/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/recursive-simple/fibo_2calls_15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:38:02,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:38:02,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:38:02,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:38:02,423 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:38:02,458 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:38:02,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:38:02,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:38:02,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:38:02,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:38:02,460 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:38:02,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:38:02,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:38:02,461 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:38:02,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:38:02,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:38:02,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:38:02,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:38:02,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:38:02,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:38:02,462 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:38:02,462 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:38:02,462 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:38:02,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:38:02,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:38:02,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:38:02,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:38:02,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:38:02,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:38:02,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:38:02,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:38:02,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:38:02,464 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:38:02,464 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:38:02,464 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:38:02,464 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:38:02,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:38:02,464 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:38:02,464 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:38:02,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:38:02,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:38:02,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:38:02,703 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:38:02,703 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:38:02,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_15-2.c [2022-01-10 06:38:02,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d91e8f39/b5c3e69dd20c4cc8b710557d38c04c10/FLAGe4d64cea5 [2022-01-10 06:38:03,142 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:38:03,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_15-2.c [2022-01-10 06:38:03,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d91e8f39/b5c3e69dd20c4cc8b710557d38c04c10/FLAGe4d64cea5 [2022-01-10 06:38:03,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d91e8f39/b5c3e69dd20c4cc8b710557d38c04c10 [2022-01-10 06:38:03,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:38:03,171 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:38:03,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:38:03,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:38:03,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:38:03,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:38:03" (1/1) ... [2022-01-10 06:38:03,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19f69ce9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:03, skipping insertion in model container [2022-01-10 06:38:03,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:38:03" (1/1) ... [2022-01-10 06:38:03,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:38:03,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:38:03,347 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_15-2.c[950,963] [2022-01-10 06:38:03,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:38:03,360 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:38:03,372 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_15-2.c[950,963] [2022-01-10 06:38:03,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:38:03,383 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:38:03,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:03 WrapperNode [2022-01-10 06:38:03,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:38:03,384 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:38:03,384 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:38:03,384 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:38:03,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:03" (1/1) ... [2022-01-10 06:38:03,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:03" (1/1) ... [2022-01-10 06:38:03,419 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 06:38:03,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:38:03,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:38:03,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:38:03,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:38:03,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:03" (1/1) ... [2022-01-10 06:38:03,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:03" (1/1) ... [2022-01-10 06:38:03,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:03" (1/1) ... [2022-01-10 06:38:03,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:03" (1/1) ... [2022-01-10 06:38:03,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:03" (1/1) ... [2022-01-10 06:38:03,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:03" (1/1) ... [2022-01-10 06:38:03,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:03" (1/1) ... [2022-01-10 06:38:03,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:38:03,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:38:03,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:38:03,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:38:03,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:03" (1/1) ... [2022-01-10 06:38:03,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:38:03,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:38:03,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 06:38:03,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 06:38:03,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:38:03,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:38:03,537 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-01-10 06:38:03,537 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-01-10 06:38:03,537 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-01-10 06:38:03,537 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-01-10 06:38:03,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:38:03,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:38:03,594 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:38:03,596 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:38:03,692 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:38:03,697 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:38:03,697 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 06:38:03,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:38:03 BoogieIcfgContainer [2022-01-10 06:38:03,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:38:03,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:38:03,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:38:03,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:38:03,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:38:03" (1/3) ... [2022-01-10 06:38:03,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1b9ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:38:03, skipping insertion in model container [2022-01-10 06:38:03,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:03" (2/3) ... [2022-01-10 06:38:03,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1b9ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:38:03, skipping insertion in model container [2022-01-10 06:38:03,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:38:03" (3/3) ... [2022-01-10 06:38:03,706 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_15-2.c [2022-01-10 06:38:03,711 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:38:03,711 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:38:03,750 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:38:03,757 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 06:38:03,757 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:38:03,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:38:03,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 06:38:03,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:03,778 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:03,778 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:03,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:03,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1014607960, now seen corresponding path program 1 times [2022-01-10 06:38:03,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:03,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481448999] [2022-01-10 06:38:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:03,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:03,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:03,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:03,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:38:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:03,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:38:03,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:38:03,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:38:04,000 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:04,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481448999] [2022-01-10 06:38:04,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481448999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:38:04,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:38:04,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:38:04,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261204746] [2022-01-10 06:38:04,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:38:04,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:38:04,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:04,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:38:04,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:38:04,028 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:38:04,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:04,094 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-01-10 06:38:04,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:38:04,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 06:38:04,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:04,102 INFO L225 Difference]: With dead ends: 37 [2022-01-10 06:38:04,102 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 06:38:04,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:38:04,107 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:04,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 82 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:38:04,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 06:38:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-10 06:38:04,140 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), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 06:38:04,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 06:38:04,142 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 10 [2022-01-10 06:38:04,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:04,142 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 06:38:04,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:38:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 06:38:04,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 06:38:04,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:04,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:04,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 06:38:04,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:04,345 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:04,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:04,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2131805067, now seen corresponding path program 1 times [2022-01-10 06:38:04,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:04,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249759363] [2022-01-10 06:38:04,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:04,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:04,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:04,348 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:04,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:38:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:04,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:38:04,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:38:04,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:38:04,440 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:04,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249759363] [2022-01-10 06:38:04,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249759363] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:38:04,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:38:04,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:38:04,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927598193] [2022-01-10 