand 952 states and 1323 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:46,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:46,842 INFO L93 Difference]: Finished difference Result 1794 states and 2524 transitions. [2022-01-10 07:14:46,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:46,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 07:14:46,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:46,845 INFO L225 Difference]: With dead ends: 1794 [2022-01-10 07:14:46,845 INFO L226 Difference]: Without dead ends: 922 [2022-01-10 07:14:46,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 07:14:46,846 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 67 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:46,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 133 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:46,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-01-10 07:14:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 922. [2022-01-10 07:14:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 1.3865363735070575) internal successors, (1277), 921 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1277 transitions. [2022-01-10 07:14:46,882 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1277 transitions. Word has length 79 [2022-01-10 07:14:46,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:46,882 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 1277 transitions. [2022-01-10 07:14:46,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:46,882 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1277 transitions. [2022-01-10 07:14:46,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 07:14:46,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:46,883 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:46,897 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 07:14:47,097 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 07:14:47,098 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:47,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1029207171, now seen corresponding path program 1 times [2022-01-10 07:14:47,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:47,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226502950] [2022-01-10 07:14:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:47,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:47,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:47,100 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 07:14:47,100 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 07:14:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:47,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:47,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:47,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:47,270 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:47,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226502950] [2022-01-10 07:14:47,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226502950] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:47,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:47,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:47,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864452723] [2022-01-10 07:14:47,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:47,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:47,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:47,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:47,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:47,271 INFO L87 Difference]: Start difference. First operand 922 states and 1277 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:47,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:47,294 INFO L93 Difference]: Finished difference Result 1346 states and 1873 transitions. [2022-01-10 07:14:47,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:47,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-01-10 07:14:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:47,296 INFO L225 Difference]: With dead ends: 1346 [2022-01-10 07:14:47,296 INFO L226 Difference]: Without dead ends: 504 [2022-01-10 07:14:47,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 78 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 07:14:47,297 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 33 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:47,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 196 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:47,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-10 07:14:47,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 502. [2022-01-10 07:14:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 1.347305389221557) internal successors, (675), 501 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 675 transitions. [2022-01-10 07:14:47,322 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 675 transitions. Word has length 80 [2022-01-10 07:14:47,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:47,322 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 675 transitions. [2022-01-10 07:14:47,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 675 transitions. [2022-01-10 07:14:47,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 07:14:47,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:47,323 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:47,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-01-10 07:14:47,527 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 07:14:47,527 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:47,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:47,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1525555096, now seen corresponding path program 1 times [2022-01-10 07:14:47,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:47,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33210856] [2022-01-10 07:14:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:47,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:47,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:47,529 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 07:14:47,529 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 07:14:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:47,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:14:47,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:48,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:48,788 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:48,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33210856] [2022-01-10 07:14:48,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33210856] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:48,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:48,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:14:48,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678428957] [2022-01-10 07:14:48,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:48,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:48,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:48,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:48,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:48,790 INFO L87 Difference]: Start difference. First operand 502 states and 675 transitions. Second operand has 16 states, 16 states have (on average 9.625) internal successors, (154), 15 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:48,921 INFO L93 Difference]: Finished difference Result 938 states and 1288 transitions. [2022-01-10 07:14:48,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 07:14:48,923 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.625) internal successors, (154), 15 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-01-10 07:14:48,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:48,925 INFO L225 Difference]: With dead ends: 938 [2022-01-10 07:14:48,925 INFO L226 Difference]: Without dead ends: 516 [2022-01-10 07:14:48,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-10 07:14:48,926 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 88 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:48,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 703 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 65 Unchecked, 0.0s Time] [2022-01-10 07:14:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-01-10 07:14:48,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 514. [2022-01-10 07:14:48,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 1.3508771929824561) internal successors, (693), 513 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:48,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 693 transitions. [2022-01-10 07:14:48,947 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 693 transitions. Word has length 80 [2022-01-10 07:14:48,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:48,947 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 693 transitions. [2022-01-10 07:14:48,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.625) internal successors, (154), 15 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:48,947 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 693 transitions. [2022-01-10 07:14:48,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 07:14:48,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:48,948 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:48,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-01-10 07:14:49,148 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 07:14:49,149 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:49,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1435628897, now seen corresponding path program 1 times [2022-01-10 07:14:49,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:49,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578633268] [2022-01-10 07:14:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:49,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:49,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:49,151 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 07:14:49,151 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 07:14:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:49,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:49,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:49,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:49,319 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:49,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578633268] [2022-01-10 