/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/seq-mthreaded/pals_lcr.3.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:51:16,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:51:16,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:51:16,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:51:16,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:51:16,785 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:51:16,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:51:16,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:51:16,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:51:16,787 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:51:16,787 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:51:16,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:51:16,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:51:16,787 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:51:16,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:51:16,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:51:16,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:51:16,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:51:16,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:51:16,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:51:16,788 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:51:16,789 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:51:16,789 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:51:16,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:51:16,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:51:16,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:51:16,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:51:16,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:51:16,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:51:16,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:51:16,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:51:16,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:51:16,790 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:51:16,790 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:51:16,790 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:51:16,791 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:51:16,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:51:16,791 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:51:16,791 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:51:16,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:51:17,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:51:17,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:51:17,015 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:51:17,016 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:51:17,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_lcr.3.ufo.UNBOUNDED.pals.c [2022-01-10 06:51:17,072 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc5010a03/70cfc83d05b9495984d634e81899984c/FLAGd9220d3dd [2022-01-10 06:51:17,608 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:51:17,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_lcr.3.ufo.UNBOUNDED.pals.c [2022-01-10 06:51:17,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc5010a03/70cfc83d05b9495984d634e81899984c/FLAGd9220d3dd [2022-01-10 06:51:18,061 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc5010a03/70cfc83d05b9495984d634e81899984c [2022-01-10 06:51:18,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:51:18,065 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:51:18,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:51:18,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:51:18,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:51:18,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9092a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18, skipping insertion in model container [2022-01-10 06:51:18,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:51:18,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:51:18,264 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_lcr.3.ufo.UNBOUNDED.pals.c[6043,6056] [2022-01-10 06:51:18,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:51:18,279 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:51:18,310 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_lcr.3.ufo.UNBOUNDED.pals.c[6043,6056] [2022-01-10 06:51:18,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:51:18,336 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:51:18,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18 WrapperNode [2022-01-10 06:51:18,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:51:18,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:51:18,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:51:18,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:51:18,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,353 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,376 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 208 [2022-01-10 06:51:18,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:51:18,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:51:18,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:51:18,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:51:18,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:51:18,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:51:18,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:51:18,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:51:18,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:51:18,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:51:18,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 06:51:18,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 06:51:18,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:51:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:51:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:51:18,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:51:18,529 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:51:18,531 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:51:18,806 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:51:18,812 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:51:18,813 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:51:18,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:51:18 BoogieIcfgContainer [2022-01-10 06:51:18,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:51:18,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:51:18,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:51:18,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:51:18,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:51:18" (1/3) ... [2022-01-10 06:51:18,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa97ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:51:18, skipping insertion in model container [2022-01-10 06:51:18,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (2/3) ... [2022-01-10 06:51:18,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa97ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:51:18, skipping insertion in model container [2022-01-10 06:51:18,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:51:18" (3/3) ... [2022-01-10 06:51:18,821 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c [2022-01-10 06:51:18,826 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:51:18,826 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:51:18,869 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:51:18,873 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 06:51:18,874 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:51:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 63 states have internal predecessors, (104), 0 states have call successors, (0), 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 06:51:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 06:51:18,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:18,892 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] [2022-01-10 06:51:18,893 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:18,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:18,896 INFO L85 PathProgramCache]: Analyzing trace with hash -980022832, now seen corresponding path program 1 times [2022-01-10 06:51:18,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:18,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715443366] [2022-01-10 06:51:18,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:18,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:18,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:18,907 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:18,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:51:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:18,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:51:18,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:19,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:19,046 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:19,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715443366] [2022-01-10 06:51:19,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715443366] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:19,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:19,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:51:19,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339135409] [2022-01-10 06:51:19,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:19,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:51:19,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:19,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:51:19,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:51:19,076 INFO L87 Difference]: Start difference. First operand has 64 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 63 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 06:51:19,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:19,094 INFO L93 Difference]: Finished difference Result 103 states and 167 transitions. [2022-01-10 06:51:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:51:19,096 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2022-01-10 06:51:19,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:19,106 INFO L225 Difference]: With dead ends: 103 [2022-01-10 06:51:19,106 INFO L226 Difference]: Without dead ends: 60 [2022-01-10 06:51:19,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:51:19,114 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:19,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:19,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-10 06:51:19,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-10 06:51:19,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 59 states have internal predecessors, (97), 0 states have call successors, (0), 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 06:51:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 97 transitions. [2022-01-10 06:51:19,158 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 97 transitions. Word has length 25 [2022-01-10 06:51:19,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:19,158 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 97 transitions. [2022-01-10 06:51:19,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 06:51:19,159 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 97 transitions. [2022-01-10 06:51:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 06:51:19,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:19,160 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] [2022-01-10 06:51:19,169 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 06:51:19,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:19,369 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:19,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:19,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1797671282, now seen corresponding path program 1 times [2022-01-10 06:51:19,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:19,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038480470] [2022-01-10 06:51:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:19,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:19,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:19,372 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:19,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:51:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:19,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:51:19,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:19,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:19,540 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:19,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038480470] [2022-01-10 06:51:19,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038480470] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:19,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:19,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:19,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038835594] [2022-01-10 06:51:19,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:19,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:19,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:19,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:19,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:19,543 INFO L87 Difference]: Start difference. First operand 60 states and 97 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 06:51:19,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:19,615 INFO L93 Difference]: Finished difference Result 102 states and 160 transitions. [2022-01-10 06:51:19,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:51:19,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2022-01-10 06:51:19,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:19,619 INFO L225 Difference]: With dead ends: 102 [2022-01-10 06:51:19,620 INFO L226 Difference]: Without dead ends: 60 [2022-01-10 06:51:19,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:51:19,622 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:19,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 361 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:19,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-10 06:51:19,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-10 06:51:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2022-01-10 06:51:19,637 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 25 [2022-01-10 06:51:19,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:19,638 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2022-01-10 06:51:19,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 06:51:19,638 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2022-01-10 06:51:19,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 06:51:19,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:19,639 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] [2022-01-10 06:51:19,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:19,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:19,851 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:19,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:19,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1903157419, now seen corresponding path program 1 times [2022-01-10 06:51:19,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:19,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236072764] [2022-01-10 06:51:19,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:19,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:19,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:19,855 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:19,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:51:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:19,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:19,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:20,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:20,063 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:20,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236072764] [2022-01-10 06:51:20,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236072764] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:20,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:20,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:20,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370331807] [2022-01-10 06:51:20,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:20,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:20,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:20,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:20,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:20,066 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 06:51:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:20,081 INFO L93 Difference]: Finished difference Result 130 states and 189 transitions. [2022-01-10 06:51:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:20,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2022-01-10 06:51:20,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:20,084 INFO L225 Difference]: With dead ends: 130 [2022-01-10 06:51:20,084 INFO L226 Difference]: Without dead ends: 92 [2022-01-10 06:51:20,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:20,085 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 45 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:20,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 171 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:20,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-10 06:51:20,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2022-01-10 06:51:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.4382022471910112) internal successors, (128), 89 states have internal predecessors, (128), 0 states have call successors, (0), 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 06:51:20,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 128 transitions. [2022-01-10 06:51:20,102 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 128 transitions. Word has length 40 [2022-01-10 06:51:20,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:20,104 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 128 transitions. [2022-01-10 06:51:20,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 06:51:20,104 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 128 transitions. [2022-01-10 06:51:20,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 06:51:20,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:20,115 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] [2022-01-10 06:51:20,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:20,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:20,324 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:20,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:20,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2054016735, now seen corresponding path program 1 times [2022-01-10 06:51:20,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:20,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522567635] [2022-01-10 06:51:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:20,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:20,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:20,327 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:20,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:51:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:20,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:20,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:20,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:20,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:20,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522567635] [2022-01-10 06:51:20,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522567635] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:20,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:20,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:20,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087007339] [2022-01-10 06:51:20,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:20,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:20,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:20,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:20,488 INFO L87 Difference]: Start difference. First operand 90 states and 128 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 06:51:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:20,510 INFO L93 Difference]: Finished difference Result 214 states and 320 transitions. [2022-01-10 06:51:20,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:20,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2022-01-10 06:51:20,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:20,515 INFO L225 Difference]: With dead ends: 214 [2022-01-10 06:51:20,515 INFO L226 Difference]: Without dead ends: 146 [2022-01-10 06:51:20,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:20,516 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 41 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:20,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 170 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-10 06:51:20,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2022-01-10 06:51:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.4755244755244756) internal successors, (211), 143 states have internal predecessors, (211), 0 states have call successors, (0), 