/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/nla-digbench-scaling/divbin_valuebound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:06:45,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:06:45,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:06:45,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:06:45,842 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 03:06:45,856 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:06:45,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:06:45,856 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:06:45,856 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:06:45,857 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:06:45,857 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:06:45,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:06:45,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:06:45,857 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:06:45,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:06:45,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:06:45,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:06:45,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:06:45,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:06:45,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:06:45,858 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:06:45,858 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:06:45,858 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:06:45,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:06:45,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:06:45,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:06:45,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:06:45,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:06:45,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:06:45,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:06:45,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:06:45,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:06:45,859 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:06:45,859 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:06:45,859 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:06:45,859 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:06:45,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:06:45,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:06:45,860 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:06:46,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:06:46,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:06:46,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:06:46,022 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:06:46,023 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:06:46,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound5.i [2022-01-10 03:06:46,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42ce375a6/c33f77f8ee214969ab22096b5c901140/FLAG02ef04d11 [2022-01-10 03:06:46,447 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:06:46,448 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound5.i [2022-01-10 03:06:46,452 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42ce375a6/c33f77f8ee214969ab22096b5c901140/FLAG02ef04d11 [2022-01-10 03:06:46,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42ce375a6/c33f77f8ee214969ab22096b5c901140 [2022-01-10 03:06:46,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:06:46,464 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:06:46,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:06:46,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:06:46,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:06:46,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:06:46" (1/1) ... [2022-01-10 03:06:46,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d15981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:06:46, skipping insertion in model container [2022-01-10 03:06:46,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:06:46" (1/1) ... [2022-01-10 03:06:46,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:06:46,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:06:46,660 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound5.i[950,963] [2022-01-10 03:06:46,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:06:46,690 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:06:46,702 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound5.i[950,963] [2022-01-10 03:06:46,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:06:46,729 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:06:46,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:06:46 WrapperNode [2022-01-10 03:06:46,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:06:46,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:06:46,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:06:46,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:06:46,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:06:46" (1/1) ... [2022-01-10 03:06:46,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:06:46" (1/1) ... [2022-01-10 03:06:46,757 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-01-10 03:06:46,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:06:46,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:06:46,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:06:46,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:06:46,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:06:46" (1/1) ... [2022-01-10 03:06:46,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:06:46" (1/1) ... [2022-01-10 03:06:46,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:06:46" (1/1) ... [2022-01-10 03:06:46,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:06:46" (1/1) ... [2022-01-10 03:06:46,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:06:46" (1/1) ... [2022-01-10 03:06:46,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:06:46" (1/1) ... [2022-01-10 03:06:46,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:06:46" (1/1) ... [2022-01-10 03:06:46,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:06:46,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:06:46,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:06:46,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:06:46,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:06:46" (1/1) ... [2022-01-10 03:06:46,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:06:46,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:06:46,817 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 03:06:46,835 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 03:06:46,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:06:46,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:06:46,846 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:06:46,846 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:06:46,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:06:46,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:06:46,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 03:06:46,846 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 03:06:46,892 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:06:46,894 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:06:47,045 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:06:47,049 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:06:47,049 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 03:06:47,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:06:47 BoogieIcfgContainer [2022-01-10 03:06:47,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:06:47,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:06:47,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:06:47,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:06:47,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:06:46" (1/3) ... [2022-01-10 03:06:47,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cf2edba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:06:47, skipping insertion in model container [2022-01-10 03:06:47,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:06:46" (2/3) ... [2022-01-10 03:06:47,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cf2edba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:06:47, skipping insertion in model container [2022-01-10 03:06:47,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:06:47" (3/3) ... [2022-01-10 03:06:47,065 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound5.i [2022-01-10 03:06:47,068 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:06:47,068 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:06:47,137 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:06:47,149 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 03:06:47,149 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:06:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 03:06:47,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 03:06:47,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:06:47,169 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:06:47,170 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:06:47,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:06:47,178 INFO L85 PathProgramCache]: Analyzing trace with hash 913242413, now seen corresponding path program 1 times [2022-01-10 03:06:47,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:06:47,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480318032] [2022-01-10 03:06:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:06:47,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:06:47,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:06:47,191 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 03:06:47,205 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 03:06:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:06:47,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:06:47,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:06:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 03:06:47,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:06:47,339 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:06:47,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480318032] [2022-01-10 03:06:47,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480318032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:06:47,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:06:47,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:06:47,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136108512] [2022-01-10 03:06:47,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:06:47,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:06:47,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:06:47,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:06:47,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:06:47,366 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 