/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-var-start-time.3.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:49:13,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:49:13,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:49:13,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:49:13,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:49:13,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:49:13,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:49:13,175 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 06:49:13,201 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:49:13,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:49:13,202 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:49:13,202 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:49:13,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:49:13,203 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:49:13,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:49:13,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:49:13,203 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:49:13,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:49:13,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:49:13,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:49:13,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:49:13,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:49:13,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:49:13,204 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:49:13,204 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:49:13,204 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:49:13,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:49:13,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:49:13,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:49:13,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:49:13,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:49:13,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:49:13,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:49:13,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:49:13,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:49:13,206 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:49:13,206 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:49:13,206 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:49:13,206 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:49:13,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:49:13,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:49:13,207 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:49:13,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:49:13,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:49:13,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:49:13,435 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:49:13,435 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:49:13,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2022-01-10 06:49:13,488 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a8001390/1638eab479f3495e80131dcdef9c5002/FLAGb7958d946 [2022-01-10 06:49:13,841 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:49:13,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2022-01-10 06:49:13,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a8001390/1638eab479f3495e80131dcdef9c5002/FLAGb7958d946 [2022-01-10 06:49:13,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a8001390/1638eab479f3495e80131dcdef9c5002 [2022-01-10 06:49:13,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:49:13,867 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:49:13,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:49:13,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:49:13,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:49:13,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:49:13" (1/1) ... [2022-01-10 06:49:13,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a3b410e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:49:13, skipping insertion in model container [2022-01-10 06:49:13,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:49:13" (1/1) ... [2022-01-10 06:49:13,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:49:13,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:49:14,143 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-var-start-time.3.1.ufo.UNBOUNDED.pals.c[6940,6953] [2022-01-10 06:49:14,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:49:14,155 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:49:14,191 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-var-start-time.3.1.ufo.UNBOUNDED.pals.c[6940,6953] [2022-01-10 06:49:14,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:49:14,201 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:49:14,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:49:14 WrapperNode [2022-01-10 06:49:14,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:49:14,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:49:14,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:49:14,202 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:49:14,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:49:14" (1/1) ... [2022-01-10 06:49:14,218 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:49:14" (1/1) ... [2022-01-10 06:49:14,235 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 242 [2022-01-10 06:49:14,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:49:14,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:49:14,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:49:14,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:49:14,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:49:14" (1/1) ... [2022-01-10 06:49:14,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:49:14" (1/1) ... [2022-01-10 06:49:14,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:49:14" (1/1) ... [2022-01-10 06:49:14,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:49:14" (1/1) ... [2022-01-10 06:49:14,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:49:14" (1/1) ... [2022-01-10 06:49:14,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:49:14" (1/1) ... [2022-01-10 06:49:14,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:49:14" (1/1) ... [2022-01-10 06:49:14,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:49:14,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:49:14,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:49:14,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:49:14,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:49:14" (1/1) ... [2022-01-10 06:49:14,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:49:14,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:49:14,302 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 06:49:14,310 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 06:49:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:49:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:49:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:49:14,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:49:14,438 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:49:14,440 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:49:14,769 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:49:14,775 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:49:14,776 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:49:14,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:49:14 BoogieIcfgContainer [2022-01-10 06:49:14,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:49:14,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:49:14,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:49:14,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:49:14,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:49:13" (1/3) ... [2022-01-10 06:49:14,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dc844ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:49:14, skipping insertion in model container [2022-01-10 06:49:14,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:49:14" (2/3) ... [2022-01-10 06:49:14,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dc844ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:49:14, skipping insertion in model container [2022-01-10 06:49:14,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:49:14" (3/3) ... [2022-01-10 06:49:14,789 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2022-01-10 06:49:14,793 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:49:14,794 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:49:14,830 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:49:14,836 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 06:49:14,836 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:49:14,847 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 79 states have (on average 1.6708860759493671) internal successors, (132), 80 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 06:49:14,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:14,854 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] [2022-01-10 06:49:14,855 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:14,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1546658209, now seen corresponding path program 1 times [2022-01-10 06:49:14,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:14,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711978374] [2022-01-10 06:49:14,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:14,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:14,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:14,874 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 06:49:14,875 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 06:49:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:14,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:49:14,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:15,071 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 06:49:15,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:15,072 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:15,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711978374] [2022-01-10 06:49:15,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711978374] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:15,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:15,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:49:15,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781266426] [2022-01-10 06:49:15,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:15,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:49:15,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:15,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:49:15,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:49:15,102 INFO L87 Difference]: Start difference. First operand has 81 states, 79 states have (on average 1.6708860759493671) internal successors, (132), 80 states have internal predecessors, (132), 0 states have call successors, (0), 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 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:15,183 INFO L93 Difference]: Finished difference Result 139 states and 225 transitions. [2022-01-10 06:49:15,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:49:15,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2022-01-10 06:49:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:15,192 INFO L225 Difference]: With dead ends: 139 [2022-01-10 06:49:15,193 INFO L226 Difference]: Without dead ends: 77 [2022-01-10 06:49:15,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 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 06:49:15,198 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 3 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:15,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 472 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:15,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-10 06:49:15,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-01-10 06:49:15,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.4210526315789473) internal successors, (108), 76 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:15,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 108 transitions. [2022-01-10 06:49:15,228 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 108 transitions. Word has length 26 [2022-01-10 06:49:15,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:15,229 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 108 transitions. [2022-01-10 06:49:15,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:15,229 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 108 transitions. [2022-01-10 06:49:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 06:49:15,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:15,230 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 06:49:15,237 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 06:49:15,437 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 06:49:15,437 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:15,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1146437097, now seen corresponding path program 1 times [2022-01-10 06:49:15,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:15,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446226823] [2022-01-10 06:49:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:15,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:15,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:15,440 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 06:49:15,442 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 06:49:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:15,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:49:15,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:15,586 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 06:49:15,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:15,586 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:15,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446226823] [2022-01-10 06:49:15,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446226823] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:15,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:15,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:49:15,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833266659] [2022-01-10 06:49:15,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:15,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:49:15,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:15,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:49:15,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:49:15,588 INFO L87 Difference]: Start difference. First operand 77 states and 108 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 06:49:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:15,602 INFO L93 Difference]: Finished difference Result 173 states and 258 transitions. [2022-01-10 06:49:15,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:49:15,603 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 06:49:15,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:15,604 INFO L225 Difference]: With dead ends: 173 [2022-01-10 06:49:15,604 INFO L226 Difference]: Without dead ends: 119 [2022-01-10 06:49:15,605 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 06:49:15,605 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 68 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 223 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 06:49:15,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 223 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:15,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-10 06:49:15,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-01-10 06:49:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 171 transitions. [2022-01-10 06:49:15,613 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 171 transitions. Word has length 42 [2022-01-10 06:49:15,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:15,613 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 171 transitions. [2022-01-10 06:49:15,613 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 06:49:15,614 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 171 transitions. [2022-01-10 06:49:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 06:49:15,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:15,614 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 06:49:15,621 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 06:49:15,821 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 06:49:15,821 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:15,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:15,822 INFO L85 PathProgramCache]: Analyzing trace with hash 983172312, now seen corresponding path program 1 times [2022-01-10 06:49:15,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:15,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798480117] [2022-01-10 06:49:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:15,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:15,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:15,824 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 06:49:15,825 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 06:49:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:15,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:49:15,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:15,957 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 06:49:15,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:15,957 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:15,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798480117] [2022-01-10 06:49:15,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798480117] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:15,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:15,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:49:15,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298310619] [2022-01-10 06:49:15,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:15,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:49:15,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:15,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:49:15,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:49:15,959 INFO L87 Difference]: Start difference. First operand 117 states and 171 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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 06:49:15,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:15,998 INFO L93 Difference]: Finished difference Result 281 states and 427 transitions. [2022-01-10 06:49:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:49:16,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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 06:49:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:16,002 INFO L225 Difference]: With dead ends: 281 [2022-01-10 06:49:16,002 INFO L226 Difference]: Without dead ends: 187 [2022-01-10 06:49:16,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 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 06:49:16,003 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 63 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 214 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 06:49:16,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 214 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:16,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-10 06:49:16,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2022-01-10 06:49:16,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.5) internal successors, (276), 184 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:16,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 276 transitions. [2022-01-10 06:49:16,030 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 276 transitions. Word has length 43 [2022-01-10 06:49:16,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:16,030 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 276 transitions. [2022-01-10 06:49:16,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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 06:49:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 276 transitions. [2022-01-10 06:49:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 06:49:16,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:16,031 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 06:49:16,042 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 06:49:16,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:49:16,238 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:16,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:16,238 INFO L85 PathProgramCache]: Analyzing trace with hash -14404519, now seen corresponding path program 1 times [2022-01-10 06:49:16,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:16,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66034653] [2022-01-10 06:49:16,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:16,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:16,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:16,240 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 06:49:16,242 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 06:49:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:16,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:49:16,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:16,404 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 06:49:16,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:16,405 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:16,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66034653] [2022-01-10 06:49:16,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66034653] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:16,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:16,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:49:16,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845994163] [2022-01-10 06:49:16,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:16,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:49:16,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:16,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:49:16,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:49:16,409 INFO L87 Difference]: Start difference. First operand 185 states and 276 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 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 06:49:16,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:16,456 INFO L93 Difference]: Finished difference Result 623 states and 953 transitions. [2022-01-10 06:49:16,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:49:16,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 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 06:49:16,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:16,459 INFO L225 Difference]: With dead ends: 623 [2022-01-10 06:49:16,460 INFO L226 Difference]: Without dead ends: 461 [2022-01-10 06:49:16,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 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 06:49:16,461 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 293 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:16,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 302 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-10 06:49:16,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 457. [2022-01-10 06:49:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.5219298245614035) internal successors, (694), 456 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 694 transitions. [2022-01-10 06:49:16,507 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 694 transitions. Word has length 44 [2022-01-10 06:49:16,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:16,508 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 694 transitions. [2022-01-10 06:49:16,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 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 06:49:16,508 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 694 transitions. [2022-01-10 06:49:16,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 06:49:16,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:16,509 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] [2022-01-10 06:49:16,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 06:49:16,717 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 06:49:16,718 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:16,719 INFO L85 PathProgramCache]: Analyzing trace with hash 795739509, now seen corresponding path program 1 times [2022-01-10 06:49:16,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:16,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146232988] [2022-01-10 06:49:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:16,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:16,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:16,720 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 06:49:16,722 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 06:49:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:16,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:49:16,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:16,895 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 