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 06:51:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 211 transitions. [2022-01-10 06:51:20,530 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 211 transitions. Word has length 40 [2022-01-10 06:51:20,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:20,530 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 211 transitions. [2022-01-10 06:51:20,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 06:51:20,530 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 211 transitions. [2022-01-10 06:51:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 06:51:20,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:20,531 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] [2022-01-10 06:51:20,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:20,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:20,736 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:20,737 INFO L85 PathProgramCache]: Analyzing trace with hash -836031337, now seen corresponding path program 1 times [2022-01-10 06:51:20,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:20,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663055191] [2022-01-10 06:51:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:20,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:20,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:20,739 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:20,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:51:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:20,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:51:20,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:21,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:21,049 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:21,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663055191] [2022-01-10 06:51:21,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663055191] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:21,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:21,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:21,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691927484] [2022-01-10 06:51:21,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:21,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:21,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:21,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:21,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:21,055 INFO L87 Difference]: Start difference. First operand 144 states and 211 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 06:51:21,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:21,127 INFO L93 Difference]: Finished difference Result 632 states and 967 transitions. [2022-01-10 06:51:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:51:21,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2022-01-10 06:51:21,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:21,131 INFO L225 Difference]: With dead ends: 632 [2022-01-10 06:51:21,131 INFO L226 Difference]: Without dead ends: 510 [2022-01-10 06:51:21,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:21,133 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 292 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:21,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 254 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:51:21,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-10 06:51:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 384. [2022-01-10 06:51:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.5013054830287207) internal successors, (575), 383 states have internal predecessors, (575), 0 states have call successors, (0), 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 06:51:21,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 575 transitions. [2022-01-10 06:51:21,160 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 575 transitions. Word has length 40 [2022-01-10 06:51:21,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:21,160 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 575 transitions. [2022-01-10 06:51:21,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 06:51:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 575 transitions. [2022-01-10 06:51:21,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 06:51:21,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:21,161 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] [2022-01-10 06:51:21,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:21,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:21,362 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:21,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:21,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1682931033, now seen corresponding path program 1 times [2022-01-10 06:51:21,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:21,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427150003] [2022-01-10 06:51:21,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:21,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:21,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:21,365 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:21,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:51:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:21,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:21,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:21,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:21,514 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:21,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427150003] [2022-01-10 06:51:21,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427150003] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:21,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:21,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:21,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83858353] [2022-01-10 06:51:21,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:21,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:21,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:21,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:21,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:21,516 INFO L87 Difference]: Start difference. First operand 384 states and 575 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 06:51:21,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:21,554 INFO L93 Difference]: Finished difference Result 1044 states and 1569 transitions. [2022-01-10 06:51:21,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:21,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2022-01-10 06:51:21,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:21,557 INFO L225 Difference]: With dead ends: 1044 [2022-01-10 06:51:21,557 INFO L226 Difference]: Without dead ends: 682 [2022-01-10 06:51:21,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:21,563 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 32 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:21,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 131 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-01-10 06:51:21,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 668. [2022-01-10 06:51:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 1.4557721139430284) internal successors, (971), 667 states have internal predecessors, (971), 0 states have call successors, (0), 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 06:51:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 971 transitions. [2022-01-10 06:51:21,601 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 971 transitions. Word has length 42 [2022-01-10 06:51:21,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:21,603 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 971 transitions. [2022-01-10 06:51:21,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 06:51:21,603 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 971 transitions. [2022-01-10 06:51:21,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 06:51:21,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:21,607 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] [2022-01-10 06:51:21,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:21,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:21,816 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:21,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:21,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1015321205, now seen corresponding path program 1 times [2022-01-10 06:51:21,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:21,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694846034] [2022-01-10 06:51:21,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:21,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:21,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:21,818 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:21,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:51:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:21,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:51:21,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:21,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:21,939 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:21,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694846034] [2022-01-10 06:51:21,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694846034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:21,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:21,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:21,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133108947] [2022-01-10 06:51:21,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:21,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:21,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:21,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:21,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:21,941 INFO L87 Difference]: Start difference. First operand 668 states and 971 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 06:51:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:22,014 INFO L93 Difference]: Finished difference Result 1233 states and 1775 transitions. [2022-01-10 06:51:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:22,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2022-01-10 06:51:22,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:22,020 INFO L225 Difference]: With dead ends: 1233 [2022-01-10 06:51:22,020 INFO L226 Difference]: Without dead ends: 1231 [2022-01-10 06:51:22,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:51:22,021 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 147 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:22,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 362 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:22,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-01-10 06:51:22,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 716. [2022-01-10 06:51:22,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.4195804195804196) internal successors, (1015), 715 states have internal predecessors, (1015), 0 states have call successors, (0), 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 06:51:22,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1015 transitions. [2022-01-10 06:51:22,056 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1015 transitions. Word has length 43 [2022-01-10 06:51:22,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:22,056 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1015 transitions. [2022-01-10 06:51:22,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 06:51:22,056 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1015 transitions. [2022-01-10 06:51:22,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 06:51:22,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:22,057 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] [2022-01-10 06:51:22,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:22,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:22,266 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:22,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1022832678, now seen corresponding path program 1 times [2022-01-10 06:51:22,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:22,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295265945] [2022-01-10 06:51:22,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:22,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:22,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:22,268 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:22,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:51:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:22,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:22,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:22,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:22,412 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:22,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295265945] [2022-01-10 06:51:22,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295265945] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:22,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:22,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:22,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040891082] [2022-01-10 06:51:22,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:22,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:22,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:22,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:22,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:22,416 INFO L87 Difference]: Start difference. First operand 716 states and 1015 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 06:51:22,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:22,456 INFO L93 Difference]: Finished difference Result 1419 states and 2041 transitions. [2022-01-10 06:51:22,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:22,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-01-10 06:51:22,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:22,461 INFO L225 Difference]: With dead ends: 1419 [2022-01-10 06:51:22,461 INFO L226 Difference]: Without dead ends: 1020 [2022-01-10 06:51:22,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:22,462 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 46 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:22,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 176 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:22,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2022-01-10 06:51:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 1018. [2022-01-10 06:51:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 1.4129793510324484) internal successors, (1437), 1017 states have internal predecessors, (1437), 0 states have call successors, (0), 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 06:51:22,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1437 transitions. [2022-01-10 06:51:22,503 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1437 transitions. Word has length 44 [2022-01-10 06:51:22,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:22,503 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1437 transitions. [2022-01-10 06:51:22,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 06:51:22,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1437 transitions. [2022-01-10 06:51:22,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 06:51:22,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:22,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:22,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:22,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:22,714 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:22,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:22,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1290367787, now seen corresponding path program 1 times [2022-01-10 06:51:22,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:22,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486020168] [2022-01-10 06:51:22,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:22,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:22,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:22,716 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:22,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:51:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:22,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:22,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:22,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:22,861 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:22,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486020168] [2022-01-10 06:51:22,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486020168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:22,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:22,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:22,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968168686] [2022-01-10 06:51:22,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:22,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:22,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:22,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:22,863 INFO L87 Difference]: Start difference. First operand 1018 states and 1437 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:22,908 INFO L93 Difference]: Finished difference Result 1740 states and 2473 transitions. [2022-01-10 06:51:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:22,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 06:51:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:22,912 INFO L225 Difference]: With dead ends: 1740 [2022-01-10 06:51:22,912 INFO L226 Difference]: Without dead ends: 746 [2022-01-10 06:51:22,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:22,914 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 36 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:22,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 170 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:22,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-01-10 06:51:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 744. [2022-01-10 06:51:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 1.407806191117093) internal successors, (1046), 743 states have internal predecessors, (1046), 0 states have call successors, (0), 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 06:51:22,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1046 transitions. [2022-01-10 06:51:22,945 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1046 transitions. Word has length 63 [2022-01-10 06:51:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:22,946 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 1046 transitions. [2022-01-10 06:51:22,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1046 transitions. [2022-01-10 06:51:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:51:22,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:22,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:22,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:23,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:23,156 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:23,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:23,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1575580592, now seen corresponding path program 1 times [2022-01-10 06:51:23,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:23,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213621471] [2022-01-10 06:51:23,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:23,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:23,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:23,159 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:23,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:51:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:23,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:51:23,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:24,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:24,434 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:24,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213621471] [2022-01-10 06:51:24,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213621471] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:24,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:24,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:51:24,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606287590] [2022-01-10 06:51:24,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:24,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:51:24,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:24,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:51:24,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:51:24,436 INFO L87 Difference]: Start difference. First operand 744 states and 1046 transitions. Second operand has 16 states, 16 states have (on average 7.4375) internal successors, (119), 15 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 06:51:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:24,519 INFO L93 Difference]: Finished difference Result 1477 states and 2089 transitions. [2022-01-10 06:51:24,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:51:24,519 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 