/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/bitvector/s3_clnt_3.BV.c.cil-1a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:40:05,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:40:05,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:40:05,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 02:40:05,654 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 02:40:05,673 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:40:05,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:40:05,674 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:40:05,674 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:40:05,675 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:40:05,675 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:40:05,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:40:05,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:40:05,676 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:40:05,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:40:05,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:40:05,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:40:05,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:40:05,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:40:05,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:40:05,677 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:40:05,677 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:40:05,677 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:40:05,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:40:05,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:40:05,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:40:05,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:40:05,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:40:05,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:40:05,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:40:05,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:40:05,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:40:05,679 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:40:05,679 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:40:05,680 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:40:05,680 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:40:05,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:40:05,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:40:05,680 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:40:05,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:40:05,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:40:05,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:40:05,905 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:40:05,906 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:40:05,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/s3_clnt_3.BV.c.cil-1a.c [2022-01-10 02:40:05,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/915f671c7/c73e9f65917744f085a4ddac7ae725da/FLAG0fdba3356 [2022-01-10 02:40:06,349 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:40:06,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/s3_clnt_3.BV.c.cil-1a.c [2022-01-10 02:40:06,368 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/915f671c7/c73e9f65917744f085a4ddac7ae725da/FLAG0fdba3356 [2022-01-10 02:40:06,383 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/915f671c7/c73e9f65917744f085a4ddac7ae725da [2022-01-10 02:40:06,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:40:06,389 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:40:06,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:40:06,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:40:06,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:40:06,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:40:06" (1/1) ... [2022-01-10 02:40:06,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b0de5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:06, skipping insertion in model container [2022-01-10 02:40:06,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:40:06" (1/1) ... [2022-01-10 02:40:06,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:40:06,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:40:06,634 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/s3_clnt_3.BV.c.cil-1a.c[37883,37896] [2022-01-10 02:40:06,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:40:06,654 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:40:06,696 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/s3_clnt_3.BV.c.cil-1a.c[37883,37896] [2022-01-10 02:40:06,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:40:06,710 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:40:06,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:06 WrapperNode [2022-01-10 02:40:06,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:40:06,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:40:06,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:40:06,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:40:06,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:06" (1/1) ... [2022-01-10 02:40:06,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:06" (1/1) ... [2022-01-10 02:40:06,760 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 440 [2022-01-10 02:40:06,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:40:06,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:40:06,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:40:06,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:40:06,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:06" (1/1) ... [2022-01-10 02:40:06,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:06" (1/1) ... [2022-01-10 02:40:06,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:06" (1/1) ... [2022-01-10 02:40:06,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:06" (1/1) ... [2022-01-10 02:40:06,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:06" (1/1) ... [2022-01-10 02:40:06,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:06" (1/1) ... [2022-01-10 02:40:06,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:06" (1/1) ... [2022-01-10 02:40:06,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:40:06,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:40:06,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:40:06,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:40:06,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:06" (1/1) ... [2022-01-10 02:40:06,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:40:06,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:40:06,840 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 02:40:06,842 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 02:40:06,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:40:06,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:40:06,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:40:06,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:40:06,956 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:40:06,957 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:40:06,987 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-10 02:40:07,390 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##87: assume false; [2022-01-10 02:40:07,390 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##88: assume !false; [2022-01-10 02:40:07,391 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:40:07,402 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:40:07,402 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 02:40:07,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:40:07 BoogieIcfgContainer [2022-01-10 02:40:07,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:40:07,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:40:07,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:40:07,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:40:07,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:40:06" (1/3) ... [2022-01-10 02:40:07,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abcbd91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:40:07, skipping insertion in model container [2022-01-10 02:40:07,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:06" (2/3) ... [2022-01-10 02:40:07,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abcbd91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:40:07, skipping insertion in model container [2022-01-10 02:40:07,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:40:07" (3/3) ... [2022-01-10 02:40:07,412 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_3.BV.c.cil-1a.c [2022-01-10 02:40:07,416 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:40:07,416 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:40:07,455 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:40:07,459 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 02:40:07,460 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:40:07,472 INFO L276 IsEmpty]: Start isEmpty. Operand has 126 states, 124 states have (on average 1.7338709677419355) internal successors, (215), 125 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:07,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 02:40:07,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:07,478 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:07,478 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:07,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:07,482 INFO L85 PathProgramCache]: Analyzing trace with hash 259999105, now seen corresponding path program 1 times [2022-01-10 02:40:07,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:07,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409615585] [2022-01-10 02:40:07,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:07,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:07,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:07,496 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 02:40:07,500 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 02:40:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:07,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:07,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:07,658 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 02:40:07,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:07,659 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:07,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409615585] [2022-01-10 02:40:07,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409615585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:07,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:07,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:07,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751806357] [2022-01-10 02:40:07,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:07,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:07,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:07,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:07,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:07,695 INFO L87 Difference]: Start difference. First operand has 126 states, 124 states have (on average 1.7338709677419355) internal successors, (215), 125 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:07,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:07,853 INFO L93 Difference]: Finished difference Result 247 states and 423 transitions. [2022-01-10 02:40:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:07,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-10 02:40:07,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:07,868 INFO L225 Difference]: With dead ends: 247 [2022-01-10 02:40:07,868 INFO L226 Difference]: Without dead ends: 113 [2022-01-10 02:40:07,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:07,875 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:07,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 320 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:40:07,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-10 02:40:07,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-01-10 02:40:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.5267857142857142) internal successors, (171), 112 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 171 transitions. [2022-01-10 02:40:07,923 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 171 transitions. Word has length 25 [2022-01-10 02:40:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:07,923 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 171 transitions. [2022-01-10 02:40:07,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 171 transitions. [2022-01-10 02:40:07,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 02:40:07,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:07,926 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:07,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 02:40:08,138 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 02:40:08,138 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:08,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:08,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1138040513, now seen corresponding path program 1 times [2022-01-10 02:40:08,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:08,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929484460] [2022-01-10 02:40:08,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:08,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:08,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:08,142 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 02:40:08,144 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 02:40:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:08,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:08,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:40:08,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:08,302 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:08,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929484460] [2022-01-10 