/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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:04:07,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:04:07,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:04:08,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:04:08,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:04:08,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:04:08,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:04:08,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:04:08,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:04:08,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:04:08,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:04:08,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:04:08,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:04:08,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:04:08,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:04:08,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:04:08,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:04:08,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:04:08,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:04:08,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:04:08,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:04:08,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:04:08,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:04:08,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:04:08,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 08:04:08,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:04:08,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:04:08,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:04:08,046 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 08:04:08,062 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:04:08,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:04:08,063 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:04:08,064 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:04:08,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 08:04:08,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 08:04:08,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:04:08,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:04:08,065 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:04:08,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:04:08,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:04:08,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:04:08,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:04:08,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:04:08,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:04:08,066 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:04:08,066 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:04:08,066 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:04:08,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:04:08,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:04:08,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:04:08,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:04:08,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:04:08,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:04:08,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:04:08,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:04:08,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:04:08,067 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 08:04:08,067 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 08:04:08,067 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:04:08,067 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:04:08,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:04:08,068 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:04:08,068 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:04:08,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:04:08,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:04:08,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:04:08,303 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:04:08,304 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:04:08,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c [2022-01-10 08:04:08,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa78c28a7/15e43f30d727463c9d43c039c778cc84/FLAG4af98dd86 [2022-01-10 08:04:08,970 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:04:08,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c [2022-01-10 08:04:08,994 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa78c28a7/15e43f30d727463c9d43c039c778cc84/FLAG4af98dd86 [2022-01-10 08:04:09,173 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa78c28a7/15e43f30d727463c9d43c039c778cc84 [2022-01-10 08:04:09,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:04:09,177 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 08:04:09,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:04:09,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:04:09,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:04:09,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:04:09" (1/1) ... [2022-01-10 08:04:09,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67d8b1c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:04:09, skipping insertion in model container [2022-01-10 08:04:09,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:04:09" (1/1) ... [2022-01-10 08:04:09,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:04:09,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:04:09,524 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c[8712,8725] [2022-01-10 08:04:09,588 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c[16002,16015] [2022-01-10 08:04:10,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:04:10,156 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:04:10,194 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c[8712,8725] [2022-01-10 08:04:10,204 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c[16002,16015] [2022-01-10 08:04:10,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:04:10,537 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:04:10,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:04:10 WrapperNode [2022-01-10 08:04:10,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:04:10,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:04:10,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:04:10,538 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:04:10,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:04:10" (1/1) ... [2022-01-10 08:04:10,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:04:10" (1/1) ... [2022-01-10 08:04:10,695 INFO L137 Inliner]: procedures = 37, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5010 [2022-01-10 08:04:10,696 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:04:10,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:04:10,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:04:10,697 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:04:10,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:04:10" (1/1) ... [2022-01-10 08:04:10,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:04:10" (1/1) ... [2022-01-10 08:04:10,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:04:10" (1/1) ... [2022-01-10 08:04:10,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:04:10" (1/1) ... [2022-01-10 08:04:10,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:04:10" (1/1) ... [2022-01-10 08:04:10,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:04:10" (1/1) ... [2022-01-10 08:04:10,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:04:10" (1/1) ... [2022-01-10 08:04:10,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:04:10,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:04:10,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:04:10,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:04:10,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:04:10" (1/1) ... [2022-01-10 08:04:10,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:04:10,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:04:10,910 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 08:04:10,915 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 08:04:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:04:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:04:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:04:10,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:04:11,004 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:04:11,005 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:04:33,844 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:04:33,854 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:04:33,855 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 08:04:33,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:04:33 BoogieIcfgContainer [2022-01-10 08:04:33,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:04:33,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:04:33,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:04:33,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:04:33,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:04:09" (1/3) ... [2022-01-10 08:04:33,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386b0908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:04:33, skipping insertion in model container [2022-01-10 08:04:33,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:04:10" (2/3) ... [2022-01-10 08:04:33,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386b0908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:04:33, skipping insertion in model container [2022-01-10 08:04:33,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:04:33" (3/3) ... [2022-01-10 08:04:33,862 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c [2022-01-10 08:04:33,868 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:04:33,868 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 08:04:33,905 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:04:33,910 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 08:04:33,911 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 08:04:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states 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 08:04:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 08:04:33,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:04:33,948 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] [2022-01-10 08:04:33,948 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:04:33,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:04:33,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2022-01-10 08:04:33,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:04:33,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133352085] [2022-01-10 08:04:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:04:33,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:04:33,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:04:33,964 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 08:04:33,967 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 08:04:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:04:34,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 08:04:34,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:04:34,173 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 08:04:34,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:04:34,174 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:04:34,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133352085] [2022-01-10 08:04:34,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133352085] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:04:34,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:04:34,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:04:34,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745805571] [2022-01-10 08:04:34,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:04:34,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 08:04:34,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:04:34,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 08:04:34,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 