15 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 65 [2022-01-10 06:51:24,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:24,522 INFO L225 Difference]: With dead ends: 1477 [2022-01-10 06:51:24,522 INFO L226 Difference]: Without dead ends: 779 [2022-01-10 06:51:24,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:51:24,524 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 89 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:24,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 539 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2022-01-10 06:51:24,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-01-10 06:51:24,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 777. [2022-01-10 06:51:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 1.3994845360824741) internal successors, (1086), 776 states have internal predecessors, (1086), 0 states have call successors, (0), 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 06:51:24,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1086 transitions. [2022-01-10 06:51:24,551 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1086 transitions. Word has length 65 [2022-01-10 06:51:24,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:24,551 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 1086 transitions. [2022-01-10 06:51:24,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 15 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 06:51:24,552 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1086 transitions. [2022-01-10 06:51:24,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:51:24,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:24,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:24,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:24,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:24,761 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:24,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:24,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1237787450, now seen corresponding path program 1 times [2022-01-10 06:51:24,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:24,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451223268] [2022-01-10 06:51:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:24,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:24,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:24,764 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:24,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:51:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:24,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:24,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:24,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:24,915 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:24,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451223268] [2022-01-10 06:51:24,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451223268] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:24,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:24,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:24,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956575847] [2022-01-10 06:51:24,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:24,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:24,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:24,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:24,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:24,918 INFO L87 Difference]: Start difference. First operand 777 states and 1086 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 06:51:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:24,942 INFO L93 Difference]: Finished difference Result 1129 states and 1586 transitions. [2022-01-10 06:51:24,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:24,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2022-01-10 06:51:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:24,945 INFO L225 Difference]: With dead ends: 1129 [2022-01-10 06:51:24,945 INFO L226 Difference]: Without dead ends: 431 [2022-01-10 06:51:24,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:24,946 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:24,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 155 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-10 06:51:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 429. [2022-01-10 06:51:24,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.355140186915888) internal successors, (580), 428 states have internal predecessors, (580), 0 states have call successors, (0), 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 06:51:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 580 transitions. [2022-01-10 06:51:24,963 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 580 transitions. Word has length 65 [2022-01-10 06:51:24,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:24,963 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 580 transitions. [2022-01-10 06:51:24,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 06:51:24,963 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 580 transitions. [2022-01-10 06:51:24,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:51:24,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:24,964 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:24,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:25,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:25,173 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:25,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:25,173 INFO L85 PathProgramCache]: Analyzing trace with hash -938437616, now seen corresponding path program 1 times [2022-01-10 06:51:25,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:25,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332279650] [2022-01-10 06:51:25,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:25,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:25,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:25,175 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:25,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:51:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:25,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:51:25,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:25,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:26,179 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:26,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332279650] [2022-01-10 06:51:26,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332279650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:26,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:26,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:51:26,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082819303] [2022-01-10 06:51:26,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:26,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:51:26,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:26,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:51:26,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:51:26,181 INFO L87 Difference]: Start difference. First operand 429 states and 580 transitions. Second operand has 16 states, 16 states have (on average 7.0625) internal successors, (113), 15 states have internal predecessors, (113), 0 states have call successors, (0), 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 06:51:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:26,292 INFO L93 Difference]: Finished difference Result 779 states and 1073 transitions. [2022-01-10 06:51:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:51:26,296 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.0625) internal successors, (113), 15 states have internal predecessors, (113), 0 states have call successors, (0), 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 65 [2022-01-10 06:51:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:26,298 INFO L225 Difference]: With dead ends: 779 [2022-01-10 06:51:26,298 INFO L226 Difference]: Without dead ends: 429 [2022-01-10 06:51:26,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:51:26,300 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 65 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:26,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 601 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2022-01-10 06:51:26,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-10 06:51:26,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2022-01-10 06:51:26,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.352803738317757) internal successors, (579), 428 states have internal predecessors, (579), 0 states have call successors, (0), 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 06:51:26,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 579 transitions. [2022-01-10 06:51:26,315 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 579 transitions. Word has length 65 [2022-01-10 06:51:26,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:26,316 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 579 transitions. [2022-01-10 06:51:26,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.0625) internal successors, (113), 15 states have internal predecessors, (113), 0 states have call successors, (0), 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 06:51:26,316 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 579 transitions. [2022-01-10 06:51:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:51:26,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:26,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:26,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 06:51:26,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:26,526 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:26,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:26,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1647967150, now seen corresponding path program 1 times [2022-01-10 06:51:26,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:26,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814542513] [2022-01-10 06:51:26,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:26,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:26,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:26,528 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:26,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:51:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:26,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:51:26,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:51:26,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:26,883 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:26,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814542513] [2022-01-10 06:51:26,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814542513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:26,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:26,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:26,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263284891] [2022-01-10 06:51:26,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:26,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:26,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:26,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:26,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:26,885 INFO L87 Difference]: Start difference. First operand 429 states and 579 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 06:51:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:26,945 INFO L93 Difference]: Finished difference Result 792 states and 1085 transitions. [2022-01-10 06:51:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:26,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 65 [2022-01-10 06:51:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:26,948 INFO L225 Difference]: With dead ends: 792 [2022-01-10 06:51:26,948 INFO L226 Difference]: Without dead ends: 429 [2022-01-10 06:51:26,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:51:26,949 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 14 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:26,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 213 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-01-10 06:51:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-10 06:51:26,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2022-01-10 06:51:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.3504672897196262) internal successors, (578), 428 states have internal predecessors, (578), 0 states have call successors, (0), 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 06:51:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 578 transitions. [2022-01-10 06:51:26,964 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 578 transitions. Word has length 65 [2022-01-10 06:51:26,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:26,964 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 578 transitions. [2022-01-10 06:51:26,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 06:51:26,965 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 578 transitions. [2022-01-10 06:51:26,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:51:26,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:26,965 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:26,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:27,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:27,174 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:27,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:27,175 INFO L85 PathProgramCache]: Analyzing trace with hash -916049070, now seen corresponding path program 1 times [2022-01-10 06:51:27,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:27,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660194021] [2022-01-10 06:51:27,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:27,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:27,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:27,177 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:27,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:51:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:27,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:51:27,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:51:27,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:27,498 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:27,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660194021] [2022-01-10 06:51:27,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660194021] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:27,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:27,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:27,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259323324] [2022-01-10 06:51:27,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:27,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:27,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:27,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:27,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:27,499 INFO L87 Difference]: Start difference. First operand 429 states and 578 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 06:51:27,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:27,538 INFO L93 Difference]: Finished difference Result 796 states and 1089 transitions. [2022-01-10 06:51:27,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:27,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 65 [2022-01-10 06:51:27,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:27,541 INFO L225 Difference]: With dead ends: 796 [2022-01-10 06:51:27,541 INFO L226 Difference]: Without dead ends: 429 [2022-01-10 06:51:27,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:51:27,542 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 25 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:27,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 149 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-01-10 06:51:27,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-10 06:51:27,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2022-01-10 06:51:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.3481308411214954) internal successors, (577), 428 states have internal predecessors, (577), 0 states have call successors, (0), 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 06:51:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 577 transitions. [2022-01-10 06:51:27,557 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 577 transitions. Word has length 65 [2022-01-10 06:51:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:27,557 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 577 transitions. [2022-01-10 06:51:27,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 06:51:27,557 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 577 transitions. [2022-01-10 06:51:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:51:27,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:27,558 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:27,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:27,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:27,769 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:27,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:27,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1151933870, now seen corresponding path program 1 times [2022-01-10 06:51:27,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:27,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603561398] [2022-01-10 06:51:27,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:27,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:27,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:27,772 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:27,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:51:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:27,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:51:27,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:51:28,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:28,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:28,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603561398] [2022-01-10 06:51:28,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603561398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:28,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:28,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:28,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610807906] [2022-01-10 06:51:28,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:28,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:28,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:28,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:28,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:28,092 INFO L87 Difference]: Start difference. First operand 429 states and 577 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 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 06:51:28,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:28,156 INFO L93 Difference]: Finished difference Result 779 states and 1070 transitions. [2022-01-10 06:51:28,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:28,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 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 65 [2022-01-10 06:51:28,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:28,158 INFO L225 Difference]: With dead ends: 779 [2022-01-10 06:51:28,158 INFO L226 Difference]: Without dead ends: 408 [2022-01-10 06:51:28,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:51:28,162 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 18 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:28,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 254 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 47 Unchecked, 0.0s Time] [2022-01-10 06:51:28,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-01-10 06:51:28,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2022-01-10 06:51:28,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.3587223587223587) internal successors, (553), 407 states have internal predecessors, (553), 0 states have call successors, (0), 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 06:51:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 553 transitions. [2022-01-10 06:51:28,179 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 553 transitions. Word has length 65 [2022-01-10 06:51:28,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:28,179 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 553 transitions. [2022-01-10 06:51:28,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 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 06:51:28,179 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 553 transitions. [2022-01-10 06:51:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 06:51:28,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:28,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:28,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:28,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:28,391 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:28,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:28,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1375533832, now seen corresponding path program 1 times [2022-01-10 