03:06:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:06:47,379 INFO L93 Difference]: Finished difference Result 55 states and 84 transitions. [2022-01-10 03:06:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:06:47,380 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-01-10 03:06:47,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:06:47,385 INFO L225 Difference]: With dead ends: 55 [2022-01-10 03:06:47,385 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 03:06:47,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 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 03:06:47,393 INFO L933 BasicCegarLoop]: 35 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, 35 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 03:06:47,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:06:47,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 03:06:47,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-10 03:06:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:06:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-01-10 03:06:47,417 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 30 [2022-01-10 03:06:47,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:06:47,417 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-01-10 03:06:47,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 03:06:47,418 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-01-10 03:06:47,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 03:06:47,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:06:47,419 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:06:47,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 03:06:47,625 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 03:06:47,626 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:06:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:06:47,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2061833476, now seen corresponding path program 1 times [2022-01-10 03:06:47,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:06:47,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41678923] [2022-01-10 03:06:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:06:47,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:06:47,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:06:47,628 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 03:06:47,630 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 03:06:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:06:47,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 03:06:47,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:06:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 03:06:47,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:06:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 03:06:48,245 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:06:48,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41678923] [2022-01-10 03:06:48,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41678923] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:06:48,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:06:48,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-01-10 03:06:48,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412848398] [2022-01-10 03:06:48,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:06:48,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:06:48,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:06:48,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:06:48,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-10 03:06:48,254 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 03:06:48,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:06:48,328 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-01-10 03:06:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:06:48,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2022-01-10 03:06:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:06:48,333 INFO L225 Difference]: With dead ends: 35 [2022-01-10 03:06:48,333 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 03:06:48,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:06:48,334 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:06:48,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2022-01-10 03:06:48,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 03:06:48,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 03:06:48,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 03:06:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-01-10 03:06:48,347 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 31 [2022-01-10 03:06:48,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:06:48,348 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-01-10 03:06:48,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 03:06:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-01-10 03:06:48,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 03:06:48,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:06:48,349 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:06:48,358 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 03:06:48,558 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 03:06:48,558 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:06:48,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:06:48,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1044269705, now seen corresponding path program 1 times [2022-01-10 03:06:48,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:06:48,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601278047] [2022-01-10 03:06:48,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:06:48,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:06:48,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:06:48,561 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 03:06:48,562 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 03:06:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:06:48,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 03:06:48,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:06:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 03:06:48,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:06:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 03:06:49,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:06:49,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601278047] [2022-01-10 03:06:49,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601278047] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:06:49,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:06:49,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-01-10 03:06:49,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296562352] [2022-01-10 03:06:49,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:06:49,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:06:49,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:06:49,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:06:49,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-10 03:06:49,548 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 03:06:49,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:06:49,630 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-01-10 03:06:49,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:06:49,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-01-10 03:06:49,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:06:49,631 INFO L225 Difference]: With dead ends: 41 [2022-01-10 03:06:49,631 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 03:06:49,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:06:49,632 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:06:49,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 114 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-01-10 03:06:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 03:06:49,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2022-01-10 03:06:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 03:06:49,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-01-10 03:06:49,638 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 33 [2022-01-10 03:06:49,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:06:49,638 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-01-10 03:06:49,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 03:06:49,638 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-01-10 03:06:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 03:06:49,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:06:49,639 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 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 03:06:49,649 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 03:06:49,847 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 03:06:49,848 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:06:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:06:49,848 INFO L85 PathProgramCache]: Analyzing trace with hash -328713508, now seen corresponding path program 1 times [2022-01-10 03:06:49,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:06:49,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083547951] [2022-01-10 03:06:49,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:06:49,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:06:49,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:06:49,851 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 03:06:49,852 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 03:06:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:06:49,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:06:49,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:06:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 03:06:50,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:06:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 03:06:50,612 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:06:50,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083547951] [2022-01-10 03:06:50,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083547951] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:06:50,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:06:50,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-01-10 03:06:50,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599871359] [2022-01-10 03:06:50,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:06:50,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 03:06:50,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:06:50,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 03:06:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-10 03:06:50,614 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 03:06:51,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:06:51,085 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-01-10 03:06:51,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:06:51,087 