06:38:04,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:38:04,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:38:04,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:04,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:38:04,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:38:04,443 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:38:04,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:04,512 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-01-10 06:38:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:38:04,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-10 06:38:04,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:04,514 INFO L225 Difference]: With dead ends: 31 [2022-01-10 06:38:04,514 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 06:38:04,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:38:04,516 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:04,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:04,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 06:38:04,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-10 06:38:04,523 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), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 06:38:04,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 06:38:04,524 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 11 [2022-01-10 06:38:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:04,524 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 06:38:04,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:38:04,524 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 06:38:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 06:38:04,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:04,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:04,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:04,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:04,735 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:04,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1494555912, now seen corresponding path program 1 times [2022-01-10 06:38:04,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:04,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085933178] [2022-01-10 06:38:04,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:04,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:04,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:04,737 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:04,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:38:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:04,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:38:04,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:38:04,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:38:05,253 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:05,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085933178] [2022-01-10 06:38:05,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085933178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:05,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:05,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-10 06:38:05,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540170558] [2022-01-10 06:38:05,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:05,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 06:38:05,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:05,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 06:38:05,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:38:05,262 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:38:05,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:05,442 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-01-10 06:38:05,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:38:05,443 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 22 [2022-01-10 06:38:05,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:05,445 INFO L225 Difference]: With dead ends: 37 [2022-01-10 06:38:05,445 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 06:38:05,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:38:05,446 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:05,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 96 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:05,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 06:38:05,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-01-10 06:38:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-10 06:38:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-01-10 06:38:05,454 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 22 [2022-01-10 06:38:05,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:05,455 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-01-10 06:38:05,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:38:05,455 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-01-10 06:38:05,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 06:38:05,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:05,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:05,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:05,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:05,666 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:05,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:05,667 INFO L85 PathProgramCache]: Analyzing trace with hash 814571350, now seen corresponding path program 1 times [2022-01-10 06:38:05,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:05,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408631825] [2022-01-10 06:38:05,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:05,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:05,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:05,669 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:05,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:38:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:05,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:38:05,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:38:05,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:38:05,989 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:05,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408631825] [2022-01-10 06:38:05,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408631825] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:05,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:05,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-10 06:38:05,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895865787] [2022-01-10 06:38:05,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:05,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 06:38:05,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:05,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 06:38:05,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:38:05,997 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:38:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:06,140 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2022-01-10 06:38:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:38:06,141 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 23 [2022-01-10 06:38:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:06,143 INFO L225 Difference]: With dead ends: 61 [2022-01-10 06:38:06,143 INFO L226 Difference]: Without dead ends: 35 [2022-01-10 06:38:06,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:38:06,144 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:06,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 115 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:06,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-10 06:38:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-01-10 06:38:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-01-10 06:38:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2022-01-10 06:38:06,153 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 23 [2022-01-10 06:38:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:06,154 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2022-01-10 06:38:06,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:38:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2022-01-10 06:38:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 06:38:06,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:06,156 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:06,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:06,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:06,365 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:06,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:06,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1581983960, now seen corresponding path program 1 times [2022-01-10 06:38:06,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:06,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256611916] [2022-01-10 06:38:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:06,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:06,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:06,367 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:06,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:38:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:06,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:38:06,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:38:06,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:38:07,000 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:07,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256611916] [2022-01-10 06:38:07,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256611916] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:07,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:07,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2022-01-10 06:38:07,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946743173] [2022-01-10 06:38:07,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:07,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:38:07,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:38:07,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:38:07,002 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 06:38:07,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:07,245 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2022-01-10 06:38:07,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:38:07,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) Word has length 34 [2022-01-10 06:38:07,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:07,247 INFO L225 Difference]: With dead ends: 49 [2022-01-10 06:38:07,247 INFO L226 Difference]: Without dead ends: 45 [2022-01-10 06:38:07,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:38:07,249 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:07,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 153 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:07,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-10 06:38:07,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-01-10 06:38:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (21), 10 states have call predecessors, (21), 8 states have call successors, (21) [2022-01-10 06:38:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 54 transitions. [2022-01-10 06:38:07,262 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 54 transitions. Word has length 34 [2022-01-10 06:38:07,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:07,262 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 54 transitions. [2022-01-10 06:38:07,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 06:38:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 54 transitions. [2022-01-10 06:38:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 06:38:07,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:07,264 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:07,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:07,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:07,473 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:07,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:07,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1656487097, now seen corresponding path program 1 times [2022-01-10 06:38:07,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:07,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112822714] [2022-01-10 06:38:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:07,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:07,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:07,476 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:07,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:38:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:07,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:38:07,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:38:07,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:38:07,902 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:07,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112822714] [2022-01-10 06:38:07,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112822714] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:07,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:07,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2022-01-10 06:38:07,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224457830] [2022-01-10 06:38:07,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:07,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:38:07,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:07,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:38:07,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:38:07,905 INFO L87 Difference]: Start difference. First operand 36 states and 54 