/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_floodmax.3.1.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:46:16,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:46:16,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:46:16,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:46:16,707 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 06:46:16,723 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:46:16,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:46:16,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:46:16,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:46:16,724 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:46:16,725 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:46:16,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:46:16,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:46:16,725 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:46:16,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:46:16,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:46:16,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:46:16,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:46:16,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:46:16,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:46:16,726 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:46:16,726 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:46:16,727 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:46:16,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:46:16,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:46:16,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:46:16,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:46:16,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:46:16,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:46:16,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:46:16,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:46:16,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:46:16,728 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:46:16,728 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:46:16,728 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:46:16,728 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:46:16,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:46:16,728 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:46:16,729 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:46:16,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:46:16,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:46:16,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:46:16,933 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:46:16,934 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:46:16,935 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c [2022-01-10 06:46:16,990 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cc32fc3b/6f151f074c534f868c9bb1353ef7c58f/FLAG150ba1b21 [2022-01-10 06:46:17,347 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:46:17,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c [2022-01-10 06:46:17,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cc32fc3b/6f151f074c534f868c9bb1353ef7c58f/FLAG150ba1b21 [2022-01-10 06:46:17,744 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cc32fc3b/6f151f074c534f868c9bb1353ef7c58f [2022-01-10 06:46:17,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:46:17,747 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:46:17,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:46:17,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:46:17,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:46:17,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:46:17" (1/1) ... [2022-01-10 06:46:17,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2599f260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:17, skipping insertion in model container [2022-01-10 06:46:17,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:46:17" (1/1) ... [2022-01-10 06:46:17,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:46:17,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:46:17,993 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_floodmax.3.1.ufo.BOUNDED-6.pals.c[11348,11361] [2022-01-10 06:46:17,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:46:18,004 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:46:18,044 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_floodmax.3.1.ufo.BOUNDED-6.pals.c[11348,11361] [2022-01-10 06:46:18,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:46:18,059 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:46:18,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:18 WrapperNode [2022-01-10 06:46:18,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:46:18,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:46:18,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:46:18,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:46:18,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:18" (1/1) ... [2022-01-10 06:46:18,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:18" (1/1) ... [2022-01-10 06:46:18,103 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 409 [2022-01-10 06:46:18,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:46:18,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:46:18,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:46:18,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:46:18,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:18" (1/1) ... [2022-01-10 06:46:18,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:18" (1/1) ... [2022-01-10 06:46:18,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:18" (1/1) ... [2022-01-10 06:46:18,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:18" (1/1) ... [2022-01-10 06:46:18,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:18" (1/1) ... [2022-01-10 06:46:18,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:18" (1/1) ... [2022-01-10 06:46:18,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:18" (1/1) ... [2022-01-10 06:46:18,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:46:18,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:46:18,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:46:18,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:46:18,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:18" (1/1) ... [2022-01-10 06:46:18,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:46:18,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:46:18,192 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 06:46:18,213 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 06:46:18,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:46:18,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:46:18,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:46:18,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:46:18,360 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:46:18,362 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:46:18,748 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:46:18,756 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:46:18,756 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:46:18,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:46:18 BoogieIcfgContainer [2022-01-10 06:46:18,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:46:18,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:46:18,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:46:18,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:46:18,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:46:17" (1/3) ... [2022-01-10 06:46:18,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48376941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:46:18, skipping insertion in model container [2022-01-10 06:46:18,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:18" (2/3) ... [2022-01-10 06:46:18,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48376941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:46:18, skipping insertion in model container [2022-01-10 06:46:18,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:46:18" (3/3) ... [2022-01-10 06:46:18,774 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c [2022-01-10 06:46:18,778 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:46:18,778 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:46:18,842 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:46:18,851 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 06:46:18,851 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:46:18,879 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 123 states have (on average 1.7479674796747968) internal successors, (215), 124 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:18,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 06:46:18,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:18,890 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] [2022-01-10 06:46:18,890 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:18,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:18,896 INFO L85 PathProgramCache]: Analyzing trace with hash 632685314, now seen corresponding path program 1 times [2022-01-10 06:46:18,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:18,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748715985] [2022-01-10 06:46:18,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:18,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:18,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:18,908 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 06:46:18,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:46:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:19,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:46:19,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:19,163 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 06:46:19,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:19,164 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:19,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748715985] [2022-01-10 06:46:19,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748715985] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:19,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:19,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:46:19,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010288047] [2022-01-10 06:46:19,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:19,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:46:19,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:19,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:46:19,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:46:19,204 INFO L87 Difference]: Start difference. First operand has 125 states, 123 states have (on average 1.7479674796747968) internal successors, (215), 124 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:19,228 