02:40:08,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929484460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:08,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:08,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:08,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336145832] [2022-01-10 02:40:08,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:08,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:08,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:08,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:08,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:08,309 INFO L87 Difference]: Start difference. First operand 113 states and 171 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:08,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:08,437 INFO L93 Difference]: Finished difference Result 233 states and 356 transitions. [2022-01-10 02:40:08,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:08,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-10 02:40:08,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:08,441 INFO L225 Difference]: With dead ends: 233 [2022-01-10 02:40:08,441 INFO L226 Difference]: Without dead ends: 131 [2022-01-10 02:40:08,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:08,444 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 13 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:08,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 241 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:40:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-10 02:40:08,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2022-01-10 02:40:08,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.5039370078740157) internal successors, (191), 127 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:08,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 191 transitions. [2022-01-10 02:40:08,467 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 191 transitions. Word has length 37 [2022-01-10 02:40:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:08,470 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 191 transitions. [2022-01-10 02:40:08,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:08,471 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 191 transitions. [2022-01-10 02:40:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 02:40:08,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:08,472 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:08,481 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 02:40:08,681 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 02:40:08,682 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:08,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:08,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1126420040, now seen corresponding path program 1 times [2022-01-10 02:40:08,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:08,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856442194] [2022-01-10 02:40:08,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:08,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:08,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:08,685 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 02:40:08,687 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 02:40:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:08,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:08,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:40:08,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:08,836 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:08,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856442194] [2022-01-10 02:40:08,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856442194] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:08,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:08,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:08,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444934027] [2022-01-10 02:40:08,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:08,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:08,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:08,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:08,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:08,839 INFO L87 Difference]: Start difference. First operand 128 states and 191 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:08,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:08,856 INFO L93 Difference]: Finished difference Result 271 states and 400 transitions. [2022-01-10 02:40:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:08,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 02:40:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:08,857 INFO L225 Difference]: With dead ends: 271 [2022-01-10 02:40:08,858 INFO L226 Difference]: Without dead ends: 154 [2022-01-10 02:40:08,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:08,859 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 21 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:08,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 311 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:40:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-10 02:40:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-01-10 02:40:08,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.4640522875816993) internal successors, (224), 153 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 224 transitions. [2022-01-10 02:40:08,867 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 224 transitions. Word has length 51 [2022-01-10 02:40:08,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:08,868 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 224 transitions. [2022-01-10 02:40:08,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 224 transitions. [2022-01-10 02:40:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 02:40:08,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:08,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:08,883 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 02:40:09,078 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 02:40:09,078 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:09,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:09,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1260433546, now seen corresponding path program 1 times [2022-01-10 02:40:09,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:09,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062472523] [2022-01-10 02:40:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:09,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:09,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:09,081 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 02:40:09,083 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 02:40:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:09,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:09,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:40:09,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:09,218 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:09,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062472523] [2022-01-10 02:40:09,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062472523] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:09,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:09,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:09,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233911399] [2022-01-10 02:40:09,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:09,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:09,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:09,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:09,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:09,221 INFO L87 Difference]: Start difference. First operand 154 states and 224 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:09,326 INFO L93 Difference]: Finished difference Result 292 states and 435 transitions. [2022-01-10 02:40:09,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:09,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 02:40:09,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:09,327 INFO L225 Difference]: With dead ends: 292 [2022-01-10 02:40:09,328 INFO L226 Difference]: Without dead ends: 175 [2022-01-10 02:40:09,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:09,337 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 16 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:09,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 254 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:40:09,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-10 02:40:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2022-01-10 02:40:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.4470588235294117) internal successors, (246), 170 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 246 transitions. [2022-01-10 02:40:09,354 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 246 transitions. Word has length 51 [2022-01-10 02:40:09,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:09,354 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 246 transitions. [2022-01-10 02:40:09,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 246 transitions. [2022-01-10 02:40:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 02:40:09,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:09,356 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:09,364 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 02:40:09,557 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 02:40:09,557 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:09,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:09,558 INFO L85 PathProgramCache]: Analyzing trace with hash -457628469, now seen corresponding path program 1 times [2022-01-10 02:40:09,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:09,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779454660] [2022-01-10 02:40:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:09,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:09,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:09,560 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 02:40:09,560 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 02:40:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:09,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:40:09,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:40:09,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:40:10,109 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:10,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779454660] [2022-01-10 02:40:10,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779454660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:10,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:10,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:40:10,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683237377] [2022-01-10 02:40:10,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:10,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:40:10,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:10,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:40:10,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:40:10,114 INFO L87 Difference]: Start difference. First operand 171 states and 246 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:10,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:10,243 INFO L93 Difference]: Finished difference Result 480 states and 706 transitions. [2022-01-10 02:40:10,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:40:10,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-10 02:40:10,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:10,247 INFO L225 Difference]: With dead ends: 480 [2022-01-10 02:40:10,247 INFO L226 Difference]: Without dead ends: 346 [2022-01-10 02:40:10,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:40:10,249 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 141 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:10,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 558 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 62 Invalid, 0 Unknown, 93 Unchecked, 0.1s Time] [2022-01-10 02:40:10,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-01-10 02:40:10,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 309. [2022-01-10 02:40:10,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.4675324675324675) internal successors, (452), 308 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:10,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 452 transitions. [2022-01-10 02:40:10,267 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 452 transitions. Word has length 68 [2022-01-10 02:40:10,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:10,268 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 452 transitions. [2022-01-10 02:40:10,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:10,269 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 452 transitions. [2022-01-10 02:40:10,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 02:40:10,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:10,271 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:10,282 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 02:40:10,480 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 02:40:10,480 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:10,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:10,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2031900493, now seen corresponding path program 1 times [2022-01-10 02:40:10,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:10,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128493561] [2022-01-10 