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 06:38:08,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:08,087 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2022-01-10 06:38:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:38:08,088 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) Word has length 35 [2022-01-10 06:38:08,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:08,089 INFO L225 Difference]: With dead ends: 79 [2022-01-10 06:38:08,090 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 06:38:08,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:38:08,091 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:08,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 152 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:08,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 06:38:08,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-10 06:38:08,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 29 states have internal predecessors, (30), 10 states have call successors, (10), 2 states have call predecessors, (10), 9 states have return successors, (37), 14 states have call predecessors, (37), 10 states have call successors, (37) [2022-01-10 06:38:08,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2022-01-10 06:38:08,102 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 35 [2022-01-10 06:38:08,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:08,102 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2022-01-10 06:38:08,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 06:38:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2022-01-10 06:38:08,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 06:38:08,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:08,105 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:08,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:08,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:08,314 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:08,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:08,315 INFO L85 PathProgramCache]: Analyzing trace with hash 600804856, now seen corresponding path program 2 times [2022-01-10 06:38:08,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:08,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125050448] [2022-01-10 06:38:08,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:08,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:08,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:08,336 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:08,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:38:08,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:08,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:08,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:38:08,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 06:38:08,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:38:09,176 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:09,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125050448] [2022-01-10 06:38:09,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125050448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:09,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:09,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2022-01-10 06:38:09,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047754680] [2022-01-10 06:38:09,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:09,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:38:09,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:09,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:38:09,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:38:09,178 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 14 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-10 06:38:09,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:09,559 INFO L93 Difference]: Finished difference Result 70 states and 142 transitions. [2022-01-10 06:38:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:38:09,560 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 14 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) Word has length 46 [2022-01-10 06:38:09,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:09,562 INFO L225 Difference]: With dead ends: 70 [2022-01-10 06:38:09,562 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 06:38:09,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:38:09,565 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:09,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 156 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:38:09,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 06:38:09,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2022-01-10 06:38:09,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 11 states have call successors, (11), 2 states have call predecessors, (11), 10 states have return successors, (47), 16 states have call predecessors, (47), 11 states have call successors, (47) [2022-01-10 06:38:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 90 transitions. [2022-01-10 06:38:09,583 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 90 transitions. Word has length 46 [2022-01-10 06:38:09,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:09,583 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 90 transitions. [2022-01-10 06:38:09,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 14 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-10 06:38:09,583 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 90 transitions. [2022-01-10 06:38:09,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 06:38:09,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:09,586 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:09,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:09,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:09,796 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:09,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1482129412, now seen corresponding path program 1 times [2022-01-10 06:38:09,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:09,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801785593] [2022-01-10 06:38:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:09,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:09,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:09,798 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:09,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:38:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:09,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:38:09,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 06:38:09,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:38:10,401 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:10,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801785593] [2022-01-10 06:38:10,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801785593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:10,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:10,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2022-01-10 06:38:10,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689965390] [2022-01-10 06:38:10,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:10,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:38:10,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:10,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:38:10,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:38:10,402 INFO L87 Difference]: Start difference. First operand 50 states and 90 transitions. Second operand has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-10 06:38:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:10,635 INFO L93 Difference]: Finished difference Result 108 states and 252 transitions. [2022-01-10 06:38:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:38:10,636 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) Word has length 47 [2022-01-10 06:38:10,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:10,637 INFO L225 Difference]: With dead ends: 108 [2022-01-10 06:38:10,637 INFO L226 Difference]: Without dead ends: 61 [2022-01-10 06:38:10,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:38:10,640 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:10,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 208 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-10 06:38:10,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-01-10 06:38:10,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 13 states have call successors, (13), 2 states have call predecessors, (13), 13 states have return successors, (69), 21 states have call predecessors, (69), 13 states have call successors, (69) [2022-01-10 06:38:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 120 transitions. [2022-01-10 06:38:10,658 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 120 transitions. Word has length 47 [2022-01-10 06:38:10,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:10,658 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 120 transitions. [2022-01-10 06:38:10,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-10 06:38:10,658 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 120 transitions. [2022-01-10 06:38:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-10 06:38:10,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:10,663 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:10,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-01-10 06:38:10,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:10,887 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:10,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:10,888 INFO L85 PathProgramCache]: Analyzing trace with hash -425933224, now seen corresponding path program 3 times [2022-01-10 06:38:10,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:10,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086747480] [2022-01-10 06:38:10,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:38:10,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:10,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:10,890 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:10,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:38:10,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 06:38:10,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:38:10,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-10 06:38:11,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-10 06:38:11,355 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:11,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086747480] [2022-01-10 06:38:11,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086747480] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:11,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:11,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-10 06:38:11,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749619386] [2022-01-10 06:38:11,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:11,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 06:38:11,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:11,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 06:38:11,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:38:11,357 INFO L87 Difference]: Start difference. First operand 61 states and 120 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-10 06:38:11,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:11,495 INFO L93 Difference]: Finished difference Result 83 states and 163 transitions. [2022-01-10 06:38:11,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:38:11,495 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 58 [2022-01-10 06:38:11,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:11,497 INFO L225 Difference]: With dead ends: 83 [2022-01-10 06:38:11,497 INFO L226 Difference]: Without dead ends: 79 [2022-01-10 06:38:11,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:38:11,498 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:11,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 100 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:11,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-10 06:38:11,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2022-01-10 06:38:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 13 states have call successors, (13), 2 states have call predecessors, (13), 13 states have return successors, (69), 21 states have call predecessors, (69), 13 states have call successors, (69) [2022-01-10 06:38:11,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 120 transitions. [2022-01-10 06:38:11,513 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 120 transitions. Word has length 58 [2022-01-10 06:38:11,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:11,513 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 120 transitions. [2022-01-10 06:38:11,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-10 06:38:11,513 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 120 transitions. [2022-01-10 06:38:11,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 06:38:11,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:11,515 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:11,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:11,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:11,724 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:11,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:11,724 INFO L85 PathProgramCache]: Analyzing trace with hash -354787678, now seen corresponding path program 2 times [2022-01-10 06:38:11,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:11,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330934084] [2022-01-10 