08:04:34,234 INFO L87 Difference]: Start difference. First operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 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 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 08:04:34,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:04:34,298 INFO L93 Difference]: Finished difference Result 1759 states and 3336 transitions. [2022-01-10 08:04:34,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 08:04:34,300 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-01-10 08:04:34,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:04:34,316 INFO L225 Difference]: With dead ends: 1759 [2022-01-10 08:04:34,317 INFO L226 Difference]: Without dead ends: 829 [2022-01-10 08:04:34,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 08:04:34,328 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:04:34,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:04:34,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-01-10 08:04:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2022-01-10 08:04:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.8899637243047158) internal successors, (1563), 828 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states 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 08:04:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1563 transitions. [2022-01-10 08:04:34,396 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1563 transitions. Word has length 30 [2022-01-10 08:04:34,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:04:34,397 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1563 transitions. [2022-01-10 08:04:34,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 08:04:34,397 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1563 transitions. [2022-01-10 08:04:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 08:04:34,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:04:34,398 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] [2022-01-10 08:04:34,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 08:04:34,604 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 08:04:34,605 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:04:34,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:04:34,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2022-01-10 08:04:34,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:04:34,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482658985] [2022-01-10 08:04:34,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:04:34,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:04:34,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:04:34,614 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 08:04:34,641 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 08:04:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:04:34,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:04:34,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:04:34,836 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 08:04:34,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:04:34,837 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:04:34,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482658985] [2022-01-10 08:04:34,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482658985] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:04:34,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:04:34,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:04:34,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174472711] [2022-01-10 08:04:34,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:04:34,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:04:34,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:04:34,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:04:34,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:04:34,839 INFO L87 Difference]: Start difference. First operand 829 states and 1563 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 08:04:34,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:04:34,940 INFO L93 Difference]: Finished difference Result 879 states and 1639 transitions. [2022-01-10 08:04:34,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:04:34,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-01-10 08:04:34,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:04:34,943 INFO L225 Difference]: With dead ends: 879 [2022-01-10 08:04:34,943 INFO L226 Difference]: Without dead ends: 829 [2022-01-10 08:04:34,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:04:34,944 INFO L933 BasicCegarLoop]: 1561 mSDtfsCounter, 3 mSDsluCounter, 4657 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6218 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:04:34,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6218 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:04:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-01-10 08:04:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2022-01-10 08:04:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.8621523579201935) internal successors, (1540), 828 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states 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 08:04:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1540 transitions. [2022-01-10 08:04:34,960 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1540 transitions. Word has length 30 [2022-01-10 08:04:34,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:04:34,962 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1540 transitions. [2022-01-10 08:04:34,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 08:04:34,966 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1540 transitions. [2022-01-10 08:04:34,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 08:04:34,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:04:34,971 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] [2022-01-10 08:04:34,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 08:04:35,176 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 08:04:35,177 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:04:35,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:04:35,179 INFO L85 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2022-01-10 08:04:35,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:04:35,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557948659] [2022-01-10 08:04:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:04:35,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:04:35,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:04:35,182 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 08:04:35,185 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 08:04:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:04:35,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:04:35,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:04:35,860 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 08:04:35,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:04:35,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:04:35,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557948659] [2022-01-10 08:04:35,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557948659] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:04:35,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:04:35,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:04:35,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412068650] [2022-01-10 08:04:35,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:04:35,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:04:35,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:04:35,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:04:35,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:04:35,865 INFO L87 Difference]: Start difference. First operand 829 states and 1540 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:04:35,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:04:35,999 INFO L93 Difference]: Finished difference Result 1059 states and 1900 transitions. [2022-01-10 08:04:36,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:04:36,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-01-10 08:04:36,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:04:36,005 INFO L225 Difference]: With dead ends: 1059 [2022-01-10 08:04:36,005 INFO L226 Difference]: Without dead ends: 1013 [2022-01-10 08:04:36,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 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 08:04:36,007 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 4802 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4802 SdHoareTripleChecker+Valid, 1813 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:04:36,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4802 Valid, 1813 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:04:36,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-01-10 08:04:36,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 917. [2022-01-10 08:04:36,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 915 states have (on average 1.8349726775956283) internal successors, (1679), 916 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states 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 08:04:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1679 transitions. [2022-01-10 08:04:36,027 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1679 transitions. Word has length 52 [2022-01-10 08:04:36,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:04:36,028 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 1679 transitions. [2022-01-10 08:04:36,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:04:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1679 transitions. [2022-01-10 08:04:36,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 08:04:36,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:04:36,030 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 08:04:36,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 08:04:36,237 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 08:04:36,237 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:04:36,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:04:36,238 INFO L85 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2022-01-10 08:04:36,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:04:36,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157178474] [2022-01-10 08:04:36,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:04:36,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:04:36,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:04:36,247 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 08:04:36,248 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 08:04:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:04:36,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:04:36,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:04:36,500 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 08:04:36,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:04:36,500 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:04:36,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157178474] [2022-01-10 08:04:36,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157178474] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:04:36,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:04:36,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:04:36,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335497048] [2022-01-10 08:04:36,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:04:36,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:04:36,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:04:36,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:04:36,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:04:36,502 INFO L87 Difference]: Start difference. First operand 917 states and 1679 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 08:04:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:04:36,547 INFO L93 Difference]: Finished difference Result 1169 states and 2073 transitions. [2022-01-10 08:04:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:04:36,547 