07:14:49,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578633268] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:49,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:49,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:49,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012088163] [2022-01-10 07:14:49,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:49,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:49,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:49,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:49,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:49,320 INFO L87 Difference]: Start difference. First operand 514 states and 693 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:49,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:49,337 INFO L93 Difference]: Finished difference Result 728 states and 989 transitions. [2022-01-10 07:14:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:49,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 07:14:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:49,338 INFO L225 Difference]: With dead ends: 728 [2022-01-10 07:14:49,338 INFO L226 Difference]: Without dead ends: 306 [2022-01-10 07:14:49,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 79 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 07:14:49,339 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 27 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:49,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 179 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:49,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-01-10 07:14:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2022-01-10 07:14:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.3003300330033003) internal successors, (394), 303 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 394 transitions. [2022-01-10 07:14:49,351 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 394 transitions. Word has length 81 [2022-01-10 07:14:49,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:49,351 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 394 transitions. [2022-01-10 07:14:49,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:49,351 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 394 transitions. [2022-01-10 07:14:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 07:14:49,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:49,352 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:49,359 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 07:14:49,552 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 07:14:49,553 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:49,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:49,553 INFO L85 PathProgramCache]: Analyzing trace with hash -600488060, now seen corresponding path program 1 times [2022-01-10 07:14:49,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:49,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687970471] [2022-01-10 07:14:49,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:49,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:49,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:49,555 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 07:14:49,556 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 07:14:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:49,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:14:49,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:14:50,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:50,106 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:50,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687970471] [2022-01-10 07:14:50,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687970471] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:50,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:50,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 07:14:50,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776971052] [2022-01-10 07:14:50,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:50,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:14:50,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:50,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:14:50,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:50,107 INFO L87 Difference]: Start difference. First operand 304 states and 394 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:50,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:50,234 INFO L93 Difference]: Finished difference Result 678 states and 904 transitions. [2022-01-10 07:14:50,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:50,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 07:14:50,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:50,236 INFO L225 Difference]: With dead ends: 678 [2022-01-10 07:14:50,236 INFO L226 Difference]: Without dead ends: 606 [2022-01-10 07:14:50,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:50,237 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 320 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:50,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 551 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:14:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-01-10 07:14:50,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 454. [2022-01-10 07:14:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.3068432671081678) internal successors, (592), 453 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 592 transitions. [2022-01-10 07:14:50,263 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 592 transitions. Word has length 81 [2022-01-10 07:14:50,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:50,263 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 592 transitions. [2022-01-10 07:14:50,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:50,263 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 592 transitions. [2022-01-10 07:14:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 07:14:50,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:50,264 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:50,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:50,473 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 07:14:50,474 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:50,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1912479524, now seen corresponding path program 1 times [2022-01-10 07:14:50,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:50,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813928888] [2022-01-10 07:14:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:50,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:50,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:50,476 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 07:14:50,478 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 07:14:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:50,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:14:50,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 07:14:51,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:51,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:51,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813928888] [2022-01-10 07:14:51,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813928888] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:51,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:51,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 07:14:51,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489880674] [2022-01-10 07:14:51,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:51,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:14:51,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:51,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:14:51,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:51,021 INFO L87 Difference]: Start difference. First operand 454 states and 592 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:51,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:51,116 INFO L93 Difference]: Finished difference Result 758 states and 1009 transitions. [2022-01-10 07:14:51,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:51,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 07:14:51,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:51,118 INFO L225 Difference]: With dead ends: 758 [2022-01-10 07:14:51,118 INFO L226 Difference]: Without dead ends: 686 [2022-01-10 07:14:51,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:51,119 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 425 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:51,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 532 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:14:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-01-10 07:14:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 528. [2022-01-10 07:14:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 1.3074003795066413) internal successors, (689), 527 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:51,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 689 transitions. [2022-01-10 07:14:51,156 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 689 transitions. Word has length 81 [2022-01-10 07:14:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:51,156 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 689 transitions. [2022-01-10 07:14:51,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 689 transitions. [2022-01-10 07:14:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 07:14:51,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:51,157 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:51,166 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 07:14:51,365 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 07:14:51,366 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:51,366 INFO L85 PathProgramCache]: Analyzing trace with hash 633625351, now seen corresponding path program 1 times [2022-01-10 07:14:51,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:51,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448793922] [2022-01-10 07:14:51,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:51,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:51,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:51,367 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 07:14:51,368 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 07:14:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:51,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:14:51,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 