06:38:11,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:11,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:11,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:11,726 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:11,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:38:11,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:11,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:11,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:38:11,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 06:38:12,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 06:38:12,893 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:12,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330934084] [2022-01-10 06:38:12,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330934084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:12,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:12,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2022-01-10 06:38:12,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228123003] [2022-01-10 06:38:12,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:12,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:38:12,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:12,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:38:12,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:38:12,895 INFO L87 Difference]: Start difference. First operand 61 states and 120 transitions. Second operand has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 5 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-10 06:38:13,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:13,592 INFO L93 Difference]: Finished difference Result 163 states and 460 transitions. [2022-01-10 06:38:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:38:13,596 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 5 states have call predecessors, (14), 12 states have call successors, (14) Word has length 59 [2022-01-10 06:38:13,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:13,598 INFO L225 Difference]: With dead ends: 163 [2022-01-10 06:38:13,598 INFO L226 Difference]: Without dead ends: 105 [2022-01-10 06:38:13,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:38:13,600 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:13,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 181 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:38:13,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-10 06:38:13,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2022-01-10 06:38:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 60 states have internal predecessors, (62), 20 states have call successors, (20), 5 states have call predecessors, (20), 22 states have return successors, (150), 33 states have call predecessors, (150), 20 states have call successors, (150) [2022-01-10 06:38:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 232 transitions. [2022-01-10 06:38:13,637 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 232 transitions. Word has length 59 [2022-01-10 06:38:13,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:13,638 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 232 transitions. [2022-01-10 06:38:13,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 5 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-10 06:38:13,638 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 232 transitions. [2022-01-10 06:38:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 06:38:13,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:13,641 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:13,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:13,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:13,850 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:13,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:13,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1748552912, now seen corresponding path program 2 times [2022-01-10 06:38:13,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:13,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23396975] [2022-01-10 06:38:13,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:13,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:13,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:13,852 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:13,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:38:13,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:13,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:13,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:38:13,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 59 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-10 06:38:14,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 69 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-10 06:38:14,626 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:14,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23396975] [2022-01-10 06:38:14,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23396975] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:14,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:14,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2022-01-10 06:38:14,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429435874] [2022-01-10 06:38:14,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:14,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:38:14,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:14,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:38:14,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:38:14,628 INFO L87 Difference]: Start difference. First operand 99 states and 232 transitions. Second operand has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 16 states have internal predecessors, (48), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 6 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 06:38:14,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:14,873 INFO L93 Difference]: Finished difference Result 209 states and 648 transitions. [2022-01-10 06:38:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:38:14,874 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 16 states have internal predecessors, (48), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 6 states have call predecessors, (16), 13 states have call successors, (16) Word has length 72 [2022-01-10 06:38:14,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:14,878 INFO L225 Difference]: With dead ends: 209 [2022-01-10 06:38:14,878 INFO L226 Difference]: Without dead ends: 113 [2022-01-10 06:38:14,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:38:14,880 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:14,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 194 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-10 06:38:14,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2022-01-10 06:38:14,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 62 states have (on average 1.096774193548387) internal successors, (68), 66 states have internal predecessors, (68), 22 states have call successors, (22), 5 states have call predecessors, (22), 25 states have return successors, (186), 38 states have call predecessors, (186), 22 states have call successors, (186) [2022-01-10 06:38:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 276 transitions. [2022-01-10 06:38:14,899 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 276 transitions. Word has length 72 [2022-01-10 06:38:14,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:14,899 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 276 transitions. [2022-01-10 06:38:14,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 16 states have internal predecessors, (48), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 6 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 06:38:14,899 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 276 transitions. [2022-01-10 06:38:14,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-10 06:38:14,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:14,902 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:14,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:15,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:15,111 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:15,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:15,111 INFO L85 PathProgramCache]: Analyzing trace with hash -971041873, now seen corresponding path program 3 times [2022-01-10 06:38:15,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:15,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947867696] [2022-01-10 06:38:15,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:38:15,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:15,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:15,113 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:15,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:38:15,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 06:38:15,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:15,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:38:15,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 229 proven. 5 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-01-10 06:38:15,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 169 proven. 19 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-01-10 06:38:16,256 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:16,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947867696] [2022-01-10 06:38:16,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947867696] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:16,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:16,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-01-10 06:38:16,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874098979] [2022-01-10 06:38:16,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:16,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:38:16,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:16,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:38:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:38:16,258 INFO L87 Difference]: Start difference. First operand 110 states and 276 transitions. Second operand has 14 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 8 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) [2022-01-10 06:38:16,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:16,506 INFO L93 Difference]: Finished difference Result 223 states and 708 transitions. [2022-01-10 06:38:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:38:16,507 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 8 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) Word has length 131 [2022-01-10 06:38:16,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:16,509 INFO L225 Difference]: With dead ends: 223 [2022-01-10 06:38:16,509 INFO L226 Difference]: Without dead ends: 116 [2022-01-10 06:38:16,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:38:16,511 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:16,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 150 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:16,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-10 06:38:16,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-01-10 06:38:16,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 70 states have internal predecessors, (72), 22 states have call successors, (22), 5 states have call predecessors, (22), 27 states have return successors, (179), 40 states have call predecessors, (179), 22 states have call successors, (179) [2022-01-10 06:38:16,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 273 transitions. [2022-01-10 06:38:16,526 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 273 transitions. Word has length 131 [2022-01-10 06:38:16,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:16,526 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 273 transitions. [2022-01-10 06:38:16,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 8 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) [2022-01-10 06:38:16,527 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 273 transitions. [2022-01-10 06:38:16,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-10 06:38:16,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:16,529 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:16,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:16,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:16,738 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:16,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:16,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1871760231, now seen corresponding path program 1 times [2022-01-10 06:38:16,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:16,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844325768] [2022-01-10 06:38:16,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:16,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:16,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:16,740 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:16,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:38:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:16,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:38:16,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-10 06:38:17,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 21 proven. 