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 08:04:36,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:04:36,550 INFO L225 Difference]: With dead ends: 1169 [2022-01-10 08:04:36,551 INFO L226 Difference]: Without dead ends: 1035 [2022-01-10 08:04:36,551 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 08:04:36,552 INFO L933 BasicCegarLoop]: 1536 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1601 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 08:04:36,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1601 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:04:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-01-10 08:04:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1030. [2022-01-10 08:04:36,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1028 states have (on average 1.7996108949416343) internal successors, (1850), 1029 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states 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 08:04:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 1850 transitions. [2022-01-10 08:04:36,568 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 1850 transitions. Word has length 54 [2022-01-10 08:04:36,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:04:36,568 INFO L470 AbstractCegarLoop]: Abstraction has 1030 states and 1850 transitions. [2022-01-10 08:04:36,568 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 08:04:36,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 1850 transitions. [2022-01-10 08:04:36,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 08:04:36,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:04:36,569 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 08:04:36,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 08:04:36,775 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 08:04:36,776 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:04:36,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:04:36,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2022-01-10 08:04:36,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:04:36,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059973432] [2022-01-10 08:04:36,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:04:36,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:04:36,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:04:36,778 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 08:04:36,779 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 08:04:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:04:36,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:04:36,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:04:36,936 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 08:04:36,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:04:36,936 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:04:36,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059973432] [2022-01-10 08:04:36,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059973432] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:04:36,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:04:36,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:04:36,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451987785] [2022-01-10 08:04:36,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:04:36,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:04:36,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:04:36,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:04:36,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:04:36,937 INFO L87 Difference]: Start difference. First operand 1030 states and 1850 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 08:04:36,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:04:36,965 INFO L93 Difference]: Finished difference Result 1488 states and 2554 transitions. [2022-01-10 08:04:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:04:36,966 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 08:04:36,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:04:36,970 INFO L225 Difference]: With dead ends: 1488 [2022-01-10 08:04:36,970 INFO L226 Difference]: Without dead ends: 1241 [2022-01-10 08:04:36,970 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 08:04:36,971 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1639 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 08:04:36,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1489 Valid, 1639 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:04:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2022-01-10 08:04:36,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1239. [2022-01-10 08:04:36,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1237 states have (on average 1.750202101859337) internal successors, (2165), 1238 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states 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 08:04:36,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 2165 transitions. [2022-01-10 08:04:36,990 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 2165 transitions. Word has length 54 [2022-01-10 08:04:36,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:04:36,991 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 2165 transitions. [2022-01-10 08:04:36,991 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 08:04:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 2165 transitions. [2022-01-10 08:04:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 08:04:36,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:04:36,991 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 08:04:37,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 08:04:37,197 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 08:04:37,198 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:04:37,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:04:37,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2022-01-10 08:04:37,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:04:37,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51759044] [2022-01-10 08:04:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:04:37,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:04:37,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:04:37,200 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 08:04:37,202 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 08:04:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:04:37,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:04:37,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:04:37,358 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 08:04:37,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:04:37,358 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:04:37,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51759044] [2022-01-10 08:04:37,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51759044] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:04:37,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:04:37,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:04:37,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445604558] [2022-01-10 08:04:37,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:04:37,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:04:37,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:04:37,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:04:37,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:04:37,360 INFO L87 Difference]: Start difference. First operand 1239 states and 2165 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 08:04:37,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:04:37,390 INFO L93 Difference]: Finished difference Result 2079 states and 3439 transitions. [2022-01-10 08:04:37,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:04:37,390 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 08:04:37,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:04:37,395 INFO L225 Difference]: With dead ends: 2079 [2022-01-10 08:04:37,395 INFO L226 Difference]: Without dead ends: 1623 [2022-01-10 08:04:37,396 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 08:04:37,396 INFO L933 BasicCegarLoop]: 1570 mSDtfsCounter, 1493 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 1648 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 08:04:37,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1493 Valid, 1648 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:04:37,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-01-10 08:04:37,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1621. [2022-01-10 08:04:37,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1619 states have (on average 1.6856084002470662) internal successors, (2729), 1620 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states 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 08:04:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2729 transitions. [2022-01-10 08:04:37,421 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2729 transitions. Word has length 54 [2022-01-10 08:04:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:04:37,421 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 2729 transitions. [2022-01-10 08:04:37,421 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 08:04:37,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2729 transitions. [2022-01-10 08:04:37,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 08:04:37,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:04:37,422 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 08:04:37,437 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 08:04:37,632 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 08:04:37,632 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:04:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:04:37,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2022-01-10 08:04:37,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:04:37,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187867773] [2022-01-10 08:04:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:04:37,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:04:37,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:04:37,637 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 08:04:37,673 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 08:04:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:04:37,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:04:37,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:04:37,785 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 08:04:37,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:04:37,786 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:04:37,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187867773] [2022-01-10 08:04:37,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187867773] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:04:37,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:04:37,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:04:37,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370353321] [2022-01-10 08:04:37,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:04:37,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:04:37,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:04:37,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:04:37,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:04:37,787 INFO L87 Difference]: Start difference. First operand 1621 states and 2729 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 08:04:37,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:04:37,822 INFO L93 Difference]: Finished difference Result 3153 states and 5011 transitions. [2022-01-10 08:04:37,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:04:37,823 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 08:04:37,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:04:37,829 INFO L225 Difference]: With dead ends: 3153 [2022-01-10 08:04:37,829 INFO L226 Difference]: Without dead ends: 2315 [2022-01-10 08:04:37,830 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 08:04:37,831 INFO L933 BasicCegarLoop]: 1583 mSDtfsCounter, 1497 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 