06:49:16,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:16,896 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:16,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146232988] [2022-01-10 06:49:16,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146232988] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:16,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:16,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:49:16,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503002750] [2022-01-10 06:49:16,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:16,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:49:16,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:16,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:49:16,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:49:16,912 INFO L87 Difference]: Start difference. First operand 457 states and 694 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:16,934 INFO L93 Difference]: Finished difference Result 1169 states and 1780 transitions. [2022-01-10 06:49:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:49:16,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2022-01-10 06:49:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:16,937 INFO L225 Difference]: With dead ends: 1169 [2022-01-10 06:49:16,937 INFO L226 Difference]: Without dead ends: 735 [2022-01-10 06:49:16,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 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 06:49:16,939 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 70 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 242 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 06:49:16,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 242 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:16,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-01-10 06:49:16,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 733. [2022-01-10 06:49:16,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 1.4972677595628416) internal successors, (1096), 732 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1096 transitions. [2022-01-10 06:49:16,961 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1096 transitions. Word has length 45 [2022-01-10 06:49:16,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:16,962 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 1096 transitions. [2022-01-10 06:49:16,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1096 transitions. [2022-01-10 06:49:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 06:49:16,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:16,963 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] [2022-01-10 06:49:16,976 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 06:49:17,169 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 06:49:17,170 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:17,170 INFO L85 PathProgramCache]: Analyzing trace with hash -220386493, now seen corresponding path program 1 times [2022-01-10 06:49:17,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:17,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052072401] [2022-01-10 06:49:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:17,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:17,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:17,172 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 06:49:17,172 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 06:49:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:17,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:49:17,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:17,466 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 06:49:17,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:17,467 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:17,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052072401] [2022-01-10 06:49:17,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052072401] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:17,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:17,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:49:17,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859082277] [2022-01-10 06:49:17,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:17,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:49:17,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:17,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:49:17,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:49:17,468 INFO L87 Difference]: Start difference. First operand 733 states and 1096 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:17,538 INFO L93 Difference]: Finished difference Result 2897 states and 4364 transitions. [2022-01-10 06:49:17,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:49:17,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2022-01-10 06:49:17,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:17,546 INFO L225 Difference]: With dead ends: 2897 [2022-01-10 06:49:17,547 INFO L226 Difference]: Without dead ends: 2187 [2022-01-10 06:49:17,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 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 06:49:17,549 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 356 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:17,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 416 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:17,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2022-01-10 06:49:17,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1441. [2022-01-10 06:49:17,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 1.4722222222222223) internal successors, (2120), 1440 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2120 transitions. [2022-01-10 06:49:17,590 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2120 transitions. Word has length 45 [2022-01-10 06:49:17,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:17,590 INFO L470 AbstractCegarLoop]: Abstraction has 1441 states and 2120 transitions. [2022-01-10 06:49:17,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:17,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2120 transitions. [2022-01-10 06:49:17,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 06:49:17,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:17,591 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 06:49:17,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 06:49:17,797 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 06:49:17,798 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:17,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1374629896, now seen corresponding path program 1 times [2022-01-10 06:49:17,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:17,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523095773] [2022-01-10 06:49:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:17,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:17,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:17,800 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 06:49:17,801 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 06:49:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:17,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:49:17,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:17,915 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 06:49:17,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:17,915 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:17,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523095773] [2022-01-10 06:49:17,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523095773] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:17,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:17,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:49:17,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121905228] [2022-01-10 06:49:17,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:17,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:49:17,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:17,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:49:17,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:49:17,917 INFO L87 Difference]: Start difference. First operand 1441 states and 2120 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 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 06:49:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:18,047 INFO L93 Difference]: Finished difference Result 3051 states and 4409 transitions. [2022-01-10 06:49:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:49:18,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 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 06:49:18,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:18,057 INFO L225 Difference]: With dead ends: 3051 [2022-01-10 06:49:18,057 INFO L226 Difference]: Without dead ends: 3049 [2022-01-10 06:49:18,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 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 06:49:18,059 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 234 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:18,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 467 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:18,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2022-01-10 06:49:18,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1585. [2022-01-10 06:49:18,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 1.4292929292929293) internal successors, (2264), 1584 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:18,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2264 transitions. [2022-01-10 06:49:18,124 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2264 transitions. Word has length 46 [2022-01-10 06:49:18,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:18,125 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 2264 transitions. [2022-01-10 06:49:18,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 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 06:49:18,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2264 transitions. [2022-01-10 06:49:18,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 06:49:18,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:18,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:18,145 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 06:49:18,336 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 06:49:18,337 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:18,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:18,338 INFO L85 PathProgramCache]: Analyzing trace with hash -283567685, now seen corresponding path program 1 times [2022-01-10 06:49:18,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:18,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611250335] [2022-01-10 06:49:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:18,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:18,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:18,339 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 06:49:18,342 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 06:49:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:18,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:49:18,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:18,453 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 06:49:18,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:18,453 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:18,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611250335] [2022-01-10 06:49:18,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611250335] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:18,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:18,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:49:18,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456290109] [2022-01-10 06:49:18,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:18,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:49:18,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:18,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:49:18,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:49:18,455 INFO L87 Difference]: Start difference. First operand 1585 states and 2264 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:18,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:18,532 INFO L93 Difference]: Finished difference Result 3787 states and 5424 transitions. [2022-01-10 06:49:18,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:49:18,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2022-01-10 06:49:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:18,540 INFO L225 Difference]: With dead ends: 3787 [2022-01-10 06:49:18,540 INFO L226 Difference]: Without dead ends: 2225 [2022-01-10 06:49:18,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 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 06:49:18,544 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 53 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:18,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 187 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2022-01-10 06:49:18,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2203. [2022-01-10 06:49:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 1.4178019981834695) internal successors, (3122), 2202 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 3122 transitions. [2022-01-10 06:49:18,649 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 3122 transitions. Word has length 47 [2022-01-10 06:49:18,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:18,650 INFO L470 AbstractCegarLoop]: Abstraction has 2203 states and 3122 transitions. [2022-01-10 06:49:18,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:18,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 3122 transitions. [2022-01-10 06:49:18,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:49:18,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:18,653 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] [2022-01-10 06:49:18,666 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 06:49:18,862 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 06:49:18,864 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:18,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:18,865 INFO L85 PathProgramCache]: Analyzing trace with hash 613343109, now seen corresponding path program 1 times [2022-01-10 06:49:18,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:18,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197305627] [2022-01-10 06:49:18,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:18,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:18,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:18,866 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 06:49:18,867 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 06:49:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:18,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:49:18,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:49:19,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:49:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:49:19,899 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:19,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197305627] [2022-01-10 06:49:19,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197305627] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:49:19,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:49:19,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:49:19,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666661212] [2022-01-10 06:49:19,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:49:19,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:49:19,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:19,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:49:19,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:49:19,902 INFO L87 Difference]: Start difference. First operand 2203 states and 3122 transitions. Second operand has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:20,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:20,159 INFO L93 Difference]: Finished difference Result 4840 states and 6854 transitions. [2022-01-10 06:49:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:49:20,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 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 06:49:20,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:20,167 INFO L225 Difference]: With dead ends: 4840 [2022-01-10 06:49:20,167 INFO L226 Difference]: Without dead ends: 2766 [2022-01-10 06:49:20,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:49:20,172 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 290 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 376 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:20,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 1579 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 210 Invalid, 0 Unknown, 376 Unchecked, 0.1s Time] [2022-01-10 06:49:20,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2022-01-10 06:49:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2295. [2022-01-10 06:49:20,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2294 states have (on average 1.4136878814298168) internal successors, (3243), 2294 states have internal predecessors, (3243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:20,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 3243 transitions. [2022-01-10 06:49:20,244 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 3243 transitions. Word has length 68 [2022-01-10 06:49:20,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:20,245 INFO L470 AbstractCegarLoop]: Abstraction has 2295 states and 3243 transitions. [2022-01-10 06:49:20,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:20,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 3243 transitions. [2022-01-10 06:49:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:49:20,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:20,246 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] [2022-01-10 06:49:20,253 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 06:49:20,453 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 06:49:20,453 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:20,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:20,453 INFO L85 PathProgramCache]: Analyzing trace with hash 717525894, now seen corresponding path program 1 times [2022-01-10 06:49:20,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:20,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074679033] [2022-01-10 06:49:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:20,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:20,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:20,455 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 06:49:20,457 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 06:49:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:20,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:49:20,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:20,579 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 06:49:20,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:20,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:20,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074679033] [2022-01-10 06:49:20,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074679033] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:20,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:20,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:49:20,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70291794] [2022-01-10 06:49:20,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:20,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:49:20,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:20,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:49:20,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:49:20,580 INFO L87 Difference]: Start difference. First operand 2295 states and 3243 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:20,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:20,654 INFO L93 Difference]: Finished difference Result 3932 states and 5577 transitions. [2022-01-10 06:49:20,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:49:20,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 06:49:20,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:20,659 INFO L225 Difference]: With dead ends: 3932 [2022-01-10 06:49:20,659 INFO L226 Difference]: Without dead ends: 1737 [2022-01-10 06:49:20,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 66 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 06:49:20,662 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 54 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 224 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 06:49:20,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 224 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:20,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2022-01-10 06:49:20,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1735. [2022-01-10 06:49:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1734 states have (on average 1.397347174163783) internal successors, (2423), 1734 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 2423 transitions. [2022-01-10 06:49:20,719 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 2423 transitions. Word has length 68 [2022-01-10 06:49:20,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:20,719 INFO L470 AbstractCegarLoop]: Abstraction has 1735 states and 2423 transitions. [2022-01-10 06:49:20,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:20,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 2423 transitions. [2022-01-10 06:49:20,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:49:20,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:20,720 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] [2022-01-10 06:49:20,731 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 06:49:20,926 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 06:49:20,927 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:20,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:20,927 INFO L85 PathProgramCache]: Analyzing trace with hash 861489603, now seen corresponding path program 1 times [2022-01-10 06:49:20,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:20,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750536043] [2022-01-10 06:49:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:20,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:20,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:20,929 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 06:49:20,930 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 06:49:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:20,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:49:20,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 06:49:21,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:21,204 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:21,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750536043] [2022-01-10 06:49:21,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750536043] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:21,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:21,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:49:21,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375752512] [2022-01-10 06:49:21,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:21,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:49:21,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:21,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:49:21,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:49:21,206 INFO L87 Difference]: Start difference. First operand 1735 states and 2423 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 06:49:21,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:21,293 INFO L93 Difference]: Finished difference Result 3343 states and 4692 transitions. [2022-01-10 06:49:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:49:21,293 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 68 [2022-01-10 06:49:21,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:21,299 INFO L225 Difference]: With dead ends: 3343 [2022-01-10 06:49:21,299 INFO L226 Difference]: Without dead ends: 1722 [2022-01-10 06:49:21,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 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 06:49:21,301 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 23 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:21,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 236 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2022-01-10 06:49:21,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2022-01-10 06:49:21,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1722. [2022-01-10 06:49:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 1.3968622893666474) internal successors, (2404), 1721 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 2404 transitions. [2022-01-10 06:49:21,357 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 2404 transitions. Word has length 68 [2022-01-10 06:49:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:21,358 INFO L470 AbstractCegarLoop]: