/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/eca-rers2012/Problem14_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 05:14:49,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 05:14:49,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 05:14:49,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 05:14:49,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 05:14:49,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 05:14:49,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 05:14:49,475 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 05:14:49,500 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 05:14:49,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 05:14:49,500 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 05:14:49,500 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 05:14:49,501 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 05:14:49,501 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 05:14:49,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 05:14:49,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 05:14:49,501 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 05:14:49,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 05:14:49,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 05:14:49,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 05:14:49,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 05:14:49,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 05:14:49,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 05:14:49,503 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 05:14:49,503 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 05:14:49,503 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 05:14:49,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 05:14:49,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 05:14:49,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 05:14:49,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 05:14:49,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 05:14:49,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 05:14:49,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 05:14:49,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 05:14:49,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 05:14:49,504 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 05:14:49,504 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 05:14:49,504 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 05:14:49,504 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 05:14:49,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 05:14:49,504 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 05:14:49,504 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 05:14:49,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 05:14:49,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 05:14:49,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 05:14:49,703 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 05:14:49,704 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 05:14:49,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label03.c [2022-01-10 05:14:49,755 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca1fa5a69/82298dc56bda4aa0863fd684972c7ec2/FLAG4b6e71a8e [2022-01-10 05:14:50,150 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 05:14:50,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label03.c [2022-01-10 05:14:50,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca1fa5a69/82298dc56bda4aa0863fd684972c7ec2/FLAG4b6e71a8e [2022-01-10 05:14:50,173 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca1fa5a69/82298dc56bda4aa0863fd684972c7ec2 [2022-01-10 05:14:50,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 05:14:50,176 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 05:14:50,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 05:14:50,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 05:14:50,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 05:14:50,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:14:50" (1/1) ... [2022-01-10 05:14:50,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4510542f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:14:50, skipping insertion in model container [2022-01-10 05:14:50,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:14:50" (1/1) ... [2022-01-10 05:14:50,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 05:14:50,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 05:14:50,465 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label03.c[5277,5290] [2022-01-10 05:14:50,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 05:14:50,601 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 05:14:50,631 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label03.c[5277,5290] [2022-01-10 05:14:50,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 05:14:50,716 INFO L208 MainTranslator]: Completed translation [2022-01-10 05:14:50,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:14:50 WrapperNode [2022-01-10 05:14:50,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 05:14:50,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 05:14:50,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 05:14:50,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 05:14:50,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:14:50" (1/1) ... [2022-01-10 05:14:50,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:14:50" (1/1) ... [2022-01-10 05:14:50,821 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 856 [2022-01-10 05:14:50,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 05:14:50,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 05:14:50,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 05:14:50,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 05:14:50,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:14:50" (1/1) ... [2022-01-10 05:14:50,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:14:50" (1/1) ... [2022-01-10 05:14:50,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:14:50" (1/1) ... [2022-01-10 05:14:50,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:14:50" (1/1) ... [2022-01-10 05:14:50,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:14:50" (1/1) ... [2022-01-10 05:14:50,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:14:50" (1/1) ... [2022-01-10 05:14:50,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:14:50" (1/1) ... [2022-01-10 05:14:50,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 05:14:50,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 05:14:50,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 05:14:50,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 05:14:50,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:14:50" (1/1) ... [2022-01-10 05:14:50,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 05:14:50,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 05:14:50,931 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 05:14:50,937 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 05:14:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 05:14:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 05:14:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 05:14:50,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 05:14:51,012 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 05:14:51,013 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 05:14:53,040 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 05:14:53,049 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 05:14:53,049 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 05:14:53,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:14:53 BoogieIcfgContainer [2022-01-10 05:14:53,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 05:14:53,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 05:14:53,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 05:14:53,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 05:14:53,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 05:14:50" (1/3) ... [2022-01-10 05:14:53,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd82faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:14:53, skipping insertion in model container [2022-01-10 05:14:53,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:14:50" (2/3) ... [2022-01-10 05:14:53,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd82faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:14:53, skipping insertion in model container [2022-01-10 05:14:53,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:14:53" (3/3) ... [2022-01-10 05:14:53,057 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label03.c [2022-01-10 05:14:53,062 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 05:14:53,063 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 05:14:53,102 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 05:14:53,106 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 05:14:53,107 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 05:14:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 05:14:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 