06:51:28,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:28,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803989534] [2022-01-10 06:51:28,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:28,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:28,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:28,394 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:28,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:51:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:28,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:51:28,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:29,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:29,498 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:29,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803989534] [2022-01-10 06:51:29,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803989534] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:29,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:29,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:51:29,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044072251] [2022-01-10 06:51:29,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:29,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:51:29,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:51:29,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:51:29,500 INFO L87 Difference]: Start difference. First operand 408 states and 553 transitions. Second operand has 16 states, 16 states have (on average 7.8125) internal successors, (125), 15 states have internal predecessors, (125), 0 states have call successors, (0), 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 06:51:29,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:29,604 INFO L93 Difference]: Finished difference Result 772 states and 1070 transitions. [2022-01-10 06:51:29,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:51:29,605 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.8125) internal successors, (125), 15 states have internal predecessors, (125), 0 states have call successors, (0), 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 66 [2022-01-10 06:51:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:29,606 INFO L225 Difference]: With dead ends: 772 [2022-01-10 06:51:29,606 INFO L226 Difference]: Without dead ends: 422 [2022-01-10 06:51:29,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:51:29,607 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 64 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:29,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 689 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 74 Unchecked, 0.0s Time] [2022-01-10 06:51:29,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-01-10 06:51:29,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2022-01-10 06:51:29,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.3627684964200477) internal successors, (571), 419 states have internal predecessors, (571), 0 states have call successors, (0), 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 06:51:29,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 571 transitions. [2022-01-10 06:51:29,627 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 571 transitions. Word has length 66 [2022-01-10 06:51:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:29,628 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 571 transitions. [2022-01-10 06:51:29,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.8125) internal successors, (125), 15 states have internal predecessors, (125), 0 states have call successors, (0), 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 06:51:29,628 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 571 transitions. [2022-01-10 06:51:29,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 06:51:29,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:29,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:29,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:29,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:29,838 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:29,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:29,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1701448066, now seen corresponding path program 1 times [2022-01-10 06:51:29,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:29,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363461712] [2022-01-10 06:51:29,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:29,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:29,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:29,840 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:29,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:51:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:29,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:29,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:29,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:29,988 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:29,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363461712] [2022-01-10 06:51:29,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363461712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:29,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:29,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:29,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138473457] [2022-01-10 06:51:29,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:29,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:29,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:29,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:29,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:29,989 INFO L87 Difference]: Start difference. First operand 420 states and 571 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 06:51:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:30,008 INFO L93 Difference]: Finished difference Result 598 states and 819 transitions. [2022-01-10 06:51:30,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:30,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-01-10 06:51:30,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:30,010 INFO L225 Difference]: With dead ends: 598 [2022-01-10 06:51:30,010 INFO L226 Difference]: Without dead ends: 248 [2022-01-10 06:51:30,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:30,011 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 23 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:30,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 140 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:30,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-10 06:51:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 246. [2022-01-10 06:51:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.3061224489795917) internal successors, (320), 245 states have internal predecessors, (320), 0 states have call successors, (0), 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 06:51:30,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 320 transitions. [2022-01-10 06:51:30,020 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 320 transitions. Word has length 66 [2022-01-10 06:51:30,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:30,020 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 320 transitions. [2022-01-10 06:51:30,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 06:51:30,021 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 320 transitions. [2022-01-10 06:51:30,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 06:51:30,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:30,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:30,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:30,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:30,230 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:30,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:30,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2090934393, now seen corresponding path program 1 times [2022-01-10 06:51:30,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:30,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287344184] [2022-01-10 06:51:30,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:30,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:30,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:30,232 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:30,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 06:51:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:30,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:51:30,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:51:30,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:30,529 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:30,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287344184] [2022-01-10 06:51:30,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287344184] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:30,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:30,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:30,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339051528] [2022-01-10 06:51:30,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:30,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:30,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:30,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:30,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:30,533 INFO L87 Difference]: Start difference. First operand 246 states and 320 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 06:51:30,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:30,596 INFO L93 Difference]: Finished difference Result 490 states and 654 transitions. [2022-01-10 06:51:30,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:51:30,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 67 [2022-01-10 06:51:30,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:30,598 INFO L225 Difference]: With dead ends: 490 [2022-01-10 06:51:30,598 INFO L226 Difference]: Without dead ends: 314 [2022-01-10 06:51:30,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:30,599 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 193 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:30,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 307 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:30,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-10 06:51:30,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 246. [2022-01-10 06:51:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.2816326530612245) internal successors, (314), 245 states have internal predecessors, (314), 0 states have call successors, (0), 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 06:51:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 314 transitions. [2022-01-10 06:51:30,611 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 314 transitions. Word has length 67 [2022-01-10 06:51:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:30,611 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 314 transitions. [2022-01-10 06:51:30,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 06:51:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 314 transitions. [2022-01-10 06:51:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 06:51:30,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:30,612 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:30,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:30,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:30,821 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:30,822 INFO L85 PathProgramCache]: Analyzing trace with hash -588575286, now seen corresponding path program 1 times [2022-01-10 06:51:30,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:30,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85866081] [2022-01-10 06:51:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:30,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:30,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:30,823 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:30,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 06:51:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:30,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:51:30,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:51:31,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:31,142 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:31,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85866081] [2022-01-10 06:51:31,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85866081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:31,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:31,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:31,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105195661] [2022-01-10 06:51:31,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:31,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:31,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:31,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:31,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:31,146 INFO L87 Difference]: Start difference. First operand 246 states and 314 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 06:51:31,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:31,206 INFO L93 Difference]: Finished difference Result 432 states and 571 transitions. [2022-01-10 06:51:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:51:31,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 67 [2022-01-10 06:51:31,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:31,208 INFO L225 Difference]: With dead ends: 432 [2022-01-10 06:51:31,208 INFO L226 Difference]: Without dead ends: 372 [2022-01-10 06:51:31,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:31,209 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 189 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:31,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 315 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-01-10 06:51:31,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 308. [2022-01-10 06:51:31,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.286644951140065) internal successors, (395), 307 states have internal predecessors, (395), 0 states have call successors, (0), 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 06:51:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 395 transitions. [2022-01-10 06:51:31,222 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 395 transitions. Word has length 67 [2022-01-10 06:51:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:31,223 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 395 transitions. [2022-01-10 06:51:31,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 06:51:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 395 transitions. [2022-01-10 06:51:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 06:51:31,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:31,223 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:31,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:31,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:31,431 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:31,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:31,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1944039065, now seen corresponding path program 1 times [2022-01-10 06:51:31,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:31,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757520794] [2022-01-10 06:51:31,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:31,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:31,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:31,434 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:31,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:51:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:31,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:51:31,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:51:31,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:31,739 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:31,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757520794] [2022-01-10 06:51:31,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757520794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:31,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:31,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:31,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749851749] [2022-01-10 06:51:31,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:31,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:31,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:31,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:31,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:31,741 INFO L87 Difference]: Start difference. First operand 308 states and 395 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 06:51:31,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:31,822 INFO L93 Difference]: Finished difference Result 494 states and 652 transitions. [2022-01-10 06:51:31,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:51:31,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 67 [2022-01-10 06:51:31,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:31,825 INFO L225 Difference]: With dead ends: 494 [2022-01-10 06:51:31,825 INFO L226 Difference]: Without dead ends: 434 [2022-01-10 06:51:31,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:31,826 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 166 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:31,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 363 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:51:31,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-01-10 06:51:31,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 370. [2022-01-10 06:51:31,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.2899728997289972) internal successors, (476), 369 states have internal predecessors, (476), 0 states have call successors, (0), 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 06:51:31,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 476 transitions. [2022-01-10 06:51:31,844 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 476 transitions. Word has length 67 [2022-01-10 06:51:31,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:31,844 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 476 transitions. [2022-01-10 06:51:31,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 06:51:31,844 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 476 transitions. [2022-01-10 06:51:31,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:51:31,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:31,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:31,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:32,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:32,053 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:32,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:32,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1730655410, now seen corresponding path program 1 times [2022-01-10 06:51:32,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:32,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185929728] [2022-01-10 06:51:32,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:32,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:32,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:32,055 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:32,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:51:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:32,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 06:51:32,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:33,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:35,055 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:35,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185929728] [2022-01-10 06:51:35,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185929728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:35,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:35,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2022-01-10 06:51:35,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337316401] [2022-01-10 06:51:35,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:35,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-10 06:51:35,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:35,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-10 06:51:35,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 06:51:35,057 INFO L87 Difference]: Start difference. First operand 370 states and 476 transitions. Second operand has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 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 06:51:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:35,597 INFO L93 Difference]: Finished difference Result 621 states and 799 transitions. [2022-01-10 06:51:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 06:51:35,598 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 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 68 [2022-01-10 06:51:35,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:35,599 INFO L225 Difference]: With dead ends: 621 [2022-01-10 06:51:35,600 INFO L226 Difference]: Without dead ends: 499 [2022-01-10 06:51:35,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 06:51:35,601 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 