1657 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 08:04:37,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1497 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:04:37,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-01-10 08:04:37,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2313. [2022-01-10 08:04:37,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2311 states have (on average 1.6118563392470793) internal successors, (3725), 2312 states have internal predecessors, (3725), 0 states have call successors, (0), 0 states 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 08:04:37,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3725 transitions. [2022-01-10 08:04:37,935 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3725 transitions. Word has length 54 [2022-01-10 08:04:37,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:04:37,935 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 3725 transitions. [2022-01-10 08:04:37,935 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 08:04:37,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3725 transitions. [2022-01-10 08:04:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-10 08:04:37,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:04:37,936 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, 1] [2022-01-10 08:04:37,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-01-10 08:04:38,146 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 08:04:38,147 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:04:38,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:04:38,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2022-01-10 08:04:38,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:04:38,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370301241] [2022-01-10 08:04:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:04:38,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:04:38,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:04:38,149 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 08:04:38,153 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 08:04:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:04:38,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:04:38,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:04:38,281 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 08:04:38,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:04:38,281 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:04:38,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370301241] [2022-01-10 08:04:38,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370301241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:04:38,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:04:38,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:04:38,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054614021] [2022-01-10 08:04:38,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:04:38,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:04:38,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:04:38,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:04:38,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:04:38,283 INFO L87 Difference]: Start difference. First operand 2313 states and 3725 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:04:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:04:38,404 INFO L93 Difference]: Finished difference Result 3588 states and 5556 transitions. [2022-01-10 08:04:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:04:38,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-01-10 08:04:38,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:04:38,414 INFO L225 Difference]: With dead ends: 3588 [2022-01-10 08:04:38,414 INFO L226 Difference]: Without dead ends: 3586 [2022-01-10 08:04:38,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 08:04:38,415 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 186 mSDsluCounter, 4622 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 6202 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:04:38,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 6202 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:04:38,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2022-01-10 08:04:38,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 2409. [2022-01-10 08:04:38,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2407 states have (on average 1.58412962193602) internal successors, (3813), 2408 states have internal predecessors, (3813), 0 states have call successors, (0), 0 states 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 08:04:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 3813 transitions. [2022-01-10 08:04:38,465 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 3813 transitions. Word has length 55 [2022-01-10 08:04:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:04:38,465 INFO L470 AbstractCegarLoop]: Abstraction has 2409 states and 3813 transitions. [2022-01-10 08:04:38,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:04:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 3813 transitions. [2022-01-10 08:04:38,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-10 08:04:38,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:04:38,466 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, 1, 1] [2022-01-10 08:04:38,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-01-10 08:04:38,671 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 08:04:38,672 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:04:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:04:38,672 INFO L85 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2022-01-10 08:04:38,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:04:38,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320833632] [2022-01-10 08:04:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:04:38,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:04:38,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:04:38,674 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 08:04:38,675 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 08:04:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:04:38,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:04:38,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:04:38,849 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 08:04:38,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:04:38,849 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:04:38,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320833632] [2022-01-10 08:04:38,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320833632] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:04:38,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:04:38,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:04:38,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758980664] [2022-01-10 08:04:38,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:04:38,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:04:38,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:04:38,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:04:38,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:04:38,850 INFO L87 Difference]: Start difference. First operand 2409 states and 3813 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:04:38,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:04:38,909 INFO L93 Difference]: Finished difference Result 4048 states and 6219 transitions. [2022-01-10 08:04:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:04:38,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-10 08:04:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:04:38,918 INFO L225 Difference]: With dead ends: 4048 [2022-01-10 08:04:38,918 INFO L226 Difference]: Without dead ends: 3133 [2022-01-10 08:04:38,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 54 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 08:04:38,920 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 1498 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1661 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 08:04:38,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1661 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:04:38,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3133 states. [2022-01-10 08:04:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3133 to 3131. [2022-01-10 08:04:38,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 3129 states have (on average 1.5452221156919144) internal successors, (4835), 3130 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states 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 08:04:38,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4835 transitions. [2022-01-10 08:04:38,983 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4835 transitions. Word has length 56 [2022-01-10 08:04:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:04:38,983 INFO L470 AbstractCegarLoop]: Abstraction has 3131 states and 4835 transitions. [2022-01-10 08:04:38,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:04:38,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4835 transitions. [2022-01-10 08:04:38,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 08:04:38,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:04:38,984 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:04:38,990 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 08:04:39,190 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 08:04:39,191 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:04:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:04:39,191 INFO L85 PathProgramCache]: Analyzing trace with hash 833889699, now seen corresponding path program 1 times [2022-01-10 08:04:39,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:04:39,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224718932] [2022-01-10 08:04:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:04:39,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:04:39,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:04:39,193 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 08:04:39,200 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 08:04:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:04:39,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:04:39,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:04:39,414 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 08:04:39,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:04:39,415 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:04:39,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224718932] [2022-01-10 08:04:39,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224718932] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:04:39,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:04:39,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:04:39,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295917235] [2022-01-10 08:04:39,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:04:39,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:04:39,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:04:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:04:39,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:04:39,416 INFO L87 Difference]: Start difference. First operand 3131 states and 4835 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:05:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:05:09,442 INFO L93 Difference]: Finished difference Result 4635 states and 7708 transitions. [2022-01-10 08:05:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:05:09,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 08:05:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:05:09,455 INFO L225 Difference]: With dead ends: 4635 [2022-01-10 08:05:09,463 INFO L226 Difference]: Without dead ends: 3882 [2022-01-10 08:05:09,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 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 08:05:09,467 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 839 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.8s IncrementalHoareTripleChecker+Time [2022-01-10 