05:14:53,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:14:53,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:14:53,126 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:14:53,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:14:53,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2122806209, now seen corresponding path program 1 times [2022-01-10 05:14:53,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:14:53,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227524122] [2022-01-10 05:14:53,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:14:53,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:14:53,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:14:53,142 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 05:14:53,143 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 05:14:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:14:53,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:14:53,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:14:53,403 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 05:14:53,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:14:53,404 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:14:53,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227524122] [2022-01-10 05:14:53,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227524122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:14:53,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:14:53,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:14:53,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731853199] [2022-01-10 05:14:53,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:14:53,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:14:53,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:14:53,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:14:53,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:14:53,438 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:14:56,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:14:56,072 INFO L93 Difference]: Finished difference Result 669 states and 1200 transitions. [2022-01-10 05:14:56,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:14:56,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 05:14:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:14:56,085 INFO L225 Difference]: With dead ends: 669 [2022-01-10 05:14:56,085 INFO L226 Difference]: Without dead ends: 360 [2022-01-10 05:14:56,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 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 05:14:56,090 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 144 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-10 05:14:56,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 131 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-10 05:14:56,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-01-10 05:14:56,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2022-01-10 05:14:56,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.4874651810584958) internal successors, (534), 359 states have internal predecessors, (534), 0 states have call successors, (0), 0 states 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 05:14:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 534 transitions. [2022-01-10 05:14:56,134 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 534 transitions. Word has length 51 [2022-01-10 05:14:56,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:14:56,134 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 534 transitions. [2022-01-10 05:14:56,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:14:56,135 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 534 transitions. [2022-01-10 05:14:56,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-10 05:14:56,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:14:56,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 05:14:56,144 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 05:14:56,344 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 05:14:56,344 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:14:56,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:14:56,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1750650828, now seen corresponding path program 1 times [2022-01-10 05:14:56,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:14:56,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670025177] [2022-01-10 05:14:56,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:14:56,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:14:56,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:14:56,354 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 05:14:56,355 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 05:14:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:14:56,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:14:56,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:14:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:14:56,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:14:56,649 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:14:56,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670025177] [2022-01-10 05:14:56,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670025177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:14:56,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:14:56,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:14:56,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739719086] [2022-01-10 05:14:56,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:14:56,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:14:56,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:14:56,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:14:56,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:14:56,652 INFO L87 Difference]: Start difference. First operand 360 states and 534 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 05:14:59,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:14:59,394 INFO L93 Difference]: Finished difference Result 1074 states and 1597 transitions. [2022-01-10 05:14:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:14:59,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-01-10 05:14:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:14:59,399 INFO L225 Difference]: With dead ends: 1074 [2022-01-10 05:14:59,399 INFO L226 Difference]: Without dead ends: 716 [2022-01-10 05:14:59,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 114 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 05:14:59,401 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 115 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-10 05:14:59,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 102 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-10 05:14:59,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-01-10 05:14:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2022-01-10 05:14:59,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.3454545454545455) internal successors, (962), 715 states have internal predecessors, (962), 0 states have call successors, (0), 0 states 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 05:14:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 962 transitions. [2022-01-10 05:14:59,421 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 962 transitions. Word has length 116 [2022-01-10 05:14:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:14:59,421 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 962 transitions. [2022-01-10 05:14:59,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 05:14:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 962 transitions. [2022-01-10 05:14:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-10 05:14:59,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:14:59,424 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 05:14:59,431 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 05:14:59,631 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 05:14:59,631 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:14:59,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:14:59,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1221588022, now seen corresponding path program 1 times [2022-01-10 05:14:59,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:14:59,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972152911] [2022-01-10 05:14:59,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:14:59,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:14:59,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:14:59,634 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 05:14:59,635 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 05:14:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:14:59,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:14:59,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:14:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:14:59,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:14:59,948 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:14:59,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972152911] [2022-01-10 