07:14:51,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:51,910 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:51,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448793922] [2022-01-10 07:14:51,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448793922] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:51,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:51,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 07:14:51,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408897405] [2022-01-10 07:14:51,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:51,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:14:51,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:51,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:14:51,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:51,912 INFO L87 Difference]: Start difference. First operand 528 states and 689 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:52,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:52,005 INFO L93 Difference]: Finished difference Result 828 states and 1102 transitions. [2022-01-10 07:14:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:52,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 07:14:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:52,007 INFO L225 Difference]: With dead ends: 828 [2022-01-10 07:14:52,007 INFO L226 Difference]: Without dead ends: 616 [2022-01-10 07:14:52,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:52,008 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 329 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:52,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 531 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:14:52,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-10 07:14:52,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 458. [2022-01-10 07:14:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.2910284463894968) internal successors, (590), 457 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:52,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 590 transitions. [2022-01-10 07:14:52,035 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 590 transitions. Word has length 81 [2022-01-10 07:14:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:52,035 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 590 transitions. [2022-01-10 07:14:52,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 590 transitions. [2022-01-10 07:14:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 07:14:52,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:52,037 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:52,047 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 07:14:52,246 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 07:14:52,246 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:52,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:52,246 INFO L85 PathProgramCache]: Analyzing trace with hash 600336039, now seen corresponding path program 1 times [2022-01-10 07:14:52,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:52,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523744374] [2022-01-10 07:14:52,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:52,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:52,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:52,248 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 07:14:52,248 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 07:14:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:52,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:14:52,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 07:14:52,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:52,775 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:52,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523744374] [2022-01-10 07:14:52,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523744374] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:52,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:52,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 07:14:52,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117964320] [2022-01-10 07:14:52,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:52,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:14:52,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:52,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:14:52,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:52,776 INFO L87 Difference]: Start difference. First operand 458 states and 590 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:52,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:52,905 INFO L93 Difference]: Finished difference Result 762 states and 1007 transitions. [2022-01-10 07:14:52,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:52,905 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 07:14:52,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:52,906 INFO L225 Difference]: With dead ends: 762 [2022-01-10 07:14:52,906 INFO L226 Difference]: Without dead ends: 690 [2022-01-10 07:14:52,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:52,907 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 349 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:52,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 656 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:14:52,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-01-10 07:14:52,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 538. [2022-01-10 07:14:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.2942271880819367) internal successors, (695), 537 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:52,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 695 transitions. [2022-01-10 07:14:52,941 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 695 transitions. Word has length 81 [2022-01-10 07:14:52,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:52,941 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 695 transitions. [2022-01-10 07:14:52,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:52,941 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 695 transitions. [2022-01-10 07:14:52,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 07:14:52,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:52,942 INFO L514 BasicCegarLoop]: trace histogram [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 07:14:52,953 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 07:14:53,151 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 07:14:53,151 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:53,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:53,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1110890325, now seen corresponding path program 1 times [2022-01-10 07:14:53,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:53,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398162951] [2022-01-10 07:14:53,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:53,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:53,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:53,153 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 07:14:53,154 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 07:14:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:53,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:14:53,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:53,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:54,039 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:54,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398162951] [2022-01-10 07:14:54,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398162951] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:54,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:54,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-01-10 07:14:54,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145271576] [2022-01-10 07:14:54,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:54,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:54,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:54,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:54,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:54,040 INFO L87 Difference]: Start difference. First operand 538 states and 695 transitions. Second operand has 16 states, 16 states have (on average 8.6875) internal successors, (139), 16 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:54,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:54,141 INFO L93 Difference]: Finished difference Result 684 states and 892 transitions. [2022-01-10 07:14:54,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 07:14:54,141 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 16 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-01-10 07:14:54,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:54,142 INFO L225 Difference]: With dead ends: 684 [2022-01-10 07:14:54,142 INFO L226 Difference]: Without dead ends: 516 [2022-01-10 07:14:54,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-01-10 07:14:54,142 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 56 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:54,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 834 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-01-10 07:14:54,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-01-10 07:14:54,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2022-01-10 07:14:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.2932038834951456) internal successors, (666), 515 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:54,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 666 transitions. [2022-01-10 07:14:54,170 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 666 transitions. Word has length 82 [2022-01-10 07:14:54,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:54,170 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 666 transitions. [2022-01-10 07:14:54,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 16 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 666 transitions. [2022-01-10 07:14:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 07:14:54,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:54,171 INFO L514 BasicCegarLoop]: trace histogram [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 07:14:54,180 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 07:14:54,380 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 07:14:54,380 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:54,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:54,381 