INFO L93 Difference]: Finished difference Result 200 states and 340 transitions. [2022-01-10 06:46:19,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:46:19,230 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2022-01-10 06:46:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:19,238 INFO L225 Difference]: With dead ends: 200 [2022-01-10 06:46:19,238 INFO L226 Difference]: Without dead ends: 121 [2022-01-10 06:46:19,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:46:19,245 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:19,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-10 06:46:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-01-10 06:46:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.7333333333333334) internal successors, (208), 120 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 208 transitions. [2022-01-10 06:46:19,280 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 208 transitions. Word has length 37 [2022-01-10 06:46:19,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:19,281 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 208 transitions. [2022-01-10 06:46:19,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 208 transitions. [2022-01-10 06:46:19,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 06:46:19,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:19,284 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] [2022-01-10 06:46:19,296 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 06:46:19,493 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 06:46:19,493 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:19,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:19,494 INFO L85 PathProgramCache]: Analyzing trace with hash -184963136, now seen corresponding path program 1 times [2022-01-10 06:46:19,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:19,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891667911] [2022-01-10 06:46:19,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:19,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:19,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:19,496 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 06:46:19,497 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 06:46:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:19,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:46:19,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:19,680 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 06:46:19,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:19,680 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:19,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891667911] [2022-01-10 06:46:19,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891667911] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:19,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:19,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:46:19,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416074415] [2022-01-10 06:46:19,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:19,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:19,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:19,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:19,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:19,684 INFO L87 Difference]: Start difference. First operand 121 states and 208 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:19,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:19,784 INFO L93 Difference]: Finished difference Result 265 states and 448 transitions. [2022-01-10 06:46:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:46:19,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2022-01-10 06:46:19,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:19,790 INFO L225 Difference]: With dead ends: 265 [2022-01-10 06:46:19,791 INFO L226 Difference]: Without dead ends: 191 [2022-01-10 06:46:19,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 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 06:46:19,793 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 120 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:19,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 790 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-10 06:46:19,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 121. [2022-01-10 06:46:19,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.5583333333333333) internal successors, (187), 120 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:19,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 187 transitions. [2022-01-10 06:46:19,808 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 187 transitions. Word has length 37 [2022-01-10 06:46:19,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:19,809 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 187 transitions. [2022-01-10 06:46:19,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:19,809 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 187 transitions. [2022-01-10 06:46:19,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 06:46:19,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:19,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:19,827 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 06:46:20,019 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 06:46:20,020 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:20,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1843152740, now seen corresponding path program 1 times [2022-01-10 06:46:20,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:20,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758127605] [2022-01-10 06:46:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:20,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:20,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:20,023 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 06:46:20,024 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 06:46:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:20,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:20,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:20,250 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 06:46:20,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:20,250 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:20,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758127605] [2022-01-10 06:46:20,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758127605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:20,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:20,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:20,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740167559] [2022-01-10 06:46:20,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:20,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:20,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:20,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:20,253 INFO L87 Difference]: Start difference. First operand 121 states and 187 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:20,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:20,289 INFO L93 Difference]: Finished difference Result 252 states and 406 transitions. [2022-01-10 06:46:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:20,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2022-01-10 06:46:20,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:20,291 INFO L225 Difference]: With dead ends: 252 [2022-01-10 06:46:20,292 INFO L226 Difference]: Without dead ends: 182 [2022-01-10 06:46:20,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 55 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 06:46:20,293 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 93 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:20,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 415 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:20,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-10 06:46:20,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2022-01-10 06:46:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.5754189944134078) internal successors, (282), 179 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 282 transitions. [2022-01-10 06:46:20,311 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 282 transitions. Word has length 57 [2022-01-10 06:46:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:20,311 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 282 transitions. [2022-01-10 06:46:20,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 282 transitions. [2022-01-10 06:46:20,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 06:46:20,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:20,315 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:20,326 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 06:46:20,526 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 06:46:20,526 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:20,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:20,527 INFO L85 PathProgramCache]: Analyzing trace with hash 700379209, now seen corresponding path program 1 times [2022-01-10 06:46:20,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:20,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561498592] [2022-01-10 06:46:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:20,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:20,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:20,529 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 06:46:20,532 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 06:46:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:20,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:20,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:20,738 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 06:46:20,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:20,738 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:20,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561498592] [2022-01-10 06:46:20,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561498592] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:20,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:20,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:20,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770360653] [2022-01-10 06:46:20,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:20,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:20,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:20,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:20,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:20,744 INFO L87 Difference]: Start difference. First operand 180 states and 282 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:20,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:20,760 INFO L93 Difference]: Finished difference Result 307 states and 495 transitions. [2022-01-10 