Abstraction has 1722 states and 2404 transitions. [2022-01-10 06:49:21,358 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 06:49:21,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 2404 transitions. [2022-01-10 06:49:21,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:49:21,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:21,359 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] [2022-01-10 06:49:21,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 06:49:21,565 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 06:49:21,565 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:21,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:21,566 INFO L85 PathProgramCache]: Analyzing trace with hash -159649851, now seen corresponding path program 1 times [2022-01-10 06:49:21,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:21,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385303278] [2022-01-10 06:49:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:21,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:21,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:21,568 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 06:49:21,570 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 06:49:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:21,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:49:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:49:22,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:49:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:49:22,369 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385303278] [2022-01-10 06:49:22,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385303278] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:49:22,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:49:22,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:49:22,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97884503] [2022-01-10 06:49:22,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:49:22,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:49:22,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:22,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:49:22,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:49:22,370 INFO L87 Difference]: Start difference. First operand 1722 states and 2404 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 06:49:22,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:22,611 INFO L93 Difference]: Finished difference Result 3763 states and 5249 transitions. [2022-01-10 06:49:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:49:22,612 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 68 [2022-01-10 06:49:22,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:22,621 INFO L225 Difference]: With dead ends: 3763 [2022-01-10 06:49:22,622 INFO L226 Difference]: Without dead ends: 3209 [2022-01-10 06:49:22,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:49:22,624 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 161 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:22,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 1527 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 217 Invalid, 0 Unknown, 260 Unchecked, 0.1s Time] [2022-01-10 06:49:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2022-01-10 06:49:22,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2786. [2022-01-10 06:49:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2786 states, 2785 states have (on average 1.392100538599641) internal successors, (3877), 2785 states have internal predecessors, (3877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 3877 transitions. [2022-01-10 06:49:22,716 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 3877 transitions. Word has length 68 [2022-01-10 06:49:22,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:22,716 INFO L470 AbstractCegarLoop]: Abstraction has 2786 states and 3877 transitions. [2022-01-10 06:49:22,716 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 06:49:22,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 3877 transitions. [2022-01-10 06:49:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:49:22,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:22,721 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] [2022-01-10 06:49:22,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:49:22,938 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 06:49:22,939 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:22,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:22,939 INFO L85 PathProgramCache]: Analyzing trace with hash 115109763, now seen corresponding path program 1 times [2022-01-10 06:49:22,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:22,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958593741] [2022-01-10 06:49:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:22,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:22,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:22,946 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 06:49:22,948 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 06:49:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:22,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:49:22,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:49:23,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:23,205 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:23,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958593741] [2022-01-10 06:49:23,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958593741] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:23,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:23,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:49:23,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672644298] [2022-01-10 06:49:23,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:23,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:49:23,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:23,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:49:23,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:49:23,206 INFO L87 Difference]: Start difference. First operand 2786 states and 3877 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) 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 06:49:23,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:23,281 INFO L93 Difference]: Finished difference Result 3354 states and 4678 transitions. [2022-01-10 06:49:23,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:49:23,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) 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 68 [2022-01-10 06:49:23,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:23,288 INFO L225 Difference]: With dead ends: 3354 [2022-01-10 06:49:23,288 INFO L226 Difference]: Without dead ends: 2788 [2022-01-10 06:49:23,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 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 06:49:23,290 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 30 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:23,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 255 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2022-01-10 06:49:23,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2788 states. [2022-01-10 06:49:23,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2788 to 2786. [2022-01-10 06:49:23,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2786 states, 2785 states have (on average 1.3917414721723518) internal successors, (3876), 2785 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 3876 transitions. [2022-01-10 06:49:23,382 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 3876 transitions. Word has length 68 [2022-01-10 06:49:23,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:23,382 INFO L470 AbstractCegarLoop]: Abstraction has 2786 states and 3876 transitions. [2022-01-10 06:49:23,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) 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 06:49:23,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 3876 transitions. [2022-01-10 06:49:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:49:23,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:23,384 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] [2022-01-10 06:49:23,399 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 06:49:23,590 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 06:49:23,591 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:23,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:23,591 INFO L85 PathProgramCache]: Analyzing trace with hash -950699987, now seen corresponding path program 1 times [2022-01-10 06:49:23,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:23,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695209247] [2022-01-10 06:49:23,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:23,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:23,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:23,593 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 06:49:23,593 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 06:49:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:23,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:49:23,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 06:49:23,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:23,819 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:23,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695209247] [2022-01-10 06:49:23,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695209247] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:23,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:23,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:49:23,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480641085] [2022-01-10 06:49:23,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:23,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:49:23,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:23,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:49:23,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:49:23,820 INFO L87 Difference]: Start difference. First operand 2786 states and 3876 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 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 06:49:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:23,909 INFO L93 Difference]: Finished difference Result 4413 states and 6159 transitions. [2022-01-10 06:49:23,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:49:23,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 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 68 [2022-01-10 06:49:23,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:23,916 INFO L225 Difference]: With dead ends: 4413 [2022-01-10 06:49:23,917 INFO L226 Difference]: Without dead ends: 2787 [2022-01-10 06:49:23,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 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 06:49:23,919 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 31 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:23,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 245 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-01-10 06:49:23,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2022-01-10 06:49:24,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2787. [2022-01-10 06:49:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 1.3916008614501076) internal successors, (3877), 2786 states have internal predecessors, (3877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:24,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 3877 transitions. [2022-01-10 06:49:24,025 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 3877 transitions. Word has length 68 [2022-01-10 06:49:24,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:24,025 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 3877 transitions. [2022-01-10 06:49:24,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 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 06:49:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 3877 transitions. [2022-01-10 06:49:24,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:49:24,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:24,027 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] [2022-01-10 06:49:24,041 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 06:49:24,233 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 06:49:24,234 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:24,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:24,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1610231509, now seen corresponding path program 1 times [2022-01-10 06:49:24,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:24,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105552595] [2022-01-10 06:49:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:24,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:24,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:24,236 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 06:49:24,237 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 06:49:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:24,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:49:24,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:49:24,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:49:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:49:25,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:25,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105552595] [2022-01-10 06:49:25,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105552595] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:49:25,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:49:25,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:49:25,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463191844] [2022-01-10 06:49:25,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:49:25,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:49:25,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:25,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:49:25,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:49:25,202 INFO L87 Difference]: Start difference. First operand 2787 states and 3877 transitions. Second operand has 16 states, 16 states have (on average 7.9375) internal successors, (127), 15 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:25,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:25,447 INFO L93 Difference]: Finished difference Result 5576 states and 7810 transitions. [2022-01-10 06:49:25,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:49:25,449 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.9375) internal successors, (127), 15 states have internal predecessors, (127), 0 states have call successors, (0), 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 06:49:25,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:25,463 INFO L225 Difference]: With dead ends: 5576 [2022-01-10 06:49:25,463 INFO L226 Difference]: Without dead ends: 3994 [2022-01-10 06:49:25,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:49:25,466 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 169 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:25,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 1847 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 173 Invalid, 0 Unknown, 206 Unchecked, 0.1s Time] [2022-01-10 06:49:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3994 states. [2022-01-10 06:49:25,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3994 to 3526. [2022-01-10 06:49:25,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 1.3931914893617021) internal successors, (4911), 3525 states have internal predecessors, (4911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:25,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 4911 transitions. [2022-01-10 06:49:25,587 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 4911 transitions. Word has length 68 [2022-01-10 06:49:25,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:25,587 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 4911 transitions. [2022-01-10 06:49:25,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.9375) internal successors, (127), 15 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:25,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 4911 transitions. [2022-01-10 06:49:25,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:49:25,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:25,590 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 06:49:25,598 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 06:49:25,808 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 06:49:25,808 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:25,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:25,809 INFO L85 PathProgramCache]: Analyzing trace with hash -2105051018, now seen corresponding path program 1 times [2022-01-10 06:49:25,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:25,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286065041] [2022-01-10 06:49:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:25,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:25,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:25,810 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 06:49:25,811 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 06:49:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:25,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:49:25,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:49:26,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:49:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:49:26,113 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:26,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286065041] [2022-01-10 06:49:26,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286065041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:49:26,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:49:26,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-01-10 06:49:26,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928839727] [2022-01-10 06:49:26,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:49:26,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:49:26,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:26,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:49:26,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:49:26,122 INFO L87 Difference]: Start difference. First operand 3526 states and 4911 transitions. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:26,347 INFO L93 Difference]: Finished difference Result 9317 states and 12880 transitions. [2022-01-10 06:49:26,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:49:26,347 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 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 06:49:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:26,358 INFO L225 Difference]: With dead ends: 9317 [2022-01-10 06:49:26,358 INFO L226 Difference]: Without dead ends: 6063 [2022-01-10 06:49:26,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:49:26,363 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 752 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:26,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 267 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:49:26,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2022-01-10 06:49:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 3819. [2022-01-10 06:49:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3819 states, 3818 states have (on average 1.3643268727082243) internal successors, (5209), 3818 states have internal predecessors, (5209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3819 states to 3819 states and 5209 transitions. [2022-01-10 06:49:26,534 INFO L78 Accepts]: Start accepts. Automaton has 3819 states and 5209 transitions. Word has length 69 [2022-01-10 06:49:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:26,534 INFO L470 AbstractCegarLoop]: Abstraction has 3819 states and 5209 transitions. [2022-01-10 06:49:26,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3819 states and 5209 transitions. [2022-01-10 06:49:26,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:49:26,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:26,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:26,545 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 06:49:26,743 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 06:49:26,743 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:26,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:26,743 INFO L85 PathProgramCache]: Analyzing trace with hash 273068524, now seen corresponding path program 1 times [2022-01-10 06:49:26,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:26,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013690125] [2022-01-10 06:49:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:26,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:26,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:26,745 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 06:49:26,745 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 06:49:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:26,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:49:26,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:49:26,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:26,849 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:26,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013690125] [2022-01-10 06:49:26,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013690125] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:26,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:26,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:49:26,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50484725] [2022-01-10 06:49:26,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:26,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:49:26,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:26,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:49:26,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:49:26,850 INFO L87 Difference]: Start difference. First operand 3819 states and 5209 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:26,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:26,907 INFO L93 Difference]: Finished difference Result 5569 states and 7625 transitions. [2022-01-10 06:49:26,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:49:26,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-10 06:49:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:26,910 INFO L225 Difference]: With dead ends: 5569 [2022-01-10 06:49:26,910 INFO L226 Difference]: Without dead ends: 2033 [2022-01-10 06:49:26,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 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 06:49:26,914 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 41 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 205 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 06:49:26,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 205 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:26,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2022-01-10 06:49:26,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 2031. [2022-01-10 06:49:26,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 1.3295566502463054) internal successors, (2699), 2030 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2699 transitions. [2022-01-10 06:49:26,979 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2699 transitions. Word has length 69 [2022-01-10 06:49:26,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:26,980 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 2699 transitions. [2022-01-10 06:49:26,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:26,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2699 transitions. [2022-01-10 06:49:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:49:26,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:26,981 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 06:49:26,999 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 06:49:27,199 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 06:49:27,200 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:27,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:27,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1850114566, now seen corresponding path program 1 times [2022-01-10 06:49:27,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:27,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906681116] [2022-01-10 06:49:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:27,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:27,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:27,202 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 06:49:27,211 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 06:49:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:27,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:49:27,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:49:27,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:49:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:49:27,502 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:27,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906681116] [2022-01-10 