08:05:09,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 576 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 29.8s Time] [2022-01-10 08:05:09,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2022-01-10 08:05:09,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3882. [2022-01-10 08:05:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3882 states, 3880 states have (on average 1.4984536082474227) internal successors, (5814), 3881 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states 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 08:05:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3882 states to 3882 states and 5814 transitions. [2022-01-10 08:05:09,551 INFO L78 Accepts]: Start accepts. Automaton has 3882 states and 5814 transitions. Word has length 63 [2022-01-10 08:05:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:05:09,551 INFO L470 AbstractCegarLoop]: Abstraction has 3882 states and 5814 transitions. [2022-01-10 08:05:09,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:05:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3882 states and 5814 transitions. [2022-01-10 08:05:09,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 08:05:09,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:05:09,554 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:05:09,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-01-10 08:05:09,760 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 08:05:09,760 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:05:09,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:05:09,760 INFO L85 PathProgramCache]: Analyzing trace with hash 457839235, now seen corresponding path program 1 times [2022-01-10 08:05:09,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:05:09,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989428857] [2022-01-10 08:05:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:05:09,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:05:09,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:05:09,762 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 08:05:09,763 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 08:05:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:05:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:05:09,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:05:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:05:09,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:05:09,971 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:05:09,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989428857] [2022-01-10 08:05:09,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989428857] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:05:09,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:05:09,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:05:09,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289086475] [2022-01-10 08:05:09,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:05:10,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:05:10,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:05:10,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:05:10,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:05:10,008 INFO L87 Difference]: Start difference. First operand 3882 states and 5814 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 08:05:10,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:05:10,062 INFO L93 Difference]: Finished difference Result 5544 states and 8223 transitions. [2022-01-10 08:05:10,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:05:10,062 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 08:05:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:05:10,071 INFO L225 Difference]: With dead ends: 5544 [2022-01-10 08:05:10,071 INFO L226 Difference]: Without dead ends: 3198 [2022-01-10 08:05:10,074 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 08:05:10,075 INFO L933 BasicCegarLoop]: 1572 mSDtfsCounter, 45 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3096 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 08:05:10,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 3096 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:05:10,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2022-01-10 08:05:10,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 3196. [2022-01-10 08:05:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3196 states, 3194 states have (on average 1.5128365685660614) internal successors, (4832), 3195 states have internal predecessors, (4832), 0 states have call successors, (0), 0 states 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 08:05:10,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 4832 transitions. [2022-01-10 08:05:10,145 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 4832 transitions. Word has length 79 [2022-01-10 08:05:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:05:10,145 INFO L470 AbstractCegarLoop]: Abstraction has 3196 states and 4832 transitions. [2022-01-10 08:05:10,146 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 08:05:10,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 4832 transitions. [2022-01-10 08:05:10,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 08:05:10,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:05:10,149 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:05:10,164 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 08:05:10,365 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 08:05:10,365 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:05:10,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:05:10,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1280354104, now seen corresponding path program 1 times [2022-01-10 08:05:10,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:05:10,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777106856] [2022-01-10 08:05:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:05:10,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:05:10,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:05:10,367 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 08:05:10,369 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 08:05:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:05:10,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:05:10,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:05:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:05:11,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:05:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:05:11,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:05:11,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777106856] [2022-01-10 08:05:11,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777106856] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:05:11,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:05:11,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 08:05:11,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106022278] [2022-01-10 08:05:11,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:05:11,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 08:05:11,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:05:11,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 08:05:11,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 08:05:11,848 INFO L87 Difference]: Start difference. First operand 3196 states and 4832 transitions. Second operand has 16 states, 16 states have (on average 8.8125) internal successors, (141), 15 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 08:05:12,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:05:12,071 INFO L93 Difference]: Finished difference Result 4857 states and 7216 transitions. [2022-01-10 08:05:12,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 08:05:12,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.8125) internal successors, (141), 15 states have internal predecessors, (141), 0 states have call successors, (0), 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 08:05:12,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:05:12,094 INFO L225 Difference]: With dead ends: 4857 [2022-01-10 08:05:12,094 INFO L226 Difference]: Without dead ends: 3223 [2022-01-10 08:05:12,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-01-10 08:05:12,097 INFO L933 BasicCegarLoop]: 1522 mSDtfsCounter, 5864 mSDsluCounter, 10735 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5864 SdHoareTripleChecker+Valid, 12257 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:05:12,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5864 Valid, 12257 Invalid, 105 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 68 Unchecked, 0.0s Time] [2022-01-10 08:05:12,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2022-01-10 08:05:12,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3223. [2022-01-10 08:05:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 3221 states have (on average 1.5094691089723689) internal successors, (4862), 3222 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states 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 08:05:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 4862 transitions. [2022-01-10 08:05:12,155 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 4862 transitions. Word has length 81 [2022-01-10 08:05:12,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:05:12,155 INFO L470 AbstractCegarLoop]: Abstraction has 3223 states and 4862 transitions. [2022-01-10 08:05:12,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.8125) internal successors, (141), 15 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 08:05:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 4862 transitions. [2022-01-10 08:05:12,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 08:05:12,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:05:12,156 INFO L514 BasicCegarLoop]: trace histogram [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 08:05:12,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 08:05:12,364 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 08:05:12,364 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:05:12,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:05:12,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1706064798, now seen corresponding path program 1 times [2022-01-10 08:05:12,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:05:12,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540471755] [2022-01-10 08:05:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:05:12,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:05:12,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:05:12,366 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 08:05:12,367 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 08:05:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:05:12,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:05:12,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:05:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:05:12,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:05:12,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:05:12,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540471755] [2022-01-10 08:05:12,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540471755] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:05:12,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:05:12,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:05:12,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547978251] [2022-01-10 08:05:12,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:05:12,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:05:12,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:05:12,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:05:12,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:05:12,558 INFO L87 Difference]: Start difference. First operand 3223 states and 4862 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 08:05:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:05:12,598 INFO L93 Difference]: Finished difference Result 4043 states and 6040 transitions. [2022-01-10 08:05:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:05:12,598 