06:46:20,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:20,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2022-01-10 06:46:20,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:20,762 INFO L225 Difference]: With dead ends: 307 [2022-01-10 06:46:20,762 INFO L226 Difference]: Without dead ends: 237 [2022-01-10 06:46:20,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 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 06:46:20,771 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 102 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 429 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 06:46:20,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 429 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-10 06:46:20,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2022-01-10 06:46:20,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.5982905982905984) internal successors, (374), 234 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:20,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 374 transitions. [2022-01-10 06:46:20,791 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 374 transitions. Word has length 59 [2022-01-10 06:46:20,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:20,792 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 374 transitions. [2022-01-10 06:46:20,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:20,792 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 374 transitions. [2022-01-10 06:46:20,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 06:46:20,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:20,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:20,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:21,004 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 06:46:21,005 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:21,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1943315629, now seen corresponding path program 1 times [2022-01-10 06:46:21,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:21,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147804608] [2022-01-10 06:46:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:21,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:21,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:21,007 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 06:46:21,008 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 06:46:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:21,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:21,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:21,201 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 06:46:21,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:21,202 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:21,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147804608] [2022-01-10 06:46:21,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147804608] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:21,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:21,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:21,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293429268] [2022-01-10 06:46:21,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:21,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:21,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:21,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:21,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:21,209 INFO L87 Difference]: Start difference. First operand 235 states and 374 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:21,252 INFO L93 Difference]: Finished difference Result 683 states and 1085 transitions. [2022-01-10 06:46:21,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:21,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2022-01-10 06:46:21,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:21,256 INFO L225 Difference]: With dead ends: 683 [2022-01-10 06:46:21,256 INFO L226 Difference]: Without dead ends: 457 [2022-01-10 06:46:21,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:21,258 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 381 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:21,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 451 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:21,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-01-10 06:46:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 455. [2022-01-10 06:46:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 1.5814977973568283) internal successors, (718), 454 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 718 transitions. [2022-01-10 06:46:21,277 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 718 transitions. Word has length 59 [2022-01-10 06:46:21,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:21,279 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 718 transitions. [2022-01-10 06:46:21,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:21,279 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 718 transitions. [2022-01-10 06:46:21,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 06:46:21,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:21,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:21,297 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 06:46:21,493 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 06:46:21,493 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:21,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:21,494 INFO L85 PathProgramCache]: Analyzing trace with hash 187609759, now seen corresponding path program 1 times [2022-01-10 06:46:21,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:21,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925863688] [2022-01-10 06:46:21,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:21,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:21,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:21,496 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 06:46:21,498 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 06:46:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:21,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:21,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:21,660 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 06:46:21,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:21,661 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:21,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925863688] [2022-01-10 06:46:21,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925863688] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:21,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:21,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:21,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700607199] [2022-01-10 06:46:21,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:21,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:21,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:21,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:21,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:21,663 INFO L87 Difference]: Start difference. First operand 455 states and 718 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:21,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:21,684 INFO L93 Difference]: Finished difference Result 1327 states and 2092 transitions. [2022-01-10 06:46:21,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:21,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-01-10 06:46:21,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:21,688 INFO L225 Difference]: With dead ends: 1327 [2022-01-10 06:46:21,688 INFO L226 Difference]: Without dead ends: 900 [2022-01-10 06:46:21,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 58 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 06:46:21,691 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 176 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:21,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 526 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-01-10 06:46:21,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 457. [2022-01-10 06:46:21,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.5789473684210527) internal successors, (720), 456 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:21,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 720 transitions. [2022-01-10 06:46:21,710 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 720 transitions. Word has length 60 [2022-01-10 06:46:21,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:21,711 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 720 transitions. [2022-01-10 06:46:21,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:21,711 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 720 transitions. [2022-01-10 06:46:21,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 06:46:21,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:21,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:21,723 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 06:46:21,920 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 06:46:21,921 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:21,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1607792334, now seen corresponding path program 1 times [2022-01-10 06:46:21,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:21,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121474365] [2022-01-10 06:46:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:21,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:21,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:21,923 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 06:46:21,925 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 06:46:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:21,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:21,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:22,105 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 06:46:22,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:22,106 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:22,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121474365] [2022-01-10 06:46:22,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121474365] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:22,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:22,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:22,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344264266] [2022-01-10 06:46:22,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:22,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:22,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:22,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:22,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:22,108 INFO L87 Difference]: Start difference. First operand 457 states and 720 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:22,158 