06:49:27,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906681116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:49:27,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:49:27,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:49:27,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700402109] [2022-01-10 06:49:27,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:49:27,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:49:27,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:27,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:49:27,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:49:27,504 INFO L87 Difference]: Start difference. First operand 2031 states and 2699 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:27,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:27,645 INFO L93 Difference]: Finished difference Result 7363 states and 9967 transitions. [2022-01-10 06:49:27,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:49:27,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 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 06:49:27,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:27,655 INFO L225 Difference]: With dead ends: 7363 [2022-01-10 06:49:27,656 INFO L226 Difference]: Without dead ends: 5615 [2022-01-10 06:49:27,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:49:27,660 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 294 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:27,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 578 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2022-01-10 06:49:27,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5615 states. [2022-01-10 06:49:27,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5615 to 5456. [2022-01-10 06:49:27,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5456 states, 5455 states have (on average 1.3296058661778185) internal successors, (7253), 5455 states have internal predecessors, (7253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5456 states to 5456 states and 7253 transitions. [2022-01-10 06:49:27,838 INFO L78 Accepts]: Start accepts. Automaton has 5456 states and 7253 transitions. Word has length 69 [2022-01-10 06:49:27,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:27,838 INFO L470 AbstractCegarLoop]: Abstraction has 5456 states and 7253 transitions. [2022-01-10 06:49:27,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 5456 states and 7253 transitions. [2022-01-10 06:49:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:49:27,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:27,840 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 06:49:27,849 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 06:49:28,049 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 06:49:28,049 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:28,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:28,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1646584680, now seen corresponding path program 1 times [2022-01-10 06:49:28,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:28,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071393502] [2022-01-10 06:49:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:28,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:28,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:28,051 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 06:49:28,055 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 06:49:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:28,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:49:28,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:49:28,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:28,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:28,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071393502] [2022-01-10 06:49:28,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071393502] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:28,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:28,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:49:28,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862100673] [2022-01-10 06:49:28,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:28,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:49:28,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:49:28,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:49:28,203 INFO L87 Difference]: Start difference. First operand 5456 states and 7253 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:28,387 INFO L93 Difference]: Finished difference Result 9402 states and 12555 transitions. [2022-01-10 06:49:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:49:28,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-10 06:49:28,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:28,398 INFO L225 Difference]: With dead ends: 9402 [2022-01-10 06:49:28,398 INFO L226 Difference]: Without dead ends: 6393 [2022-01-10 06:49:28,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 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 06:49:28,404 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 52 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:28,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 227 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:28,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6393 states. [2022-01-10 06:49:28,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6393 to 5451. [2022-01-10 06:49:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5451 states, 5450 states have (on average 1.315045871559633) internal successors, (7167), 5450 states have internal predecessors, (7167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:28,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5451 states to 5451 states and 7167 transitions. [2022-01-10 06:49:28,615 INFO L78 Accepts]: Start accepts. Automaton has 5451 states and 7167 transitions. Word has length 69 [2022-01-10 06:49:28,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:28,616 INFO L470 AbstractCegarLoop]: Abstraction has 5451 states and 7167 transitions. [2022-01-10 06:49:28,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:28,616 INFO L276 IsEmpty]: Start isEmpty. Operand 5451 states and 7167 transitions. [2022-01-10 06:49:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:49:28,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:28,617 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 06:49:28,626 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 06:49:28,824 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 06:49:28,824 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:28,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:28,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1640895432, now seen corresponding path program 1 times [2022-01-10 06:49:28,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:28,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795553295] [2022-01-10 06:49:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:28,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:28,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:28,826 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 06:49:28,827 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 06:49:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:28,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:49:28,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:49:28,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:28,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:28,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795553295] [2022-01-10 06:49:28,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [795553295] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:28,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:28,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:49:28,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765478550] [2022-01-10 06:49:28,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:28,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:49:28,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:28,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:49:28,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:49:28,951 INFO L87 Difference]: Start difference. First operand 5451 states and 7167 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:29,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:29,177 INFO L93 Difference]: Finished difference Result 11795 states and 15512 transitions. [2022-01-10 06:49:29,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:49:29,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-10 06:49:29,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:29,196 INFO L225 Difference]: With dead ends: 11795 [2022-01-10 06:49:29,196 INFO L226 Difference]: Without dead ends: 8422 [2022-01-10 06:49:29,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 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 06:49:29,202 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 50 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:29,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 231 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:29,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8422 states. [2022-01-10 06:49:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8422 to 8420. [2022-01-10 06:49:29,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8420 states, 8419 states have (on average 1.2969473809241003) internal successors, (10919), 8419 states have internal predecessors, (10919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8420 states to 8420 states and 10919 transitions. [2022-01-10 06:49:29,506 INFO L78 Accepts]: Start accepts. Automaton has 8420 states and 10919 transitions. Word has length 69 [2022-01-10 06:49:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:29,506 INFO L470 AbstractCegarLoop]: Abstraction has 8420 states and 10919 transitions. [2022-01-10 06:49:29,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:29,506 INFO L276 IsEmpty]: Start isEmpty. Operand 8420 states and 10919 transitions. [2022-01-10 06:49:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:49:29,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:29,508 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 06:49:29,519 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 06:49:29,719 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 06:49:29,720 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:29,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:29,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1857921102, now seen corresponding path program 1 times [2022-01-10 06:49:29,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:29,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827118802] [2022-01-10 06:49:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:29,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:29,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:29,722 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 06:49:29,722 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 06:49:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:29,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:49:29,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:29,920 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 06:49:29,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:49:30,015 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 06:49:30,015 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:30,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827118802] [2022-01-10 06:49:30,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827118802] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:49:30,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:49:30,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-01-10 06:49:30,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689726425] [2022-01-10 06:49:30,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:49:30,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:49:30,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:30,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:49:30,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:49:30,017 INFO L87 Difference]: Start difference. First operand 8420 states and 10919 transitions. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 06:49:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:30,573 INFO L93 Difference]: Finished difference Result 16389 states and 21084 transitions. [2022-01-10 06:49:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:49:30,574 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 69 [2022-01-10 06:49:30,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:30,590 INFO L225 Difference]: With dead ends: 16389 [2022-01-10 06:49:30,590 INFO L226 Difference]: Without dead ends: 13317 [2022-01-10 06:49:30,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:49:30,595 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 493 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:30,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 399 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:49:30,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13317 states. [2022-01-10 06:49:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13317 to 9948. [2022-01-10 06:49:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9948 states, 9947 states have (on average 1.2886297376093294) internal successors, (12818), 9947 states have internal predecessors, (12818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:30,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9948 states to 9948 states and 12818 transitions. [2022-01-10 06:49:30,977 INFO L78 Accepts]: Start accepts. Automaton has 9948 states and 12818 transitions. Word has length 69 [2022-01-10 06:49:30,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:30,977 INFO L470 AbstractCegarLoop]: Abstraction has 9948 states and 12818 transitions. [2022-01-10 06:49:30,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 06:49:30,977 INFO L276 IsEmpty]: Start isEmpty. Operand 9948 states and 12818 transitions. [2022-01-10 06:49:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:49:30,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:30,979 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 06:49:30,999 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 06:49:31,185 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 06:49:31,185 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:31,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:31,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1430575038, now seen corresponding path program 1 times [2022-01-10 06:49:31,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:31,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783239569] [2022-01-10 06:49:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:31,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:31,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:31,187 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 06:49:31,189 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 06:49:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:31,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:49:31,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:49:31,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:31,303 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:31,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783239569] [2022-01-10 06:49:31,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783239569] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:31,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:31,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:49:31,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993852035] [2022-01-10 06:49:31,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:31,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:49:31,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:31,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:49:31,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:49:31,305 INFO L87 Difference]: Start difference. First operand 9948 states and 12818 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:31,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:31,630 INFO L93 Difference]: Finished difference Result 15000 states and 19227 transitions. [2022-01-10 06:49:31,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:49:31,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-10 06:49:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:31,641 INFO L225 Difference]: With dead ends: 15000 [2022-01-10 06:49:31,642 INFO L226 Difference]: Without dead ends: 9540 [2022-01-10 06:49:31,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 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 06:49:31,648 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 53 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:31,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 240 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:31,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9540 states. [2022-01-10 06:49:31,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9540 to 7080. [2022-01-10 06:49:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7080 states, 7079 states have (on average 1.2678344398926402) internal successors, (8975), 7079 states have internal predecessors, (8975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7080 states to 7080 states and 8975 transitions. [2022-01-10 06:49:32,006 INFO L78 Accepts]: Start accepts. Automaton has 7080 states and 8975 transitions. Word has length 69 [2022-01-10 06:49:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:32,007 INFO L470 AbstractCegarLoop]: Abstraction has 7080 states and 8975 transitions. [2022-01-10 06:49:32,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 7080 states and 8975 transitions. [2022-01-10 06:49:32,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 06:49:32,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:32,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:32,018 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 06:49:32,214 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 06:49:32,215 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:32,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:32,215 INFO L85 PathProgramCache]: Analyzing trace with hash 328980510, now seen corresponding path program 1 times [2022-01-10 06:49:32,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:32,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250079842] [2022-01-10 06:49:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:32,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:32,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:32,217 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 06:49:32,218 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 06:49:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:32,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:49:32,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:32,974 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 06:49:32,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:49:33,200 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 06:49:33,200 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:33,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250079842] [2022-01-10 06:49:33,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250079842] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:49:33,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:49:33,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:49:33,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192974939] [2022-01-10 06:49:33,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:49:33,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:49:33,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:33,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:49:33,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:49:33,202 INFO L87 Difference]: Start difference. First operand 7080 states and 8975 transitions. Second operand has 16 states, 16 states have (on average 8.0625) internal successors, (129), 15 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:33,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:33,648 INFO L93 Difference]: Finished difference Result 10324 states and 13103 transitions. [2022-01-10 06:49:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:49:33,649 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.0625) internal successors, (129), 15 states have internal predecessors, (129), 0 states have call successors, (0), 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 06:49:33,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:33,658 INFO L225 Difference]: With dead ends: 10324 [2022-01-10 06:49:33,658 INFO L226 Difference]: Without dead ends: 8519 [2022-01-10 06:49:33,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:49:33,661 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 193 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:33,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 1189 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 256 Invalid, 0 Unknown, 180 Unchecked, 0.1s Time] [2022-01-10 06:49:33,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8519 states. [2022-01-10 06:49:33,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8519 to 7110. [2022-01-10 06:49:33,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7110 states, 7109 states have (on average 1.2675481783654523) internal successors, (9011), 7109 states have internal predecessors, (9011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7110 states to 7110 states and 9011 transitions. [2022-01-10 06:49:33,954 INFO L78 Accepts]: Start accepts. Automaton has 7110 states and 9011 transitions. Word has length 70 [2022-01-10 06:49:33,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:33,954 INFO L470 AbstractCegarLoop]: Abstraction has 7110 states and 9011 transitions. [2022-01-10 06:49:33,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.0625) internal successors, (129), 15 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:33,955 INFO L276 IsEmpty]: Start isEmpty. Operand 7110 states and 9011 transitions. [2022-01-10 06:49:33,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 06:49:33,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:33,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:33,962 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 06:49:34,162 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 06:49:34,162 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:34,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:34,163 INFO L85 PathProgramCache]: Analyzing trace with hash 256593952, now seen corresponding path program 1 times [2022-01-10 06:49:34,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:34,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628682078] [2022-01-10 06:49:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:34,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:34,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:34,164 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 06:49:34,165 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 06:49:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:34,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:49:34,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:34,431 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 06:49:34,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:34,432 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:34,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628682078] [2022-01-10 06:49:34,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628682078] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:34,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:34,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:49:34,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882459713] [2022-01-10 06:49:34,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:34,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:49:34,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:34,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:49:34,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:49:34,433 INFO L87 Difference]: Start difference. First operand 7110 states and 9011 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:34,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:34,671 INFO L93 Difference]: Finished difference Result 8952 states and 11352 transitions. [2022-01-10 06:49:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:49:34,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 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 06:49:34,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:34,678 INFO L225 Difference]: With dead ends: 8952 [2022-01-10 06:49:34,678 INFO L226 Difference]: Without dead ends: 7111 [2022-01-10 06:49:34,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 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 06:49:34,681 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 31 