147 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-01-10 06:38:18,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:18,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844325768] [2022-01-10 06:38:18,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844325768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:18,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:18,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2022-01-10 06:38:18,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533041929] [2022-01-10 06:38:18,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:18,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:38:18,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:18,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:38:18,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:38:18,219 INFO L87 Difference]: Start difference. First operand 116 states and 273 transitions. Second operand has 18 states, 16 states have (on average 3.4375) internal successors, (55), 18 states have internal predecessors, (55), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) [2022-01-10 06:38:19,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:19,314 INFO L93 Difference]: Finished difference Result 324 states and 1037 transitions. [2022-01-10 06:38:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 06:38:19,314 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.4375) internal successors, (55), 18 states have internal predecessors, (55), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) Word has length 109 [2022-01-10 06:38:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:19,319 INFO L225 Difference]: With dead ends: 324 [2022-01-10 06:38:19,319 INFO L226 Difference]: Without dead ends: 209 [2022-01-10 06:38:19,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 06:38:19,322 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:19,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 240 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 06:38:19,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-10 06:38:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 194. [2022-01-10 06:38:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 114 states have (on average 1.105263157894737) internal successors, (126), 118 states have internal predecessors, (126), 35 states have call successors, (35), 13 states have call predecessors, (35), 44 states have return successors, (328), 62 states have call predecessors, (328), 35 states have call successors, (328) [2022-01-10 06:38:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 489 transitions. [2022-01-10 06:38:19,347 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 489 transitions. Word has length 109 [2022-01-10 06:38:19,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:19,347 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 489 transitions. [2022-01-10 06:38:19,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.4375) internal successors, (55), 18 states have internal predecessors, (55), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) [2022-01-10 06:38:19,347 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 489 transitions. [2022-01-10 06:38:19,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 06:38:19,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:19,351 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:19,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:19,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:19,560 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:19,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:19,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1266739771, now seen corresponding path program 2 times [2022-01-10 06:38:19,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:19,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974300138] [2022-01-10 06:38:19,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:19,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:19,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:19,562 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:19,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:38:19,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:19,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:19,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:38:19,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 51 proven. 191 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2022-01-10 06:38:19,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 51 proven. 207 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-01-10 06:38:20,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:20,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974300138] [2022-01-10 06:38:20,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974300138] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:20,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:20,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2022-01-10 06:38:20,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395097072] [2022-01-10 06:38:20,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:20,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:38:20,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:20,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:38:20,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:38:20,766 INFO L87 Difference]: Start difference. First operand 194 states and 489 transitions. Second operand has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) [2022-01-10 06:38:21,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:21,069 INFO L93 Difference]: Finished difference Result 406 states and 1364 transitions. [2022-01-10 06:38:21,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:38:21,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) Word has length 145 [2022-01-10 06:38:21,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:21,080 INFO L225 Difference]: With dead ends: 406 [2022-01-10 06:38:21,080 INFO L226 Difference]: Without dead ends: 215 [2022-01-10 06:38:21,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 270 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:38:21,084 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:21,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 270 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:21,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-10 06:38:21,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-01-10 06:38:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 130 states have internal predecessors, (138), 38 states have call successors, (38), 13 states have call predecessors, (38), 50 states have return successors, (417), 71 states have call predecessors, (417), 38 states have call successors, (417) [2022-01-10 06:38:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 593 transitions. [2022-01-10 06:38:21,112 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 593 transitions. Word has length 145 [2022-01-10 06:38:21,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:21,112 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 593 transitions. [2022-01-10 06:38:21,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) [2022-01-10 06:38:21,112 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 593 transitions. [2022-01-10 06:38:21,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-01-10 06:38:21,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:21,120 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 22, 22, 20, 15, 14, 14, 14, 14, 14, 14, 14, 11, 11, 11, 11, 11, 11, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:21,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:21,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:21,329 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:21,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:21,330 INFO L85 PathProgramCache]: Analyzing trace with hash -769042422, now seen corresponding path program 3 times [2022-01-10 06:38:21,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:21,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972699875] [2022-01-10 06:38:21,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:38:21,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:21,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:21,332 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:21,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:38:21,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 06:38:21,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:21,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:38:21,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 411 proven. 2 refuted. 0 times theorem prover too weak. 2868 trivial. 0 not checked. [2022-01-10 06:38:21,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 413 proven. 1 refuted. 0 times theorem prover too weak. 2867 trivial. 0 not checked. [2022-01-10 06:38:22,941 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:22,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972699875] [2022-01-10 06:38:22,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972699875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:22,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:22,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-10 06:38:22,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728166520] [2022-01-10 06:38:22,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:22,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:38:22,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:22,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:38:22,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:38:22,945 INFO L87 Difference]: Start difference. First operand 215 states and 593 transitions. Second operand has 11 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:38:23,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:23,150 INFO L93 Difference]: Finished difference Result 543 states and 2182 transitions. [2022-01-10 06:38:23,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:38:23,151 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 320 [2022-01-10 06:38:23,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:23,157 INFO L225 Difference]: With dead ends: 543 [2022-01-10 06:38:23,157 INFO L226 Difference]: Without dead ends: 331 [2022-01-10 06:38:23,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:38:23,164 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:23,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 181 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:23,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-01-10 06:38:23,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 225. [2022-01-10 06:38:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 127 states have (on average 1.125984251968504) internal successors, (143), 130 states have internal predecessors, (143), 50 states have call successors, (50), 15 states have call predecessors, (50), 47 states have return successors, (443), 79 states have call predecessors, (443), 50 states have call successors, (443) [2022-01-10 06:38:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 636 transitions. [2022-01-10 06:38:23,209 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 636 transitions. Word has length 320 [2022-01-10 06:38:23,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:23,210 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 636 transitions. [2022-01-10 06:38:23,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:38:23,210 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 636 transitions. [2022-01-10 06:38:23,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-01-10 06:38:23,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:23,217 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 20, 19, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:23,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:23,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:23,426 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:23,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:23,426 INFO L85 PathProgramCache]: Analyzing trace with hash 279871242, now seen corresponding path program 4 times [2022-01-10 06:38:23,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:23,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417925651] [2022-01-10 06:38:23,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:38:23,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:23,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:23,428 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:23,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:38:23,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:38:23,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:23,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:38:23,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 74 proven. 805 refuted. 0 times theorem prover too weak. 3434 trivial. 0 not checked. [2022-01-10 06:38:24,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 74 proven. 826 refuted. 0 times theorem prover too weak. 3413 trivial. 