INFO L93 Difference]: Finished difference Result 1331 states and 2098 transitions. [2022-01-10 06:46:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:22,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-10 06:46:22,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:22,163 INFO L225 Difference]: With dead ends: 1331 [2022-01-10 06:46:22,163 INFO L226 Difference]: Without dead ends: 886 [2022-01-10 06:46:22,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:22,165 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 374 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:22,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 449 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-10 06:46:22,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 884. [2022-01-10 06:46:22,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 1.563986409966025) internal successors, (1381), 883 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:22,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1381 transitions. [2022-01-10 06:46:22,193 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1381 transitions. Word has length 61 [2022-01-10 06:46:22,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:22,193 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 1381 transitions. [2022-01-10 06:46:22,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1381 transitions. [2022-01-10 06:46:22,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 06:46:22,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:22,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:22,211 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 06:46:22,409 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 06:46:22,409 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:22,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1120134337, now seen corresponding path program 1 times [2022-01-10 06:46:22,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:22,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495538125] [2022-01-10 06:46:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:22,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:22,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:22,411 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 06:46:22,412 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 06:46:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:22,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:22,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:22,633 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 06:46:22,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:22,634 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:22,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495538125] [2022-01-10 06:46:22,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495538125] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:22,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:22,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:22,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977314266] [2022-01-10 06:46:22,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:22,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:22,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:22,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:22,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:22,636 INFO L87 Difference]: Start difference. First operand 884 states and 1381 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:22,680 INFO L93 Difference]: Finished difference Result 2194 states and 3525 transitions. [2022-01-10 06:46:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:22,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-10 06:46:22,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:22,687 INFO L225 Difference]: With dead ends: 2194 [2022-01-10 06:46:22,687 INFO L226 Difference]: Without dead ends: 1500 [2022-01-10 06:46:22,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 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 06:46:22,689 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 95 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:22,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 422 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:22,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2022-01-10 06:46:22,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1498. [2022-01-10 06:46:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 1.5838343353373414) internal successors, (2371), 1497 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 2371 transitions. [2022-01-10 06:46:22,734 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 2371 transitions. Word has length 61 [2022-01-10 06:46:22,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:22,734 INFO L470 AbstractCegarLoop]: Abstraction has 1498 states and 2371 transitions. [2022-01-10 06:46:22,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:22,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 2371 transitions. [2022-01-10 06:46:22,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 06:46:22,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:22,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:22,747 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 06:46:22,944 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 06:46:22,945 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:22,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:22,945 INFO L85 PathProgramCache]: Analyzing trace with hash -538838364, now seen corresponding path program 1 times [2022-01-10 06:46:22,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:22,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044767028] [2022-01-10 06:46:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:22,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:22,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:22,947 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 06:46:22,949 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 06:46:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:23,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:23,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:23,105 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 06:46:23,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:23,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:23,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044767028] [2022-01-10 06:46:23,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044767028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:23,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:23,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:23,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901876331] [2022-01-10 06:46:23,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:23,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:23,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:23,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:23,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:23,107 INFO L87 Difference]: Start difference. First operand 1498 states and 2371 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:23,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:23,156 INFO L93 Difference]: Finished difference Result 2744 states and 4403 transitions. [2022-01-10 06:46:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:23,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 06:46:23,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:23,163 INFO L225 Difference]: With dead ends: 2744 [2022-01-10 06:46:23,163 INFO L226 Difference]: Without dead ends: 2050 [2022-01-10 06:46:23,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:23,167 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 96 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 415 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 06:46:23,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 415 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:23,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2022-01-10 06:46:23,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 2048. [2022-01-10 06:46:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 1.585246702491451) internal successors, (3245), 2047 states have internal predecessors, (3245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3245 transitions. [2022-01-10 06:46:23,232 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3245 transitions. Word has length 63 [2022-01-10 06:46:23,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:23,232 INFO L470 AbstractCegarLoop]: Abstraction has 2048 states and 3245 transitions. [2022-01-10 06:46:23,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:23,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3245 transitions. [2022-01-10 06:46:23,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 06:46:23,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:23,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:23,242 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 06:46:23,442 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 06:46:23,442 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:23,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:23,443 INFO L85 PathProgramCache]: Analyzing trace with hash 495024814, now seen corresponding path program 1 times [2022-01-10 06:46:23,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:23,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268068468] [2022-01-10 06:46:23,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:23,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:23,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:23,445 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 06:46:23,480 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 06:46:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:23,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:23,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:23,640 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 06:46:23,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:23,641 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:23,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268068468] [2022-01-10 06:46:23,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268068468] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:23,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:23,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:23,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895279728] [2022-01-10 06:46:23,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:23,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:23,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:23,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:23,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:23,642 INFO