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-01-10 03:06:51,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:06:51,088 INFO L225 Difference]: With dead ends: 45 [2022-01-10 03:06:51,088 INFO L226 Difference]: Without dead ends: 38 [2022-01-10 03:06:51,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-10 03:06:51,090 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:06:51,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 146 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 03:06:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-10 03:06:51,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-01-10 03:06:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 03:06:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-01-10 03:06:51,095 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 37 [2022-01-10 03:06:51,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:06:51,096 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-01-10 03:06:51,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 03:06:51,096 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-01-10 03:06:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 03:06:51,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:06:51,097 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:06:51,103 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 03:06:51,303 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 03:06:51,303 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:06:51,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:06:51,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1786164585, now seen corresponding path program 1 times [2022-01-10 03:06:51,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:06:51,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681721486] [2022-01-10 03:06:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:06:51,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:06:51,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:06:51,305 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 03:06:51,307 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 03:06:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:06:51,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:06:51,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:06:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 03:06:51,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:06:51,398 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:06:51,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681721486] [2022-01-10 03:06:51,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681721486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:06:51,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:06:51,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:06:51,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785741260] [2022-01-10 03:06:51,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:06:51,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:06:51,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:06:51,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:06:51,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:06:51,399 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:06:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:06:51,420 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-01-10 03:06:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:06:51,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-01-10 03:06:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:06:51,423 INFO L225 Difference]: With dead ends: 45 [2022-01-10 03:06:51,423 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 03:06:51,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 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 03:06:51,425 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:06:51,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:06:51,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 03:06:51,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-10 03:06:51,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 03:06:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-01-10 03:06:51,434 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 39 [2022-01-10 03:06:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:06:51,434 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-01-10 03:06:51,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:06:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-01-10 03:06:51,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 03:06:51,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:06:51,435 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:06:51,447 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 03:06:51,636 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 03:06:51,636 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:06:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:06:51,637 INFO L85 PathProgramCache]: Analyzing trace with hash 145189394, now seen corresponding path program 1 times [2022-01-10 03:06:51,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:06:51,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196561648] [2022-01-10 03:06:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:06:51,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:06:51,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:06:51,638 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 03:06:51,639 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 03:06:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:06:51,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-10 03:06:51,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:06:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 03:06:52,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:06:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 03:06:54,246 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:06:54,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196561648] [2022-01-10 03:06:54,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196561648] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:06:54,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:06:54,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2022-01-10 03:06:54,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146806767] [2022-01-10 03:06:54,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:06:54,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 03:06:54,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:06:54,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 03:06:54,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-10 03:06:54,248 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-10 03:06:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:06:55,173 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-01-10 03:06:55,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 03:06:55,178 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 41 [2022-01-10 03:06:55,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:06:55,179 INFO L225 Difference]: With dead ends: 61 [2022-01-10 03:06:55,179 INFO L226 Difference]: Without dead ends: 59 [2022-01-10 03:06:55,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-01-10 03:06:55,180 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 03:06:55,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 225 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 161 Invalid, 0 Unknown, 15 Unchecked, 0.7s Time] [2022-01-10 03:06:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-10 03:06:55,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2022-01-10 03:06:55,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-10 03:06:55,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-01-10 03:06:55,188 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 41 [2022-01-10 03:06:55,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:06:55,188 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-01-10 03:06:55,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-10 03:06:55,188 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-01-10 03:06:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 03:06:55,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:06:55,189 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:06:55,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 03:06:55,396 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 03:06:55,397 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:06:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:06:55,397 INFO L85 PathProgramCache]: Analyzing trace with hash 202447696, now seen corresponding path program 1 times [2022-01-10 03:06:55,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:06:55,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445323437] [2022-01-10 03:06:55,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:06:55,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:06:55,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:06:55,398 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 03:06:55,399 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 03:06:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:06:55,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 03:06:55,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:06:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 03:06:55,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:06:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 03:06:56,845 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:06:56,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445323437] [2022-01-10 03:06:56,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445323437] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:06:56,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:06:56,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2022-01-10 03:06:56,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84468679] [2022-01-10 03:06:56,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:06:56,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 03:06:56,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:06:56,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 03:06:56,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-01-10 03:06:56,846 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-10 03:06:57,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:06:57,615 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2022-01-10 03:06:57,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 03:06:57,615 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 41 [2022-01-10 03:06:57,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:06:57,616 INFO L225 Difference]: With dead ends: 75 [2022-01-10 03:06:57,616 INFO L226 Difference]: Without dead ends: 65 [2022-01-10 03:06:57,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-10 03:06:57,617 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 03:06:57,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 182 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 143 Invalid, 0 Unknown, 20 Unchecked, 0.6s Time] [2022-01-10 03:06:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-10 03:06:57,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2022-01-10 03:06:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.170731707317073) internal successors, (48), 42 states have internal predecessors, (48), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-10 03:06:57,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-01-10 03:06:57,622 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 41 [2022-01-10 03:06:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:06:57,623 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-01-10 03:06:57,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-10 03:06:57,623 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-01-10 03:06:57,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 03:06:57,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:06:57,623 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:06:57,632 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 03:06:57,832 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 03:06:57,834 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:06:57,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:06:57,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1669889848, now seen corresponding path program 2 times [2022-01-10 03:06:57,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:06:57,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763382655] [2022-01-10 03:06:57,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:06:57,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:06:57,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:06:57,836 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 03:06:57,836 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 03:06:57,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:06:57,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:06:57,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-10 03:06:57,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:06:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 03:06:58,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:07:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 03:07:00,716 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:07:00,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763382655] [2022-01-10 03:07:00,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763382655] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:07:00,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:07:00,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2022-01-10 03:07:00,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692118520] [2022-01-10 03:07:00,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:07:00,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 03:07:00,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:07:00,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 03:07:00,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-10 03:07:00,717 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-10 03:07:02,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:07:02,425 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2022-01-10 03:07:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 03:07:02,427 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 45 [2022-01-10 03:07:02,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:07:02,428 INFO L225 Difference]: With dead ends: 89 [2022-01-10 03:07:02,428 INFO L226 Difference]: Without dead ends: 87 [2022-01-10 03:07:02,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-01-10 03:07:02,429 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:07:02,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 337 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 231 Invalid, 0 Unknown, 39 Unchecked, 1.1s Time] [2022-01-10 03:07:02,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-10 03:07:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2022-01-10 03:07:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 58 states have internal predecessors, (63), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-10 03:07:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2022-01-10 03:07:02,438 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 45 [2022-01-10 03:07:02,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:07:02,438 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2022-01-10 03:07:02,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-10 03:07:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2022-01-10 03:07:02,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-10 03:07:02,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:07:02,441 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:07:02,449 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 03:07:02,648 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 03:07:02,649 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:07:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:07:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2114474925, now seen corresponding path program 3 times [2022-01-10 03:07:02,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:07:02,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575685524] [2022-01-10 03:07:02,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:07:02,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:07:02,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:07:02,651 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 03:07:02,651 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 03:07:02,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 03:07:02,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:07:02,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 03:07:02,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:07:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 03:07:02,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:07:02,997 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:07:02,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575685524] [2022-01-10 03:07:02,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575685524] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:07:02,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [348393200] [2022-01-10 03:07:02,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:07:02,998 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:07:02,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:07:03,000 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 03:07:03,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-01-10 03:07:03,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 03:07:03,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:07:03,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:07:03,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:07:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 03:07:03,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:07:03,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [348393200] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:07:03,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:07:03,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2022-01-10 03:07:03,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446825953] [2022-01-10 03:07:03,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:07:03,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 03:07:03,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:07:03,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 03:07:03,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:07:03,457 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 03:07:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:07:03,657 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2022-01-10 03:07:03,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 03:07:03,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 49 [2022-01-10 03:07:03,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:07:03,661 INFO L225 Difference]: With dead ends: 89 [2022-01-10 03:07:03,661 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 03:07:03,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-01-10 03:07:03,661 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:07:03,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 164 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:07:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 03:07:03,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-01-10 03:07:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 52 states have internal predecessors, (56), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-10 03:07:03,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2022-01-10 03:07:03,668 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 49 [2022-01-10 03:07:03,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:07:03,668 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2022-01-10 03:07:03,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 03:07:03,669 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2022-01-10 03:07:03,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 03:07:03,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:07:03,670 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:07:03,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-01-10 03:07:03,883 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 03:07:04,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:07:04,077 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:07:04,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:07:04,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1596822888, now seen corresponding path program 4 times [2022-01-10 03:07:04,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:07:04,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233339769] [2022-01-10 03:07:04,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:07:04,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:07:04,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:07:04,078 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 03:07:04,080 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 03:07:04,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 03:07:04,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:07:04,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 03:07:04,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:07:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 