205 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:35,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1126 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 277 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2022-01-10 06:51:35,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-10 06:51:35,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 376. [2022-01-10 06:51:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 1.288) internal successors, (483), 375 states have internal predecessors, (483), 0 states have call successors, (0), 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 06:51:35,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 483 transitions. [2022-01-10 06:51:35,618 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 483 transitions. Word has length 68 [2022-01-10 06:51:35,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:35,619 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 483 transitions. [2022-01-10 06:51:35,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 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 06:51:35,619 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 483 transitions. [2022-01-10 06:51:35,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:51:35,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:35,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:35,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:35,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:35,828 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:35,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1634016075, now seen corresponding path program 1 times [2022-01-10 06:51:35,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:35,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491886122] [2022-01-10 06:51:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:35,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:35,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:35,830 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:35,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:51:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:35,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 06:51:35,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:37,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:38,151 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:38,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491886122] [2022-01-10 06:51:38,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491886122] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:38,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:38,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2022-01-10 06:51:38,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552611632] [2022-01-10 06:51:38,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:38,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-10 06:51:38,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:38,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-10 06:51:38,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 06:51:38,153 INFO L87 Difference]: Start difference. First operand 376 states and 483 transitions. Second operand has 35 states, 35 states have (on average 3.6) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 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 06:51:38,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:38,531 INFO L93 Difference]: Finished difference Result 629 states and 806 transitions. [2022-01-10 06:51:38,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 06:51:38,532 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.6) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 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 68 [2022-01-10 06:51:38,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:38,534 INFO L225 Difference]: With dead ends: 629 [2022-01-10 06:51:38,534 INFO L226 Difference]: Without dead ends: 497 [2022-01-10 06:51:38,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 06:51:38,535 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 175 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:38,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 958 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 252 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-01-10 06:51:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-01-10 06:51:38,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 362. [2022-01-10 06:51:38,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 1.290858725761773) internal successors, (466), 361 states have internal predecessors, (466), 0 states have call successors, (0), 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 06:51:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 466 transitions. [2022-01-10 06:51:38,587 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 466 transitions. Word has length 68 [2022-01-10 06:51:38,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:38,588 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 466 transitions. [2022-01-10 06:51:38,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.6) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 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 06:51:38,588 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 466 transitions. [2022-01-10 06:51:38,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:51:38,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:38,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:38,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:38,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:38,797 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:38,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:38,798 INFO L85 PathProgramCache]: Analyzing trace with hash 867126198, now seen corresponding path program 1 times [2022-01-10 06:51:38,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:38,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217913831] [2022-01-10 06:51:38,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:38,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:38,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:38,800 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:38,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:51:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:38,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:51:38,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:51:39,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:51:39,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:39,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217913831] [2022-01-10 06:51:39,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217913831] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:39,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:39,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:51:39,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136730196] [2022-01-10 06:51:39,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:39,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:39,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:39,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:39,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:39,185 INFO L87 Difference]: Start difference. First operand 362 states and 466 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 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 06:51:39,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:39,255 INFO L93 Difference]: Finished difference Result 1156 states and 1509 transitions. [2022-01-10 06:51:39,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:39,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 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 69 [2022-01-10 06:51:39,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:39,258 INFO L225 Difference]: With dead ends: 1156 [2022-01-10 06:51:39,258 INFO L226 Difference]: Without dead ends: 864 [2022-01-10 06:51:39,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:51:39,259 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 151 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:39,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 430 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2022-01-10 06:51:39,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-01-10 06:51:39,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 761. [2022-01-10 06:51:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 1.2868421052631578) internal successors, (978), 760 states have internal predecessors, (978), 0 states have call successors, (0), 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 06:51:39,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 978 transitions. [2022-01-10 06:51:39,291 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 978 transitions. Word has length 69 [2022-01-10 06:51:39,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:39,291 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 978 transitions. [2022-01-10 06:51:39,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 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 06:51:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 978 transitions. [2022-01-10 06:51:39,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:51:39,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:39,292 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:39,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:39,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:39,501 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:39,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:39,502 INFO L85 PathProgramCache]: Analyzing trace with hash -692464161, now seen corresponding path program 1 times [2022-01-10 06:51:39,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:39,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168821875] [2022-01-10 06:51:39,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:39,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:39,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:39,503 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:39,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 06:51:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:39,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 06:51:39,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:42,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:43,618 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:43,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168821875] [2022-01-10 06:51:43,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168821875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:43,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:43,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2022-01-10 06:51:43,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136943743] [2022-01-10 06:51:43,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:43,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-10 06:51:43,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:43,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-10 06:51:43,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 06:51:43,620 INFO L87 Difference]: Start difference. First operand 761 states and 978 transitions. Second operand has 37 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 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 06:51:43,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:43,986 INFO L93 Difference]: Finished difference Result 1022 states and 1316 transitions. [2022-01-10 06:51:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 06:51:43,987 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 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 69 [2022-01-10 06:51:43,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:43,988 INFO L225 Difference]: With dead ends: 1022 [2022-01-10 06:51:43,988 INFO L226 Difference]: Without dead ends: 788 [2022-01-10 06:51:43,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 06:51:43,990 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 159 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:43,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 915 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 161 Invalid, 0 Unknown, 136 Unchecked, 0.1s Time] [2022-01-10 06:51:43,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-01-10 06:51:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 767. [2022-01-10 06:51:44,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 1.2859007832898173) internal successors, (985), 766 states have internal predecessors, (985), 0 states have call successors, (0), 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 06:51:44,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 985 transitions. [2022-01-10 06:51:44,022 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 985 transitions. Word has length 69 [2022-01-10 06:51:44,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:44,023 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 985 transitions. [2022-01-10 06:51:44,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 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 06:51:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 985 transitions. [2022-01-10 06:51:44,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:51:44,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:44,024 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:44,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-01-10 06:51:44,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:44,227 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:44,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2102394366, now seen corresponding path program 1 times [2022-01-10 06:51:44,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:44,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551713603] [2022-01-10 06:51:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:44,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:44,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:44,229 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:44,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 06:51:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:44,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 06:51:44,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:46,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:47,517 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:47,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551713603] [2022-01-10 06:51:47,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551713603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:47,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:47,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2022-01-10 06:51:47,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687215117] [2022-01-10 06:51:47,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:47,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-10 06:51:47,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:47,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-10 06:51:47,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 06:51:47,519 INFO L87 Difference]: Start difference. First operand 767 states and 985 transitions. Second operand has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 0 states have call successors, (0), 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 06:51:48,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:48,134 INFO L93 Difference]: Finished difference Result 1331 states and 1690 transitions. [2022-01-10 06:51:48,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 06:51:48,135 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 0 states have call successors, (0), 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 69 [2022-01-10 06:51:48,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:48,137 INFO L225 Difference]: With dead ends: 1331 [2022-01-10 06:51:48,138 INFO L226 Difference]: Without dead ends: 887 [2022-01-10 06:51:48,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2022-01-10 06:51:48,139 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 238 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:48,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 1091 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 378 Invalid, 0 Unknown, 156 Unchecked, 0.3s Time] [2022-01-10 06:51:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-01-10 06:51:48,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 644. [2022-01-10 06:51:48,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 1.2768273716951788) internal successors, (821), 643 states have internal predecessors, (821), 0 states have call successors, (0), 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 06:51:48,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 821 transitions. [2022-01-10 06:51:48,179 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 821 transitions. Word has length 69 [2022-01-10 06:51:48,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:48,179 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 821 transitions. [2022-01-10 06:51:48,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 0 states have call successors, (0), 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 06:51:48,180 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 821 transitions. [2022-01-10 06:51:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 06:51:48,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:48,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:48,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:48,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:48,390 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:48,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:48,390 INFO L85 PathProgramCache]: Analyzing trace with hash -878889244, now seen corresponding path program 1 times [2022-01-10 06:51:48,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:48,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853472666] [2022-01-10 06:51:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:48,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:48,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:48,393 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:48,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 06:51:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:48,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:51:48,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:51:48,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:51:48,741 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:48,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853472666] [2022-01-10 06:51:48,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853472666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:48,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:48,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:51:48,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72452858] [2022-01-10 06:51:48,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:48,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:48,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:48,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:48,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:48,743 INFO L87 Difference]: Start difference. First operand 644 states and 821 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 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 06:51:48,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:48,789 INFO L93 Difference]: Finished difference Result 1214 states and 1559 transitions. [2022-01-10 06:51:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:48,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 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 70 [2022-01-10 06:51:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:48,791 INFO L225 Difference]: With dead ends: 1214 [2022-01-10 06:51:48,791 INFO L226 Difference]: Without dead ends: 729 [2022-01-10 06:51:48,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:51:48,792 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 122 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:48,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 365 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-01-10 06:51:48,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-01-10 06:51:48,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 707. [2022-01-10 06:51:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 1.2662889518413598) internal successors, (894), 706 states have internal predecessors, (894), 0 states have call successors, (0), 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 06:51:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 894 transitions. [2022-01-10 06:51:48,827 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 894 transitions. Word has length 70 [2022-01-10 06:51:48,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:48,827 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 894 transitions. [2022-01-10 06:51:48,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 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 06:51:48,828 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 894 transitions. [2022-01-10 