/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 05:16:03,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 05:16:03,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 05:16:03,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 05:16:03,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 05:16:03,851 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 05:16:03,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 05:16:03,852 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 05:16:03,852 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 05:16:03,853 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 05:16:03,853 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 05:16:03,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 05:16:03,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 05:16:03,853 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 05:16:03,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 05:16:03,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 05:16:03,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 05:16:03,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 05:16:03,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 05:16:03,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 05:16:03,854 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 05:16:03,854 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 05:16:03,854 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 05:16:03,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 05:16:03,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 05:16:03,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 05:16:03,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 05:16:03,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 05:16:03,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 05:16:03,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 05:16:03,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 05:16:03,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 05:16:03,862 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 05:16:03,862 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 05:16:03,862 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 05:16:03,863 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 05:16:03,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 05:16:03,863 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 05:16:03,863 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 05:16:04,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 05:16:04,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 05:16:04,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 05:16:04,074 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 05:16:04,074 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 05:16:04,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label16.c [2022-01-10 05:16:04,125 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfa0d3a2b/e2ef30f3cc5747d5b0c1cc20c335016d/FLAG9fa7d50a7 [2022-01-10 05:16:04,573 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 05:16:04,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label16.c [2022-01-10 05:16:04,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfa0d3a2b/e2ef30f3cc5747d5b0c1cc20c335016d/FLAG9fa7d50a7 [2022-01-10 05:16:05,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfa0d3a2b/e2ef30f3cc5747d5b0c1cc20c335016d [2022-01-10 05:16:05,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 05:16:05,110 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 05:16:05,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 05:16:05,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 05:16:05,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 05:16:05,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:16:05" (1/1) ... [2022-01-10 05:16:05,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69017173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:05, skipping insertion in model container [2022-01-10 05:16:05,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:16:05" (1/1) ... [2022-01-10 05:16:05,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 05:16:05,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 05:16:05,353 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label16.c[4807,4820] [2022-01-10 05:16:05,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 05:16:05,574 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 05:16:05,598 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label16.c[4807,4820] [2022-01-10 05:16:05,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 05:16:05,704 INFO L208 MainTranslator]: Completed translation [2022-01-10 05:16:05,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:05 WrapperNode [2022-01-10 05:16:05,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 05:16:05,706 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 05:16:05,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 05:16:05,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 05:16:05,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:05" (1/1) ... [2022-01-10 05:16:05,738 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:05" (1/1) ... [2022-01-10 05:16:05,812 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 856 [2022-01-10 05:16:05,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 05:16:05,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 05:16:05,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 05:16:05,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 05:16:05,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:05" (1/1) ... [2022-01-10 05:16:05,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:05" (1/1) ... [2022-01-10 05:16:05,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:05" (1/1) ... [2022-01-10 05:16:05,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:05" (1/1) ... [2022-01-10 05:16:05,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:05" (1/1) ... [2022-01-10 05:16:05,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:05" (1/1) ... [2022-01-10 05:16:05,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:05" (1/1) ... [2022-01-10 05:16:05,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 05:16:05,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 05:16:05,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 05:16:05,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 05:16:05,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:05" (1/1) ... [2022-01-10 05:16:05,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 05:16:05,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 05:16:05,916 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 05:16:05,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 05:16:05,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 05:16:05,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 05:16:05,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 05:16:05,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 05:16:06,019 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 05:16:06,021 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 05:16:08,427 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 05:16:08,436 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 05:16:08,436 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 05:16:08,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:16:08 BoogieIcfgContainer [2022-01-10 05:16:08,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 05:16:08,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 05:16:08,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 05:16:08,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 05:16:08,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 05:16:05" (1/3) ... [2022-01-10 05:16:08,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db79f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:16:08, skipping insertion in model container [2022-01-10 05:16:08,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:05" (2/3) ... [2022-01-10 05:16:08,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db79f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:16:08, skipping insertion in model container [2022-01-10 05:16:08,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:16:08" (3/3) ... [2022-01-10 05:16:08,448 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label16.c [2022-01-10 05:16:08,457 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 05:16:08,457 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 05:16:08,494 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 05:16:08,499 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 05:16:08,500 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 05:16:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 05:16:08,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:16:08,523 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:16:08,523 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:16:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:16:08,527 INFO L85 PathProgramCache]: Analyzing trace with hash 291089130, now seen corresponding path program 1 times [2022-01-10 05:16:08,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:16:08,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894673717] [2022-01-10 05:16:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:16:08,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:16:08,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:16:08,551 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:16:08,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 05:16:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:16:08,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:16:08,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:16:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:16:08,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:16:08,832 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:16:08,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894673717] [2022-01-10 05:16:08,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894673717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:16:08,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:16:08,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:16:08,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733982612] [2022-01-10 