L87 Difference]: Start difference. First operand 2048 states and 3245 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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 06:46:23,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:23,762 INFO L93 Difference]: Finished difference Result 6004 states and 9511 transitions. [2022-01-10 06:46:23,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:23,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 06:46:23,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:23,777 INFO L225 Difference]: With dead ends: 6004 [2022-01-10 06:46:23,777 INFO L226 Difference]: Without dead ends: 4002 [2022-01-10 06:46:23,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:23,783 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 359 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:23,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 437 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:23,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2022-01-10 06:46:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 4000. [2022-01-10 06:46:23,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4000 states, 3999 states have (on average 1.574143535883971) internal successors, (6295), 3999 states have internal predecessors, (6295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4000 states to 4000 states and 6295 transitions. [2022-01-10 06:46:23,920 INFO L78 Accepts]: Start accepts. Automaton has 4000 states and 6295 transitions. Word has length 63 [2022-01-10 06:46:23,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:23,920 INFO L470 AbstractCegarLoop]: Abstraction has 4000 states and 6295 transitions. [2022-01-10 06:46:23,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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 06:46:23,920 INFO L276 IsEmpty]: Start isEmpty. Operand 4000 states and 6295 transitions. [2022-01-10 06:46:23,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 06:46:23,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:23,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:23,935 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 06:46:24,135 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 06:46:24,135 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:24,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1802918790, now seen corresponding path program 1 times [2022-01-10 06:46:24,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:24,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213123007] [2022-01-10 06:46:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:24,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:24,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:24,137 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 06:46:24,138 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 06:46:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:24,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:24,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:24,292 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 06:46:24,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:24,292 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:24,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213123007] [2022-01-10 06:46:24,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213123007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:24,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:24,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:24,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948755657] [2022-01-10 06:46:24,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:24,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:24,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:24,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:24,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:24,294 INFO L87 Difference]: Start difference. First operand 4000 states and 6295 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 06:46:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:24,453 INFO L93 Difference]: Finished difference Result 11876 states and 18693 transitions. [2022-01-10 06:46:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:24,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 64 [2022-01-10 06:46:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:24,482 INFO L225 Difference]: With dead ends: 11876 [2022-01-10 06:46:24,483 INFO L226 Difference]: Without dead ends: 7950 [2022-01-10 06:46:24,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 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 06:46:24,490 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 162 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:24,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 502 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:24,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7950 states. [2022-01-10 06:46:24,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7950 to 4008. [2022-01-10 06:46:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 4007 states have (on average 1.572997254804093) internal successors, (6303), 4007 states have internal predecessors, (6303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:24,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 6303 transitions. [2022-01-10 06:46:24,680 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 6303 transitions. Word has length 64 [2022-01-10 06:46:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:24,680 INFO L470 AbstractCegarLoop]: Abstraction has 4008 states and 6303 transitions. [2022-01-10 06:46:24,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 06:46:24,680 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 6303 transitions. [2022-01-10 06:46:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:46:24,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:24,682 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:24,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:24,890 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 06:46:24,891 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:24,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:24,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1828456361, now seen corresponding path program 1 times [2022-01-10 06:46:24,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:24,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810163720] [2022-01-10 06:46:24,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:24,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:24,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:24,893 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 06:46:24,895 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 06:46:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:24,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:24,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:25,106 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 06:46:25,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:25,106 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:25,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810163720] [2022-01-10 06:46:25,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810163720] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:25,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:25,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:25,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353060328] [2022-01-10 06:46:25,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:25,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:25,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:25,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:25,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:25,108 INFO L87 Difference]: Start difference. First operand 4008 states and 6303 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:25,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:25,298 INFO L93 Difference]: Finished difference Result 11740 states and 18450 transitions. [2022-01-10 06:46:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:25,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 06:46:25,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:25,325 INFO L225 Difference]: With dead ends: 11740 [2022-01-10 06:46:25,325 INFO L226 Difference]: Without dead ends: 7787 [2022-01-10 06:46:25,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:25,333 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 357 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:25,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 438 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:25,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7787 states. [2022-01-10 06:46:25,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7787 to 7785. [2022-01-10 06:46:25,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7785 states, 7784 states have (on average 1.5545991778006167) internal successors, (12101), 7784 states have internal predecessors, (12101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:25,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7785 states to 7785 states and 12101 transitions. [2022-01-10 06:46:25,594 INFO L78 Accepts]: Start accepts. Automaton has 7785 states and 12101 transitions. Word has length 65 [2022-01-10 06:46:25,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:25,595 INFO L470 AbstractCegarLoop]: Abstraction has 7785 states and 12101 transitions. [2022-01-10 06:46:25,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:25,595 INFO L276 IsEmpty]: Start isEmpty. Operand 7785 states and 12101 transitions. [2022-01-10 06:46:25,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:46:25,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:25,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:25,607 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 06:46:25,806 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 06:46:25,806 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:25,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:25,806 INFO L85 PathProgramCache]: Analyzing trace with hash -45664870, now seen corresponding path program 1 times [2022-01-10 06:46:25,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:25,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737733501] [2022-01-10 06:46:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:25,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:25,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:25,808 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 06:46:25,808 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 06:46:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:25,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:25,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:26,001 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 