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 08:05:12,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:05:12,602 INFO L225 Difference]: With dead ends: 4043 [2022-01-10 08:05:12,602 INFO L226 Difference]: Without dead ends: 2409 [2022-01-10 08:05:12,603 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 08:05:12,604 INFO L933 BasicCegarLoop]: 1565 mSDtfsCounter, 37 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3081 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 08:05:12,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 3081 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:05:12,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2022-01-10 08:05:12,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 2407. [2022-01-10 08:05:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 2405 states have (on average 1.5276507276507276) internal successors, (3674), 2406 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states 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 08:05:12,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 3674 transitions. [2022-01-10 08:05:12,637 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 3674 transitions. Word has length 81 [2022-01-10 08:05:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:05:12,637 INFO L470 AbstractCegarLoop]: Abstraction has 2407 states and 3674 transitions. [2022-01-10 08:05:12,637 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 08:05:12,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 3674 transitions. [2022-01-10 08:05:12,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 08:05:12,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:05:12,638 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:05:12,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-01-10 08:05:12,845 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 08:05:12,845 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:05:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:05:12,845 INFO L85 PathProgramCache]: Analyzing trace with hash -994617816, now seen corresponding path program 1 times [2022-01-10 08:05:12,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:05:12,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923622910] [2022-01-10 08:05:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:05:12,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:05:12,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:05:12,847 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 08:05:12,849 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 08:05:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:05:12,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:05:12,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:05:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:05:13,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:05:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:05:14,263 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:05:14,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923622910] [2022-01-10 08:05:14,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923622910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:05:14,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:05:14,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 08:05:14,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568187401] [2022-01-10 08:05:14,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:05:14,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 08:05:14,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:05:14,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 08:05:14,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 08:05:14,264 INFO L87 Difference]: Start difference. First operand 2407 states and 3674 transitions. Second operand has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 08:05:14,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:05:14,522 INFO L93 Difference]: Finished difference Result 3259 states and 4877 transitions. [2022-01-10 08:05:14,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 08:05:14,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 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 08:05:14,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:05:14,526 INFO L225 Difference]: With dead ends: 3259 [2022-01-10 08:05:14,526 INFO L226 Difference]: Without dead ends: 2441 [2022-01-10 08:05:14,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-10 08:05:14,528 INFO L933 BasicCegarLoop]: 1519 mSDtfsCounter, 5875 mSDsluCounter, 9162 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5875 SdHoareTripleChecker+Valid, 10681 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:05:14,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5875 Valid, 10681 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 94 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2022-01-10 08:05:14,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2022-01-10 08:05:14,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2417. [2022-01-10 08:05:14,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2415 states have (on average 1.5262939958592132) internal successors, (3686), 2416 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states 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 08:05:14,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 3686 transitions. [2022-01-10 08:05:14,564 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 3686 transitions. Word has length 81 [2022-01-10 08:05:14,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:05:14,564 INFO L470 AbstractCegarLoop]: Abstraction has 2417 states and 3686 transitions. [2022-01-10 08:05:14,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 08:05:14,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 3686 transitions. [2022-01-10 08:05:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 08:05:14,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:05:14,565 INFO L514 BasicCegarLoop]: trace histogram [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 08:05:14,574 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 08:05:14,772 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 08:05:14,772 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:05:14,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:05:14,772 INFO L85 PathProgramCache]: Analyzing trace with hash 900372746, now seen corresponding path program 1 times [2022-01-10 08:05:14,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:05:14,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231754256] [2022-01-10 08:05:14,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:05:14,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:05:14,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:05:14,774 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 08:05:14,787 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 08:05:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:05:14,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:05:14,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:05:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 08:05:15,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:05:15,199 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:05:15,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231754256] [2022-01-10 08:05:15,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231754256] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:05:15,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:05:15,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:05:15,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943601829] [2022-01-10 08:05:15,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:05:15,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:05:15,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:05:15,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:05:15,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:05:15,200 INFO L87 Difference]: Start difference. First operand 2417 states and 3686 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 5 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 08:05:15,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:05:15,261 INFO L93 Difference]: Finished difference Result 3248 states and 4864 transitions. [2022-01-10 08:05:15,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:05:15,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 5 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 08:05:15,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:05:15,264 INFO L225 Difference]: With dead ends: 3248 [2022-01-10 08:05:15,264 INFO L226 Difference]: Without dead ends: 2417 [2022-01-10 08:05:15,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:05:15,265 INFO L933 BasicCegarLoop]: 1526 mSDtfsCounter, 2907 mSDsluCounter, 2988 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2907 SdHoareTripleChecker+Valid, 4514 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:05:15,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2907 Valid, 4514 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-01-10 08:05:15,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2022-01-10 08:05:15,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2417. [2022-01-10 08:05:15,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2415 states have (on average 1.525879917184265) internal successors, (3685), 2416 states have internal predecessors, (3685), 0 states have call successors, (0), 0 states 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 08:05:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 3685 transitions. [2022-01-10 08:05:15,297 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 3685 transitions. Word has length 81 [2022-01-10 08:05:15,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:05:15,297 INFO L470 AbstractCegarLoop]: Abstraction has 2417 states and 3685 transitions. [2022-01-10 08:05:15,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 5 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 08:05:15,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 3685 transitions. [2022-01-10 08:05:15,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 08:05:15,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:05:15,298 INFO L514 BasicCegarLoop]: trace histogram [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 08:05:15,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 08:05:15,505 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 08:05:15,505 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:05:15,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:05:15,506 INFO L85 PathProgramCache]: Analyzing trace with hash 664487946, now seen corresponding path program 1 times [2022-01-10 08:05:15,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:05:15,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968703940] [2022-01-10 08:05:15,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:05:15,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:05:15,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:05:15,507 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 08:05:15,509 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 08:05:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:05:15,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:05:15,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:05:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 08:05:15,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:05:15,924 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:05:15,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968703940] [2022-01-10 08:05:15,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968703940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:05:15,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:05:15,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:05:15,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735756559] [2022-01-10 08:05:15,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:05:15,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:05:15,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:05:15,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:05:15,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:05:15,925 