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:34,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 289 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2022-01-10 06:49:34,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7111 states. [2022-01-10 06:49:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7111 to 7110. [2022-01-10 06:49:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7110 states, 7109 states have (on average 1.2674075116050076) internal successors, (9010), 7109 states have internal predecessors, (9010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7110 states to 7110 states and 9010 transitions. [2022-01-10 06:49:34,965 INFO L78 Accepts]: Start accepts. Automaton has 7110 states and 9010 transitions. Word has length 70 [2022-01-10 06:49:34,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:34,965 INFO L470 AbstractCegarLoop]: Abstraction has 7110 states and 9010 transitions. [2022-01-10 06:49:34,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:34,966 INFO L276 IsEmpty]: Start isEmpty. Operand 7110 states and 9010 transitions. [2022-01-10 06:49:34,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 06:49:34,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:34,967 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:34,973 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 06:49:35,167 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 06:49:35,168 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:35,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:35,168 INFO L85 PathProgramCache]: Analyzing trace with hash 95771974, now seen corresponding path program 1 times [2022-01-10 06:49:35,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:35,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138420410] [2022-01-10 06:49:35,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:35,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:35,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:35,169 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 06:49:35,170 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 06:49:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:35,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:49:35,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:35,444 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 06:49:35,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:35,445 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:35,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138420410] [2022-01-10 06:49:35,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138420410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:35,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:35,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:49:35,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183257357] [2022-01-10 06:49:35,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:35,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:49:35,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:35,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:49:35,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:49:35,446 INFO L87 Difference]: Start difference. First operand 7110 states and 9010 transitions. Second operand has 6 states, 6 states have (on average 11.0) 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 06:49:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:35,672 INFO L93 Difference]: Finished difference Result 12958 states and 16474 transitions. [2022-01-10 06:49:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:49:35,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) 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 70 [2022-01-10 06:49:35,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:35,680 INFO L225 Difference]: With dead ends: 12958 [2022-01-10 06:49:35,680 INFO L226 Difference]: Without dead ends: 7110 [2022-01-10 06:49:35,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 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 06:49:35,686 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 23 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:35,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 353 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 60 Unchecked, 0.0s Time] [2022-01-10 06:49:35,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7110 states. [2022-01-10 06:49:36,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7110 to 7110. [2022-01-10 06:49:36,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7110 states, 7109 states have (on average 1.2672668448445632) internal successors, (9009), 7109 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7110 states to 7110 states and 9009 transitions. [2022-01-10 06:49:36,032 INFO L78 Accepts]: Start accepts. Automaton has 7110 states and 9009 transitions. Word has length 70 [2022-01-10 06:49:36,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:36,032 INFO L470 AbstractCegarLoop]: Abstraction has 7110 states and 9009 transitions. [2022-01-10 06:49:36,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) 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 06:49:36,033 INFO L276 IsEmpty]: Start isEmpty. Operand 7110 states and 9009 transitions. [2022-01-10 06:49:36,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 06:49:36,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:36,034 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:36,043 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 06:49:36,241 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 06:49:36,241 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:36,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:36,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1125131272, now seen corresponding path program 1 times [2022-01-10 06:49:36,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:36,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76757513] [2022-01-10 06:49:36,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:36,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:36,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:36,243 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 06:49:36,244 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 06:49:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:36,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:49:36,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:36,922 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 06:49:36,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:49:37,207 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 06:49:37,207 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:37,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76757513] [2022-01-10 06:49:37,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76757513] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:49:37,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:49:37,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:49:37,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009601192] [2022-01-10 06:49:37,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:49:37,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:49:37,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:37,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:49:37,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:49:37,209 INFO L87 Difference]: Start difference. First operand 7110 states and 9009 transitions. Second operand has 16 states, 16 states have (on average 8.3125) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:37,816 INFO L93 Difference]: Finished difference Result 15274 states and 19149 transitions. [2022-01-10 06:49:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:49:37,816 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.3125) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 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 06:49:37,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:37,826 INFO L225 Difference]: With dead ends: 15274 [2022-01-10 06:49:37,826 INFO L226 Difference]: Without dead ends: 10672 [2022-01-10 06:49:37,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:49:37,830 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 283 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 376 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:37,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 1554 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 260 Invalid, 0 Unknown, 376 Unchecked, 0.1s Time] [2022-01-10 06:49:37,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10672 states. [2022-01-10 06:49:38,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10672 to 7199. [2022-01-10 06:49:38,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7199 states, 7198 states have (on average 1.2678521811614338) internal successors, (9126), 7198 states have internal predecessors, (9126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:38,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7199 states to 7199 states and 9126 transitions. [2022-01-10 06:49:38,112 INFO L78 Accepts]: Start accepts. Automaton has 7199 states and 9126 transitions. Word has length 70 [2022-01-10 06:49:38,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:38,112 INFO L470 AbstractCegarLoop]: Abstraction has 7199 states and 9126 transitions. [2022-01-10 06:49:38,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.3125) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:38,112 INFO L276 IsEmpty]: Start isEmpty. Operand 7199 states and 9126 transitions. [2022-01-10 06:49:38,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 06:49:38,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:38,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:38,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 06:49:38,318 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 06:49:38,318 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:38,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:38,318 INFO L85 PathProgramCache]: Analyzing trace with hash 592997015, now seen corresponding path program 1 times [2022-01-10 06:49:38,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:38,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134822427] [2022-01-10 06:49:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:38,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:38,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:38,320 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 06:49:38,321 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 06:49:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:38,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:49:38,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:38,527 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 06:49:38,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:49:38,619 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 06:49:38,619 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:38,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134822427] [2022-01-10 06:49:38,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134822427] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:49:38,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:49:38,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-01-10 06:49:38,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747616622] [2022-01-10 06:49:38,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:49:38,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:49:38,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:38,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:49:38,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:49:38,620 INFO L87 Difference]: Start difference. First operand 7199 states and 9126 transitions. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:39,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:39,092 INFO L93 Difference]: Finished difference Result 15008 states and 18836 transitions. [2022-01-10 06:49:39,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:49:39,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 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 06:49:39,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:39,103 INFO L225 Difference]: With dead ends: 15008 [2022-01-10 06:49:39,104 INFO L226 Difference]: Without dead ends: 10113 [2022-01-10 06:49:39,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:49:39,110 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 470 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:39,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 386 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:49:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10113 states. [2022-01-10 06:49:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10113 to 8068. [2022-01-10 06:49:39,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8068 states, 8067 states have (on average 1.2500309904549398) internal successors, (10084), 8067 states have internal predecessors, (10084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8068 states to 8068 states and 10084 transitions. [2022-01-10 06:49:39,458 INFO L78 Accepts]: Start accepts. Automaton has 8068 states and 10084 transitions. Word has length 70 [2022-01-10 06:49:39,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:39,458 INFO L470 AbstractCegarLoop]: Abstraction has 8068 states and 10084 transitions. [2022-01-10 06:49:39,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:39,458 INFO L276 IsEmpty]: Start isEmpty. Operand 8068 states and 10084 transitions. [2022-01-10 06:49:39,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 06:49:39,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:39,460 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:39,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-01-10 06:49:39,662 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 06:49:39,662 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:39,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:39,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1314373988, now seen corresponding path program 1 times [2022-01-10 06:49:39,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:39,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006747942] [2022-01-10 06:49:39,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:39,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:39,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:39,664 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 06:49:39,665 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 06:49:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:39,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:49:39,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:40,104 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 06:49:40,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:49:40,403 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 06:49:40,403 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:40,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006747942] [2022-01-10 06:49:40,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006747942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:49:40,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:49:40,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:49:40,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305436578] [2022-01-10 06:49:40,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:49:40,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:49:40,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:40,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:49:40,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:49:40,405 INFO L87 Difference]: Start difference. First operand 8068 states and 10084 transitions. Second operand has 16 states, 16 states have (on average 7.625) internal successors, (122), 15 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:40,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:40,924 INFO L93 Difference]: Finished difference Result 12601 states and 15682 transitions. [2022-01-10 06:49:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:49:40,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.625) internal successors, (122), 15 states have internal predecessors, (122), 0 states have call successors, (0), 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 06:49:40,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:40,937 INFO L225 Difference]: With dead ends: 12601 [2022-01-10 06:49:40,937 INFO L226 Difference]: Without dead ends: 10420 [2022-01-10 06:49:40,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:49:40,941 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 122 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:40,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1173 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 165 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-01-10 06:49:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10420 states. [2022-01-10 06:49:41,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10420 to 8082. [2022-01-10 06:49:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8082 states, 8081 states have (on average 1.2495978220517263) internal successors, (10098), 8081 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:41,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8082 states to 8082 states and 10098 transitions. [2022-01-10 06:49:41,282 INFO L78 Accepts]: Start accepts. Automaton has 8082 states and 10098 transitions. Word has length 70 [2022-01-10 06:49:41,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:41,282 INFO L470 AbstractCegarLoop]: Abstraction has 8082 states and 10098 transitions. [2022-01-10 06:49:41,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.625) internal successors, (122), 15 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:41,282 INFO L276 IsEmpty]: Start isEmpty. Operand 8082 states and 10098 transitions. [2022-01-10 06:49:41,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 06:49:41,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:41,284 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:41,292 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 06:49:41,490 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 06:49:41,491 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:41,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:41,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1241987430, now seen corresponding path program 1 times [2022-01-10 06:49:41,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:41,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297529438] [2022-01-10 06:49:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:41,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:41,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:41,492 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 06:49:41,493 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 06:49:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:41,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:49:41,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:41,797 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 06:49:41,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:41,797 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:41,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297529438] [2022-01-10 06:49:41,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297529438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:41,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:41,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:49:41,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796462542] [2022-01-10 06:49:41,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:41,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:49:41,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:41,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:49:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:49:41,798 INFO L87 Difference]: Start difference. First operand 8082 states and 10098 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:42,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:42,142 INFO L93 Difference]: Finished difference Result 10264 states and 12799 transitions. [2022-01-10 06:49:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:49:42,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 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 06:49:42,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:42,150 INFO L225 Difference]: With dead ends: 10264 [2022-01-10 06:49:42,150 INFO L226 Difference]: Without dead ends: 8068 [2022-01-10 06:49:42,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 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 06:49:42,153 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 31 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:42,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 298 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-01-10 06:49:42,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8068 states. [2022-01-10 06:49:42,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8068 to 8068. [2022-01-10 06:49:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8068 states, 8067 states have (on average 1.2497830668154208) internal successors, (10082), 8067 states have internal predecessors, (10082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8068 states to 8068 states and 10082 transitions. [2022-01-10 06:49:42,478 INFO L78 Accepts]: Start accepts. Automaton has 8068 states and 10082 transitions. Word has length 70 [2022-01-10 06:49:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:42,478 INFO L470 AbstractCegarLoop]: Abstraction has 8068 states and 10082 transitions. [2022-01-10 06:49:42,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 8068 states and 10082 transitions. [2022-01-10 06:49:42,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 06:49:42,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:42,480 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:42,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-01-10 06:49:42,684 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 06:49:42,685 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:42,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:42,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1875918883, now seen corresponding path program 1 times [2022-01-10 06:49:42,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:42,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034711136] [2022-01-10 06:49:42,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:42,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:42,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:42,687 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 06:49:42,687 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 06:49:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:42,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:49:42,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:42,965 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 06:49:42,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:42,965 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:42,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034711136] [2022-01-10 06:49:42,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034711136] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:42,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:42,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:49:42,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691291544] [2022-01-10 06:49:42,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:42,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:49:42,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:42,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:49:42,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:49:42,966 INFO L87 Difference]: Start difference. First operand 8068 states and 10082 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:43,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:43,482 INFO L93 Difference]: Finished difference Result 15526 states and 19607 transitions. [2022-01-10 06:49:43,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:49:43,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-01-10 06:49:43,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:43,495 INFO L225 Difference]: With dead ends: 15526 [2022-01-10 06:49:43,495 INFO L226 Difference]: Without dead ends: 11588 [2022-01-10 06:49:43,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 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 06:49:43,500 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 237 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:43,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 524 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:43,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11588 states. [2022-01-10 06:49:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11588 to 9853. [2022-01-10 06:49:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9853 states, 9852 states have (on average 1.2374137231019082) internal successors, (12191), 9852 states have internal predecessors, (12191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9853 