06:46:26,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:26,002 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:26,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737733501] [2022-01-10 06:46:26,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737733501] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:26,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:26,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:26,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576986213] [2022-01-10 06:46:26,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:26,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:26,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:26,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:26,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:26,003 INFO L87 Difference]: Start difference. First operand 7785 states and 12101 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:26,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:26,297 INFO L93 Difference]: Finished difference Result 20941 states and 33031 transitions. [2022-01-10 06:46:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:26,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 06:46:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:26,332 INFO L225 Difference]: With dead ends: 20941 [2022-01-10 06:46:26,333 INFO L226 Difference]: Without dead ends: 13931 [2022-01-10 06:46:26,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:26,347 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 89 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:26,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 358 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:26,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13931 states. [2022-01-10 06:46:26,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13931 to 13929. [2022-01-10 06:46:26,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13929 states, 13928 states have (on average 1.5580844342331992) internal successors, (21701), 13928 states have internal predecessors, (21701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13929 states to 13929 states and 21701 transitions. [2022-01-10 06:46:26,854 INFO L78 Accepts]: Start accepts. Automaton has 13929 states and 21701 transitions. Word has length 65 [2022-01-10 06:46:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:26,854 INFO L470 AbstractCegarLoop]: Abstraction has 13929 states and 21701 transitions. [2022-01-10 06:46:26,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 13929 states and 21701 transitions. [2022-01-10 06:46:26,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 06:46:26,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:26,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:26,869 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 06:46:27,066 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 06:46:27,066 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:27,067 INFO L85 PathProgramCache]: Analyzing trace with hash -743415671, now seen corresponding path program 1 times [2022-01-10 06:46:27,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:27,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425446343] [2022-01-10 06:46:27,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:27,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:27,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:27,069 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 06:46:27,070 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 06:46:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:27,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:27,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:27,278 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 06:46:27,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:27,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:27,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425446343] [2022-01-10 06:46:27,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425446343] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:27,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:27,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:27,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868395623] [2022-01-10 06:46:27,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:27,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:27,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:27,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:27,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:27,279 INFO L87 Difference]: Start difference. First operand 13929 states and 21701 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 06:46:27,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:27,930 INFO L93 Difference]: Finished difference Result 40821 states and 63599 transitions. [2022-01-10 06:46:27,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:27,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 67 [2022-01-10 06:46:27,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:27,999 INFO L225 Difference]: With dead ends: 40821 [2022-01-10 06:46:27,999 INFO L226 Difference]: Without dead ends: 27051 [2022-01-10 06:46:28,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:28,061 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 416 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:28,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 354 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:28,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27051 states. [2022-01-10 06:46:28,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27051 to 27049. [2022-01-10 06:46:28,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27049 states, 27048 states have (on average 1.5429236912156168) internal successors, (41733), 27048 states have internal predecessors, (41733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:28,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27049 states to 27049 states and 41733 transitions. [2022-01-10 06:46:28,953 INFO L78 Accepts]: Start accepts. Automaton has 27049 states and 41733 transitions. Word has length 67 [2022-01-10 06:46:28,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:28,953 INFO L470 AbstractCegarLoop]: Abstraction has 27049 states and 41733 transitions. [2022-01-10 06:46:28,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 06:46:28,953 INFO L276 IsEmpty]: Start isEmpty. Operand 27049 states and 41733 transitions. [2022-01-10 06:46:28,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 06:46:28,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:28,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:28,970 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 06:46:29,170 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 06:46:29,170 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:29,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:29,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1678461823, now seen corresponding path program 1 times [2022-01-10 06:46:29,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:29,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940085818] [2022-01-10 06:46:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:29,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:29,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:29,173 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 06:46:29,174 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 06:46:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:29,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:29,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:29,345 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 06:46:29,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:29,346 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:29,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940085818] [2022-01-10 06:46:29,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940085818] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:29,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:29,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:29,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327025422] [2022-01-10 06:46:29,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:29,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:29,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:29,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:29,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:29,348 INFO L87 Difference]: Start difference. First operand 27049 states and 41733 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 06:46:29,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:29,991 INFO L93 Difference]: Finished difference Result 50925 states and 79335 transitions. [2022-01-10 06:46:29,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:29,992 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 67 [2022-01-10 06:46:29,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:30,083 INFO L225 Difference]: With dead ends: 50925 [2022-01-10 06:46:30,083 INFO L226 Difference]: Without dead ends: 37243 [2022-01-10 06:46:30,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 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 06:46:30,108 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 90 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 411 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 06:46:30,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 411 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:30,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37243 states. [2022-01-10 06:46:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37243 to 37241. [2022-01-10 06:46:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37241 states, 37240 states have (on average 1.5404135338345866) internal successors, (57365), 37240 states have internal predecessors, (57365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37241 states to 37241 states and 57365 transitions. [2022-01-10 06:46:31,304 INFO L78 Accepts]: Start accepts. Automaton has 37241 states and 57365 transitions. Word has length 67 [2022-01-10 06:46:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:31,304 INFO L470 AbstractCegarLoop]: Abstraction has 37241 states and 57365 transitions. [2022-01-10 06:46:31,304 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 06:46:31,304 INFO L276 IsEmpty]: Start isEmpty. Operand 37241 states and 57365 transitions. [2022-01-10 06:46:31,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:46:31,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:31,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:31,322 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 06:46:31,522 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 06:46:31,522 