02:40:10,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:10,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:10,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:10,483 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 02:40:10,485 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 02:40:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:10,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:10,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:40:10,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:10,664 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:10,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128493561] [2022-01-10 02:40:10,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128493561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:10,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:10,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:10,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477482992] [2022-01-10 02:40:10,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:10,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:10,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:10,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:10,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:10,665 INFO L87 Difference]: Start difference. First operand 309 states and 452 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:10,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:10,690 INFO L93 Difference]: Finished difference Result 690 states and 1024 transitions. [2022-01-10 02:40:10,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:10,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-10 02:40:10,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:10,692 INFO L225 Difference]: With dead ends: 690 [2022-01-10 02:40:10,692 INFO L226 Difference]: Without dead ends: 447 [2022-01-10 02:40:10,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:10,694 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 124 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:10,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 323 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:40:10,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-10 02:40:10,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 445. [2022-01-10 02:40:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.4684684684684686) internal successors, (652), 444 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 652 transitions. [2022-01-10 02:40:10,708 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 652 transitions. Word has length 68 [2022-01-10 02:40:10,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:10,709 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 652 transitions. [2022-01-10 02:40:10,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:10,709 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 652 transitions. [2022-01-10 02:40:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 02:40:10,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:10,710 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:10,719 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 02:40:10,918 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 02:40:10,919 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:10,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:10,919 INFO L85 PathProgramCache]: Analyzing trace with hash -875025075, now seen corresponding path program 1 times [2022-01-10 02:40:10,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:10,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818986454] [2022-01-10 02:40:10,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:10,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:10,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:10,921 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 02:40:10,922 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 02:40:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:10,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:10,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:40:11,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:11,099 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:11,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818986454] [2022-01-10 02:40:11,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818986454] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:11,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:11,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:11,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103191237] [2022-01-10 02:40:11,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:11,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:11,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:11,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:11,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:11,101 INFO L87 Difference]: Start difference. First operand 445 states and 652 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:11,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:11,118 INFO L93 Difference]: Finished difference Result 604 states and 888 transitions. [2022-01-10 02:40:11,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:11,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-10 02:40:11,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:11,122 INFO L225 Difference]: With dead ends: 604 [2022-01-10 02:40:11,122 INFO L226 Difference]: Without dead ends: 447 [2022-01-10 02:40:11,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:11,123 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 122 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:11,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 464 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:40:11,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-10 02:40:11,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 445. [2022-01-10 02:40:11,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.4617117117117118) internal successors, (649), 444 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 649 transitions. [2022-01-10 02:40:11,141 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 649 transitions. Word has length 68 [2022-01-10 02:40:11,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:11,142 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 649 transitions. [2022-01-10 02:40:11,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 649 transitions. [2022-01-10 02:40:11,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 02:40:11,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:11,144 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:11,159 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 02:40:11,355 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 02:40:11,356 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:11,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:11,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1614503887, now seen corresponding path program 1 times [2022-01-10 02:40:11,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:11,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62810330] [2022-01-10 02:40:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:11,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:11,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:11,358 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 02:40:11,359 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 02:40:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:11,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:40:11,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:40:11,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:40:11,799 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:11,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62810330] [2022-01-10 02:40:11,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62810330] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:11,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:11,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-01-10 02:40:11,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965790493] [2022-01-10 02:40:11,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:11,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 02:40:11,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:11,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 02:40:11,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-10 02:40:11,801 INFO L87 Difference]: Start difference. First operand 445 states and 649 transitions. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:12,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:12,288 INFO L93 Difference]: Finished difference Result 679 states and 1016 transitions. [2022-01-10 02:40:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 02:40:12,288 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-10 02:40:12,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:12,290 INFO L225 Difference]: With dead ends: 679 [2022-01-10 02:40:12,290 INFO L226 Difference]: Without dead ends: 523 [2022-01-10 02:40:12,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-01-10 02:40:12,292 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 444 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:12,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 1360 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 02:40:12,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-10 02:40:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 504. [2022-01-10 02:40:12,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.4274353876739563) internal successors, (718), 503 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 718 transitions. [2022-01-10 02:40:12,321 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 718 transitions. Word has length 68 [2022-01-10 02:40:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:12,321 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 718 transitions. [2022-01-10 02:40:12,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 718 transitions. [2022-01-10 02:40:12,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 02:40:12,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:12,322 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:12,330 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 02:40:12,530 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 02:40:12,531 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1306206804, now seen corresponding path program 1 times [2022-01-10 02:40:12,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49008683] [2022-01-10 02:40:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:12,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:12,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:12,534 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 02:40:12,536 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 02:40:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:12,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:40:12,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:40:12,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:40:12,898 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:12,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49008683] [2022-01-10 02:40:12,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49008683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:12,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:12,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:40:12,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779751528] [2022-01-10 02:40:12,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:12,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:40:12,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:12,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:40:12,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:40:12,901 INFO L87 Difference]: Start difference. First operand 504 states and 718 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:12,920 INFO L93 Difference]: Finished difference Result 679 states and 985 transitions. [2022-01-10 02:40:12,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:40:12,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-10 02:40:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:12,924 INFO L225 Difference]: With dead ends: 679 [2022-01-10 02:40:12,924 INFO L226 Difference]: Without dead ends: 522 [2022-01-10 02:40:12,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:40:12,926 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 50 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:12,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 467 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 103 Unchecked, 0.0s Time] [2022-01-10 02:40:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-01-10 02:40:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2022-01-10 02:40:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 1.437619961612284) internal successors, (749), 521 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:12,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 749 transitions. [2022-01-10 02:40:12,938 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 749 transitions. Word has length 69 [2022-01-10 02:40:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:12,938 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 749 transitions. [2022-01-10 02:40:12,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 749 transitions. [2022-01-10 02:40:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 02:40:12,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:12,940 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:12,948 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 02:40:13,148 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 02:40:13,148 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:13,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:13,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1213476542, now