INFO L87 Difference]: Start difference. First operand 2417 states and 3685 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 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 08:05:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:05:16,002 INFO L93 Difference]: Finished difference Result 3252 states and 4868 transitions. [2022-01-10 08:05:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:05:16,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 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 81 [2022-01-10 08:05:16,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:05:16,006 INFO L225 Difference]: With dead ends: 3252 [2022-01-10 08:05:16,006 INFO L226 Difference]: Without dead ends: 2417 [2022-01-10 08:05:16,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:05:16,008 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 2910 mSDsluCounter, 2979 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2910 SdHoareTripleChecker+Valid, 4508 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:05:16,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2910 Valid, 4508 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2022-01-10 08:05:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2022-01-10 08:05:16,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2417. [2022-01-10 08:05:16,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2415 states have (on average 1.5254658385093167) internal successors, (3684), 2416 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states 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 08:05:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 3684 transitions. [2022-01-10 08:05:16,079 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 3684 transitions. Word has length 81 [2022-01-10 08:05:16,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:05:16,079 INFO L470 AbstractCegarLoop]: Abstraction has 2417 states and 3684 transitions. [2022-01-10 08:05:16,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 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 08:05:16,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 3684 transitions. [2022-01-10 08:05:16,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 08:05:16,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:05:16,080 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:05:16,103 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 08:05:16,287 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 08:05:16,287 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:05:16,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:05:16,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1134327562, now seen corresponding path program 1 times [2022-01-10 08:05:16,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:05:16,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181209729] [2022-01-10 08:05:16,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:05:16,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:05:16,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:05:16,289 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 08:05:16,291 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 08:05:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:05:16,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:05:16,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:05:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 08:05:16,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:05:16,714 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:05:16,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181209729] [2022-01-10 08:05:16,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181209729] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:05:16,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:05:16,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:05:16,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206957733] [2022-01-10 08:05:16,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:05:16,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:05:16,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:05:16,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:05:16,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:05:16,716 INFO L87 Difference]: Start difference. First operand 2417 states and 3684 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 08:05:16,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:05:16,794 INFO L93 Difference]: Finished difference Result 3256 states and 4872 transitions. [2022-01-10 08:05:16,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:05:16,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 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 08:05:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:05:16,797 INFO L225 Difference]: With dead ends: 3256 [2022-01-10 08:05:16,797 INFO L226 Difference]: Without dead ends: 2417 [2022-01-10 08:05:16,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:05:16,799 INFO L933 BasicCegarLoop]: 1532 mSDtfsCounter, 1462 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 3142 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:05:16,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 3142 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 33 Unchecked, 0.0s Time] [2022-01-10 08:05:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2022-01-10 08:05:16,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2417. [2022-01-10 08:05:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2415 states have (on average 1.5250517598343685) internal successors, (3683), 2416 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states 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 08:05:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 3683 transitions. [2022-01-10 08:05:16,844 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 3683 transitions. Word has length 81 [2022-01-10 08:05:16,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:05:16,845 INFO L470 AbstractCegarLoop]: Abstraction has 2417 states and 3683 transitions. [2022-01-10 08:05:16,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 08:05:16,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 3683 transitions. [2022-01-10 08:05:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 08:05:16,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:05:16,846 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:05:16,852 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 08:05:17,052 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 08:05:17,053 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:05:17,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:05:17,053 INFO L85 PathProgramCache]: Analyzing trace with hash 225322506, now seen corresponding path program 1 times [2022-01-10 08:05:17,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:05:17,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340909818] [2022-01-10 08:05:17,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:05:17,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:05:17,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:05:17,055 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 08:05:17,056 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 08:05:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:05:17,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:05:17,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:05:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 08:05:17,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:05:17,487 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:05:17,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340909818] [2022-01-10 08:05:17,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340909818] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:05:17,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:05:17,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:05:17,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575763339] [2022-01-10 08:05:17,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:05:17,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:05:17,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:05:17,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:05:17,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:05:17,488 INFO L87 Difference]: Start difference. First operand 2417 states and 3683 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 08:05:17,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:05:17,570 INFO L93 Difference]: Finished difference Result 3235 states and 4848 transitions. [2022-01-10 08:05:17,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:05:17,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 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 08:05:17,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:05:17,573 INFO L225 Difference]: With dead ends: 3235 [2022-01-10 08:05:17,573 INFO L226 Difference]: Without dead ends: 2392 [2022-01-10 08:05:17,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:05:17,574 INFO L933 BasicCegarLoop]: 1535 mSDtfsCounter, 1464 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 3141 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:05:17,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1464 Valid, 3141 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 33 Unchecked, 0.0s Time] [2022-01-10 08:05:17,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2022-01-10 08:05:17,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2392. [2022-01-10 08:05:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2390 states have (on average 1.5288702928870292) internal successors, (3654), 2391 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states 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 08:05:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 3654 transitions. [2022-01-10 08:05:17,602 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 3654 transitions. Word has length 81 [2022-01-10 08:05:17,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:05:17,602 INFO L470 AbstractCegarLoop]: Abstraction has 2392 states and 3654 transitions. [2022-01-10 08:05:17,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 08:05:17,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 3654 transitions. [2022-01-10 08:05:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 08:05:17,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:05:17,603 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:05:17,610 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 08:05:17,809 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 08:05:17,810 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:05:17,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:05:17,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1214317025, now seen corresponding path program 1 times [2022-01-10 08:05:17,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:05:17,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512815990] [2022-01-10 08:05:17,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:05:17,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:05:17,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:05:17,812 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 08:05:17,818 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 08:05:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:05:17,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:05:17,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:05:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:05:17,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:05:17,954 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:05:17,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512815990] [2022-01-10 08:05:17,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512815990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:05:17,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:05:17,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:05:17,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421984499] [2022-01-10 