states to 9853 states and 12191 transitions. [2022-01-10 06:49:43,962 INFO L78 Accepts]: Start accepts. Automaton has 9853 states and 12191 transitions. Word has length 71 [2022-01-10 06:49:43,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:43,962 INFO L470 AbstractCegarLoop]: Abstraction has 9853 states and 12191 transitions. [2022-01-10 06:49:43,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:43,962 INFO L276 IsEmpty]: Start isEmpty. Operand 9853 states and 12191 transitions. [2022-01-10 06:49:43,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 06:49:43,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:43,964 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, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:43,970 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 06:49:44,170 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 06:49:44,170 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:44,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1200015552, now seen corresponding path program 1 times [2022-01-10 06:49:44,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:44,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180890784] [2022-01-10 06:49:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:44,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:44,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:44,172 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 06:49:44,173 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 06:49:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:44,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:49:44,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:44,443 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 06:49:44,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:44,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:44,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180890784] [2022-01-10 06:49:44,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180890784] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:44,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:44,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:49:44,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735149787] [2022-01-10 06:49:44,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:44,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:49:44,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:44,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:49:44,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:49:44,445 INFO L87 Difference]: Start difference. First operand 9853 states and 12191 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:44,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:44,807 INFO L93 Difference]: Finished difference Result 15576 states and 19328 transitions. [2022-01-10 06:49:44,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:49:44,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 71 [2022-01-10 06:49:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:44,820 INFO L225 Difference]: With dead ends: 15576 [2022-01-10 06:49:44,820 INFO L226 Difference]: Without dead ends: 9814 [2022-01-10 06:49:44,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 66 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 06:49:44,827 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 36 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:44,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 255 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2022-01-10 06:49:44,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9814 states. [2022-01-10 06:49:45,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9814 to 9814. [2022-01-10 06:49:45,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9814 states, 9813 states have (on average 1.2368286966269235) internal successors, (12137), 9813 states have internal predecessors, (12137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9814 states to 9814 states and 12137 transitions. [2022-01-10 06:49:45,261 INFO L78 Accepts]: Start accepts. Automaton has 9814 states and 12137 transitions. Word has length 71 [2022-01-10 06:49:45,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:45,262 INFO L470 AbstractCegarLoop]: Abstraction has 9814 states and 12137 transitions. [2022-01-10 06:49:45,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 9814 states and 12137 transitions. [2022-01-10 06:49:45,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 06:49:45,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:45,263 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:45,269 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 06:49:45,467 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 06:49:45,467 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:45,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:45,468 INFO L85 PathProgramCache]: Analyzing trace with hash 91355945, now seen corresponding path program 1 times [2022-01-10 06:49:45,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:45,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041978114] [2022-01-10 06:49:45,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:45,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:45,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:45,469 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 06:49:45,470 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 06:49:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:45,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:49:45,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:49:45,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:45,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:45,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041978114] [2022-01-10 06:49:45,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041978114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:45,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:45,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:49:45,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496614639] [2022-01-10 06:49:45,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:45,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:49:45,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:45,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:49:45,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:49:45,585 INFO L87 Difference]: Start difference. First operand 9814 states and 12137 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:45,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:45,813 INFO L93 Difference]: Finished difference Result 14497 states and 17989 transitions. [2022-01-10 06:49:45,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:49:45,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2022-01-10 06:49:45,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:45,823 INFO L225 Difference]: With dead ends: 14497 [2022-01-10 06:49:45,823 INFO L226 Difference]: Without dead ends: 6034 [2022-01-10 06:49:45,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 69 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 06:49:45,829 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 27 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 183 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 06:49:45,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 183 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6034 states. [2022-01-10 06:49:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6034 to 6029. [2022-01-10 06:49:46,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6029 states, 6028 states have (on average 1.225779694757797) internal successors, (7389), 6028 states have internal predecessors, (7389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:46,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6029 states to 6029 states and 7389 transitions. [2022-01-10 06:49:46,061 INFO L78 Accepts]: Start accepts. Automaton has 6029 states and 7389 transitions. Word has length 71 [2022-01-10 06:49:46,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:46,061 INFO L470 AbstractCegarLoop]: Abstraction has 6029 states and 7389 transitions. [2022-01-10 06:49:46,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:46,061 INFO L276 IsEmpty]: Start isEmpty. Operand 6029 states and 7389 transitions. [2022-01-10 06:49:46,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 06:49:46,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:46,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:46,070 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 06:49:46,263 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 06:49:46,264 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:46,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:46,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1825675581, now seen corresponding path program 1 times [2022-01-10 06:49:46,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:46,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922471203] [2022-01-10 06:49:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:46,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:46,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:46,265 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 06:49:46,266 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 06:49:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:46,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:49:46,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:46,577 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 06:49:46,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:46,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:46,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922471203] [2022-01-10 06:49:46,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922471203] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:46,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:46,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:49:46,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107542603] [2022-01-10 06:49:46,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:46,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:49:46,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:46,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:49:46,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:49:46,579 INFO L87 Difference]: Start difference. First operand 6029 states and 7389 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:46,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:46,901 INFO L93 Difference]: Finished difference Result 10337 states and 12870 transitions. [2022-01-10 06:49:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:49:46,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-01-10 06:49:46,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:46,909 INFO L225 Difference]: With dead ends: 10337 [2022-01-10 06:49:46,910 INFO L226 Difference]: Without dead ends: 8387 [2022-01-10 06:49:46,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 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 06:49:46,912 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 288 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:46,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 435 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8387 states. [2022-01-10 06:49:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8387 to 6795. [2022-01-10 06:49:47,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6795 states, 6794 states have (on average 1.2259346482190168) internal successors, (8329), 6794 states have internal predecessors, (8329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:47,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6795 states to 6795 states and 8329 transitions. [2022-01-10 06:49:47,177 INFO L78 Accepts]: Start accepts. Automaton has 6795 states and 8329 transitions. Word has length 71 [2022-01-10 06:49:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:47,177 INFO L470 AbstractCegarLoop]: Abstraction has 6795 states and 8329 transitions. [2022-01-10 06:49:47,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:47,178 INFO L276 IsEmpty]: Start isEmpty. Operand 6795 states and 8329 transitions. [2022-01-10 06:49:47,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 06:49:47,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:47,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:47,187 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 06:49:47,379 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 06:49:47,379 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:47,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:47,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1734716627, now seen corresponding path program 1 times [2022-01-10 06:49:47,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:47,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577242562] [2022-01-10 06:49:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:47,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:47,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:47,381 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 06:49:47,382 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 06:49:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:47,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:49:47,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:47,496 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 06:49:47,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:47,497 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:47,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577242562] [2022-01-10 06:49:47,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577242562] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:47,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:47,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:49:47,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990319715] [2022-01-10 06:49:47,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:47,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:49:47,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:47,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:49:47,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:49:47,498 INFO L87 Difference]: Start difference. First operand 6795 states and 8329 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:47,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:47,882 INFO L93 Difference]: Finished difference Result 12926 states and 15833 transitions. [2022-01-10 06:49:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:49:47,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 71 [2022-01-10 06:49:47,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:47,891 INFO L225 Difference]: With dead ends: 12926 [2022-01-10 06:49:47,891 INFO L226 Difference]: Without dead ends: 10204 [2022-01-10 06:49:47,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 69 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 06:49:47,893 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 71 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:47,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 183 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10204 states. [2022-01-10 06:49:48,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10204 to 8641. [2022-01-10 06:49:48,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8641 states, 8640 states have (on average 1.2268518518518519) internal successors, (10600), 8640 states have internal predecessors, (10600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8641 states to 8641 states and 10600 transitions. [2022-01-10 06:49:48,226 INFO L78 Accepts]: Start accepts. Automaton has 8641 states and 10600 transitions. Word has length 71 [2022-01-10 06:49:48,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:48,227 INFO L470 AbstractCegarLoop]: Abstraction has 8641 states and 10600 transitions. [2022-01-10 06:49:48,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:48,227 INFO L276 IsEmpty]: Start isEmpty. Operand 8641 states and 10600 transitions. [2022-01-10 06:49:48,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 06:49:48,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:48,228 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:48,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-01-10 06:49:48,428 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 06:49:48,429 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:48,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:48,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1642468763, now seen corresponding path program 1 times [2022-01-10 06:49:48,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:48,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018613452] [2022-01-10 06:49:48,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:48,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:48,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:48,431 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 06:49:48,432 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 06:49:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:48,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:49:48,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:48,698 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 06:49:48,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:48,698 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:48,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018613452] [2022-01-10 06:49:48,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018613452] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:48,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:48,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:49:48,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339593759] [2022-01-10 06:49:48,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:48,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:49:48,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:48,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:49:48,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:49:48,699 INFO L87 Difference]: Start difference. First operand 8641 states and 10600 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:49,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:49,132 INFO L93 Difference]: Finished difference Result 13491 states and 16730 transitions. [2022-01-10 06:49:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:49:49,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 71 [2022-01-10 06:49:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:49,144 INFO L225 Difference]: With dead ends: 13491 [2022-01-10 06:49:49,144 INFO L226 Difference]: Without dead ends: 11454 [2022-01-10 06:49:49,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 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 06:49:49,150 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 292 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:49,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 442 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11454 states. [2022-01-10 06:49:49,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11454 to 9644. [2022-01-10 06:49:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9644 states, 9643 states have (on average 1.2252411075391476) internal successors, (11815), 9643 states have internal predecessors, (11815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:49,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9644 states to 9644 states and 11815 transitions. [2022-01-10 06:49:49,583 INFO L78 Accepts]: Start accepts. Automaton has 9644 states and 11815 transitions. Word has length 71 [2022-01-10 06:49:49,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:49,583 INFO L470 AbstractCegarLoop]: Abstraction has 9644 states and 11815 transitions. [2022-01-10 06:49:49,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:49,583 INFO L276 IsEmpty]: Start isEmpty. Operand 9644 states and 11815 transitions. [2022-01-10 06:49:49,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 06:49:49,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:49,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:49,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-01-10 06:49:49,784 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 06:49:49,785 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:49,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:49,785 INFO L85 PathProgramCache]: Analyzing trace with hash 917119591, now seen corresponding path program 1 times [2022-01-10 06:49:49,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:49,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051621921] [2022-01-10 06:49:49,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:49,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:49,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:49,786 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 06:49:49,788 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 06:49:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:49,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:49:49,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:50,460 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 06:49:50,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:49:50,667 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 06:49:50,668 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:50,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051621921] [2022-01-10 06:49:50,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051621921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:49:50,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:49:50,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:49:50,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282967176] [2022-01-10 06:49:50,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:49:50,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:49:50,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:50,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:49:50,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:49:50,669 INFO L87 Difference]: Start difference. First operand 9644 states and 11815 transitions. Second operand has 16 states, 16 states have (on average 8.375) internal successors, (134), 15 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:51,325 INFO L93 Difference]: Finished difference Result 16557 states and 20311 transitions. [2022-01-10 06:49:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:49:51,325 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.375) internal successors, (134), 15 states have internal predecessors, (134), 0 states have call successors, (0), 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 74 [2022-01-10 06:49:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:51,338 INFO L225 Difference]: With dead ends: 16557 [2022-01-10 06:49:51,338 INFO L226 Difference]: Without dead ends: 11191 [2022-01-10 06:49:51,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:49:51,344 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 171 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:51,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 945 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2022-01-10 06:49:51,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11191 states. [2022-01-10 06:49:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11191 to 9632. [2022-01-10 06:49:51,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9632 states, 9631 states have (on average 1.2250025957844461) internal successors, (11798), 9631 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:51,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9632 states to 9632 states and 11798 transitions. [2022-01-10 06:49:51,724 INFO L78 Accepts]: Start accepts. Automaton has 9632 states and 11798 transitions. Word has length 74 [2022-01-10 06:49:51,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:51,724 INFO L470 AbstractCegarLoop]: Abstraction has 9632 states and 11798 transitions. [2022-01-10 06:49:51,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.375) internal successors, (134), 15 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:51,724 INFO L276 IsEmpty]: Start isEmpty. Operand 9632 states and 11798 transitions. [2022-01-10 06:49:51,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 06:49:51,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:51,725 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:51,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-01-10 06:49:51,929 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 06:49:51,930 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:51,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:51,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1609144279, now seen corresponding path program 1 times [2022-01-10 06:49:51,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:51,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591333519] [2022-01-10 06:49:51,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:51,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:51,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:51,931 