06:51:48,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 06:51:48,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:48,828 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:48,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-01-10 06:51:49,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:49,029 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:49,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:49,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1362769912, now seen corresponding path program 1 times [2022-01-10 06:51:49,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:49,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356361092] [2022-01-10 06:51:49,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:49,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:49,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:49,030 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:49,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 06:51:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:49,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:51:49,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:49,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:50,114 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:50,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356361092] [2022-01-10 06:51:50,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356361092] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:50,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:50,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-01-10 06:51:50,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486813740] [2022-01-10 06:51:50,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:50,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 06:51:50,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:50,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 06:51:50,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:51:50,115 INFO L87 Difference]: Start difference. First operand 707 states and 894 transitions. Second operand has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 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 06:51:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:50,194 INFO L93 Difference]: Finished difference Result 899 states and 1142 transitions. [2022-01-10 06:51:50,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:51:50,195 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 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 70 [2022-01-10 06:51:50,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:50,196 INFO L225 Difference]: With dead ends: 899 [2022-01-10 06:51:50,196 INFO L226 Difference]: Without dead ends: 594 [2022-01-10 06:51:50,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:51:50,197 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 48 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:50,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 675 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 55 Unchecked, 0.0s Time] [2022-01-10 06:51:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-01-10 06:51:50,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 582. [2022-01-10 06:51:50,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.2530120481927711) internal successors, (728), 581 states have internal predecessors, (728), 0 states have call successors, (0), 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 06:51:50,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 728 transitions. [2022-01-10 06:51:50,225 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 728 transitions. Word has length 70 [2022-01-10 06:51:50,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:50,225 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 728 transitions. [2022-01-10 06:51:50,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 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 06:51:50,225 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 728 transitions. [2022-01-10 06:51:50,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:51:50,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:50,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:50,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:50,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:50,435 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:50,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:50,436 INFO L85 PathProgramCache]: Analyzing trace with hash -375920816, now seen corresponding path program 1 times [2022-01-10 06:51:50,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:50,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456032968] [2022-01-10 06:51:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:50,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:50,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:50,437 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:50,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 06:51:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:50,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:51:50,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:51,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:52,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:52,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456032968] [2022-01-10 06:51:52,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456032968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:52,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:52,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 06:51:52,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718929743] [2022-01-10 06:51:52,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:52,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:51:52,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:52,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:51:52,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:51:52,280 INFO L87 Difference]: Start difference. First operand 582 states and 728 transitions. Second operand has 26 states, 26 states have (on average 8.26923076923077) internal successors, (215), 25 states have internal predecessors, (215), 0 states have call successors, (0), 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 06:51:52,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:52,434 INFO L93 Difference]: Finished difference Result 1094 states and 1375 transitions. [2022-01-10 06:51:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:51:52,435 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.26923076923077) internal successors, (215), 25 states have internal predecessors, (215), 0 states have call successors, (0), 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 114 [2022-01-10 06:51:52,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:52,436 INFO L225 Difference]: With dead ends: 1094 [2022-01-10 06:51:52,436 INFO L226 Difference]: Without dead ends: 640 [2022-01-10 06:51:52,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:51:52,437 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 110 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:52,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1399 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 94 Unchecked, 0.0s Time] [2022-01-10 06:51:52,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-01-10 06:51:52,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 640. [2022-01-10 06:51:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.242566510172144) internal successors, (794), 639 states have internal predecessors, (794), 0 states have call successors, (0), 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 06:51:52,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 794 transitions. [2022-01-10 06:51:52,466 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 794 transitions. Word has length 114 [2022-01-10 06:51:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:52,466 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 794 transitions. [2022-01-10 06:51:52,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.26923076923077) internal successors, (215), 25 states have internal predecessors, (215), 0 states have call successors, (0), 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 06:51:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 794 transitions. [2022-01-10 06:51:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:51:52,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:52,468 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:52,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:52,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:52,677 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:52,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:52,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1897073410, now seen corresponding path program 1 times [2022-01-10 06:51:52,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:52,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050912689] [2022-01-10 06:51:52,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:52,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:52,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:52,679 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:52,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 06:51:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:52,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:51:52,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:54,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:54,537 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:54,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050912689] [2022-01-10 06:51:54,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050912689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:54,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:54,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 06:51:54,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749335454] [2022-01-10 06:51:54,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:54,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:51:54,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:54,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:51:54,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:51:54,538 INFO L87 Difference]: Start difference. First operand 640 states and 794 transitions. Second operand has 26 states, 26 states have (on average 8.5) internal successors, (221), 25 states have internal predecessors, (221), 0 states have call successors, (0), 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 06:51:54,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:54,662 INFO L93 Difference]: Finished difference Result 1206 states and 1503 transitions. [2022-01-10 06:51:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:51:54,662 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.5) internal successors, (221), 25 states have internal predecessors, (221), 0 states have call successors, (0), 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 114 [2022-01-10 06:51:54,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:54,664 INFO L225 Difference]: With dead ends: 1206 [2022-01-10 06:51:54,664 INFO L226 Difference]: Without dead ends: 764 [2022-01-10 06:51:54,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:51:54,665 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 99 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1440 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:54,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1440 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 97 Unchecked, 0.0s Time] [2022-01-10 06:51:54,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-01-10 06:51:54,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 764. [2022-01-10 06:51:54,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 1.2293577981651376) internal successors, (938), 763 states have internal predecessors, (938), 0 states have call successors, (0), 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 06:51:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 938 transitions. [2022-01-10 06:51:54,697 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 938 transitions. Word has length 114 [2022-01-10 06:51:54,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:54,697 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 938 transitions. [2022-01-10 06:51:54,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.5) internal successors, (221), 25 states have internal predecessors, (221), 0 states have call successors, (0), 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 06:51:54,697 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 938 transitions. [2022-01-10 06:51:54,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:51:54,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:54,698 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:54,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:54,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:54,907 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:54,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2033123088, now seen corresponding path program 1 times [2022-01-10 06:51:54,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:54,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446881487] [2022-01-10 06:51:54,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:54,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:54,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:54,909 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:54,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 06:51:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:54,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:51:54,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:56,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:56,616 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:56,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446881487] [2022-01-10 06:51:56,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446881487] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:56,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:56,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 06:51:56,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113869611] [2022-01-10 06:51:56,616 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:56,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:51:56,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:56,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:51:56,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:51:56,617 INFO L87 Difference]: Start difference. First operand 764 states and 938 transitions. Second operand has 26 states, 26 states have (on average 8.038461538461538) internal successors, (209), 25 states have internal predecessors, (209), 0 states have call successors, (0), 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 06:51:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:56,776 INFO L93 Difference]: Finished difference Result 1368 states and 1686 transitions. [2022-01-10 06:51:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:51:56,776 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.038461538461538) internal successors, (209), 25 states have internal predecessors, (209), 0 states have call successors, (0), 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 114 [2022-01-10 06:51:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:56,778 INFO L225 Difference]: With dead ends: 1368 [2022-01-10 06:51:56,778 INFO L226 Difference]: Without dead ends: 908 [2022-01-10 06:51:56,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:51:56,779 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 148 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:56,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1099 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 71 Unchecked, 0.0s Time] [2022-01-10 06:51:56,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-01-10 06:51:56,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 908. [2022-01-10 06:51:56,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 1.2061742006615215) internal successors, (1094), 907 states have internal predecessors, (1094), 0 states have call successors, (0), 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 06:51:56,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1094 transitions. [2022-01-10 06:51:56,821 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1094 transitions. Word has length 114 [2022-01-10 06:51:56,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:56,821 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1094 transitions. [2022-01-10 06:51:56,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.038461538461538) internal successors, (209), 25 states have internal predecessors, (209), 0 states have call successors, (0), 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 06:51:56,821 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1094 transitions. [2022-01-10 06:51:56,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:51:56,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:56,823 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-01-10 06:51:56,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-01-10 06:51:57,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:57,023 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:57,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:57,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1219926318, now seen corresponding path program 1 times [2022-01-10 06:51:57,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:57,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923535550] [2022-01-10 06:51:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:57,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:57,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:57,025 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:57,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 06:51:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:57,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:51:57,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:51:58,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:51:58,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:58,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923535550] [2022-01-10 06:51:58,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923535550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:58,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:58,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:51:58,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502035688] [2022-01-10 06:51:58,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:58,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:51:58,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:58,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:51:58,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:51:58,611 INFO L87 Difference]: Start difference. First operand 908 states and 1094 transitions. Second operand has 20 states, 20 states have (on average 9.45) internal successors, (189), 19 states have internal predecessors, (189), 0 states have call successors, (0), 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 06:51:58,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:58,689 INFO L93 Difference]: Finished difference Result 1407 states and 1733 transitions. [2022-01-10 06:51:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:51:58,690 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.45) internal successors, (189), 19 states have internal predecessors, (189), 0 states have call successors, (0), 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 114 [2022-01-10 06:51:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:58,692 INFO L225 Difference]: With dead ends: 1407 [2022-01-10 06:51:58,692 INFO L226 Difference]: Without dead ends: 908 [2022-01-10 06:51:58,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-10 06:51:58,693 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 103 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:58,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 700 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 59 Unchecked, 0.0s Time] [2022-01-10 06:51:58,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-01-10 06:51:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 908. [2022-01-10 06:51:58,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 1.2017640573318633) internal successors, (1090), 907 states have internal predecessors, (1090), 0 states have call successors, (0), 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 06:51:58,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1090 transitions. [2022-01-10 06:51:58,736 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1090 transitions. Word has length 114 [2022-01-10 06:51:58,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:58,736 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1090 transitions. [2022-01-10 06:51:58,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.45) internal successors, (189), 19 states have internal predecessors, (189), 0 states have call successors, (0), 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 06:51:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1090 