INFO L85 PathProgramCache]: Analyzing trace with hash 424619928, now seen corresponding path program 1 times [2022-01-10 07:14:54,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:54,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778040964] [2022-01-10 07:14:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:54,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:54,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:54,382 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 07:14:54,383 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 07:14:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:54,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-10 07:14:54,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:58,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:00,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:00,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778040964] [2022-01-10 07:15:00,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778040964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:00,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:00,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 49 [2022-01-10 07:15:00,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792003138] [2022-01-10 07:15:00,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:00,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-10 07:15:00,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:00,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-10 07:15:00,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2020, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 07:15:00,134 INFO L87 Difference]: Start difference. First operand 516 states and 666 transitions. Second operand has 49 states, 49 states have (on average 3.163265306122449) internal successors, (155), 49 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:00,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:00,623 INFO L93 Difference]: Finished difference Result 861 states and 1103 transitions. [2022-01-10 07:15:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-10 07:15:00,623 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.163265306122449) internal successors, (155), 49 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-01-10 07:15:00,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:00,624 INFO L225 Difference]: With dead ends: 861 [2022-01-10 07:15:00,624 INFO L226 Difference]: Without dead ends: 715 [2022-01-10 07:15:00,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2022-01-10 07:15:00,626 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 208 mSDsluCounter, 1688 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:00,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 1784 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 287 Invalid, 0 Unknown, 259 Unchecked, 0.3s Time] [2022-01-10 07:15:00,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-01-10 07:15:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 527. [2022-01-10 07:15:00,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 1.290874524714829) internal successors, (679), 526 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 679 transitions. [2022-01-10 07:15:00,663 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 679 transitions. Word has length 82 [2022-01-10 07:15:00,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:00,663 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 679 transitions. [2022-01-10 07:15:00,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.163265306122449) internal successors, (155), 49 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:00,663 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 679 transitions. [2022-01-10 07:15:00,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 07:15:00,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:00,664 INFO L514 BasicCegarLoop]: trace histogram [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 07:15:00,675 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 07:15:00,873 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 07:15:00,873 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:00,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:00,873 INFO L85 PathProgramCache]: Analyzing trace with hash -318268270, now seen corresponding path program 1 times [2022-01-10 07:15:00,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:00,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474891808] [2022-01-10 07:15:00,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:00,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:00,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:00,875 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 07:15:00,876 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 07:15:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:00,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 07:15:00,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:02,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:03,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:03,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474891808] [2022-01-10 07:15:03,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474891808] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:03,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:03,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-01-10 07:15:03,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358377628] [2022-01-10 07:15:03,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:03,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 07:15:03,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:03,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 07:15:03,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-01-10 07:15:03,659 INFO L87 Difference]: Start difference. First operand 527 states and 679 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:03,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:03,877 INFO L93 Difference]: Finished difference Result 851 states and 1104 transitions. [2022-01-10 07:15:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 07:15:03,877 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-01-10 07:15:03,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:03,878 INFO L225 Difference]: With dead ends: 851 [2022-01-10 07:15:03,878 INFO L226 Difference]: Without dead ends: 695 [2022-01-10 07:15:03,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2022-01-10 07:15:03,880 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 145 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:03,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1112 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 178 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-01-10 07:15:03,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-01-10 07:15:03,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 513. [2022-01-10 07:15:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.29296875) internal successors, (662), 512 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 662 transitions. [2022-01-10 07:15:03,911 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 662 transitions. Word has length 82 [2022-01-10 07:15:03,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:03,911 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 662 transitions. [2022-01-10 07:15:03,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 662 transitions. [2022-01-10 07:15:03,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 07:15:03,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:03,912 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:15:03,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-01-10 07:15:04,121 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 07:15:04,122 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:04,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1211145029, now seen corresponding path program 1 times [2022-01-10 07:15:04,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:04,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994836628] [2022-01-10 07:15:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:04,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:04,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:04,123 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 07:15:04,124 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 07:15:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:04,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 07:15:04,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:06,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:06,838 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:06,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994836628] [2022-01-10 07:15:06,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994836628] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:06,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:06,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-01-10 07:15:06,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104228119] [2022-01-10 07:15:06,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:06,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 07:15:06,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:06,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 07:15:06,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-01-10 07:15:06,841 INFO L87 Difference]: Start difference. First operand 513 states and 662 transitions. Second operand has 29 states, 29 states have (on average 5.275862068965517) internal successors, (153), 29 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:07,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:07,068 INFO L93 Difference]: Finished difference Result 837 states and 1075 transitions. [2022-01-10 07:15:07,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 07:15:07,068 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.275862068965517) internal successors, (153), 29 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-01-10 07:15:07,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:07,069 INFO L225 Difference]: With dead ends: 837 [2022-01-10 07:15:07,069 INFO L226 Difference]: Without dead ends: 691 [2022-01-10 07:15:07,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2022-01-10 07:15:07,070 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 170 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:07,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1382 