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:31,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:31,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1769194283, now seen corresponding path program 1 times [2022-01-10 06:46:31,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:31,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612176024] [2022-01-10 06:46:31,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:31,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:31,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:31,524 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 06:46:31,525 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 06:46:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:31,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:31,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:31,683 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 06:46:31,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:31,684 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:31,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612176024] [2022-01-10 06:46:31,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612176024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:31,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:31,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:31,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453962553] [2022-01-10 06:46:31,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:31,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:31,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:31,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:31,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:31,685 INFO L87 Difference]: Start difference. First operand 37241 states and 57365 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 06:46:33,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:33,038 INFO L93 Difference]: Finished difference Result 110525 states and 170599 transitions. [2022-01-10 06:46:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:33,039 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 06:46:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:33,189 INFO L225 Difference]: With dead ends: 110525 [2022-01-10 06:46:33,190 INFO L226 Difference]: Without dead ends: 74251 [2022-01-10 06:46:33,241 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 06:46:33,242 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 148 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:33,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 510 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:33,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74251 states. [2022-01-10 06:46:34,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74251 to 37273. [2022-01-10 06:46:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37273 states, 37272 states have (on average 1.5399495599914144) internal successors, (57397), 37272 states have internal predecessors, (57397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37273 states to 37273 states and 57397 transitions. [2022-01-10 06:46:34,676 INFO L78 Accepts]: Start accepts. Automaton has 37273 states and 57397 transitions. Word has length 68 [2022-01-10 06:46:34,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:34,676 INFO L470 AbstractCegarLoop]: Abstraction has 37273 states and 57397 transitions. [2022-01-10 06:46:34,676 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 06:46:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 37273 states and 57397 transitions. [2022-01-10 06:46:34,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:46:34,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:34,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:34,689 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 06:46:34,888 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 06:46:34,888 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:34,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:34,889 INFO L85 PathProgramCache]: Analyzing trace with hash -821083838, now seen corresponding path program 1 times [2022-01-10 06:46:34,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:34,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335147137] [2022-01-10 06:46:34,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:34,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:34,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:34,890 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 06:46:34,893 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 06:46:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:34,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:46:34,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:35,512 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 06:46:35,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:35,513 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:35,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335147137] [2022-01-10 06:46:35,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335147137] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:35,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:35,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:46:35,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410731130] [2022-01-10 06:46:35,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:35,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:46:35,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:35,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:46:35,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:46:35,515 INFO L87 Difference]: Start difference. First operand 37273 states and 57397 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:36,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:36,697 INFO L93 Difference]: Finished difference Result 55449 states and 85520 transitions. [2022-01-10 06:46:36,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:46:36,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-10 06:46:36,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:36,751 INFO L225 Difference]: With dead ends: 55449 [2022-01-10 06:46:36,752 INFO L226 Difference]: Without dead ends: 37303 [2022-01-10 06:46:36,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 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 06:46:36,768 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 137 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:36,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 667 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2022-01-10 06:46:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37303 states. [2022-01-10 06:46:37,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37303 to 37278. [2022-01-10 06:46:37,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37278 states, 37277 states have (on average 1.53990396222872) internal successors, (57403), 37277 states have internal predecessors, (57403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37278 states to 37278 states and 57403 transitions. [2022-01-10 06:46:37,801 INFO L78 Accepts]: Start accepts. Automaton has 37278 states and 57403 transitions. Word has length 69 [2022-01-10 06:46:37,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:37,801 INFO L470 AbstractCegarLoop]: Abstraction has 37278 states and 57403 transitions. [2022-01-10 06:46:37,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:37,801 INFO L276 IsEmpty]: Start isEmpty. Operand 37278 states and 57403 transitions. [2022-01-10 06:46:37,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:46:37,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:37,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:37,816 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 06:46:38,013 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 06:46:38,014 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:38,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:38,014 INFO L85 PathProgramCache]: Analyzing trace with hash -428056828, now seen corresponding path program 1 times [2022-01-10 06:46:38,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:38,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184498151] [2022-01-10 06:46:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:38,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:38,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:38,016 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 06:46:38,018 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 06:46:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:38,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:38,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:38,203 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 06:46:38,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:38,203 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:38,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184498151] [2022-01-10 06:46:38,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184498151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:38,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:38,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:38,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487294882] [2022-01-10 06:46:38,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:38,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:38,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:38,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:38,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:38,205 INFO L87 Difference]: Start difference. First operand 37278 states and 57403 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 06:46:40,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:40,090 INFO L93 Difference]: Finished difference Result 109887 states and 169189 transitions. [2022-01-10 06:46:40,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:40,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 06:46:40,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:40,215 INFO L225 Difference]: With dead ends: 109887 [2022-01-10 06:46:40,215 INFO L226 Difference]: Without dead ends: 72860 [2022-01-10 06:46:40,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:40,247 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 352 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:40,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 437 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:40,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72860 states. [2022-01-10 06:46:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72860 to 72858. [2022-01-10 06:46:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72858 states, 72857 states have (on average 1.526950052843241) internal successors, (111249), 72857 states have internal predecessors, (111249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:42,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72858 