03:07:05,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:07:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 03:07:11,965 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:07:11,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233339769] [2022-01-10 03:07:11,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233339769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:07:11,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:07:11,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 29 [2022-01-10 03:07:11,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581280361] [2022-01-10 03:07:11,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:07:11,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 03:07:11,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:07:11,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 03:07:11,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-01-10 03:07:11,967 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-10 03:07:14,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:07:14,984 INFO L93 Difference]: Finished difference Result 102 states and 120 transitions. [2022-01-10 03:07:14,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 03:07:14,986 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 51 [2022-01-10 03:07:14,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:07:14,987 INFO L225 Difference]: With dead ends: 102 [2022-01-10 03:07:14,987 INFO L226 Difference]: Without dead ends: 100 [2022-01-10 03:07:14,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 03:07:14,989 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:07:14,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 247 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 187 Invalid, 0 Unknown, 27 Unchecked, 2.1s Time] [2022-01-10 03:07:14,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-10 03:07:14,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2022-01-10 03:07:14,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 68 states have internal predecessors, (77), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-10 03:07:14,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2022-01-10 03:07:14,997 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 51 [2022-01-10 03:07:14,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:07:14,997 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2022-01-10 03:07:14,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-10 03:07:14,997 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2022-01-10 03:07:14,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 03:07:14,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:07:14,998 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:07:15,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 03:07:15,205 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 03:07:15,206 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:07:15,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:07:15,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1654081190, now seen corresponding path program 1 times [2022-01-10 03:07:15,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:07:15,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527774352] [2022-01-10 03:07:15,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:07:15,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:07:15,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:07:15,208 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 03:07:15,208 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 03:07:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:07:15,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 03:07:15,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:07:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 03:07:16,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:07:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 03:07:22,780 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:07:22,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527774352] [2022-01-10 03:07:22,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527774352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:07:22,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:07:22,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 27 [2022-01-10 03:07:22,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036369771] [2022-01-10 03:07:22,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:07:22,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 03:07:22,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:07:22,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 03:07:22,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-01-10 03:07:22,782 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 24 states have internal predecessors, (51), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-10 03:07:28,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:07:28,453 INFO L93 Difference]: Finished difference Result 120 states and 145 transitions. [2022-01-10 03:07:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-10 03:07:28,453 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 24 states have internal predecessors, (51), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 51 [2022-01-10 03:07:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:07:28,454 INFO L225 Difference]: With dead ends: 120 [2022-01-10 03:07:28,454 INFO L226 Difference]: Without dead ends: 118 [2022-01-10 03:07:28,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 03:07:28,455 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-10 03:07:28,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 285 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 220 Invalid, 0 Unknown, 37 Unchecked, 2.6s Time] [2022-01-10 03:07:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-10 03:07:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2022-01-10 03:07:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 80 states have internal predecessors, (92), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-10 03:07:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 128 transitions. [2022-01-10 03:07:28,466 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 128 transitions. Word has length 51 [2022-01-10 03:07:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:07:28,467 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 128 transitions. [2022-01-10 03:07:28,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 24 states have internal predecessors, (51), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-10 03:07:28,467 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 128 transitions. [2022-01-10 03:07:28,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 03:07:28,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:07:28,467 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:07:28,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 03:07:28,671 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 03:07:28,671 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:07:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:07:28,672 INFO L85 PathProgramCache]: Analyzing trace with hash 585705638, now seen corresponding path program 2 times [2022-01-10 03:07:28,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:07:28,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763777167] [2022-01-10 03:07:28,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:07:28,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:07:28,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:07:28,673 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 03:07:28,675 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 03:07:28,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:07:28,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:07:28,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 03:07:28,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:07:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 03:07:28,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:07:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 03:07:29,118 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:07:29,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763777167] [2022-01-10 03:07:29,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763777167] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:07:29,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:07:29,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-01-10 03:07:29,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169016996] [2022-01-10 03:07:29,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:07:29,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:07:29,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:07:29,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:07:29,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:07:29,120 INFO L87 Difference]: Start difference. First operand 106 states and 128 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 03:07:29,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:07:29,153 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2022-01-10 03:07:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:07:29,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2022-01-10 03:07:29,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:07:29,154 INFO L225 Difference]: With dead ends: 126 [2022-01-10 03:07:29,154 INFO L226 Difference]: Without dead ends: 100 [2022-01-10 03:07:29,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:07:29,155 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:07:29,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:07:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-10 03:07:29,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-01-10 03:07:29,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 75 states have internal predecessors, (85), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-10 03:07:29,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-01-10 03:07:29,163 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 51 [2022-01-10 03:07:29,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:07:29,163 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-01-10 03:07:29,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 03:07:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-01-10 03:07:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 03:07:29,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:07:29,164 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:07:29,171 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 03:07:29,371 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 03:07:29,371 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:07:29,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:07:29,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1009830147, now seen