08:05:17,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:05:17,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:05:17,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:05:17,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:05:17,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:05:17,955 INFO L87 Difference]: Start difference. First operand 2392 states and 3654 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 08:05:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:05:17,983 INFO L93 Difference]: Finished difference Result 2804 states and 4238 transitions. [2022-01-10 08:05:17,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:05:17,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 08:05:17,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:05:17,986 INFO L225 Difference]: With dead ends: 2804 [2022-01-10 08:05:17,986 INFO L226 Difference]: Without dead ends: 1986 [2022-01-10 08:05:17,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 80 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 08:05:17,988 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 32 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 3067 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 08:05:17,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 3067 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:05:17,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2022-01-10 08:05:18,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1984. [2022-01-10 08:05:18,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1982 states have (on average 1.5469223007063573) internal successors, (3066), 1983 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states 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 08:05:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 3066 transitions. [2022-01-10 08:05:18,060 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 3066 transitions. Word has length 82 [2022-01-10 08:05:18,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:05:18,060 INFO L470 AbstractCegarLoop]: Abstraction has 1984 states and 3066 transitions. [2022-01-10 08:05:18,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 08:05:18,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 3066 transitions. [2022-01-10 08:05:18,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 08:05:18,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:05:18,061 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, 1, 1, 1, 1, 1] [2022-01-10 08:05:18,083 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 08:05:18,261 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 08:05:18,261 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:05:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:05:18,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1552110167, now seen corresponding path program 1 times [2022-01-10 08:05:18,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:05:18,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368056170] [2022-01-10 08:05:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:05:18,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:05:18,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:05:18,263 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 08:05:18,265 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 08:05:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:05:18,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:05:18,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:05:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:05:19,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:05:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:05:19,555 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:05:19,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368056170] [2022-01-10 08:05:19,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368056170] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:05:19,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:05:19,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 08:05:19,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730032297] [2022-01-10 08:05:19,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:05:19,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 08:05:19,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:05:19,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 08:05:19,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 08:05:19,556 INFO L87 Difference]: Start difference. First operand 1984 states and 3066 transitions. Second operand has 16 states, 16 states have (on average 9.5625) internal successors, (153), 15 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 08:05:19,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:05:19,717 INFO L93 Difference]: Finished difference Result 2406 states and 3661 transitions. [2022-01-10 08:05:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 08:05:19,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.5625) internal successors, (153), 15 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 82 [2022-01-10 08:05:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:05:19,720 INFO L225 Difference]: With dead ends: 2406 [2022-01-10 08:05:19,720 INFO L226 Difference]: Without dead ends: 1996 [2022-01-10 08:05:19,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-10 08:05:19,723 INFO L933 BasicCegarLoop]: 1521 mSDtfsCounter, 5844 mSDsluCounter, 9289 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5844 SdHoareTripleChecker+Valid, 10810 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:05:19,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5844 Valid, 10810 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 80 Unchecked, 0.0s Time] [2022-01-10 08:05:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2022-01-10 08:05:19,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1996. [2022-01-10 08:05:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1994 states have (on average 1.5456369107321966) internal successors, (3082), 1995 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states 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 08:05:19,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 3082 transitions. [2022-01-10 08:05:19,750 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 3082 transitions. Word has length 82 [2022-01-10 08:05:19,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:05:19,750 INFO L470 AbstractCegarLoop]: Abstraction has 1996 states and 3082 transitions. [2022-01-10 08:05:19,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.5625) internal successors, (153), 15 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 08:05:19,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 3082 transitions. [2022-01-10 08:05:19,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 08:05:19,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:05:19,751 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, 1, 1, 1, 1, 1, 1] [2022-01-10 08:05:19,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-01-10 08:05:19,957 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 08:05:19,957 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:05:19,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:05:19,958 INFO L85 PathProgramCache]: Analyzing trace with hash -76706487, now seen corresponding path program 1 times [2022-01-10 08:05:19,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:05:19,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755811960] [2022-01-10 08:05:19,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:05:19,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:05:19,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:05:19,984 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 08:05:19,986 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 08:05:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:05:20,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:05:20,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:05:20,162 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 08:05:20,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:05:20,163 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:05:20,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755811960] [2022-01-10 08:05:20,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755811960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:05:20,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:05:20,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:05:20,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811708369] [2022-01-10 08:05:20,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:05:20,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:05:20,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:05:20,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:05:20,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:05:20,164 INFO L87 Difference]: Start difference. First operand 1996 states and 3082 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 08:05:20,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:05:20,188 INFO L93 Difference]: Finished difference Result 2204 states and 3372 transitions. [2022-01-10 08:05:20,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:05:20,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 08:05:20,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:05:20,191 INFO L225 Difference]: With dead ends: 2204 [2022-01-10 08:05:20,191 INFO L226 Difference]: Without dead ends: 1794 [2022-01-10 08:05:20,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 81 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 08:05:20,192 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 27 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 3051 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 08:05:20,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 3051 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:05:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-01-10 08:05:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1792. [2022-01-10 08:05:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1790 states have (on average 1.559217877094972) internal successors, (2791), 1791 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states 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 08:05:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2791 transitions. [2022-01-10 08:05:20,271 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2791 transitions. Word has length 83 [2022-01-10 08:05:20,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:05:20,271 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 2791 transitions. [2022-01-10 08:05:20,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 08:05:20,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2791 transitions. [2022-01-10 08:05:20,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 08:05:20,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:05:20,271 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 08:05:20,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 08:05:20,478 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 08:05:20,479 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:05:20,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:05:20,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1294691885, now seen corresponding path program 1 times [2022-01-10 08:05:20,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:05:20,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844139759] [2022-01-10 08:05:20,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:05:20,479 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:05:20,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:05:20,480 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 08:05:20,481 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 08:05:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:05:20,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:05:20,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:05:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:05:21,578 INFO L328 TraceCheckSpWp]: Computing backward predicates...