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 235 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2022-01-10 07:15:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-01-10 07:15:07,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 498. [2022-01-10 07:15:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 1.295774647887324) internal successors, (644), 497 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 644 transitions. [2022-01-10 07:15:07,098 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 644 transitions. Word has length 83 [2022-01-10 07:15:07,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:07,099 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 644 transitions. [2022-01-10 07:15:07,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.275862068965517) internal successors, (153), 29 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:07,099 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 644 transitions. [2022-01-10 07:15:07,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 07:15:07,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:07,099 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:15:07,110 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 07:15:07,307 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 07:15:07,307 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:07,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:07,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1869039169, now seen corresponding path program 1 times [2022-01-10 07:15:07,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:07,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130171194] [2022-01-10 07:15:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:07,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:07,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:07,309 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 07:15:07,310 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 07:15:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:07,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:15:07,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:15:07,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:15:07,736 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:07,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130171194] [2022-01-10 07:15:07,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130171194] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:07,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:07,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 07:15:07,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547660117] [2022-01-10 07:15:07,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:07,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:15:07,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:07,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:15:07,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:15:07,738 INFO L87 Difference]: Start difference. First operand 498 states and 644 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:07,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:07,811 INFO L93 Difference]: Finished difference Result 1164 states and 1538 transitions. [2022-01-10 07:15:07,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:15:07,811 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-01-10 07:15:07,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:07,812 INFO L225 Difference]: With dead ends: 1164 [2022-01-10 07:15:07,812 INFO L226 Difference]: Without dead ends: 742 [2022-01-10 07:15:07,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 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 07:15:07,813 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 126 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:07,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 577 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2022-01-10 07:15:07,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-01-10 07:15:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 738. [2022-01-10 07:15:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 1.3039348710990502) internal successors, (961), 737 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 961 transitions. [2022-01-10 07:15:07,856 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 961 transitions. Word has length 83 [2022-01-10 07:15:07,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:07,856 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 961 transitions. [2022-01-10 07:15:07,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 961 transitions. [2022-01-10 07:15:07,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 07:15:07,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:07,857 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:15:07,867 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 07:15:08,066 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 07:15:08,066 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:08,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1872213086, now seen corresponding path program 1 times [2022-01-10 07:15:08,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:08,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032352970] [2022-01-10 07:15:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:08,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:08,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:08,068 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 07:15:08,069 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 07:15:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:08,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-10 07:15:08,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:14,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:19,345 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:19,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032352970] [2022-01-10 07:15:19,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032352970] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:19,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:19,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 47 [2022-01-10 07:15:19,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610075541] [2022-01-10 07:15:19,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:19,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-10 07:15:19,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:19,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-10 07:15:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2022-01-10 07:15:19,347 INFO L87 Difference]: Start difference. First operand 738 states and 961 transitions. Second operand has 47 states, 47 states have (on average 3.297872340425532) internal successors, (155), 47 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:20,332 INFO L93 Difference]: Finished difference Result 1042 states and 1357 transitions. [2022-01-10 07:15:20,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-10 07:15:20,332 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.297872340425532) internal successors, (155), 47 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-01-10 07:15:20,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:20,333 INFO L225 Difference]: With dead ends: 1042 [2022-01-10 07:15:20,333 INFO L226 Difference]: Without dead ends: 778 [2022-01-10 07:15:20,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=306, Invalid=2046, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 07:15:20,334 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 170 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:20,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1385 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 446 Invalid, 0 Unknown, 184 Unchecked, 0.4s Time] [2022-01-10 07:15:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-01-10 07:15:20,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 754. [2022-01-10 07:15:20,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 1.301460823373174) internal successors, (980), 753 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:20,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 980 transitions. [2022-01-10 07:15:20,374 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 980 transitions. Word has length 83 [2022-01-10 07:15:20,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:20,374 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 980 transitions. [2022-01-10 07:15:20,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.297872340425532) internal successors, (155), 47 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:20,374 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 980 transitions. [2022-01-10 07:15:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 07:15:20,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:20,375 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:15:20,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-01-10 07:15:20,576 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 07:15:20,576 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:20,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:20,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1035228565, now seen corresponding path program 1 times [2022-01-10 07:15:20,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:20,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1867024793] [2022-01-10 07:15:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:20,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:20,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:20,578 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 07:15:20,578 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 07:15:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:20,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:15:20,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:21,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:21,875 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:21,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1867024793] [2022-01-10 07:15:21,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1867024793] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:21,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:21,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-01-10 07:15:21,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727891362] [2022-01-10 07:15:21,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:21,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 