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 06:49:51,932 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 06:49:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:51,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:49:51,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:52,439 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 06:49:52,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:49:52,734 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 06:49:52,734 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:52,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591333519] [2022-01-10 06:49:52,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591333519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:49:52,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:49:52,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:49:52,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274028347] [2022-01-10 06:49:52,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:49:52,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:49:52,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:52,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:49:52,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:49:52,735 INFO L87 Difference]: Start difference. First operand 9632 states and 11798 transitions. Second operand has 16 states, 16 states have (on average 7.9375) internal successors, (127), 15 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:53,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:53,334 INFO L93 Difference]: Finished difference Result 17298 states and 21193 transitions. [2022-01-10 06:49:53,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:49:53,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.9375) internal successors, (127), 15 states have internal predecessors, (127), 0 states have call successors, (0), 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 74 [2022-01-10 06:49:53,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:53,344 INFO L225 Difference]: With dead ends: 17298 [2022-01-10 06:49:53,345 INFO L226 Difference]: Without dead ends: 11336 [2022-01-10 06:49:53,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:49:53,349 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 139 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:53,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1069 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 216 Invalid, 0 Unknown, 111 Unchecked, 0.1s Time] [2022-01-10 06:49:53,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11336 states. [2022-01-10 06:49:53,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11336 to 9632. [2022-01-10 06:49:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9632 states, 9631 states have (on average 1.2247949330287613) internal successors, (11796), 9631 states have internal predecessors, (11796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9632 states to 9632 states and 11796 transitions. [2022-01-10 06:49:53,750 INFO L78 Accepts]: Start accepts. Automaton has 9632 states and 11796 transitions. Word has length 74 [2022-01-10 06:49:53,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:53,750 INFO L470 AbstractCegarLoop]: Abstraction has 9632 states and 11796 transitions. [2022-01-10 06:49:53,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.9375) internal successors, (127), 15 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 9632 states and 11796 transitions. [2022-01-10 06:49:53,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 06:49:53,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:53,751 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:53,757 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 06:49:53,952 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 06:49:53,952 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:53,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:53,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1127637932, now seen corresponding path program 1 times [2022-01-10 06:49:53,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:53,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552159867] [2022-01-10 06:49:53,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:53,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:53,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:53,954 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 06:49:53,954 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 06:49:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:53,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:49:53,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:49:54,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:54,073 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:54,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552159867] [2022-01-10 06:49:54,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552159867] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:54,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:54,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:49:54,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813194695] [2022-01-10 06:49:54,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:54,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:49:54,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:54,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:49:54,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:49:54,074 INFO L87 Difference]: Start difference. First operand 9632 states and 11796 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:54,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:54,379 INFO L93 Difference]: Finished difference Result 13110 states and 15984 transitions. [2022-01-10 06:49:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:49:54,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-01-10 06:49:54,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:54,386 INFO L225 Difference]: With dead ends: 13110 [2022-01-10 06:49:54,386 INFO L226 Difference]: Without dead ends: 8175 [2022-01-10 06:49:54,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 73 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 06:49:54,390 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 50 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:54,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 230 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:54,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8175 states. [2022-01-10 06:49:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8175 to 8161. [2022-01-10 06:49:54,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8161 states, 8160 states have (on average 1.2098039215686274) internal successors, (9872), 8160 states have internal predecessors, (9872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8161 states to 8161 states and 9872 transitions. [2022-01-10 06:49:54,746 INFO L78 Accepts]: Start accepts. Automaton has 8161 states and 9872 transitions. Word has length 75 [2022-01-10 06:49:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:54,746 INFO L470 AbstractCegarLoop]: Abstraction has 8161 states and 9872 transitions. [2022-01-10 06:49:54,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8161 states and 9872 transitions. [2022-01-10 06:49:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 06:49:54,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:54,747 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:54,755 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 06:49:54,947 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 06:49:54,948 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:54,948 INFO L85 PathProgramCache]: Analyzing trace with hash 268565864, now seen corresponding path program 1 times [2022-01-10 06:49:54,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:54,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541065059] [2022-01-10 06:49:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:54,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:54,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:54,949 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 06:49:54,950 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 06:49:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:54,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:49:54,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:49:55,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:55,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:55,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541065059] [2022-01-10 06:49:55,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541065059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:55,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:55,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:49:55,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617924418] [2022-01-10 06:49:55,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:55,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:49:55,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:55,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:49:55,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:49:55,090 INFO L87 Difference]: Start difference. First operand 8161 states and 9872 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:55,340 INFO L93 Difference]: Finished difference Result 9550 states and 11515 transitions. [2022-01-10 06:49:55,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:49:55,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-01-10 06:49:55,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:55,348 INFO L225 Difference]: With dead ends: 9550 [2022-01-10 06:49:55,348 INFO L226 Difference]: Without dead ends: 6839 [2022-01-10 06:49:55,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 73 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 06:49:55,351 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 49 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:55,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 257 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:55,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6839 states. [2022-01-10 06:49:55,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6839 to 5264. [2022-01-10 06:49:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5264 states, 5263 states have (on average 1.1930457913737411) internal successors, (6279), 5263 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:55,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 6279 transitions. [2022-01-10 06:49:55,583 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 6279 transitions. Word has length 75 [2022-01-10 06:49:55,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:55,583 INFO L470 AbstractCegarLoop]: Abstraction has 5264 states and 6279 transitions. [2022-01-10 06:49:55,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:55,583 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 6279 transitions. [2022-01-10 06:49:55,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 06:49:55,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:55,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:55,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-01-10 06:49:55,785 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 06:49:55,785 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:55,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:55,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1265407398, now seen corresponding path program 1 times [2022-01-10 06:49:55,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:55,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043345361] [2022-01-10 06:49:55,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:55,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:55,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:55,787 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 06:49:55,787 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 06:49:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:55,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:49:55,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:55,911 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 06:49:55,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:49:55,912 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:55,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043345361] [2022-01-10 06:49:55,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043345361] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:49:55,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:49:55,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:49:55,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428489360] [2022-01-10 06:49:55,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:49:55,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:49:55,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:55,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:49:55,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:49:55,913 INFO L87 Difference]: Start difference. First operand 5264 states and 6279 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:49:56,219 INFO L93 Difference]: Finished difference Result 8908 states and 10621 transitions. [2022-01-10 06:49:56,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:49:56,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-01-10 06:49:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:49:56,226 INFO L225 Difference]: With dead ends: 8908 [2022-01-10 06:49:56,226 INFO L226 Difference]: Without dead ends: 6938 [2022-01-10 06:49:56,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 73 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 06:49:56,228 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 75 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:49:56,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 181 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:49:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6938 states. [2022-01-10 06:49:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6938 to 5143. [2022-01-10 06:49:56,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5143 states, 5142 states have (on average 1.1880591209646052) internal successors, (6109), 5142 states have internal predecessors, (6109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:56,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5143 states to 5143 states and 6109 transitions. [2022-01-10 06:49:56,452 INFO L78 Accepts]: Start accepts. Automaton has 5143 states and 6109 transitions. Word has length 75 [2022-01-10 06:49:56,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:49:56,452 INFO L470 AbstractCegarLoop]: Abstraction has 5143 states and 6109 transitions. [2022-01-10 06:49:56,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:49:56,452 INFO L276 IsEmpty]: Start isEmpty. Operand 5143 states and 6109 transitions. [2022-01-10 06:49:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:49:56,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:49:56,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:49:56,459 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 06:49:56,653 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 06:49:56,654 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:49:56,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:49:56,654 INFO L85 PathProgramCache]: Analyzing trace with hash 679382839, now seen corresponding path program 1 times [2022-01-10 06:49:56,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:49:56,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992802131] [2022-01-10 06:49:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:49:56,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:49:56,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:49:56,655 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 06:49:56,656 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 06:49:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:49:56,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 06:49:56,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:49:58,136 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 06:49:58,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:49:59,012 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 06:49:59,013 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:49:59,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992802131] [2022-01-10 06:49:59,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992802131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:49:59,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:49:59,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2022-01-10 06:49:59,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275537768] [2022-01-10 06:49:59,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:49:59,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-10 06:49:59,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:49:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-10 06:49:59,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 06:49:59,015 INFO L87 Difference]: Start difference. First operand 5143 states and 6109 transitions. Second operand has 35 states, 35 states have (on average 4.0285714285714285) internal successors, (141), 35 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:01,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:50:01,756 INFO L93 Difference]: Finished difference Result 9458 states and 11120 transitions. [2022-01-10 06:50:01,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-10 06:50:01,756 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.0285714285714285) internal successors, (141), 35 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-01-10 06:50:01,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:50:01,765 INFO L225 Difference]: With dead ends: 9458 [2022-01-10 06:50:01,765 INFO L226 Difference]: Without dead ends: 8665 [2022-01-10 06:50:01,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=733, Invalid=3427, Unknown=0, NotChecked=0, Total=4160 [2022-01-10 06:50:01,768 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 1419 mSDsluCounter, 3742 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1419 SdHoareTripleChecker+Valid, 3962 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:50:01,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1419 Valid, 3962 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1400 Invalid, 0 Unknown, 351 Unchecked, 1.0s Time] [2022-01-10 06:50:01,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8665 states. [2022-01-10 06:50:02,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8665 to 5151. [2022-01-10 06:50:02,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5151 states, 5150 states have (on average 1.1854368932038835) internal successors, (6105), 5150 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:02,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5151 states to 5151 states and 6105 transitions. [2022-01-10 06:50:02,040 INFO L78 Accepts]: Start accepts. Automaton has 5151 states and 6105 transitions. Word has length 76 [2022-01-10 06:50:02,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:50:02,040 INFO L470 AbstractCegarLoop]: Abstraction has 5151 states and 6105 transitions. [2022-01-10 06:50:02,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.0285714285714285) internal successors, (141), 35 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:02,040 INFO L276 IsEmpty]: Start isEmpty. Operand 5151 states and 6105 transitions. [2022-01-10 06:50:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:50:02,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:50:02,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:50:02,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-01-10 06:50:02,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:50:02,250 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:50:02,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:50:02,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2010805447, now seen corresponding path program 1 times [2022-01-10 06:50:02,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:50:02,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975472346] [2022-01-10 06:50:02,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:50:02,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:50:02,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:50:02,252 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:50:02,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-01-10 06:50:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:50:02,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 06:50:02,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:50:04,068 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 06:50:04,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:50:05,096 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 06:50:05,096 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:50:05,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975472346] [2022-01-10 06:50:05,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975472346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:50:05,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:50:05,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2022-01-10 06:50:05,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477529975] [2022-01-10 06:50:05,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:50:05,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-10 06:50:05,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:50:05,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-10 06:50:05,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 06:50:05,097 INFO L87 Difference]: Start difference. First operand 5151 states and 6105 transitions. Second operand has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:07,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:50:07,646 INFO L93 Difference]: Finished difference Result 7903 states and 9262 transitions. [2022-01-10 06:50:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-10 06:50:07,646 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-01-10 06:50:07,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:50:07,654 INFO L225 Difference]: With dead ends: 7903 [2022-01-10 06:50:07,654 INFO L226 Difference]: Without dead ends: 7556 [2022-01-10 06:50:07,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=586, Invalid=3196, Unknown=0, NotChecked=0, Total=3782 [2022-01-10 06:50:07,657 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 977 mSDsluCounter, 3757 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 3966 SdHoareTripleChecker+Invalid, 2235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 812 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:50:07,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 3966 Invalid, 2235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1362 Invalid, 0 Unknown, 812 Unchecked, 0.9s Time] [2022-01-10 06:50:07,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7556 states. [2022-01-10 06:50:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7556 to 5158. [2022-01-10 06:50:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5158 states, 5157 states have (on average 1.1853790963738609) internal successors, (6113), 5157 states have internal predecessors, (6113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:07,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5158 states to 5158 states and 6113 transitions. [2022-01-10 06:50:07,959 INFO L78 Accepts]: Start accepts. Automaton has 5158 states and 6113 transitions. Word has length 76 [2022-01-10 06:50:07,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:50:07,959 INFO L470 AbstractCegarLoop]: Abstraction has 5158 states and 6113 transitions. [2022-01-10 06:50:07,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:07,959 INFO L276 IsEmpty]: Start isEmpty. Operand 5158 states and 6113 transitions. [2022-01-10 06:50:07,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:50:07,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:50:07,960 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:50:07,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-01-10 06:50:08,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:50:08,160 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:50:08,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:50:08,161 INFO L85 PathProgramCache]: Analyzing trace with hash -448613021, now seen corresponding path program 1 times [2022-01-10 06:50:08,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:50:08,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444308171] [2022-01-10 06:50:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:50:08,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:50:08,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:50:08,162 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:50:08,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-01-10 06:50:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:50:08,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:50:08,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:50:08,294 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 06:50:08,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:50:08,295 