05:14:59,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972152911] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:14:59,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:14:59,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:14:59,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357184476] [2022-01-10 05:14:59,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:14:59,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:14:59,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:14:59,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:14:59,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:14:59,954 INFO L87 Difference]: Start difference. First operand 716 states and 962 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 05:15:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:15:02,415 INFO L93 Difference]: Finished difference Result 1966 states and 2656 transitions. [2022-01-10 05:15:02,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:15:02,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2022-01-10 05:15:02,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:15:02,419 INFO L225 Difference]: With dead ends: 1966 [2022-01-10 05:15:02,420 INFO L226 Difference]: Without dead ends: 1252 [2022-01-10 05:15:02,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 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 05:15:02,421 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 131 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-10 05:15:02,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 88 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-10 05:15:02,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-01-10 05:15:02,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1250. [2022-01-10 05:15:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 1.2465972778222578) internal successors, (1557), 1249 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states 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 05:15:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1557 transitions. [2022-01-10 05:15:02,440 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1557 transitions. Word has length 119 [2022-01-10 05:15:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:15:02,440 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1557 transitions. [2022-01-10 05:15:02,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 05:15:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1557 transitions. [2022-01-10 05:15:02,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-10 05:15:02,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:15:02,442 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 05:15:02,448 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 05:15:02,648 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 05:15:02,649 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:15:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:15:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash 516842708, now seen corresponding path program 1 times [2022-01-10 05:15:02,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:15:02,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495511738] [2022-01-10 05:15:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:15:02,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:15:02,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:15:02,652 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 05:15:02,653 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 05:15:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:15:02,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 05:15:02,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:15:03,129 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:15:03,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:15:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:15:03,545 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:15:03,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495511738] [2022-01-10 05:15:03,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495511738] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:15:03,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:15:03,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 05:15:03,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52892358] [2022-01-10 05:15:03,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:15:03,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 05:15:03,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:15:03,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 05:15:03,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 05:15:03,547 INFO L87 Difference]: Start difference. First operand 1250 states and 1557 transitions. Second operand has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 6 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 05:15:13,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:15:13,527 INFO L93 Difference]: Finished difference Result 3446 states and 4622 transitions. [2022-01-10 05:15:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 05:15:13,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 6 states have internal predecessors, (241), 0 states have call successors, (0), 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 131 [2022-01-10 05:15:13,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:15:13,534 INFO L225 Difference]: With dead ends: 3446 [2022-01-10 05:15:13,534 INFO L226 Difference]: Without dead ends: 2376 [2022-01-10 05:15:13,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-01-10 05:15:13,536 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 974 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1994 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 2441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 1994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-01-10 05:15:13,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [974 Valid, 42 Invalid, 2441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 1994 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-01-10 05:15:13,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2022-01-10 05:15:13,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1784. [2022-01-10 05:15:13,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 1.263600673022995) internal successors, (2253), 1783 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states 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 05:15:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2253 transitions. [2022-01-10 05:15:13,561 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2253 transitions. Word has length 131 [2022-01-10 05:15:13,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:15:13,561 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 2253 transitions. [2022-01-10 05:15:13,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 6 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 05:15:13,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2253 transitions. [2022-01-10 05:15:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-10 05:15:13,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:15:13,565 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:15:13,571 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 05:15:13,771 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 05:15:13,771 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:15:13,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:15:13,772 INFO L85 PathProgramCache]: Analyzing trace with hash 418328347, now seen corresponding path program 1 times [2022-01-10 05:15:13,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:15:13,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299535170] [2022-01-10 05:15:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:15:13,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:15:13,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:15:13,775 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 05:15:13,777 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 05:15:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:15:13,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 05:15:13,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:15:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 252 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-01-10 05:15:14,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:15:14,592 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:15:14,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299535170] [2022-01-10 05:15:14,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299535170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:15:14,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:15:14,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:15:14,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965863089] [2022-01-10 05:15:14,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:15:14,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 05:15:14,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:15:14,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 05:15:14,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:15:14,594 INFO L87 Difference]: Start difference. First operand 1784 states and 2253 transitions. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 05:15:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:15:16,551 INFO L93 Difference]: Finished difference Result 3595 states and 4545 transitions. [2022-01-10 05:15:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 05:15:16,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 279 [2022-01-10 05:15:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:15:16,565 INFO L225 Difference]: With dead ends: 3595 [2022-01-10 05:15:16,565 INFO L226 Difference]: Without dead ends: 1962 [2022-01-10 05:15:16,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:15:16,568 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 112 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-10 05:15:16,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 113 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-10 05:15:16,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2022-01-10 05:15:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1962. [2022-01-10 05:15:16,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.241203467618562) internal successors, (2434), 1961 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states 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 05:15:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2434 transitions. [2022-01-10 05:15:16,637 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2434 transitions. Word has length 279 [2022-01-10 05:15:16,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:15:16,638 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 2434 transitions. [2022-01-10 05:15:16,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 05:15:16,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2434 transitions. [2022-01-10 05:15:16,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-01-10 05:15:16,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:15:16,642 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:15:16,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 05:15:16,843 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 05:15:16,843 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:15:16,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:15:16,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1956125919, now seen corresponding path program 1 times [2022-01-10 05:15:16,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:15:16,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334942398] [2022-01-10 05:15:16,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:15:16,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:15:16,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:15:16,846 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 05:15:16,847 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 05:15:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:15:16,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 05:15:16,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:15:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 316 proven. 23 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-10 05:15:18,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:15:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 316 proven. 23 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-10 05:15:20,380 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:15:20,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334942398] [2022-01-10 05:15:20,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334942398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:15:20,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:15:20,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 05:15:20,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900010434] [2022-01-10 05:15:20,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:15:20,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 05:15:20,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:15:20,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 05:15:20,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 05:15:20,382 INFO L87 Difference]: Start difference. First operand 1962 states and 2434 transitions. Second operand has 7 states, 7 states have (on average 71.0) internal successors, (497), 6 states have internal predecessors, (497), 0 states have call successors, (0), 0 states 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 05:15:23,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:15:23,336 INFO L93 Difference]: Finished difference Result 3774 states and 4717 transitions. [2022-01-10 05:15:23,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 05:15:23,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 71.0) internal successors, (497), 6 states have internal predecessors, (497), 0 states have call successors, (0), 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 355 [2022-01-10 05:15:23,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:15:23,342 INFO L225 Difference]: With dead ends: 3774 [2022-01-10 05:15:23,342 INFO L226 Difference]: Without dead ends: 1992 [2022-01-10 05:15:23,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 703 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-01-10 05:15:23,344 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 467 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-10 05:15:23,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 151 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-10 05:15:23,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2022-01-10 05:15:23,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1962. [2022-01-10 05:15:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.2315145334013258) internal successors, (2415), 1961 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states 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 05:15:23,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2415 transitions. [2022-01-10 05:15:23,367 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2415 transitions. Word has length 355 [2022-01-10 05:15:23,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:15:23,368 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 2415 transitions. [2022-01-10 05:15:23,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.0) internal successors, (497), 6 states have internal predecessors, (497), 0 states have call successors, (0), 0 states 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 05:15:23,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2415 transitions. [2022-01-10 05:15:23,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2022-01-10 05:15:23,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:15:23,372 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:15:23,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 05:15:23,580 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 05:15:23,580 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:15:23,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:15:23,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1295225842, now seen corresponding path program 1 times [2022-01-10 05:15:23,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:15:23,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434911029] [2022-01-10 05:15:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:15:23,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:15:23,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:15:23,583 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 05:15:23,611 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 05:15:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:15:23,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 05:15:23,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:15:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 195 proven. 347 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-01-10 05:15:25,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:15:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 542 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-01-10 05:15:27,472 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:15:27,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434911029] [2022-01-10 05:15:27,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434911029] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 05:15:27,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 05:15:27,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 05:15:27,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745748761] [2022-01-10 05:15:27,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:15:27,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:15:27,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:15:27,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:15:27,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 05:15:27,474 INFO L87 Difference]: Start difference. First operand 1962 states and 2415 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states 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 05:15:31,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:15:31,213 INFO L93 Difference]: Finished difference Result 3922 states and 5000 transitions. [2022-01-10 