07:15:21,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:21,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 07:15:21,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-10 07:15:21,877 INFO L87 Difference]: Start difference. First operand 754 states and 980 transitions. Second operand has 17 states, 17 states have (on average 8.764705882352942) internal successors, (149), 17 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:21,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:21,997 INFO L93 Difference]: Finished difference Result 950 states and 1241 transitions. [2022-01-10 07:15:21,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 07:15:21,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.764705882352942) internal successors, (149), 17 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-01-10 07:15:21,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:21,999 INFO L225 Difference]: With dead ends: 950 [2022-01-10 07:15:21,999 INFO L226 Difference]: Without dead ends: 686 [2022-01-10 07:15:22,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:15:22,001 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 49 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:22,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 984 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 68 Unchecked, 0.0s Time] [2022-01-10 07:15:22,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-01-10 07:15:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 670. [2022-01-10 07:15:22,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 1.2989536621823616) internal successors, (869), 669 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:22,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 869 transitions. [2022-01-10 07:15:22,061 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 869 transitions. Word has length 84 [2022-01-10 07:15:22,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:22,062 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 869 transitions. [2022-01-10 07:15:22,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.764705882352942) internal successors, (149), 17 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:22,062 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 869 transitions. [2022-01-10 07:15:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 07:15:22,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:22,062 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:15:22,077 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 07:15:22,272 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 07:15:22,272 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:22,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:22,273 INFO L85 PathProgramCache]: Analyzing trace with hash 521660621, now seen corresponding path program 1 times [2022-01-10 07:15:22,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:22,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89477956] [2022-01-10 07:15:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:22,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:22,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:22,274 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 07:15:22,275 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 07:15:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:22,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:15:22,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:15:22,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:15:22,690 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:22,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89477956] [2022-01-10 07:15:22,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89477956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:22,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:22,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 07:15:22,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659071593] [2022-01-10 07:15:22,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:22,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:15:22,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:22,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:15:22,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:15:22,691 INFO L87 Difference]: Start difference. First operand 670 states and 869 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:22,774 INFO L93 Difference]: Finished difference Result 1416 states and 1846 transitions. [2022-01-10 07:15:22,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 07:15:22,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-01-10 07:15:22,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:22,776 INFO L225 Difference]: With dead ends: 1416 [2022-01-10 07:15:22,776 INFO L226 Difference]: Without dead ends: 994 [2022-01-10 07:15:22,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:15:22,777 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 135 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:22,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 422 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 28 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-01-10 07:15:22,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-01-10 07:15:22,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 851. [2022-01-10 07:15:22,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.2588235294117647) internal successors, (1070), 850 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1070 transitions. [2022-01-10 07:15:22,828 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1070 transitions. Word has length 84 [2022-01-10 07:15:22,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:22,828 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1070 transitions. [2022-01-10 07:15:22,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:22,828 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1070 transitions. [2022-01-10 07:15:22,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 07:15:22,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:22,829 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 07:15:22,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-01-10 07:15:23,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:23,030 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:23,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:23,031 INFO L85 PathProgramCache]: Analyzing trace with hash 499006495, now seen corresponding path program 1 times [2022-01-10 07:15:23,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:23,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496789193] [2022-01-10 07:15:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:23,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:23,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:23,032 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:23,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 07:15:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:23,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:15:23,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:24,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:24,598 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:24,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496789193] [2022-01-10 07:15:24,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496789193] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:24,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:24,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 07:15:24,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193425768] [2022-01-10 07:15:24,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:24,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 07:15:24,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:24,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 07:15:24,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:15:24,599 INFO L87 Difference]: Start difference. First operand 851 states and 1070 transitions. Second operand has 18 states, 18 states have (on average 11.11111111111111) internal successors, (200), 17 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:24,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:24,753 INFO L93 Difference]: Finished difference Result 1634 states and 2070 transitions. [2022-01-10 07:15:24,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:15:24,753 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 11.11111111111111) internal successors, (200), 17 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-01-10 07:15:24,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:24,754 INFO L225 Difference]: With dead ends: 1634 [2022-01-10 07:15:24,754 INFO L226 Difference]: Without dead ends: 879 [2022-01-10 07:15:24,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-10 07:15:24,755 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 130 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:24,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 741 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 78 Unchecked, 0.0s Time] [2022-01-10 07:15:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-01-10 07:15:24,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2022-01-10 07:15:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 1.253986332574032) internal successors, (1101), 878 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1101 transitions. [2022-01-10 07:15:24,808 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1101 transitions. Word has length 110 [2022-01-10 07:15:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:24,808 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 1101 transitions. [2022-01-10 07:15:24,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.11111111111111) internal successors, (200), 17 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:24,808 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1101 transitions. [2022-01-10 07:15:24,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 07:15:24,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:24,809 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 07:15:24,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-01-10 07:15:25,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:25,009 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:25,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:25,010 INFO L85 PathProgramCache]: Analyzing trace with hash 627091802, now seen corresponding path program 1 times [2022-01-10 