seen corresponding path program 1 times [2022-01-10 02:40:13,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:13,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381174186] [2022-01-10 02:40:13,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:13,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:13,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:13,150 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 02:40:13,152 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 02:40:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:13,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:13,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 02:40:13,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:13,315 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:13,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381174186] [2022-01-10 02:40:13,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381174186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:13,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:13,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:13,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120094355] [2022-01-10 02:40:13,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:13,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:13,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:13,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:13,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:13,317 INFO L87 Difference]: Start difference. First operand 522 states and 749 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:13,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:13,337 INFO L93 Difference]: Finished difference Result 1380 states and 1963 transitions. [2022-01-10 02:40:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:13,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-01-10 02:40:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:13,341 INFO L225 Difference]: With dead ends: 1380 [2022-01-10 02:40:13,342 INFO L226 Difference]: Without dead ends: 924 [2022-01-10 02:40:13,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:13,343 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 123 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:13,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 353 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:40:13,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-01-10 02:40:13,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 922. [2022-01-10 02:40:13,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 1.3952225841476655) internal successors, (1285), 921 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:13,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1285 transitions. [2022-01-10 02:40:13,366 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1285 transitions. Word has length 73 [2022-01-10 02:40:13,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:13,366 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 1285 transitions. [2022-01-10 02:40:13,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:13,366 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1285 transitions. [2022-01-10 02:40:13,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 02:40:13,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:13,368 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:13,380 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 02:40:13,577 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 02:40:13,577 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:13,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:13,578 INFO L85 PathProgramCache]: Analyzing trace with hash 328393676, now seen corresponding path program 1 times [2022-01-10 02:40:13,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:13,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507386798] [2022-01-10 02:40:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:13,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:13,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:13,580 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 02:40:13,580 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 02:40:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:13,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:13,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 02:40:13,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:13,740 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:13,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507386798] [2022-01-10 02:40:13,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507386798] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:13,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:13,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:13,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697022312] [2022-01-10 02:40:13,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:13,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:13,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:13,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:13,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:13,742 INFO L87 Difference]: Start difference. First operand 922 states and 1285 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:13,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:13,765 INFO L93 Difference]: Finished difference Result 1792 states and 2503 transitions. [2022-01-10 02:40:13,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:13,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-01-10 02:40:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:13,769 INFO L225 Difference]: With dead ends: 1792 [2022-01-10 02:40:13,769 INFO L226 Difference]: Without dead ends: 936 [2022-01-10 02:40:13,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:13,770 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 148 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:13,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 172 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:40:13,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-01-10 02:40:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 928. [2022-01-10 02:40:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.3807982740021576) internal successors, (1280), 927 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:13,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1280 transitions. [2022-01-10 02:40:13,795 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1280 transitions. Word has length 75 [2022-01-10 02:40:13,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:13,795 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 1280 transitions. [2022-01-10 02:40:13,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:13,795 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1280 transitions. [2022-01-10 02:40:13,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 02:40:13,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:13,798 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:13,809 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 02:40:14,006 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 02:40:14,007 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:14,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:14,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1251779988, now seen corresponding path program 1 times [2022-01-10 02:40:14,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:14,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477623377] [2022-01-10 02:40:14,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:14,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:14,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:14,009 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 02:40:14,010 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 02:40:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:14,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:40:14,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 02:40:14,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:14,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:14,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477623377] [2022-01-10 02:40:14,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477623377] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:14,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:14,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:14,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920835614] [2022-01-10 02:40:14,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:14,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:14,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:14,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:14,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:14,187 INFO L87 Difference]: Start difference. First operand 928 states and 1280 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:14,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:14,232 INFO L93 Difference]: Finished difference Result 2716 states and 3727 transitions. [2022-01-10 02:40:14,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:14,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 02:40:14,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:14,238 INFO L225 Difference]: With dead ends: 2716 [2022-01-10 02:40:14,238 INFO L226 Difference]: Without dead ends: 1808 [2022-01-10 02:40:14,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:14,239 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 133 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:14,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 326 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:40:14,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2022-01-10 02:40:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1806. [2022-01-10 02:40:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 1.3573407202216066) internal successors, (2450), 1805 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:14,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2450 transitions. [2022-01-10 02:40:14,286 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2450 transitions. Word has length 79 [2022-01-10 02:40:14,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:14,286 INFO L470 AbstractCegarLoop]: Abstraction has 1806 states and 2450 transitions. [2022-01-10 02:40:14,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2450 transitions. [2022-01-10 02:40:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 02:40:14,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:14,288 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:14,297 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 02:40:14,497 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 02:40:14,497 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:14,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:14,498 INFO L85 PathProgramCache]: Analyzing trace with hash -2117921424, now seen corresponding path program 1 times [2022-01-10 02:40:14,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:14,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246030493] [2022-01-10 02:40:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:14,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:14,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:14,499 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 02:40:14,502 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 02:40:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:14,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:14,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 02:40:14,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:14,692 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:14,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246030493] [2022-01-10 02:40:14,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246030493] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:14,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:14,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:14,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796342678] [2022-01-10 02:40:14,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:14,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:14,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:14,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:14,694 INFO L87 Difference]: Start difference. First operand 1806 states and 2450 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:14,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:14,722 INFO L93 Difference]: Finished difference Result 2698 states and 3652 transitions. [2022-01-10 02:40:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:14,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-01-10 02:40:14,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:14,729 INFO L225 Difference]: With dead ends: 2698 [2022-01-10 02:40:14,729 INFO L226 Difference]: Without dead ends: 1808 [2022-01-10 02:40:14,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:14,731 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 122 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:14,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 480 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:40:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2022-01-10 02:40:14,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1806. [2022-01-10 02:40:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 1.3445983379501385) internal successors, (2427), 1805 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2427 transitions. [2022-01-10 02:40:14,775 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2427 transitions. Word has length 80 [2022-01-10 02:40:14,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:14,775 