05:16:08,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:16:08,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:16:08,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:16:08,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:16:08,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:16:08,867 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:16:11,682 INFO L93 Difference]: Finished difference Result 669 states and 1200 transitions. [2022-01-10 05:16:11,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:16:11,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2022-01-10 05:16:11,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:16:11,697 INFO L225 Difference]: With dead ends: 669 [2022-01-10 05:16:11,697 INFO L226 Difference]: Without dead ends: 360 [2022-01-10 05:16:11,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:16:11,703 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-10 05:16:11,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 132 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-10 05:16:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-01-10 05:16:11,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2022-01-10 05:16:11,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.4540389972144847) internal successors, (522), 359 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:11,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 522 transitions. [2022-01-10 05:16:11,753 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 522 transitions. Word has length 46 [2022-01-10 05:16:11,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:16:11,753 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 522 transitions. [2022-01-10 05:16:11,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:11,754 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 522 transitions. [2022-01-10 05:16:11,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 05:16:11,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:16:11,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:16:11,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 05:16:11,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:16:11,966 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:16:11,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:16:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash -518462119, now seen corresponding path program 1 times [2022-01-10 05:16:11,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:16:11,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78173290] [2022-01-10 05:16:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:16:11,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:16:11,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:16:11,969 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:16:11,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 05:16:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:16:12,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:16:12,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:16:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:16:12,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:16:12,245 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:16:12,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78173290] [2022-01-10 05:16:12,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78173290] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:16:12,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:16:12,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:16:12,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226194212] [2022-01-10 05:16:12,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:16:12,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:16:12,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:16:12,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:16:12,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:16:12,254 INFO L87 Difference]: Start difference. First operand 360 states and 522 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:16:14,791 INFO L93 Difference]: Finished difference Result 1074 states and 1561 transitions. [2022-01-10 05:16:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:16:14,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2022-01-10 05:16:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:16:14,799 INFO L225 Difference]: With dead ends: 1074 [2022-01-10 05:16:14,799 INFO L226 Difference]: Without dead ends: 716 [2022-01-10 05:16:14,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:16:14,801 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 118 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-10 05:16:14,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 102 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-10 05:16:14,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-01-10 05:16:14,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2022-01-10 05:16:14,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.3454545454545455) internal successors, (962), 715 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 962 transitions. [2022-01-10 05:16:14,842 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 962 transitions. Word has length 112 [2022-01-10 05:16:14,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:16:14,842 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 962 transitions. [2022-01-10 05:16:14,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:14,843 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 962 transitions. [2022-01-10 05:16:14,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 05:16:14,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:16:14,846 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:16:14,855 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 05:16:15,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:16:15,052 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:16:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:16:15,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1951851956, now seen corresponding path program 1 times [2022-01-10 05:16:15,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:16:15,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510879476] [2022-01-10 05:16:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:16:15,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:16:15,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:16:15,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:16:15,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 05:16:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:16:15,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:16:15,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:16:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:16:15,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:16:15,327 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:16:15,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510879476] [2022-01-10 05:16:15,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510879476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:16:15,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:16:15,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:16:15,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493469439] [2022-01-10 05:16:15,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:16:15,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:16:15,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:16:15,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:16:15,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:16:15,329 INFO L87 Difference]: Start difference. First operand 716 states and 962 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:16:17,612 INFO L93 Difference]: Finished difference Result 1964 states and 2655 transitions. [2022-01-10 05:16:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:16:17,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 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 05:16:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:16:17,617 INFO L225 Difference]: With dead ends: 1964 [2022-01-10 05:16:17,617 INFO L226 Difference]: Without dead ends: 1250 [2022-01-10 05:16:17,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:16:17,620 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 129 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 05:16:17,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 89 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 05:16:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-01-10 05:16:17,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250. [2022-01-10 05:16:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 1.245796637309848) internal successors, (1556), 1249 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1556 transitions. [2022-01-10 05:16:17,646 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1556 transitions. Word has length 114 [2022-01-10 05:16:17,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:16:17,646 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1556 transitions. [2022-01-10 05:16:17,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:17,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1556 transitions. [2022-01-10 05:16:17,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-10 05:16:17,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:16:17,651 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:16:17,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 05:16:17,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:16:17,859 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:16:17,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:16:17,860 INFO L85 PathProgramCache]: Analyzing trace with hash 102630666, now seen corresponding path program 1 times [2022-01-10 05:16:17,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:16:17,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124424565] [2022-01-10 05:16:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:16:17,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:16:17,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:16:17,862 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:16:17,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 05:16:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:16:17,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 05:16:17,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:16:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 05:16:18,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:16:18,555 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:16:18,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124424565] [2022-01-10 05:16:18,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124424565] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:16:18,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:16:18,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:16:18,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802950012] [2022-01-10 05:16:18,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:16:18,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 05:16:18,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:16:18,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 05:16:18,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:16:18,557 INFO L87 Difference]: Start difference. First operand 1250 states and 1556 transitions. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:20,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:16:20,917 INFO L93 Difference]: Finished difference Result 2171 states and 2741 transitions. [2022-01-10 05:16:20,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 05:16:20,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 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 195 [2022-01-10 05:16:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:16:20,922 INFO L225 Difference]: With dead ends: 2171 [2022-01-10 05:16:20,922 INFO L226 Difference]: Without dead ends: 1072 [2022-01-10 05:16:20,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:16:20,924 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 103 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-10 05:16:20,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 114 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-10 05:16:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2022-01-10 05:16:20,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2022-01-10 05:16:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.239028944911298) internal successors, (1327), 1071 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:20,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1327 transitions. [2022-01-10 05:16:20,943 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1327 transitions. Word has length 195 [2022-01-10 05:16:20,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:16:20,943 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1327 transitions. [2022-01-10 05:16:20,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:20,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1327 transitions. [2022-01-10 05:16:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-10 05:16:20,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:16:20,946 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:16:20,963 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 05:16:21,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:16:21,156 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:16:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:16:21,157 INFO L85 PathProgramCache]: Analyzing trace with hash 885278667, now seen corresponding path program 1 times [2022-01-10 05:16:21,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:16:21,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165838522] [2022-01-10 05:16:21,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:16:21,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:16:21,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:16:21,160 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:16:21,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 05:16:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:16:21,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 05:16:21,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:16:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-10 05:16:22,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:16:22,181 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:16:22,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165838522] [2022-01-10 05:16:22,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165838522] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:16:22,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:16:22,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:16:22,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866199246] [2022-01-10 05:16:22,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:16:22,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:16:22,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:16:22,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:16:22,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:16:22,183 INFO L87 Difference]: Start difference. First operand 1072 states and 1327 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:23,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:16:23,996 INFO L93 Difference]: Finished difference Result 1786 states and 2287 transitions. [2022-01-10 05:16:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:16:23,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2022-01-10 05:16:23,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:16:24,001 INFO L225 Difference]: With dead ends: 1786 [2022-01-10 05:16:24,001 INFO L226 Difference]: Without dead ends: 1072 [2022-01-10 05:16:24,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:16:24,003 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 73 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-10 05:16:24,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 123 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-10 05:16:24,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2022-01-10 05:16:24,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2022-01-10 05:16:24,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.2334267040149394) internal successors, (1321), 1071 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1321 transitions. [2022-01-10 05:16:24,022 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1321 transitions. Word has length 221 [2022-01-10 05:16:24,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:16:24,022 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1321 transitions. [2022-01-10 05:16:24,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:24,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1321 transitions. [2022-01-10 05:16:24,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-01-10 05:16:24,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:16:24,027 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:16:24,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 05:16:24,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:16:24,237 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:16:24,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:16:24,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1889841477, now seen corresponding path program 1 times [2022-01-10 05:16:24,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:16:24,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023172141] [2022-01-10 05:16:24,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:16:24,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:16:24,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:16:24,240 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:16:24,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 05:16:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:16:24,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 05:16:24,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:16:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 131 proven. 135 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-01-10 05:16:24,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:16:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-01-10 05:16:25,710 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:16:25,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023172141] [2022-01-10 05:16:25,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023172141] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 05:16:25,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 05:16:25,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 05:16:25,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669174667] [2022-01-10 05:16:25,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:16:25,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:16:25,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:16:25,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:16:25,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 05:16:25,712 INFO L87 Difference]: Start difference. First operand 1072 states and 1321 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:30,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:16:30,989 INFO L93 Difference]: Finished difference Result 2142 states and 2812 transitions. [2022-01-10 05:16:30,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:16:30,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 325 [2022-01-10 05:16:30,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:16:30,995 INFO L225 Difference]: With dead ends: 2142 [2022-01-10 05:16:30,995 INFO L226 Difference]: Without dead ends: 1428 [2022-01-10 05:16:30,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 05:16:30,999 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 133 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-01-10 05:16:30,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 59 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-01-10 05:16:31,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2022-01-10 05:16:31,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1428. [2022-01-10 05:16:31,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 1.238262088297127) internal successors, (1767), 1427 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1767 transitions. [2022-01-10 05:16:31,020 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1767 