0 not checked. [2022-01-10 06:38:26,378 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:26,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417925651] [2022-01-10 06:38:26,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417925651] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:26,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:26,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2022-01-10 06:38:26,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137252354] [2022-01-10 06:38:26,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:26,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:38:26,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:26,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:38:26,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:38:26,380 INFO L87 Difference]: Start difference. First operand 225 states and 636 transitions. Second operand has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2022-01-10 06:38:27,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:27,890 INFO L93 Difference]: Finished difference Result 683 states and 3001 transitions. [2022-01-10 06:38:27,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-10 06:38:27,891 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) Word has length 368 [2022-01-10 06:38:27,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:27,901 INFO L225 Difference]: With dead ends: 683 [2022-01-10 06:38:27,902 INFO L226 Difference]: Without dead ends: 461 [2022-01-10 06:38:27,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2022-01-10 06:38:27,909 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:27,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 253 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 06:38:27,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-10 06:38:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 420. [2022-01-10 06:38:27,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 238 states have (on average 1.1218487394957983) internal successors, (267), 243 states have internal predecessors, (267), 88 states have call successors, (88), 26 states have call predecessors, (88), 93 states have return successors, (1202), 150 states have call predecessors, (1202), 88 states have call successors, (1202) [2022-01-10 06:38:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1557 transitions. [2022-01-10 06:38:27,981 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1557 transitions. Word has length 368 [2022-01-10 06:38:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:27,981 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1557 transitions. [2022-01-10 06:38:27,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2022-01-10 06:38:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1557 transitions. [2022-01-10 06:38:27,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-01-10 06:38:27,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:27,995 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 18, 17, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 10, 10, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:28,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:28,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:28,208 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:28,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:28,208 INFO L85 PathProgramCache]: Analyzing trace with hash 412199969, now seen corresponding path program 5 times [2022-01-10 06:38:28,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:28,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717941399] [2022-01-10 06:38:28,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:38:28,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:28,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:28,210 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:28,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:38:28,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-10 06:38:28,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:28,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:38:28,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3712 backedges. 1047 proven. 6 refuted. 0 times theorem prover too weak. 2659 trivial. 0 not checked. [2022-01-10 06:38:28,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3712 backedges. 200 proven. 497 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-01-10 06:38:30,061 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:30,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717941399] [2022-01-10 06:38:30,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717941399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:30,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:30,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-10 06:38:30,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045136172] [2022-01-10 06:38:30,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:30,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:38:30,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:30,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:38:30,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:38:30,063 INFO L87 Difference]: Start difference. First operand 420 states and 1557 transitions. Second operand has 12 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2022-01-10 06:38:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:30,220 INFO L93 Difference]: Finished difference Result 832 states and 4034 transitions. [2022-01-10 06:38:30,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:38:30,220 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) Word has length 342 [2022-01-10 06:38:30,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:30,229 INFO L225 Difference]: With dead ends: 832 [2022-01-10 06:38:30,229 INFO L226 Difference]: Without dead ends: 415 [2022-01-10 06:38:30,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 672 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:38:30,238 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:30,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 106 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:30,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-01-10 06:38:30,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 407. [2022-01-10 06:38:30,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 230 states have (on average 1.126086956521739) internal successors, (259), 235 states have internal predecessors, (259), 87 states have call successors, (87), 26 states have call predecessors, (87), 89 states have return successors, (1121), 145 states have call predecessors, (1121), 87 states have call successors, (1121) [2022-01-10 06:38:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1467 transitions. [2022-01-10 06:38:30,304 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1467 transitions. Word has length 342 [2022-01-10 06:38:30,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:30,304 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1467 transitions. [2022-01-10 06:38:30,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2022-01-10 06:38:30,305 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1467 transitions. [2022-01-10 06:38:30,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-10 06:38:30,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:30,316 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 17, 16, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 12, 12, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:30,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-01-10 06:38:30,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:30,544 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:30,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:30,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1157691215, now seen corresponding path program 6 times [2022-01-10 06:38:30,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:30,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333450678] [2022-01-10 06:38:30,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:38:30,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:30,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:30,569 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:30,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 06:38:30,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-10 06:38:30,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:30,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:38:30,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3938 backedges. 1426 proven. 5 refuted. 0 times theorem prover too weak. 2507 trivial. 0 not checked. [2022-01-10 06:38:31,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3938 backedges. 290 proven. 445 refuted. 0 times theorem prover too weak. 3203 trivial. 0 not checked. [2022-01-10 06:38:33,083 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:33,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333450678] [2022-01-10 06:38:33,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333450678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:33,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:33,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-01-10 06:38:33,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691287256] [2022-01-10 06:38:33,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:33,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:38:33,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:33,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:38:33,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:38:33,085 INFO L87 Difference]: Start difference. First operand 407 states and 1467 transitions. Second operand has 20 states, 14 states have (on average 4.142857142857143) internal successors, (58), 18 states have internal predecessors, (58), 9 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-01-10 06:38:33,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:33,478 INFO L93 Difference]: Finished difference Result 546 states and 2010 transitions. [2022-01-10 06:38:33,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:38:33,479 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 4.142857142857143) internal successors, (58), 18 states have internal predecessors, (58), 9 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) Word has length 351 [2022-01-10 06:38:33,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:33,481 INFO L225 Difference]: With dead ends: 546 [2022-01-10 06:38:33,481 INFO L226 Difference]: Without dead ends: 104 [2022-01-10 06:38:33,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:38:33,488 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:33,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 195 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:38:33,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-10 06:38:33,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 88. [2022-01-10 06:38:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 16 states have call successors, (16), 7 states have call predecessors, (16), 17 states have return successors, (60), 26 states have call predecessors, (60), 16 states have call successors, (60) [2022-01-10 06:38:33,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 133 transitions. [2022-01-10 06:38:33,499 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 133 transitions. Word has length 351 [2022-01-10 06:38:33,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:33,500 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 133 transitions. [2022-01-10 06:38:33,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 4.142857142857143) internal successors, (58), 18 states have internal predecessors, (58), 9 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-01-10 06:38:33,500 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 133 transitions. [2022-01-10 06:38:33,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-10 06:38:33,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:33,501 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 19, 19, 17, 16, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 8, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:33,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:33,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:33,710 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:33,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:33,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1760624837, now seen corresponding path program 7 times [2022-01-10 06:38:33,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:33,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411942124] [2022-01-10 06:38:33,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:38:33,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:33,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:33,713 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:33,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 06:38:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:33,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:38:33,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2137 backedges. 96 proven. 501 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2022-01-10 06:38:34,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2137 backedges. 96 proven. 