INFO L470 AbstractCegarLoop]: Abstraction has 1806 states and 2427 transitions. [2022-01-10 02:40:14,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:14,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2427 transitions. [2022-01-10 02:40:14,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 02:40:14,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:14,778 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:14,787 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 02:40:14,987 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 02:40:14,987 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:14,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:14,988 INFO L85 PathProgramCache]: Analyzing trace with hash 210032922, now seen corresponding path program 1 times [2022-01-10 02:40:14,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:14,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638038492] [2022-01-10 02:40:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:14,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:14,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:14,989 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 02:40:14,990 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 02:40:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:15,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 02:40:15,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 02:40:15,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 02:40:15,422 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:15,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638038492] [2022-01-10 02:40:15,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638038492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:15,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:15,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:40:15,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495686523] [2022-01-10 02:40:15,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:15,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:40:15,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:40:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:40:15,423 INFO L87 Difference]: Start difference. First operand 1806 states and 2427 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:15,589 INFO L93 Difference]: Finished difference Result 3533 states and 4858 transitions. [2022-01-10 02:40:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:40:15,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 02:40:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:15,597 INFO L225 Difference]: With dead ends: 3533 [2022-01-10 02:40:15,597 INFO L226 Difference]: Without dead ends: 2157 [2022-01-10 02:40:15,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:40:15,599 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 145 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:15,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 413 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 47 Invalid, 0 Unknown, 145 Unchecked, 0.1s Time] [2022-01-10 02:40:15,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2022-01-10 02:40:15,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1955. [2022-01-10 02:40:15,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1955 states, 1954 states have (on average 1.373080859774821) internal successors, (2683), 1954 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2683 transitions. [2022-01-10 02:40:15,658 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 2683 transitions. Word has length 81 [2022-01-10 02:40:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:15,659 INFO L470 AbstractCegarLoop]: Abstraction has 1955 states and 2683 transitions. [2022-01-10 02:40:15,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:15,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 2683 transitions. [2022-01-10 02:40:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-10 02:40:15,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:15,661 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:15,670 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 02:40:15,870 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 02:40:15,871 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:15,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:15,871 INFO L85 PathProgramCache]: Analyzing trace with hash -913619447, now seen corresponding path program 1 times [2022-01-10 02:40:15,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:15,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654380468] [2022-01-10 02:40:15,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:15,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:15,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:15,873 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 02:40:15,875 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 02:40:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:15,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:40:15,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:40:16,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:40:16,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:16,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654380468] [2022-01-10 02:40:16,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654380468] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:16,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:16,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:40:16,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476189595] [2022-01-10 02:40:16,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:16,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:40:16,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:16,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:40:16,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:40:16,307 INFO L87 Difference]: Start difference. First operand 1955 states and 2683 transitions. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:16,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:16,451 INFO L93 Difference]: Finished difference Result 3798 states and 5258 transitions. [2022-01-10 02:40:16,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:40:16,452 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-01-10 02:40:16,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:16,458 INFO L225 Difference]: With dead ends: 3798 [2022-01-10 02:40:16,458 INFO L226 Difference]: Without dead ends: 2252 [2022-01-10 02:40:16,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:40:16,460 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 167 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:16,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 436 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 64 Invalid, 0 Unknown, 136 Unchecked, 0.1s Time] [2022-01-10 02:40:16,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2022-01-10 02:40:16,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 2100. [2022-01-10 02:40:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 1.3611243449261554) internal successors, (2857), 2099 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 2857 transitions. [2022-01-10 02:40:16,510 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 2857 transitions. Word has length 86 [2022-01-10 02:40:16,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:16,510 INFO L470 AbstractCegarLoop]: Abstraction has 2100 states and 2857 transitions. [2022-01-10 02:40:16,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 2857 transitions. [2022-01-10 02:40:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-10 02:40:16,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:16,513 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:16,524 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 02:40:16,722 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 02:40:16,722 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:16,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:16,722 INFO L85 PathProgramCache]: Analyzing trace with hash 751712707, now seen corresponding path program 1 times [2022-01-10 02:40:16,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:16,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471117764] [2022-01-10 02:40:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:16,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:16,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:16,724 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 02:40:16,726 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 02:40:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:16,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:40:16,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 41 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:40:16,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 41 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:40:17,142 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:17,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471117764] [2022-01-10 02:40:17,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471117764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:17,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:17,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:40:17,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211392014] [2022-01-10 02:40:17,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:17,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:40:17,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:17,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:40:17,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:40:17,144 INFO L87 Difference]: Start difference. First operand 2100 states and 2857 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:17,185 INFO L93 Difference]: Finished difference Result 2599 states and 3586 transitions. [2022-01-10 02:40:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:40:17,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-01-10 02:40:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:17,192 INFO L225 Difference]: With dead ends: 2599 [2022-01-10 02:40:17,192 INFO L226 Difference]: Without dead ends: 2112 [2022-01-10 02:40:17,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:40:17,194 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 47 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:17,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 476 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 103 Unchecked, 0.0s Time] [2022-01-10 02:40:17,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2022-01-10 02:40:17,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 2112. [2022-01-10 02:40:17,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 1.3619137849360492) internal successors, (2875), 2111 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 2875 transitions. [2022-01-10 02:40:17,250 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 2875 transitions. Word has length 88 [2022-01-10 02:40:17,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:17,250 INFO L470 AbstractCegarLoop]: Abstraction has 2112 states and 2875 transitions. [2022-01-10 02:40:17,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:17,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 2875 transitions. [2022-01-10 02:40:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-10 02:40:17,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:17,254 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:17,265 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 02:40:17,465 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 02:40:17,465 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:17,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:17,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1734054716, now seen corresponding path program 1 times [2022-01-10 02:40:17,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:17,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192491994] [2022-01-10 02:40:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:17,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:17,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:17,467 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 02:40:17,468 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 02:40:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:17,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:40:17,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:40:17,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:40:17,892 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:17,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192491994] [2022-01-10 02:40:17,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192491994] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:17,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:17,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:40:17,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421942913] [2022-01-10 02:40:17,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:17,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:40:17,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:17,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:40:17,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:40:17,894 INFO L87 Difference]: Start difference. First operand 2112 states and 2875 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:18,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:18,044 INFO L93 Difference]: Finished difference Result 3868 states and 5329 transitions. [2022-01-10 02:40:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:40:18,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-01-10 02:40:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:18,052 INFO L225 Difference]: With dead ends: 3868 [2022-01-10 02:40:18,052 INFO L226 Difference]: Without dead ends: 2322 [2022-01-10 02:40:18,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:40:18,054 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 148 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:18,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 578 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 64 Invalid, 0 Unknown, 142 Unchecked, 0.1s Time] [2022-01-10 02:40:18,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-01-10 02:40:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2112. [2022-01-10 02:40:18,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 1.354334438654666) internal successors, (2859), 2111 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:18,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 2859 transitions. [2022-01-10 02:40:18,105 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 2859 transitions. Word has length 89 [2022-01-10 02:40:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:18,105 INFO L470 AbstractCegarLoop]: Abstraction has 2112 states and 2859 transitions. [2022-01-10 02:40:18,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 2859 transitions. [2022-01-10 02:40:18,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-10 02:40:18,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:18,108 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:18,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 02:40:18,316 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 02:40:18,317 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:18,317 INFO L85 PathProgramCache]: Analyzing trace with hash 362542619, now seen corresponding path program 1 times [2022-01-10 02:40:18,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:18,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840157671] [2022-01-10 02:40:18,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:18,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:18,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:18,319 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 02:40:18,321 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 02:40:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:18,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:18,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 02:40:18,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:18,509 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:18,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840157671] [2022-01-10 02:40:18,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840157671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:18,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:18,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:18,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305832252] [2022-01-10 02:40:18,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:18,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:18,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:18,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:18,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:18,511 INFO L87 Difference]: Start difference. First operand 2112 states and 2859 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:18,562 INFO L93 Difference]: Finished difference Result 2942 states and 3987 transitions. [2022-01-10 02:40:18,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:18,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-01-10 02:40:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:18,571 INFO L225 Difference]: With dead ends: 2942 [2022-01-10 02:40:18,571 INFO L226 Difference]: Without dead ends: 2060 [2022-01-10 02:40:18,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:18,572 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 136 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:18,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 461 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:40:18,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-01-10 02:40:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 2058. [2022-01-10 02:40:18,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 1.3388429752066116) internal successors, (2754), 2057 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 2754 transitions. [2022-01-10 02:40:18,623 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 2754 transitions. Word has length 90 [2022-01-10 02:40:18,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:18,623 INFO L470 AbstractCegarLoop]: Abstraction has 2058 states and 2754 transitions. [2022-01-10 02:40:18,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:18,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 2754 transitions. [2022-01-10 02:40:18,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-10 02:40:18,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:18,626 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:18,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-01-10 02:40:18,835 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 02:40:18,835 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:18,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1147874306, now seen corresponding path program 1 times [2022-01-10 02:40:18,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:18,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280866887] [2022-01-10 02:40:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:18,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:18,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:18,837 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 02:40:18,860 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 02:40:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:18,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:40:18,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:19,049 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 81 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 02:40:19,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 81 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 02:40:19,249 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:19,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280866887] [2022-01-10 02:40:19,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280866887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:19,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:19,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:40:19,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695202734] [2022-01-10 02:40:19,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:19,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:40:19,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:19,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:40:19,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:40:19,251 INFO L87 Difference]: Start difference. First operand 2058 states and 2754 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:19,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:19,494 INFO L93 Difference]: Finished difference Result 4426 states and 6040 transitions. [2022-01-10 02:40:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 02:40:19,495 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-01-10 02:40:19,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:19,505 INFO L225 Difference]: With dead ends: 4426 [2022-01-10 02:40:19,505 INFO L226 Difference]: Without dead ends: 2880 [2022-01-10 02:40:19,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:40:19,508 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 380 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:19,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 436 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 148 Invalid, 0 Unknown, 158 Unchecked, 0.2s Time] [2022-01-10 02:40:19,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2022-01-10 02:40:19,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2778. [2022-01-10 02:40:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2778 states, 2777 states have (on average 1.3539791141519626) internal successors, (3760), 2777 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 3760 transitions. [2022-01-10 02:40:19,588 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 3760 transitions. Word has length 100 [2022-01-10 02:40:19,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:19,589 INFO L470 AbstractCegarLoop]: Abstraction has 2778 states and 3760 transitions. [2022-01-10 02:40:19,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 3760 transitions. [2022-01-10 02:40:19,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-10 02:40:19,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:19,594 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:19,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 02:40:19,803 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 02:40:19,803 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:19,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:19,803 INFO L85 PathProgramCache]: Analyzing trace with hash -355224684, now seen corresponding path program 1 times [2022-01-10 02:40:19,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:19,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049857305] [2022-01-10 02:40:19,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:19,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:19,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:19,805 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 02:40:19,840 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 02:40:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:19,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:40:19,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 81 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 02:40:20,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 81 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 02:40:20,282 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:20,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049857305] [2022-01-10 02:40:20,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049857305] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:20,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:20,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:40:20,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321170246] [2022-01-10 02:40:20,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:20,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:40:20,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:20,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:40:20,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:40:20,284 INFO L87 Difference]: Start difference. First operand 2778 states and 3760 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:20,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:20,440 INFO L93 Difference]: Finished difference Result 5163 states and 7049 transitions. [2022-01-10 02:40:20,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:40:20,441 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-01-10 02:40:20,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:20,450 INFO L225 Difference]: With dead ends: 5163 [2022-01-10 02:40:20,451 INFO L226 Difference]: Without dead ends: 2897 [2022-01-10 02:40:20,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:40:20,454 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 154 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:20,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 430 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 63 Invalid, 0 Unknown, 90 Unchecked, 0.1s Time] [2022-01-10 02:40:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2022-01-10 02:40:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2779. [2022-01-10 02:40:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 2778 states have (on average 1.3444924406047516) internal successors, (3735), 2778 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 3735 transitions. [2022-01-10 02:40:20,523 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 3735 transitions. Word has length 101 [2022-01-10 02:40:20,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:20,524 INFO L470 AbstractCegarLoop]: Abstraction has 2779 states and 3735 transitions. [2022-01-10 02:40:20,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:20,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 3735 transitions. [2022-01-10 02:40:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 02:40:20,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:20,528 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:20,537 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 02:40:20,736 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 02:40:20,737 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:20,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:20,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1529586067, now seen corresponding path program 1 times [2022-01-10 02:40:20,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:20,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834398502] [2022-01-10 02:40:20,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:20,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:20,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:20,739 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 02:40:20,741 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 02:40:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:20,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:40:20,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 82 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 02:40:20,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 82 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 02:40:21,141 