07:15:25,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:25,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537148431] [2022-01-10 07:15:25,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:25,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:25,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:25,011 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 07:15:25,012 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 07:15:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:25,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:15:25,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:26,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:26,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:26,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537148431] [2022-01-10 07:15:26,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537148431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:26,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:26,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 07:15:26,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597847029] [2022-01-10 07:15:26,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:26,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 07:15:26,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:26,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 07:15:26,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:15:26,548 INFO L87 Difference]: Start difference. First operand 879 states and 1101 transitions. Second operand has 18 states, 18 states have (on average 11.38888888888889) internal successors, (205), 17 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:26,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:26,767 INFO L93 Difference]: Finished difference Result 1677 states and 2117 transitions. [2022-01-10 07:15:26,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:15:26,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 11.38888888888889) internal successors, (205), 17 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-01-10 07:15:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:26,769 INFO L225 Difference]: With dead ends: 1677 [2022-01-10 07:15:26,769 INFO L226 Difference]: Without dead ends: 928 [2022-01-10 07:15:26,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-10 07:15:26,770 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 71 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:26,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1053 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 122 Unchecked, 0.1s Time] [2022-01-10 07:15:26,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-01-10 07:15:26,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-01-10 07:15:26,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.2459546925566343) internal successors, (1155), 927 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1155 transitions. [2022-01-10 07:15:26,825 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1155 transitions. Word has length 110 [2022-01-10 07:15:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:26,826 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 1155 transitions. [2022-01-10 07:15:26,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.38888888888889) internal successors, (205), 17 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:26,826 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1155 transitions. [2022-01-10 07:15:26,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 07:15:26,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:26,827 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:15:26,834 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 07:15:27,028 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 07:15:27,029 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:27,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1492624191, now seen corresponding path program 1 times [2022-01-10 07:15:27,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:27,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478981676] [2022-01-10 07:15:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:27,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:27,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:27,031 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 07:15:27,031 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 07:15:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:27,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:15:27,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:28,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:28,643 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:28,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478981676] [2022-01-10 07:15:28,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478981676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:28,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:28,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 07:15:28,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819366748] [2022-01-10 07:15:28,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:28,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 07:15:28,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:28,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 07:15:28,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:15:28,645 INFO L87 Difference]: Start difference. First operand 928 states and 1155 transitions. Second operand has 18 states, 18 states have (on average 11.666666666666666) internal successors, (210), 17 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:28,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:28,807 INFO L93 Difference]: Finished difference Result 1752 states and 2198 transitions. [2022-01-10 07:15:28,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:15:28,807 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 11.666666666666666) internal successors, (210), 17 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-01-10 07:15:28,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:28,808 INFO L225 Difference]: With dead ends: 1752 [2022-01-10 07:15:28,808 INFO L226 Difference]: Without dead ends: 1009 [2022-01-10 07:15:28,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-01-10 07:15:28,810 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 174 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:28,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 815 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 110 Unchecked, 0.0s Time] [2022-01-10 07:15:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-01-10 07:15:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 1009. [2022-01-10 07:15:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 1.2331349206349207) internal successors, (1243), 1008 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:28,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1243 transitions. [2022-01-10 07:15:28,879 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1243 transitions. Word has length 110 [2022-01-10 07:15:28,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:28,879 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1243 transitions. [2022-01-10 07:15:28,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.666666666666666) internal successors, (210), 17 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:28,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1243 transitions. [2022-01-10 07:15:28,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 07:15:28,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:28,880 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:15:28,887 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 07:15:29,080 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 07:15:29,081 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:29,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:29,081 INFO L85 PathProgramCache]: Analyzing trace with hash 963333690, now seen corresponding path program 2 times [2022-01-10 07:15:29,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:29,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964713552] [2022-01-10 07:15:29,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 07:15:29,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:29,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:29,083 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 07:15:29,084 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 07:15:29,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 07:15:29,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 07:15:29,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:15:29,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 07:15:29,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 07:15:29,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:29,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964713552] [2022-01-10 07:15:29,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964713552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:29,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:29,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 07:15:29,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551737133] [2022-01-10 07:15:29,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:29,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:15:29,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:29,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:15:29,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:15:29,640 INFO L87 Difference]: Start difference. First operand 1009 states and 1243 transitions. Second operand has 6 states, 6 states have (on average 33.666666666666664) internal successors, (202), 6 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:29,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:29,722 INFO L93 Difference]: Finished difference Result 1741 states and 2181 transitions. [2022-01-10 07:15:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:15:29,723 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 33.666666666666664) internal successors, (202), 6 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-01-10 07:15:29,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:29,724 INFO L225 Difference]: With dead ends: 1741 [2022-01-10 07:15:29,724 INFO L226 Difference]: Without dead ends: 1011 [2022-01-10 07:15:29,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 214 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 07:15:29,726 