transitions. [2022-01-10 06:51:58,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:51:58,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:58,737 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-01-10 06:51:58,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-01-10 06:51:58,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:58,938 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:58,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:58,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2073679314, now seen corresponding path program 1 times [2022-01-10 06:51:58,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:58,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023000249] [2022-01-10 06:51:58,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:58,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:58,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:58,940 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:58,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 06:51:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:58,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:51:59,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:51:59,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:52:00,316 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:00,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023000249] [2022-01-10 06:52:00,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023000249] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:00,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:00,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:52:00,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812456127] [2022-01-10 06:52:00,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:00,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:52:00,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:00,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:52:00,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:52:00,317 INFO L87 Difference]: Start difference. First operand 908 states and 1090 transitions. Second operand has 20 states, 20 states have (on average 9.2) internal successors, (184), 19 states have internal predecessors, (184), 0 states have call successors, (0), 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 06:52:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:00,461 INFO L93 Difference]: Finished difference Result 1411 states and 1734 transitions. [2022-01-10 06:52:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:52:00,463 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.2) internal successors, (184), 19 states have internal predecessors, (184), 0 states have call successors, (0), 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 114 [2022-01-10 06:52:00,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:00,466 INFO L225 Difference]: With dead ends: 1411 [2022-01-10 06:52:00,466 INFO L226 Difference]: Without dead ends: 908 [2022-01-10 06:52:00,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:52:00,467 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 82 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:00,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 826 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 72 Unchecked, 0.0s Time] [2022-01-10 06:52:00,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-01-10 06:52:00,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 908. [2022-01-10 06:52:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 1.1973539140022051) internal successors, (1086), 907 states have internal predecessors, (1086), 0 states have call successors, (0), 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 06:52:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1086 transitions. [2022-01-10 06:52:00,514 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1086 transitions. Word has length 114 [2022-01-10 06:52:00,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:00,515 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1086 transitions. [2022-01-10 06:52:00,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.2) internal successors, (184), 19 states have internal predecessors, (184), 0 states have call successors, (0), 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 06:52:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1086 transitions. [2022-01-10 06:52:00,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:52:00,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:00,516 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-01-10 06:52:00,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:00,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:00,726 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:00,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:00,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1273314094, now seen corresponding path program 1 times [2022-01-10 06:52:00,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:00,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246852597] [2022-01-10 06:52:00,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:00,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:00,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:00,728 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:00,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 06:52:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:00,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:52:00,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 06:52:01,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 06:52:02,028 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:02,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246852597] [2022-01-10 06:52:02,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246852597] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:02,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:02,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:52:02,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089319285] [2022-01-10 06:52:02,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:02,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:52:02,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:02,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:52:02,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:52:02,029 INFO L87 Difference]: Start difference. First operand 908 states and 1086 transitions. Second operand has 20 states, 20 states have (on average 8.95) internal successors, (179), 19 states have internal predecessors, (179), 0 states have call successors, (0), 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 06:52:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:02,149 INFO L93 Difference]: Finished difference Result 1415 states and 1735 transitions. [2022-01-10 06:52:02,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:52:02,150 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 8.95) internal successors, (179), 19 states have internal predecessors, (179), 0 states have call successors, (0), 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 114 [2022-01-10 06:52:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:02,151 INFO L225 Difference]: With dead ends: 1415 [2022-01-10 06:52:02,152 INFO L226 Difference]: Without dead ends: 908 [2022-01-10 06:52:02,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:52:02,153 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 86 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:02,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 726 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2022-01-10 06:52:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-01-10 06:52:02,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 908. [2022-01-10 06:52:02,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 1.1929437706725468) internal successors, (1082), 907 states have internal predecessors, (1082), 0 states have call successors, (0), 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 06:52:02,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1082 transitions. [2022-01-10 06:52:02,192 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1082 transitions. Word has length 114 [2022-01-10 06:52:02,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:02,192 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1082 transitions. [2022-01-10 06:52:02,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.95) internal successors, (179), 19 states have internal predecessors, (179), 0 states have call successors, (0), 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 06:52:02,192 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1082 transitions. [2022-01-10 06:52:02,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:52:02,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:02,193 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:02,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:02,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:02,403 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:02,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:02,403 INFO L85 PathProgramCache]: Analyzing trace with hash 261594826, now seen corresponding path program 1 times [2022-01-10 06:52:02,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:02,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999576764] [2022-01-10 06:52:02,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:02,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:02,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:02,405 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:02,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 06:52:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:02,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 06:52:02,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 25 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:05,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:07,318 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:07,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999576764] [2022-01-10 06:52:07,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999576764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:07,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:07,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20] total 43 [2022-01-10 06:52:07,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994846398] [2022-01-10 06:52:07,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:07,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-10 06:52:07,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:07,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-10 06:52:07,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 06:52:07,320 INFO L87 Difference]: Start difference. First operand 908 states and 1082 transitions. Second operand has 43 states, 43 states have (on average 5.116279069767442) internal successors, (220), 43 states have internal predecessors, (220), 0 states have call successors, (0), 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 06:52:08,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:08,228 INFO L93 Difference]: Finished difference Result 1528 states and 1842 transitions. [2022-01-10 06:52:08,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-10 06:52:08,229 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.116279069767442) internal successors, (220), 43 states have internal predecessors, (220), 0 states have call successors, (0), 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 115 [2022-01-10 06:52:08,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:08,231 INFO L225 Difference]: With dead ends: 1528 [2022-01-10 06:52:08,232 INFO L226 Difference]: Without dead ends: 1248 [2022-01-10 06:52:08,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=287, Invalid=2065, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 06:52:08,233 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 366 mSDsluCounter, 2442 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 2584 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:08,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 2584 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 442 Invalid, 0 Unknown, 217 Unchecked, 0.3s Time] [2022-01-10 06:52:08,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-01-10 06:52:08,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 921. [2022-01-10 06:52:08,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 1.1934782608695653) internal successors, (1098), 920 states have internal predecessors, (1098), 0 states have call successors, (0), 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 06:52:08,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1098 transitions. [2022-01-10 06:52:08,287 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1098 transitions. Word has length 115 [2022-01-10 06:52:08,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:08,287 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1098 transitions. [2022-01-10 06:52:08,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.116279069767442) internal successors, (220), 43 states have internal predecessors, (220), 0 states have call successors, (0), 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 06:52:08,288 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1098 transitions. [2022-01-10 06:52:08,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:52:08,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:08,288 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:08,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-01-10 06:52:08,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:08,489 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:08,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:08,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1445080891, now seen corresponding path program 1 times [2022-01-10 06:52:08,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:08,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300295153] [2022-01-10 06:52:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:08,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:08,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:08,491 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:08,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 06:52:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:08,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:52:08,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:09,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:10,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:10,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300295153] [2022-01-10 06:52:10,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300295153] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:10,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:10,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 06:52:10,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306440338] [2022-01-10 06:52:10,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:10,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:52:10,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:10,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:52:10,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:52:10,336 INFO L87 Difference]: Start difference. First operand 921 states and 1098 transitions. Second operand has 26 states, 26 states have (on average 8.5) internal successors, (221), 25 states have internal predecessors, (221), 0 states have call successors, (0), 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 06:52:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:10,514 INFO L93 Difference]: Finished difference Result 1410 states and 1718 transitions. [2022-01-10 06:52:10,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 06:52:10,515 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.5) internal successors, (221), 25 states have internal predecessors, (221), 0 states have call successors, (0), 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 115 [2022-01-10 06:52:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:10,518 INFO L225 Difference]: With dead ends: 1410 [2022-01-10 06:52:10,518 INFO L226 Difference]: Without dead ends: 976 [2022-01-10 06:52:10,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:52:10,519 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 198 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:10,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 1371 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 88 Unchecked, 0.0s Time] [2022-01-10 06:52:10,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-01-10 06:52:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 921. [2022-01-10 06:52:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 1.1934782608695653) internal successors, (1098), 920 states have internal predecessors, (1098), 0 states have call successors, (0), 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 06:52:10,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1098 transitions. [2022-01-10 06:52:10,572 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1098 transitions. Word has length 115 [2022-01-10 06:52:10,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:10,572 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1098 transitions. [2022-01-10 06:52:10,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.5) internal successors, (221), 25 states have internal predecessors, (221), 0 states have call successors, (0), 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 06:52:10,573 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1098 transitions. [2022-01-10 06:52:10,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:52:10,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:10,574 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:10,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:10,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:10,783 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:10,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:10,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1191890637, now seen corresponding path program 1 times [2022-01-10 06:52:10,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:10,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916132973] [2022-01-10 06:52:10,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:10,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:10,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:10,785 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:10,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 06:52:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:10,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 06:52:10,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 34 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:13,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:15,206 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:15,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916132973] [2022-01-10 06:52:15,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916132973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:15,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:15,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2022-01-10 06:52:15,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933424656] [2022-01-10 06:52:15,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:15,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-10 06:52:15,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:15,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-10 06:52:15,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1519, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 06:52:15,208 INFO L87 Difference]: Start difference. First operand 921 states and 1098 transitions. Second operand has 42 states, 42 states have (on average 5.238095238095238) internal successors, (220), 42 states have internal predecessors, (220), 0 states have call successors, (0), 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 06:52:16,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:16,046 INFO L93 Difference]: Finished difference Result 1526 states and 1842 transitions. [2022-01-10 06:52:16,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-10 06:52:16,047 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.238095238095238) internal successors, (220), 42 states have internal predecessors, (220), 0 states have call successors, (0), 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 115 [2022-01-10 06:52:16,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:16,050 INFO L225 Difference]: With dead ends: 1526 [2022-01-10 06:52:16,050 INFO L226 Difference]: Without dead ends: 1234 [2022-01-10 06:52:16,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 06:52:16,051 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 401 mSDsluCounter, 2778 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 2907 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:16,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 2907 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 463 Invalid, 0 Unknown, 308 Unchecked, 0.3s Time] [2022-01-10 06:52:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-01-10 06:52:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 927. [2022-01-10 06:52:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 