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:21,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834398502] [2022-01-10 02:40:21,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834398502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:21,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:21,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:40:21,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147729630] [2022-01-10 02:40:21,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:21,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:40:21,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:21,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:40:21,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:40:21,143 INFO L87 Difference]: Start difference. First operand 2779 states and 3735 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:21,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:21,314 INFO L93 Difference]: Finished difference Result 5163 states and 6998 transitions. [2022-01-10 02:40:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:40:21,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-01-10 02:40:21,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:21,323 INFO L225 Difference]: With dead ends: 5163 [2022-01-10 02:40:21,324 INFO L226 Difference]: Without dead ends: 2897 [2022-01-10 02:40:21,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:40:21,327 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 136 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:21,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 559 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 68 Invalid, 0 Unknown, 115 Unchecked, 0.1s Time] [2022-01-10 02:40:21,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2022-01-10 02:40:21,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2779. [2022-01-10 02:40:21,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 2778 states have (on average 1.3347732181425487) internal successors, (3708), 2778 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:21,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 3708 transitions. [2022-01-10 02:40:21,400 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 3708 transitions. Word has length 102 [2022-01-10 02:40:21,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:21,401 INFO L470 AbstractCegarLoop]: Abstraction has 2779 states and 3708 transitions. [2022-01-10 02:40:21,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:21,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 3708 transitions. [2022-01-10 02:40:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 02:40:21,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:21,406 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:21,416 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 02:40:21,614 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 02:40:21,615 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:21,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:21,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2140745463, now seen corresponding path program 1 times [2022-01-10 02:40:21,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:21,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007388551] [2022-01-10 02:40:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:21,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:21,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:21,617 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 02:40:21,617 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 02:40:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:21,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 02:40:21,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 55 proven. 33 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 02:40:21,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 55 proven. 33 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 02:40:22,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:22,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007388551] [2022-01-10 02:40:22,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007388551] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:22,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:22,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:40:22,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873587016] [2022-01-10 02:40:22,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:22,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:40:22,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:22,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:40:22,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:40:22,037 INFO L87 Difference]: Start difference. First operand 2779 states and 3708 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:22,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:22,188 INFO L93 Difference]: Finished difference Result 3286 states and 4408 transitions. [2022-01-10 02:40:22,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:40:22,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-01-10 02:40:22,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:22,206 INFO L225 Difference]: With dead ends: 3286 [2022-01-10 02:40:22,206 INFO L226 Difference]: Without dead ends: 2904 [2022-01-10 02:40:22,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:40:22,208 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 139 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:22,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 408 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 52 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2022-01-10 02:40:22,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2022-01-10 02:40:22,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2779. [2022-01-10 02:40:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 2778 states have (on average 1.3344132469402448) internal successors, (3707), 2778 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:22,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 3707 transitions. [2022-01-10 02:40:22,276 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 3707 transitions. Word has length 102 [2022-01-10 02:40:22,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:22,277 INFO L470 AbstractCegarLoop]: Abstraction has 2779 states and 3707 transitions. [2022-01-10 02:40:22,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:22,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 3707 transitions. [2022-01-10 02:40:22,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-10 02:40:22,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:22,281 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:22,292 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 02:40:22,489 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 02:40:22,490 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:22,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:22,490 INFO L85 PathProgramCache]: Analyzing trace with hash 88427331, now seen corresponding path program 1 times [2022-01-10 02:40:22,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:22,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071831977] [2022-01-10 02:40:22,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:22,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:22,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:22,492 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 02:40:22,492 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 02:40:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:22,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 02:40:22,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 53 proven. 33 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 02:40:22,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 53 proven. 33 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 02:40:22,956 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:22,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071831977] [2022-01-10 02:40:22,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071831977] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:22,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:22,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:40:22,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751577162] [2022-01-10 02:40:22,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:22,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:40:22,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:22,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:40:22,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:40:22,957 INFO L87 Difference]: Start difference. First operand 2779 states and 3707 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:23,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:23,118 INFO L93 Difference]: Finished difference Result 5381 states and 7266 transitions. [2022-01-10 02:40:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:40:23,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-01-10 02:40:23,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:23,124 INFO L225 Difference]: With dead ends: 5381 [2022-01-10 02:40:23,124 INFO L226 Difference]: Without dead ends: 3115 [2022-01-10 02:40:23,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:40:23,128 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 122 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:23,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 568 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 64 Invalid, 0 Unknown, 93 Unchecked, 0.1s Time] [2022-01-10 02:40:23,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2022-01-10 02:40:23,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 2986. [2022-01-10 02:40:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 1.338358458961474) internal successors, (3995), 2985 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 3995 transitions. [2022-01-10 02:40:23,199 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 3995 transitions. Word has length 104 [2022-01-10 02:40:23,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:23,199 INFO L470 AbstractCegarLoop]: Abstraction has 2986 states and 3995 transitions. [2022-01-10 02:40:23,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:23,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 3995 transitions. [2022-01-10 02:40:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-10 02:40:23,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:23,203 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:23,212 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 02:40:23,412 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 02:40:23,412 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:23,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:23,413 INFO L85 PathProgramCache]: Analyzing trace with hash 2022672797, now seen corresponding path program 1 times [2022-01-10 02:40:23,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:23,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706091345] [2022-01-10 02:40:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:23,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:23,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:23,414 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 02:40:23,415 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 02:40:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:23,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:23,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 02:40:23,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:23,587 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:23,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706091345] [2022-01-10 02:40:23,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706091345] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:23,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:23,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:23,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440998308] [2022-01-10 02:40:23,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:23,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:23,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:23,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:23,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:23,589 INFO L87 Difference]: Start difference. First operand 2986 states and 3995 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:23,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:23,681 INFO L93 Difference]: Finished difference Result 8564 states and 11548 transitions. [2022-01-10 02:40:23,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:23,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-01-10 02:40:23,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:23,688 INFO L225 Difference]: With dead ends: 8564 [2022-01-10 02:40:23,688 INFO L226 Difference]: Without dead ends: 5759 [2022-01-10 02:40:23,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:23,690 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 123 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:23,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 358 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:40:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5759 states. [2022-01-10 02:40:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5759 to 5759. [2022-01-10 02:40:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5759 states, 5758 states have (on average 1.3318860715526224) internal successors, (7669), 5758 states have internal predecessors, (7669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:23,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5759 states to 5759 states and 7669 transitions. [2022-01-10 02:40:23,829 INFO L78 Accepts]: Start accepts. Automaton has 5759 states and 7669 transitions. Word has length 104 [2022-01-10 