corresponding path program 5 times [2022-01-10 03:07:29,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:07:29,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546240345] [2022-01-10 03:07:29,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 03:07:29,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:07:29,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:07:29,373 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 03:07:29,374 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 03:07:29,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-10 03:07:29,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:07:29,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 03:07:29,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:07:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 03:07:29,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:07:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 03:07:32,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:07:32,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546240345] [2022-01-10 03:07:32,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546240345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:07:32,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:07:32,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2022-01-10 03:07:32,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450998623] [2022-01-10 03:07:32,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:07:32,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 03:07:32,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:07:32,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 03:07:32,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-10 03:07:32,107 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 19 states have internal predecessors, (55), 11 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2022-01-10 03:07:35,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:07:35,337 INFO L93 Difference]: Finished difference Result 147 states and 179 transitions. [2022-01-10 03:07:35,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 03:07:35,340 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 19 states have internal predecessors, (55), 11 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) Word has length 59 [2022-01-10 03:07:35,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:07:35,341 INFO L225 Difference]: With dead ends: 147 [2022-01-10 03:07:35,341 INFO L226 Difference]: Without dead ends: 79 [2022-01-10 03:07:35,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 03:07:35,342 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 54 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:07:35,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 372 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 03:07:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-10 03:07:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2022-01-10 03:07:35,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.125) internal successors, (63), 57 states have internal predecessors, (63), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-10 03:07:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-01-10 03:07:35,349 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 59 [2022-01-10 03:07:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:07:35,349 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-01-10 03:07:35,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 19 states have internal predecessors, (55), 11 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2022-01-10 03:07:35,350 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-01-10 03:07:35,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 03:07:35,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:07:35,350 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:07:35,360 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 03:07:35,558 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 03:07:35,558 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:07:35,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:07:35,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2021171970, now seen corresponding path program 6 times [2022-01-10 03:07:35,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:07:35,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337154874] [2022-01-10 03:07:35,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 03:07:35,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:07:35,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:07:35,560 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 03:07:35,567 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 03:07:35,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-10 03:07:35,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:07:35,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-10 03:07:35,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:07:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 03:07:36,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:07:41,004 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:07:41,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337154874] [2022-01-10 03:07:41,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337154874] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:07:41,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [883264991] [2022-01-10 03:07:41,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 03:07:41,005 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:07:41,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:07:41,006 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 03:07:41,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-01-10 03:07:41,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-10 03:07:41,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:07:41,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 03:07:41,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:07:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 03:07:42,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:07:43,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [883264991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:07:43,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:07:43,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 21 [2022-01-10 03:07:43,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186754829] [2022-01-10 03:07:43,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:07:43,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 03:07:43,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:07:43,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 03:07:43,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-01-10 03:07:43,801 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-10 03:07:44,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:07:44,403 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2022-01-10 03:07:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 03:07:44,404 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 61 [2022-01-10 03:07:44,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:07:44,404 INFO L225 Difference]: With dead ends: 86 [2022-01-10 03:07:44,404 INFO L226 Difference]: Without dead ends: 60 [2022-01-10 03:07:44,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 176 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=344, Invalid=1726, Unknown=0, NotChecked=0, Total=2070 [2022-01-10 03:07:44,405 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:07:44,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 211 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-01-10 03:07:44,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-10 03:07:44,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-01-10 03:07:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 03:07:44,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-01-10 03:07:44,411 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 61 [2022-01-10 03:07:44,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:07:44,412 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-01-10 03:07:44,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-10 03:07:44,412 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-01-10 03:07:44,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 03:07:44,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:07:44,412 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:07:44,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-01-10 03:07:44,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-01-10 03:07:44,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:07:44,815 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:07:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:07:44,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1262678076, now seen corresponding path program 3 times [2022-01-10 03:07:44,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:07:44,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991414176] [2022-01-10 03:07:44,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:07:44,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:07:44,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:07:44,817 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 03:07:44,818 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 03:07:44,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 03:07:44,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:07:44,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-10 03:07:44,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:07:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 28 refuted. 2 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 03:07:47,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:07:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 03:07:56,390 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:07:56,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991414176] [2022-01-10 03:07:56,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991414176] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:07:56,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:07:56,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2022-01-10 03:07:56,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302633388] [2022-01-10 03:07:56,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:07:56,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-10 03:07:56,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:07:56,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-10 03:07:56,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=930, Unknown=1, NotChecked=0, Total=1122 [2022-01-10 03:07:56,392 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 31 states have internal predecessors, (61), 10 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14)