1.193304535637149) internal successors, (1105), 926 states have internal predecessors, (1105), 0 states have call successors, (0), 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 06:52:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1105 transitions. [2022-01-10 06:52:16,108 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1105 transitions. Word has length 115 [2022-01-10 06:52:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:16,109 INFO L470 AbstractCegarLoop]: Abstraction has 927 states and 1105 transitions. [2022-01-10 06:52:16,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.238095238095238) internal successors, (220), 42 states have internal predecessors, (220), 0 states have call successors, (0), 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 06:52:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1105 transitions. [2022-01-10 06:52:16,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:52:16,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:16,110 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-01-10 06:52:16,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-01-10 06:52:16,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:16,311 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:16,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:16,311 INFO L85 PathProgramCache]: Analyzing trace with hash -800070656, now seen corresponding path program 1 times [2022-01-10 06:52:16,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:16,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674208214] [2022-01-10 06:52:16,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:16,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:16,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:16,313 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:16,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 06:52:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:16,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:52:16,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 06:52:17,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 06:52:17,410 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:17,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674208214] [2022-01-10 06:52:17,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674208214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:17,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:17,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:52:17,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917452856] [2022-01-10 06:52:17,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:17,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:52:17,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:17,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:52:17,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:52:17,411 INFO L87 Difference]: Start difference. First operand 927 states and 1105 transitions. Second operand has 16 states, 16 states have (on average 10.4375) internal successors, (167), 15 states have internal predecessors, (167), 0 states have call successors, (0), 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 06:52:17,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:17,598 INFO L93 Difference]: Finished difference Result 1954 states and 2411 transitions. [2022-01-10 06:52:17,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:52:17,598 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.4375) internal successors, (167), 15 states have internal predecessors, (167), 0 states have call successors, (0), 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 115 [2022-01-10 06:52:17,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:17,602 INFO L225 Difference]: With dead ends: 1954 [2022-01-10 06:52:17,603 INFO L226 Difference]: Without dead ends: 1494 [2022-01-10 06:52:17,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:52:17,604 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 117 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:17,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 944 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 84 Unchecked, 0.0s Time] [2022-01-10 06:52:17,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-01-10 06:52:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1472. [2022-01-10 06:52:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 1.2195785180149559) internal successors, (1794), 1471 states have internal predecessors, (1794), 0 states have call successors, (0), 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 06:52:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 1794 transitions. [2022-01-10 06:52:17,680 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 1794 transitions. Word has length 115 [2022-01-10 06:52:17,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:17,680 INFO L470 AbstractCegarLoop]: Abstraction has 1472 states and 1794 transitions. [2022-01-10 06:52:17,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.4375) internal successors, (167), 15 states have internal predecessors, (167), 0 states have call successors, (0), 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 06:52:17,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 1794 transitions. [2022-01-10 06:52:17,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:52:17,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:17,681 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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 06:52:17,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-01-10 06:52:17,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:17,882 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:17,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:17,882 INFO L85 PathProgramCache]: Analyzing trace with hash 241847234, now seen corresponding path program 1 times [2022-01-10 06:52:17,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:17,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580485432] [2022-01-10 06:52:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:17,883 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:17,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:17,884 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:17,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 06:52:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:17,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:52:17,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 06:52:18,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:52:18,425 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:18,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580485432] [2022-01-10 06:52:18,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580485432] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:52:18,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:52:18,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:52:18,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514249579] [2022-01-10 06:52:18,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:52:18,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:52:18,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:18,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:52:18,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:18,426 INFO L87 Difference]: Start difference. First operand 1472 states and 1794 transitions. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 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 06:52:18,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:18,525 INFO L93 Difference]: Finished difference Result 2496 states and 3100 transitions. [2022-01-10 06:52:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:52:18,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 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 115 [2022-01-10 06:52:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:18,530 INFO L225 Difference]: With dead ends: 2496 [2022-01-10 06:52:18,530 INFO L226 Difference]: Without dead ends: 1997 [2022-01-10 06:52:18,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:52:18,531 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 80 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:18,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 225 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 38 Unchecked, 0.0s Time] [2022-01-10 06:52:18,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2022-01-10 06:52:18,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1977. [2022-01-10 06:52:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1976 states have (on average 1.2231781376518218) internal successors, (2417), 1976 states have internal predecessors, (2417), 0 states have call successors, (0), 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 06:52:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2417 transitions. [2022-01-10 06:52:18,616 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2417 transitions. Word has length 115 [2022-01-10 06:52:18,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:18,616 INFO L470 AbstractCegarLoop]: Abstraction has 1977 states and 2417 transitions. [2022-01-10 06:52:18,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 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 06:52:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2417 transitions. [2022-01-10 06:52:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:52:18,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:18,618 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:18,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:18,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:18,827 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:18,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1726875513, now seen corresponding path program 1 times [2022-01-10 06:52:18,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:18,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047598049] [2022-01-10 06:52:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:18,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:18,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:18,829 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:18,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-01-10 06:52:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:18,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:52:18,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 53 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 06:52:19,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 53 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 06:52:20,064 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:20,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047598049] [2022-01-10 06:52:20,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047598049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:20,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:20,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:52:20,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486263552] [2022-01-10 06:52:20,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:20,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:52:20,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:20,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:52:20,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:52:20,066 INFO L87 Difference]: Start difference. First operand 1977 states and 2417 transitions. Second operand has 16 states, 16 states have (on average 11.6875) internal successors, (187), 15 states have internal predecessors, (187), 0 states have call successors, (0), 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 06:52:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:20,292 INFO L93 Difference]: Finished difference Result 3853 states and 4787 transitions. [2022-01-10 06:52:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:52:20,292 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.6875) internal successors, (187), 15 states have internal predecessors, (187), 0 states have call successors, (0), 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 115 [2022-01-10 06:52:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:20,300 INFO L225 Difference]: With dead ends: 3853 [2022-01-10 06:52:20,300 INFO L226 Difference]: Without dead ends: 2971 [2022-01-10 06:52:20,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:52:20,302 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 89 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:20,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 948 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 96 Unchecked, 0.0s Time] [2022-01-10 06:52:20,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2971 states. [2022-01-10 06:52:20,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2971 to 2951. [2022-01-10 06:52:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2951 states, 2950 states have (on average 1.2291525423728813) internal successors, (3626), 2950 states have internal predecessors, (3626), 0 states have call successors, (0), 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 06:52:20,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 3626 transitions. [2022-01-10 06:52:20,444 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 3626 transitions. Word has length 115 [2022-01-10 06:52:20,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:20,444 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 3626 transitions. [2022-01-10 06:52:20,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.6875) internal successors, (187), 15 states have internal predecessors, (187), 0 states have call successors, (0), 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 06:52:20,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 3626 transitions. [2022-01-10 06:52:20,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:52:20,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:20,447 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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 06:52:20,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-01-10 06:52:20,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:20,655 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:20,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:20,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1903481417, now seen corresponding path program 1 times [2022-01-10 06:52:20,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:20,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969558876] [2022-01-10 06:52:20,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:20,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:20,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:20,658 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:20,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-01-10 06:52:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:20,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:52:20,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 06:52:21,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:52:21,196 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:21,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969558876] [2022-01-10 06:52:21,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969558876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:52:21,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:52:21,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:52:21,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050223693] [2022-01-10 06:52:21,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:52:21,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:52:21,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:21,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:52:21,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:21,197 INFO L87 Difference]: Start difference. First operand 2951 states and 3626 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 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 06:52:21,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:21,347 INFO L93 Difference]: Finished difference Result 4059 states and 5005 transitions. [2022-01-10 06:52:21,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:52:21,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 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 115 [2022-01-10 06:52:21,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:21,354 INFO L225 Difference]: With dead ends: 4059 [2022-01-10 06:52:21,354 INFO L226 Difference]: Without dead ends: 3055 [2022-01-10 06:52:21,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:52:21,355 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 68 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:21,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 270 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2022-01-10 06:52:21,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2022-01-10 06:52:21,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 2951. [2022-01-10 06:52:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2951 states, 2950 states have (on average 1.2210169491525424) internal successors, (3602), 2950 states have internal predecessors, (3602), 0 states have call successors, (0), 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 06:52:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 3602 transitions. [2022-01-10 06:52:21,502 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 3602 transitions. Word has length 115 [2022-01-10 06:52:21,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:21,502 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 3602 transitions. [2022-01-10 06:52:21,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 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 06:52:21,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 3602 transitions. [2022-01-10 06:52:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:52:21,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:21,504 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-01-10 06:52:21,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-01-10 06:52:21,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:21,705 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:21,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:21,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1966249824, now seen corresponding path program 1 times [2022-01-10 06:52:21,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:21,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871663833] [2022-01-10 06:52:21,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:21,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:21,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:21,707 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:21,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-01-10 06:52:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:21,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:52:21,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 30 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 06:52:22,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 30 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 06:52:22,876 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:22,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871663833] [2022-01-10 06:52:22,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871663833] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:22,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:22,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:52:22,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992139610] [2022-01-10 06:52:22,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:22,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:52:22,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:22,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:52:22,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:52:22,878 INFO L87 Difference]: Start difference. First operand 2951 states and 3602 transitions. Second operand has 16 states, 16 states have (on average 11.8125) internal successors, (189), 15 states have internal predecessors, (189), 0 states have call successors, (0), 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 06:52:23,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:23,289 INFO L93 Difference]: Finished difference Result 5879 states and 7259 transitions. [2022-01-10 06:52:23,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:52:23,290 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 15 states have internal predecessors, (189), 0 states have call successors, (0), 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 115 [2022-01-10 06:52:23,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:23,297 INFO L225 Difference]: With dead ends: 5879 [2022-01-10 06:52:23,297 INFO L226 Difference]: Without dead ends: 4973 [2022-01-10 06:52:23,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:52:23,298 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 149 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:23,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 761 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 68 Unchecked, 0.0s Time] [2022-01-10 06:52:23,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4973 states.