525 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2022-01-10 06:38:35,529 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:35,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411942124] [2022-01-10 06:38:35,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411942124] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:35,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:35,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2022-01-10 06:38:35,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777327804] [2022-01-10 06:38:35,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:35,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:38:35,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:35,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:38:35,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:38:35,531 INFO L87 Difference]: Start difference. First operand 88 states and 133 transitions. Second operand has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 20 states have internal predecessors, (61), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2022-01-10 06:38:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:35,828 INFO L93 Difference]: Finished difference Result 188 states and 363 transitions. [2022-01-10 06:38:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:38:35,828 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 20 states have internal predecessors, (61), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) Word has length 263 [2022-01-10 06:38:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:35,829 INFO L225 Difference]: With dead ends: 188 [2022-01-10 06:38:35,830 INFO L226 Difference]: Without dead ends: 103 [2022-01-10 06:38:35,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 505 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-10 06:38:35,831 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 47 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:35,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 323 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:35,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-10 06:38:35,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2022-01-10 06:38:35,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 18 states have call successors, (18), 7 states have call predecessors, (18), 19 states have return successors, (76), 30 states have call predecessors, (76), 18 states have call successors, (76) [2022-01-10 06:38:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 155 transitions. [2022-01-10 06:38:35,839 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 155 transitions. Word has length 263 [2022-01-10 06:38:35,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:35,839 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 155 transitions. [2022-01-10 06:38:35,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 20 states have internal predecessors, (61), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2022-01-10 06:38:35,839 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 155 transitions. [2022-01-10 06:38:35,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-01-10 06:38:35,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:35,842 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 31, 30, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 12, 12, 8, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:35,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-01-10 06:38:36,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:36,053 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:36,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:36,053 INFO L85 PathProgramCache]: Analyzing trace with hash 260497528, now seen corresponding path program 8 times [2022-01-10 06:38:36,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:36,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180132550] [2022-01-10 06:38:36,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:36,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:36,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:36,055 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:36,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:38:36,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:36,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:36,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:38:36,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7348 backedges. 158 proven. 1215 refuted. 0 times theorem prover too weak. 5975 trivial. 0 not checked. [2022-01-10 06:38:36,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7348 backedges. 158 proven. 1248 refuted. 0 times theorem prover too weak. 5942 trivial. 0 not checked. [2022-01-10 06:38:38,812 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:38,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180132550] [2022-01-10 06:38:38,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180132550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:38,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:38,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2022-01-10 06:38:38,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443232973] [2022-01-10 06:38:38,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:38,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 06:38:38,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:38,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 06:38:38,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-01-10 06:38:38,814 INFO L87 Difference]: Start difference. First operand 96 states and 155 transitions. Second operand has 22 states, 20 states have (on average 3.3) internal successors, (66), 22 states have internal predecessors, (66), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2022-01-10 06:38:39,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:39,247 INFO L93 Difference]: Finished difference Result 204 states and 430 transitions. [2022-01-10 06:38:39,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:38:39,248 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.3) internal successors, (66), 22 states have internal predecessors, (66), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) Word has length 478 [2022-01-10 06:38:39,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:39,253 INFO L225 Difference]: With dead ends: 204 [2022-01-10 06:38:39,253 INFO L226 Difference]: Without dead ends: 111 [2022-01-10 06:38:39,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 931 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:38:39,255 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:39,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 470 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:38:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-10 06:38:39,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2022-01-10 06:38:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 20 states have call successors, (20), 7 states have call predecessors, (20), 21 states have return successors, (96), 34 states have call predecessors, (96), 20 states have call successors, (96) [2022-01-10 06:38:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 181 transitions. [2022-01-10 06:38:39,275 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 181 transitions. Word has length 478 [2022-01-10 06:38:39,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:39,277 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 181 transitions. [2022-01-10 06:38:39,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.3) internal successors, (66), 22 states have internal predecessors, (66), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2022-01-10 06:38:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 181 transitions. [2022-01-10 06:38:39,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 707 [2022-01-10 06:38:39,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:39,301 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 47, 44, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 19, 17, 12, 8, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:39,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:39,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:39,515 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:39,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:39,516 INFO L85 PathProgramCache]: Analyzing trace with hash -71261681, now seen corresponding path program 9 times [2022-01-10 06:38:39,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:39,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500809169] [2022-01-10 06:38:39,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:38:39,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:39,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:39,517 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:39,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:38:39,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-10 06:38:39,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:39,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:38:39,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16314 backedges. 1872 proven. 54 refuted. 0 times theorem prover too weak. 14388 trivial. 0 not checked. [2022-01-10 06:38:40,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16314 backedges. 1621 proven. 69 refuted. 0 times theorem prover too weak. 14624 trivial. 0 not checked. [2022-01-10 06:38:42,968 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:42,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500809169] [2022-01-10 06:38:42,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500809169] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:42,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:42,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 17 [2022-01-10 06:38:42,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216605049] [2022-01-10 06:38:42,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:42,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 06:38:42,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:42,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 06:38:42,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:38:42,970 INFO L87 Difference]: Start difference. First operand 104 states and 181 transitions. Second operand has 17 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 10 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (23), 11 states have call predecessors, (23), 10 states have call successors, (23) [2022-01-10 06:38:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:43,370 INFO L93 Difference]: Finished difference Result 281 states and 800 transitions. [2022-01-10 06:38:43,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:38:43,371 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 10 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (23), 11 states have call predecessors, (23), 10 states have call successors, (23) Word has length 706 [2022-01-10 06:38:43,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:43,374 INFO L225 Difference]: With dead ends: 281 [2022-01-10 06:38:43,374 INFO L226 Difference]: Without dead ends: 180 [2022-01-10 06:38:43,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1418 GetRequests, 1394 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:38:43,376 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:43,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 235 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:38:43,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-10 06:38:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 159. [2022-01-10 06:38:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 33 states have call successors, (33), 8 states have call predecessors, (33), 34 states have return successors, (266), 59 states have call predecessors, (266), 33 states have call successors, (266) [2022-01-10 06:38:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 394 transitions. [2022-01-10 06:38:43,394 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 394 transitions. Word has length 706 [2022-01-10 06:38:43,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:43,395 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 394 transitions. [2022-01-10 06:38:43,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 10 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (23), 11 states have call predecessors, (23), 10 states have call successors, (23) [2022-01-10 06:38:43,395 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 394 transitions. [2022-01-10 06:38:43,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2022-01-10 06:38:43,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:43,399 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 30, 29, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 12, 11, 9, 5, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:43,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:43,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:43,609 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:43,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:43,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1234438695, now seen corresponding path program 10 times [2022-01-10 06:38:43,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:43,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074944949] [2022-01-10 06:38:43,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:38:43,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:43,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:43,611 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:43,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:38:43,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:38:43,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:43,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 06:38:43,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6954 backedges. 194 proven. 1281 refuted. 0 times theorem prover too weak. 5479 trivial. 0 not checked. [2022-01-10 06:38:44,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6954 backedges. 194 proven. 1325 refuted. 0 times theorem prover too weak. 5435 trivial. 