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:50:08,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444308171] [2022-01-10 06:50:08,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444308171] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:50:08,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:50:08,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:50:08,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463826460] [2022-01-10 06:50:08,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:50:08,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:50:08,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:50:08,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:50:08,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:50:08,298 INFO L87 Difference]: Start difference. First operand 5158 states and 6113 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:50:08,676 INFO L93 Difference]: Finished difference Result 9049 states and 10774 transitions. [2022-01-10 06:50:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:50:08,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-01-10 06:50:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:50:08,684 INFO L225 Difference]: With dead ends: 9049 [2022-01-10 06:50:08,684 INFO L226 Difference]: Without dead ends: 7582 [2022-01-10 06:50:08,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 74 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 06:50:08,686 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 64 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:50:08,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 185 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:50:08,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7582 states. [2022-01-10 06:50:08,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7582 to 5134. [2022-01-10 06:50:08,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5134 states, 5133 states have (on average 1.1829339567504384) internal successors, (6072), 5133 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5134 states to 5134 states and 6072 transitions. [2022-01-10 06:50:08,974 INFO L78 Accepts]: Start accepts. Automaton has 5134 states and 6072 transitions. Word has length 76 [2022-01-10 06:50:08,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:50:08,975 INFO L470 AbstractCegarLoop]: Abstraction has 5134 states and 6072 transitions. [2022-01-10 06:50:08,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:08,975 INFO L276 IsEmpty]: Start isEmpty. Operand 5134 states and 6072 transitions. [2022-01-10 06:50:08,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 06:50:08,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:50:08,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:50:08,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-01-10 06:50:09,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:50:09,179 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:50:09,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:50:09,180 INFO L85 PathProgramCache]: Analyzing trace with hash 628408284, now seen corresponding path program 1 times [2022-01-10 06:50:09,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:50:09,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36559081] [2022-01-10 06:50:09,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:50:09,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:50:09,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:50:09,181 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:50:09,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-01-10 06:50:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:50:09,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 06:50:09,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:50:11,206 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 06:50:11,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:50:12,538 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 06:50:12,538 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:50:12,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36559081] [2022-01-10 06:50:12,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36559081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:50:12,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:50:12,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2022-01-10 06:50:12,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22140685] [2022-01-10 06:50:12,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:50:12,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-10 06:50:12,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:50:12,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-10 06:50:12,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 06:50:12,540 INFO L87 Difference]: Start difference. First operand 5134 states and 6072 transitions. Second operand has 41 states, 41 states have (on average 3.4878048780487805) internal successors, (143), 41 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:50:16,077 INFO L93 Difference]: Finished difference Result 8683 states and 10221 transitions. [2022-01-10 06:50:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-10 06:50:16,078 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.4878048780487805) internal successors, (143), 41 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-10 06:50:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:50:16,085 INFO L225 Difference]: With dead ends: 8683 [2022-01-10 06:50:16,086 INFO L226 Difference]: Without dead ends: 8336 [2022-01-10 06:50:16,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=860, Invalid=4252, Unknown=0, NotChecked=0, Total=5112 [2022-01-10 06:50:16,088 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 1380 mSDsluCounter, 3819 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1380 SdHoareTripleChecker+Valid, 4043 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 556 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 06:50:16,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1380 Valid, 4043 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 982 Invalid, 0 Unknown, 556 Unchecked, 0.8s Time] [2022-01-10 06:50:16,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2022-01-10 06:50:16,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 5001. [2022-01-10 06:50:16,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5001 states, 5000 states have (on average 1.1814) internal successors, (5907), 5000 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:16,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5001 states to 5001 states and 5907 transitions. [2022-01-10 06:50:16,369 INFO L78 Accepts]: Start accepts. Automaton has 5001 states and 5907 transitions. Word has length 77 [2022-01-10 06:50:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:50:16,369 INFO L470 AbstractCegarLoop]: Abstraction has 5001 states and 5907 transitions. [2022-01-10 06:50:16,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.4878048780487805) internal successors, (143), 41 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 5001 states and 5907 transitions. [2022-01-10 06:50:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-10 06:50:16,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:50:16,370 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:50:16,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-01-10 06:50:16,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:50:16,571 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:50:16,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:50:16,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1535162022, now seen corresponding path program 2 times [2022-01-10 06:50:16,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:50:16,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302044099] [2022-01-10 06:50:16,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:50:16,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:50:16,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:50:16,573 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:50:16,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-01-10 06:50:16,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:50:16,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:50:16,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:50:16,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:50:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:50:16,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:50:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:50:16,965 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:50:16,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302044099] [2022-01-10 06:50:16,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302044099] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:50:16,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:50:16,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:50:16,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371580944] [2022-01-10 06:50:16,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:50:16,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:50:16,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:50:16,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:50:16,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:50:16,966 INFO L87 Difference]: Start difference. First operand 5001 states and 5907 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 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 06:50:17,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:50:17,319 INFO L93 Difference]: Finished difference Result 10457 states and 12391 transitions. [2022-01-10 06:50:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:50:17,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 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 92 [2022-01-10 06:50:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:50:17,326 INFO L225 Difference]: With dead ends: 10457 [2022-01-10 06:50:17,327 INFO L226 Difference]: Without dead ends: 6163 [2022-01-10 06:50:17,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:50:17,329 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 174 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:50:17,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 515 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2022-01-10 06:50:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6163 states. [2022-01-10 06:50:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6163 to 5910. [2022-01-10 06:50:17,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5910 states, 5909 states have (on average 1.1699103063124048) internal successors, (6913), 5909 states have internal predecessors, (6913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5910 states to 5910 states and 6913 transitions. [2022-01-10 06:50:17,654 INFO L78 Accepts]: Start accepts. Automaton has 5910 states and 6913 transitions. Word has length 92 [2022-01-10 06:50:17,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:50:17,655 INFO L470 AbstractCegarLoop]: Abstraction has 5910 states and 6913 transitions. [2022-01-10 06:50:17,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 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 06:50:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 5910 states and 6913 transitions. [2022-01-10 06:50:17,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 06:50:17,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:50:17,657 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:50:17,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-01-10 06:50:17,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:50:17,858 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:50:17,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:50:17,859 INFO L85 PathProgramCache]: Analyzing trace with hash 905399432, now seen corresponding path program 1 times [2022-01-10 06:50:17,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:50:17,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283023511] [2022-01-10 06:50:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:50:17,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:50:17,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:50:17,860 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:50:17,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-01-10 06:50:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:50:17,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:50:17,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:50:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 06:50:18,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:50:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 06:50:18,320 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:50:18,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283023511] [2022-01-10 06:50:18,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283023511] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:50:18,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:50:18,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:50:18,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877011750] [2022-01-10 06:50:18,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:50:18,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:50:18,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:50:18,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:50:18,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:50:18,321 INFO L87 Difference]: Start difference. First operand 5910 states and 6913 transitions. Second operand has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:18,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:50:18,916 INFO L93 Difference]: Finished difference Result 13339 states and 15792 transitions. [2022-01-10 06:50:18,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:50:18,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 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 113 [2022-01-10 06:50:18,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:50:18,925 INFO L225 Difference]: With dead ends: 13339 [2022-01-10 06:50:18,925 INFO L226 Difference]: Without dead ends: 9983 [2022-01-10 06:50:18,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 220 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 06:50:18,927 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 256 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:50:18,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 494 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2022-01-10 06:50:18,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9983 states. [2022-01-10 06:50:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9983 to 8674. [2022-01-10 06:50:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8674 states, 8673 states have (on average 1.1797532572350975) internal successors, (10232), 8673 states have internal predecessors, (10232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8674 states to 8674 states and 10232 transitions. [2022-01-10 06:50:19,458 INFO L78 Accepts]: Start accepts. Automaton has 8674 states and 10232 transitions. Word has length 113 [2022-01-10 06:50:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:50:19,458 INFO L470 AbstractCegarLoop]: Abstraction has 8674 states and 10232 transitions. [2022-01-10 06:50:19,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 8674 states and 10232 transitions. [2022-01-10 06:50:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-10 06:50:19,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:50:19,460 INFO L514 BasicCegarLoop]: trace histogram [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, 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 06:50:19,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-01-10 06:50:19,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:50:19,667 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:50:19,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:50:19,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1035493613, now seen corresponding path program 1 times [2022-01-10 06:50:19,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:50:19,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069333635] [2022-01-10 06:50:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:50:19,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:50:19,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:50:19,669 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:50:19,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-01-10 06:50:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:50:19,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:50:19,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:50:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-10 06:50:20,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:50:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-10 06:50:20,789 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:50:20,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069333635] [2022-01-10 06:50:20,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069333635] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:50:20,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:50:20,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:50:20,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987670472] [2022-01-10 06:50:20,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:50:20,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:50:20,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:50:20,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:50:20,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:50:20,790 INFO L87 Difference]: Start difference. First operand 8674 states and 10232 transitions. Second operand has 16 states, 16 states have (on average 11.125) internal successors, (178), 15 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:21,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:50:21,729 INFO L93 Difference]: Finished difference Result 14434 states and 17044 transitions. [2022-01-10 06:50:21,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:50:21,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.125) internal successors, (178), 15 states have internal predecessors, (178), 0 states have call successors, (0), 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 121 [2022-01-10 06:50:21,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:50:21,741 INFO L225 Difference]: With dead ends: 14434 [2022-01-10 06:50:21,741 INFO L226 Difference]: Without dead ends: 12188 [2022-01-10 06:50:21,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:50:21,746 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 169 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:50:21,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 1150 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 208 Invalid, 0 Unknown, 247 Unchecked, 0.1s Time] [2022-01-10 06:50:21,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12188 states. [2022-01-10 06:50:22,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12188 to 10467. [2022-01-10 06:50:22,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10467 states, 10466 states have (on average 1.177718326008026) internal successors, (12326), 10466 states have internal predecessors, (12326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 12326 transitions. [2022-01-10 06:50:22,425 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 12326 transitions. Word has length 121 [2022-01-10 06:50:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:50:22,425 INFO L470 AbstractCegarLoop]: Abstraction has 10467 states and 12326 transitions. [2022-01-10 06:50:22,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.125) internal successors, (178), 15 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:22,426 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 12326 transitions. [2022-01-10 06:50:22,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-10 06:50:22,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:50:22,428 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:50:22,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-01-10 06:50:22,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:50:22,628 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:50:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:50:22,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1107880171, now seen corresponding path program 1 times [2022-01-10 06:50:22,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:50:22,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451258009] [2022-01-10 06:50:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:50:22,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:50:22,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:50:22,630 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:50:22,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-01-10 06:50:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:50:22,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:50:22,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:50:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:50:23,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:50:23,187 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:50:23,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451258009] [2022-01-10 06:50:23,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451258009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:50:23,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:50:23,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:50:23,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609232508] [2022-01-10 06:50:23,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:50:23,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:50:23,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:50:23,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:50:23,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:50:23,188 INFO L87 Difference]: Start difference. First operand 10467 states and 12326 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:50:23,861 INFO L93 Difference]: Finished difference Result 12771 states and 15047 transitions. [2022-01-10 06:50:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:50:23,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 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 121 [2022-01-10 06:50:23,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:50:23,873 INFO L225 Difference]: With dead ends: 12771 [2022-01-10 06:50:23,873 INFO L226 Difference]: Without dead ends: 11157 [2022-01-10 06:50:23,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 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 06:50:23,878 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 74 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:50:23,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 327 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-01-10 06:50:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11157 states. [2022-01-10 06:50:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11157 to 11155. [2022-01-10 06:50:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 11154 states have (on average 1.1753630984400216) internal successors, (13110), 11154 states have internal predecessors, (13110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:24,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 13110 transitions. [2022-01-10 06:50:24,600 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 13110 transitions. Word has length 121 [2022-01-10 06:50:24,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:50:24,600 INFO L470 AbstractCegarLoop]: Abstraction has 11155 states and 13110 transitions. [2022-01-10 06:50:24,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:50:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 13110 transitions. [2022-01-10 06:50:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-10 06:50:24,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:50:24,602 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:50:24,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-01-10 06:50:24,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:50:24,803 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:50:24,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:50:24,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1341719959, now seen corresponding path program 1 times [2022-01-10 06:50:24,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:50:24,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533806467] [2022-01-10 06:50:24,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:50:24,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:50:24,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:50:24,805 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:50:24,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-01-10 06:50:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:50:24,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:50:24,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:50:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 57 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:50:25,922 INFO L328 TraceCheckSpWp]: Computing backward predicates...