transitions. Word has length 325 [2022-01-10 05:16:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:16:31,020 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 1767 transitions. [2022-01-10 05:16:31,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:31,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1767 transitions. [2022-01-10 05:16:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-01-10 05:16:31,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:16:31,027 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:16:31,039 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 05:16:31,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:16:31,239 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:16:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:16:31,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1537841512, now seen corresponding path program 1 times [2022-01-10 05:16:31,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:16:31,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146638445] [2022-01-10 05:16:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:16:31,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:16:31,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:16:31,242 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:16:31,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 05:16:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:16:31,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 05:16:31,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:16:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 408 proven. 159 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-01-10 05:16:32,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:16:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 567 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-01-10 05:16:33,157 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:16:33,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146638445] [2022-01-10 05:16:33,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146638445] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 05:16:33,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 05:16:33,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 05:16:33,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904436565] [2022-01-10 05:16:33,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:16:33,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:16:33,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:16:33,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:16:33,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 05:16:33,160 INFO L87 Difference]: Start difference. First operand 1428 states and 1767 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:38,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:16:38,064 INFO L93 Difference]: Finished difference Result 3210 states and 4150 transitions. [2022-01-10 05:16:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:16:38,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 436 [2022-01-10 05:16:38,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:16:38,071 INFO L225 Difference]: With dead ends: 3210 [2022-01-10 05:16:38,071 INFO L226 Difference]: Without dead ends: 2140 [2022-01-10 05:16:38,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 05:16:38,073 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 113 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-01-10 05:16:38,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 248 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-01-10 05:16:38,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2022-01-10 05:16:38,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2140. [2022-01-10 05:16:38,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 1.2463768115942029) internal successors, (2666), 2139 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:38,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2666 transitions. [2022-01-10 05:16:38,106 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2666 transitions. Word has length 436 [2022-01-10 05:16:38,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:16:38,107 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 2666 transitions. [2022-01-10 05:16:38,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:38,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2666 transitions. [2022-01-10 05:16:38,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2022-01-10 05:16:38,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:16:38,110 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:16:38,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 05:16:38,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:16:38,322 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:16:38,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:16:38,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1867510464, now seen corresponding path program 1 times [2022-01-10 05:16:38,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:16:38,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225068616] [2022-01-10 05:16:38,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:16:38,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:16:38,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:16:38,328 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:16:38,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 05:16:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:16:38,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 05:16:38,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:16:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 367 proven. 277 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-01-10 05:16:39,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:16:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 615 proven. 29 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-01-10 05:16:44,896 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:16:44,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225068616] [2022-01-10 05:16:44,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225068616] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:16:44,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:16:44,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-01-10 05:16:44,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824912824] [2022-01-10 05:16:44,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:16:44,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 05:16:44,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:16:44,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 05:16:44,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 05:16:44,898 INFO L87 Difference]: Start difference. First operand 2140 states and 2666 transitions. Second operand has 7 states, 7 states have (on average 81.28571428571429) internal successors, (569), 7 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:17:10,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:17:10,476 INFO L93 Difference]: Finished difference Result 5642 states and 7166 transitions. [2022-01-10 05:17:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 05:17:10,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 81.28571428571429) internal successors, (569), 7 states have internal predecessors, (569), 0 states have call successors, (0), 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 452 [2022-01-10 05:17:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:17:10,489 INFO L225 Difference]: With dead ends: 5642 [2022-01-10 05:17:10,489 INFO L226 Difference]: Without dead ends: 3744 [2022-01-10 05:17:10,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 899 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-10 05:17:10,492 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 445 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.3s IncrementalHoareTripleChecker+Time [2022-01-10 05:17:10,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 53 Invalid, 2564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 25.3s Time] [2022-01-10 05:17:10,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3744 states. [2022-01-10 05:17:10,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3744 to 3742. [2022-01-10 05:17:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3742 states, 3741 states have (on average 1.1082598235765837) internal successors, (4146), 3741 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:17:10,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 4146 transitions. [2022-01-10 05:17:10,557 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 4146 transitions. Word has length 452 [2022-01-10 05:17:10,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:17:10,558 INFO L470 AbstractCegarLoop]: Abstraction has 3742 states and 4146 transitions. [2022-01-10 05:17:10,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.28571428571429) internal successors, (569), 7 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:17:10,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 4146 transitions. [2022-01-10 05:17:10,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2022-01-10 05:17:10,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:17:10,564 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:17:10,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 05:17:10,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:17:10,776 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:17:10,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:17:10,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1983408847, now seen corresponding path program 1 times [2022-01-10 05:17:10,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:17:10,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687617175] [2022-01-10 05:17:10,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:17:10,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:17:10,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:17:10,779 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:17:10,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 05:17:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:17:10,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 05:17:10,979 INFO L286 TraceCheckSpWp]: Computing forward predicates...