0 not checked. [2022-01-10 06:38:46,574 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:46,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074944949] [2022-01-10 06:38:46,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074944949] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:46,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:46,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2022-01-10 06:38:46,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419171700] [2022-01-10 06:38:46,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:46,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 06:38:46,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:46,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 06:38:46,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:38:46,575 INFO L87 Difference]: Start difference. First operand 159 states and 394 transitions. Second operand has 24 states, 22 states have (on average 3.227272727272727) internal successors, (71), 24 states have internal predecessors, (71), 21 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 10 states have call predecessors, (30), 21 states have call successors, (30) [2022-01-10 06:38:47,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:47,060 INFO L93 Difference]: Finished difference Result 335 states and 1199 transitions. [2022-01-10 06:38:47,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:38:47,061 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.227272727272727) internal successors, (71), 24 states have internal predecessors, (71), 21 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 10 states have call predecessors, (30), 21 states have call successors, (30) Word has length 465 [2022-01-10 06:38:47,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:47,064 INFO L225 Difference]: With dead ends: 335 [2022-01-10 06:38:47,064 INFO L226 Difference]: Without dead ends: 179 [2022-01-10 06:38:47,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 937 GetRequests, 905 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 06:38:47,072 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 34 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:47,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 519 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:38:47,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-10 06:38:47,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2022-01-10 06:38:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 37 states have call successors, (37), 8 states have call predecessors, (37), 38 states have return successors, (334), 67 states have call predecessors, (334), 37 states have call successors, (334) [2022-01-10 06:38:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 474 transitions. [2022-01-10 06:38:47,095 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 474 transitions. Word has length 465 [2022-01-10 06:38:47,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:47,096 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 474 transitions. [2022-01-10 06:38:47,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.227272727272727) internal successors, (71), 24 states have internal predecessors, (71), 21 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 10 states have call predecessors, (30), 21 states have call successors, (30) [2022-01-10 06:38:47,096 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 474 transitions. [2022-01-10 06:38:47,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2022-01-10 06:38:47,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:47,126 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 70, 70, 60, 58, 37, 37, 37, 37, 37, 37, 35, 35, 35, 35, 35, 35, 25, 21, 15, 12, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:47,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:47,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:47,338 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash 790259693, now seen corresponding path program 11 times [2022-01-10 06:38:47,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:47,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259877033] [2022-01-10 06:38:47,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:38:47,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:47,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:47,341 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:47,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:38:47,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-10 06:38:47,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:47,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 06:38:47,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 27966 backedges. 10055 proven. 58 refuted. 0 times theorem prover too weak. 17853 trivial. 0 not checked. [2022-01-10 06:38:48,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 27966 backedges. 783 proven. 1770 refuted. 0 times theorem prover too weak. 25413 trivial. 0 not checked. [2022-01-10 06:38:52,005 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:52,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259877033] [2022-01-10 06:38:52,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259877033] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:52,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:52,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2022-01-10 06:38:52,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493253811] [2022-01-10 06:38:52,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:52,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 06:38:52,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:52,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 06:38:52,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:38:52,007 INFO L87 Difference]: Start difference. First operand 175 states and 474 transitions. Second operand has 17 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 10 states have call successors, (22), 2 states have call predecessors, (22), 7 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2022-01-10 06:38:52,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:52,324 INFO L93 Difference]: Finished difference Result 340 states and 1166 transitions. [2022-01-10 06:38:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:38:52,325 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 10 states have call successors, (22), 2 states have call predecessors, (22), 7 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) Word has length 920 [2022-01-10 06:38:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:52,327 INFO L225 Difference]: With dead ends: 340 [2022-01-10 06:38:52,328 INFO L226 Difference]: Without dead ends: 167 [2022-01-10 06:38:52,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1845 GetRequests, 1822 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:38:52,331 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:52,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 163 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:52,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-10 06:38:52,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-01-10 06:38:52,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 35 states have call successors, (35), 8 states have call predecessors, (35), 36 states have return successors, (287), 63 states have call predecessors, (287), 35 states have call successors, (287) [2022-01-10 06:38:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 421 transitions. [2022-01-10 06:38:52,348 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 421 transitions. Word has length 920 [2022-01-10 06:38:52,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:52,349 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 421 transitions. [2022-01-10 06:38:52,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 10 states have call successors, (22), 2 states have call predecessors, (22), 7 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2022-01-10 06:38:52,349 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 421 transitions. [2022-01-10 06:38:52,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2022-01-10 06:38:52,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:52,353 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 24, 24, 24, 22, 16, 16, 16, 16, 16, 16, 12, 12, 12, 12, 12, 12, 12, 9, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:52,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:52,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:52,562 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:52,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:52,563 INFO L85 PathProgramCache]: Analyzing trace with hash 841472114, now seen corresponding path program 12 times [2022-01-10 06:38:52,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:52,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825865848] [2022-01-10 06:38:52,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:38:52,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:52,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:52,565 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:52,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 06:38:52,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-01-10 06:38:52,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:52,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 06:38:52,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4281 backedges. 2154 proven. 101 refuted. 0 times theorem prover too weak. 2026 trivial. 0 not checked. [2022-01-10 06:38:53,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4281 backedges. 304 proven. 769 refuted. 0 times theorem prover too weak. 3208 trivial. 0 not checked. [2022-01-10 06:38:55,123 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:55,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825865848] [2022-01-10 06:38:55,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825865848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:55,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:55,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 20 [2022-01-10 06:38:55,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610769874] [2022-01-10 06:38:55,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:55,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:38:55,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:55,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:38:55,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:38:55,125 INFO L87 Difference]: Start difference. First operand 167 states and 421 transitions. Second operand has 20 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 14 states have call successors, (26), 2 states have call predecessors, (26), 9 states have return successors, (31), 12 states have call predecessors, (31), 14 states have call successors, (31) [2022-01-10 06:38:55,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:55,685 INFO L93 Difference]: Finished difference Result 303 states and 879 transitions. [2022-01-10 06:38:55,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 06:38:55,685 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 14 states have call successors, (26), 2 states have call predecessors, (26), 9 states have return successors, (31), 12 states have call predecessors, (31), 14 states have call successors, (31) Word has length 364 [2022-01-10 06:38:55,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:55,687 INFO L225 Difference]: With dead ends: 303 [2022-01-10 06:38:55,687 INFO L226 Difference]: Without dead ends: 138 [2022-01-10 06:38:55,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 706 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-01-10 06:38:55,690 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 52 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:55,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 238 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:38:55,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-10 06:38:55,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-01-10 06:38:55,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 27 states have call successors, (27), 8 states have call predecessors, (27), 29 states have return successors, (149), 48 states have call predecessors, (149), 27 states have call successors, (149) [2022-01-10 06:38:55,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 260 transitions. [2022-01-10 06:38:55,702 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 260 transitions. Word has length 364 [2022-01-10 06:38:55,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:55,703 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 260 transitions. [2022-01-10 06:38:55,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 14 states have call successors, (26), 2 states have call predecessors, (26), 9 states have return successors, (31), 12 states have call predecessors, (31), 14 states have call successors, (31) [2022-01-10 06:38:55,703 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 260 transitions. [2022-01-10 06:38:55,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2022-01-10 06:38:55,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:55,708 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 55, 55, 47, 44, 29, 29, 29, 29, 29, 29, 27, 27, 27, 27, 27, 27, 20, 15, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:55,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:55,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:55,920 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:55,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:55,920 INFO L85 PathProgramCache]: Analyzing trace with hash 844256167, now seen corresponding path program 13 times [2022-01-10 06:38:55,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:55,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177709413] [2022-01-10 06:38:55,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:38:55,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:55,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:55,922 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:55,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 06:38:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:56,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 06:38:56,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16850 backedges. 431 proven. 2227 refuted. 0 times theorem prover too weak. 14192 trivial. 0 not checked. [2022-01-10 06:38:57,146 INFO L328 TraceCheckSpWp]: Computing backward predicates...