states to 72858 states and 111249 transitions. [2022-01-10 06:46:42,403 INFO L78 Accepts]: Start accepts. Automaton has 72858 states and 111249 transitions. Word has length 69 [2022-01-10 06:46:42,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:42,403 INFO L470 AbstractCegarLoop]: Abstraction has 72858 states and 111249 transitions. [2022-01-10 06:46:42,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 06:46:42,404 INFO L276 IsEmpty]: Start isEmpty. Operand 72858 states and 111249 transitions. [2022-01-10 06:46:42,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:46:42,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:42,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:42,419 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 06:46:42,618 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 06:46:42,619 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:42,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:42,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1756747381, now seen corresponding path program 1 times [2022-01-10 06:46:42,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:42,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730973389] [2022-01-10 06:46:42,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:42,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:42,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:42,621 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 06:46:42,624 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 06:46:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:42,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:46:42,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:43,029 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 06:46:43,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:43,030 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:43,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730973389] [2022-01-10 06:46:43,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730973389] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:43,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:43,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:46:43,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918742607] [2022-01-10 06:46:43,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:43,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:43,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:43,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:43,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:43,033 INFO L87 Difference]: Start difference. First operand 72858 states and 111249 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 06:46:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:47,995 INFO L93 Difference]: Finished difference Result 281186 states and 436693 transitions. [2022-01-10 06:46:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:47,996 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 69 [2022-01-10 06:46:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:48,575 INFO L225 Difference]: With dead ends: 281186 [2022-01-10 06:46:48,575 INFO L226 Difference]: Without dead ends: 211488 [2022-01-10 06:46:48,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 65 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 06:46:48,663 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 453 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:48,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 628 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:48,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211488 states. [2022-01-10 06:46:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211488 to 179994. [2022-01-10 06:46:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179994 states, 179993 states have (on average 1.5219314084436617) internal successors, (273937), 179993 states have internal predecessors, (273937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179994 states to 179994 states and 273937 transitions. [2022-01-10 06:46:54,820 INFO L78 Accepts]: Start accepts. Automaton has 179994 states and 273937 transitions. Word has length 69 [2022-01-10 06:46:54,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:54,821 INFO L470 AbstractCegarLoop]: Abstraction has 179994 states and 273937 transitions. [2022-01-10 06:46:54,821 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 06:46:54,821 INFO L276 IsEmpty]: Start isEmpty. Operand 179994 states and 273937 transitions. [2022-01-10 06:46:54,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 06:46:54,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:54,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:54,831 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 06:46:55,026 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 06:46:55,026 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:55,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:55,027 INFO L85 PathProgramCache]: Analyzing trace with hash 996728578, now seen corresponding path program 1 times [2022-01-10 06:46:55,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:55,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123920807] [2022-01-10 06:46:55,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:55,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:55,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:55,028 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 06:46:55,029 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 06:46:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:55,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:55,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:55,297 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 06:46:55,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:55,297 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:55,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123920807] [2022-01-10 06:46:55,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123920807] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:55,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:55,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:55,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691128314] [2022-01-10 06:46:55,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:55,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:55,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:55,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:55,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:55,298 INFO L87 Difference]: Start difference. First operand 179994 states and 273937 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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 06:47:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:03,819 INFO L93 Difference]: Finished difference Result 498528 states and 767444 transitions. [2022-01-10 06:47:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:03,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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 70 [2022-01-10 06:47:03,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:04,567 INFO L225 Difference]: With dead ends: 498528 [2022-01-10 06:47:04,567 INFO L226 Difference]: Without dead ends: 321694 [2022-01-10 06:47:04,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:04,725 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 243 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:04,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 603 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:47:04,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321694 states. [2022-01-10 06:47:13,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321694 to 288858. [2022-01-10 06:47:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288858 states, 288857 states have (on average 1.52286079271058) internal successors, (439889), 288857 states have internal predecessors, (439889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:15,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288858 states to 288858 states and 439889 transitions. [2022-01-10 06:47:15,068 INFO L78 Accepts]: Start accepts. Automaton has 288858 states and 439889 transitions. Word has length 70 [2022-01-10 06:47:15,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:15,068 INFO L470 AbstractCegarLoop]: Abstraction has 288858 states and 439889 transitions. [2022-01-10 06:47:15,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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 06:47:15,068 INFO L276 IsEmpty]: Start isEmpty. Operand 288858 states and 439889 transitions. [2022-01-10 06:47:15,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 06:47:15,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:15,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:15,086 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 06:47:15,282 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 06:47:15,282 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:15,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:15,283 INFO L85 PathProgramCache]: Analyzing trace with hash -920013492, now seen corresponding path program 1 times [2022-01-10 06:47:15,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:15,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969749344] [2022-01-10 06:47:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:15,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:15,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:15,288 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 06:47:15,290 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 06:47:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:15,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:15,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:15,545 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 06:47:15,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:15,545 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:15,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969749344] [2022-01-10 06:47:15,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969749344] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:15,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:15,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:15,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777279053] [2022-01-10 06:47:15,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:15,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:15,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:15,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:15,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:15,546 INFO L87 Difference]: Start difference. First operand 288858 states and 439889 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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)