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 87 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:29,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 428 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2022-01-10 07:15:29,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-01-10 07:15:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 1002. [2022-01-10 07:15:29,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 1.2317682317682317) internal successors, (1233), 1001 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1233 transitions. [2022-01-10 07:15:29,798 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1233 transitions. Word has length 110 [2022-01-10 07:15:29,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:29,798 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 1233 transitions. [2022-01-10 07:15:29,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.666666666666664) internal successors, (202), 6 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:29,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1233 transitions. [2022-01-10 07:15:29,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-10 07:15:29,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:29,799 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:15:29,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-01-10 07:15:30,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:30,000 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:30,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:30,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1532696850, now seen corresponding path program 1 times [2022-01-10 07:15:30,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:30,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567862997] [2022-01-10 07:15:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:30,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:30,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:30,002 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:30,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-01-10 07:15:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:30,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:15:30,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 52 proven. 38 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 07:15:30,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 52 proven. 38 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 07:15:30,686 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:30,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567862997] [2022-01-10 07:15:30,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567862997] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:30,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:30,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 07:15:30,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650132196] [2022-01-10 07:15:30,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:30,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:15:30,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:30,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:15:30,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:15:30,688 INFO L87 Difference]: Start difference. First operand 1002 states and 1233 transitions. Second operand has 6 states, 6 states have (on average 37.5) internal successors, (225), 6 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:30,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:30,817 INFO L93 Difference]: Finished difference Result 1958 states and 2432 transitions. [2022-01-10 07:15:30,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:15:30,817 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 37.5) internal successors, (225), 6 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2022-01-10 07:15:30,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:30,819 INFO L225 Difference]: With dead ends: 1958 [2022-01-10 07:15:30,819 INFO L226 Difference]: Without dead ends: 1228 [2022-01-10 07:15:30,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 264 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 07:15:30,821 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 85 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:30,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 433 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2022-01-10 07:15:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-01-10 07:15:30,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1002. [2022-01-10 07:15:30,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 1.2307692307692308) internal successors, (1232), 1001 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:30,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1232 transitions. [2022-01-10 07:15:30,908 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1232 transitions. Word has length 135 [2022-01-10 07:15:30,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:30,909 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 1232 transitions. [2022-01-10 07:15:30,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 37.5) internal successors, (225), 6 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:30,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1232 transitions. [2022-01-10 07:15:30,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-10 07:15:30,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:30,910 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:15:30,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-01-10 07:15:31,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:31,110 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:31,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:31,111 INFO L85 PathProgramCache]: Analyzing trace with hash -768022410, now seen corresponding path program 1 times [2022-01-10 07:15:31,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:31,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605215941] [2022-01-10 07:15:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:31,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:31,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:31,112 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 07:15:31,113 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 07:15:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:31,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 07:15:31,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:32,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:33,218 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:33,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605215941] [2022-01-10 07:15:33,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605215941] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:33,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:33,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 07:15:33,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122717814] [2022-01-10 07:15:33,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:33,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 07:15:33,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:33,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 07:15:33,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 07:15:33,223 INFO L87 Difference]: Start difference. First operand 1002 states and 1232 transitions. Second operand has 26 states, 26 states have (on average 9.846153846153847) internal successors, (256), 25 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:33,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:33,461 INFO L93 Difference]: Finished difference Result 1912 states and 2358 transitions. [2022-01-10 07:15:33,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 07:15:33,462 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.846153846153847) internal successors, (256), 25 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-01-10 07:15:33,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:33,463 INFO L225 Difference]: With dead ends: 1912 [2022-01-10 07:15:33,463 INFO L226 Difference]: Without dead ends: 1226 [2022-01-10 07:15:33,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-01-10 07:15:33,464 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 159 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:33,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1511 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 131 Unchecked, 0.0s Time] [2022-01-10 07:15:33,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2022-01-10 07:15:33,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1226. [2022-01-10 07:15:33,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 1.2089795918367348) internal successors, (1481), 1225 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1481 transitions. [2022-01-10 07:15:33,554 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1481 transitions. Word has length 136 [2022-01-10 07:15:33,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:33,555 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 1481 transitions. [2022-01-10 07:15:33,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.846153846153847) internal successors, (256), 25 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1481 transitions. [2022-01-10 07:15:33,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-10 07:15:33,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:33,556 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:15:33,567 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 07:15:33,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:33,765 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:33,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:33,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1625923088, now seen corresponding path program 1 times [2022-01-10 07:15:33,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:33,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143813104] [2022-01-10 07:15:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:33,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:33,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:33,767 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:33,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-01-10 07:15:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:33,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 07:15:33,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:35,542 INFO L328 TraceCheckSpWp]: Computing backward predicates...