05:15:31,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:15:31,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 444 [2022-01-10 05:15:31,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:15:31,235 INFO L225 Difference]: With dead ends: 3922 [2022-01-10 05:15:31,235 INFO L226 Difference]: Without dead ends: 2318 [2022-01-10 05:15:31,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 883 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 05:15:31,238 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 77 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-10 05:15:31,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 27 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-01-10 05:15:31,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2022-01-10 05:15:31,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2318. [2022-01-10 05:15:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2317 states have (on average 1.2399654725938714) internal successors, (2873), 2317 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states 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 05:15:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 2873 transitions. [2022-01-10 05:15:31,267 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 2873 transitions. Word has length 444 [2022-01-10 05:15:31,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:15:31,270 INFO L470 AbstractCegarLoop]: Abstraction has 2318 states and 2873 transitions. [2022-01-10 05:15:31,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states 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 05:15:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 2873 transitions. [2022-01-10 05:15:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2022-01-10 05:15:31,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:15:31,281 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:15:31,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 05:15:31,491 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 05:15:31,491 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:15:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:15:31,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1569159173, now seen corresponding path program 1 times [2022-01-10 05:15:31,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:15:31,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629896489] [2022-01-10 05:15:31,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:15:31,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:15:31,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:15:31,497 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 05:15:31,499 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 05:15:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:15:31,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 05:15:31,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:15:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 195 proven. 416 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-01-10 05:15:36,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:15:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 542 proven. 69 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-01-10 05:15:50,283 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:15:50,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629896489] [2022-01-10 05:15:50,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629896489] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:15:50,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:15:50,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-10 05:15:50,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923631579] [2022-01-10 05:15:50,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:15:50,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 05:15:50,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:15:50,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 05:15:50,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-01-10 05:15:50,285 INFO L87 Difference]: Start difference. First operand 2318 states and 2873 transitions. Second operand has 18 states, 18 states have (on average 36.0) internal successors, (648), 18 states have internal predecessors, (648), 0 states have call successors, (0), 0 states 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 05:15:57,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:15:57,128 INFO L93 Difference]: Finished difference Result 4940 states and 6112 transitions. [2022-01-10 05:15:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 05:15:57,129 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 36.0) internal successors, (648), 18 states have internal predecessors, (648), 0 states have call successors, (0), 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 489 [2022-01-10 05:15:57,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:15:57,135 INFO L225 Difference]: With dead ends: 4940 [2022-01-10 05:15:57,135 INFO L226 Difference]: Without dead ends: 2624 [2022-01-10 05:15:57,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 964 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2022-01-10 05:15:57,138 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 1659 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 3879 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1659 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 3940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 3879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-01-10 05:15:57,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1659 Valid, 168 Invalid, 3940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 3879 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-01-10 05:15:57,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2022-01-10 05:15:57,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2293. [2022-01-10 05:15:57,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 1.2342931937172774) internal successors, (2829), 2292 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states 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 05:15:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 2829 transitions. [2022-01-10 05:15:57,167 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 2829 transitions. Word has length 489 [2022-01-10 05:15:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:15:57,167 INFO L470 AbstractCegarLoop]: Abstraction has 2293 states and 2829 transitions. [2022-01-10 05:15:57,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 36.0) internal successors, (648), 18 states have internal predecessors, (648), 0 states have call successors, (0), 0 states 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 05:15:57,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 2829 transitions. [2022-01-10 05:15:57,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-01-10 05:15:57,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:15:57,171 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:15:57,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 05:15:57,382 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 05:15:57,382 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:15:57,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:15:57,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1977793903, now seen corresponding path program 1 times [2022-01-10 05:15:57,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:15:57,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831089057] [2022-01-10 05:15:57,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:15:57,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:15:57,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:15:57,385 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 05:15:57,386 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 05:15:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:15:57,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 05:15:57,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:15:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 470 proven. 353 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-01-10 05:15:58,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:15:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 823 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-01-10 05:15:59,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:15:59,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831089057] [2022-01-10 05:15:59,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831089057] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 05:15:59,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 05:15:59,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 05:15:59,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831465285] [2022-01-10 05:15:59,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:15:59,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:15:59,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:15:59,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:15:59,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 05:15:59,185 INFO L87 Difference]: Start difference. First operand 2293 states and 2829 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)