02:40:23,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:23,830 INFO L470 AbstractCegarLoop]: Abstraction has 5759 states and 7669 transitions. [2022-01-10 02:40:23,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:23,830 INFO L276 IsEmpty]: Start isEmpty. Operand 5759 states and 7669 transitions. [2022-01-10 02:40:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-10 02:40:23,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:23,838 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:23,846 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 02:40:24,046 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 02:40:24,046 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:24,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:24,047 INFO L85 PathProgramCache]: Analyzing trace with hash -674941071, now seen corresponding path program 1 times [2022-01-10 02:40:24,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:24,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816191720] [2022-01-10 02:40:24,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:24,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:24,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:24,049 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 02:40:24,050 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 02:40:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:24,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:24,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-10 02:40:24,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:24,212 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:24,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816191720] [2022-01-10 02:40:24,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816191720] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:24,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:24,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:24,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310561138] [2022-01-10 02:40:24,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:24,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:24,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:24,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:24,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:24,213 INFO L87 Difference]: Start difference. First operand 5759 states and 7669 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:24,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:24,308 INFO L93 Difference]: Finished difference Result 11330 states and 15093 transitions. [2022-01-10 02:40:24,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:24,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-01-10 02:40:24,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:24,319 INFO L225 Difference]: With dead ends: 11330 [2022-01-10 02:40:24,319 INFO L226 Difference]: Without dead ends: 5752 [2022-01-10 02:40:24,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:24,325 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 10 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:24,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 340 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:40:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5752 states. [2022-01-10 02:40:24,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5752 to 5752. [2022-01-10 02:40:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5752 states, 5751 states have (on average 1.3232481307598678) internal successors, (7610), 5751 states have internal predecessors, (7610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5752 states to 5752 states and 7610 transitions. [2022-01-10 02:40:24,482 INFO L78 Accepts]: Start accepts. Automaton has 5752 states and 7610 transitions. Word has length 105 [2022-01-10 02:40:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:24,483 INFO L470 AbstractCegarLoop]: Abstraction has 5752 states and 7610 transitions. [2022-01-10 02:40:24,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 5752 states and 7610 transitions. [2022-01-10 02:40:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 02:40:24,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:24,487 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:24,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-01-10 02:40:24,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:24,696 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:24,696 INFO L85 PathProgramCache]: Analyzing trace with hash 557006567, now seen corresponding path program 1 times [2022-01-10 02:40:24,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:24,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289728644] [2022-01-10 02:40:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:24,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:24,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:24,698 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:24,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 02:40:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:24,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:24,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-10 02:40:24,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:24,881 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:24,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289728644] [2022-01-10 02:40:24,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289728644] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:24,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:24,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:24,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226182953] [2022-01-10 02:40:24,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:24,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:24,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:24,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:24,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:24,882 INFO L87 Difference]: Start difference. First operand 5752 states and 7610 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:25,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:25,026 INFO L93 Difference]: Finished difference Result 13238 states and 17729 transitions. [2022-01-10 02:40:25,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:25,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-01-10 02:40:25,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:25,041 INFO L225 Difference]: With dead ends: 13238 [2022-01-10 02:40:25,042 INFO L226 Difference]: Without dead ends: 8081 [2022-01-10 02:40:25,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:25,051 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 122 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:25,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 461 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:40:25,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8081 states. [2022-01-10 02:40:25,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8081 to 8081. [2022-01-10 02:40:25,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8081 states, 8080 states have (on average 1.3294554455445544) internal successors, (10742), 8080 states have internal predecessors, (10742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8081 states to 8081 states and 10742 transitions. [2022-01-10 02:40:25,285 INFO L78 Accepts]: Start accepts. Automaton has 8081 states and 10742 transitions. Word has length 106 [2022-01-10 02:40:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:25,287 INFO L470 AbstractCegarLoop]: Abstraction has 8081 states and 10742 transitions. [2022-01-10 02:40:25,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 8081 states and 10742 transitions. [2022-01-10 02:40:25,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 02:40:25,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:25,293 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:25,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 02:40:25,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:25,501 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:25,502 INFO L85 PathProgramCache]: Analyzing trace with hash 422993061, now seen corresponding path program 1 times [2022-01-10 02:40:25,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:25,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220993934] [2022-01-10 02:40:25,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:25,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:25,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:25,504 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:25,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 02:40:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:25,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:25,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-10 02:40:25,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:25,689 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:25,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220993934] [2022-01-10 02:40:25,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220993934] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:25,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:25,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:25,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356768167] [2022-01-10 02:40:25,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:25,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:25,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:25,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:25,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:25,691 INFO L87 Difference]: Start difference. First operand 8081 states and 10742 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:25,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:25,829 INFO L93 Difference]: Finished difference Result 17783 states and 23805 transitions. [2022-01-10 02:40:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:25,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-01-10 02:40:25,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:25,848 INFO L225 Difference]: With dead ends: 17783 [2022-01-10 02:40:25,849 INFO L226 Difference]: Without dead ends: 10297 [2022-01-10 02:40:25,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:25,859 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 126 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:25,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 460 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:40:25,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10297 states. [2022-01-10 02:40:26,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10297 to 10297. [2022-01-10 02:40:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10297 states, 10296 states have (on average 1.3292540792540792) internal successors, (13686), 10296 states have internal predecessors, (13686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:26,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10297 states to 10297 states and 13686 transitions. [2022-01-10 02:40:26,095 INFO L78 Accepts]: Start accepts. Automaton has 10297 states and 13686 transitions. Word has length 106 [2022-01-10 02:40:26,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:26,095 INFO L470 AbstractCegarLoop]: Abstraction has 10297 states and 13686 transitions. [2022-01-10 02:40:26,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:26,095 INFO L276 IsEmpty]: Start isEmpty. Operand 10297 states and 13686 transitions. [2022-01-10 02:40:26,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-10 02:40:26,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:26,107 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:26,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 02:40:26,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:26,313 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:26,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:26,314 INFO L85 PathProgramCache]: Analyzing trace with hash 735694808, now seen corresponding path program 1 times [2022-01-10 02:40:26,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:26,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658186164] [2022-01-10 02:40:26,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:26,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:26,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:26,315 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:26,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 02:40:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:26,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 02:40:26,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 156 proven. 33 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-10 02:40:26,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 156 proven. 33 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-10 02:40:26,849 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:26,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658186164] [2022-01-10 02:40:26,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658186164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:26,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:26,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:40:26,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246168421] [2022-01-10 02:40:26,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:26,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:40:26,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:26,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:40:26,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:40:26,850 INFO L87 Difference]: Start difference. First operand 10297 states and 13686 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:27,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:27,160 INFO L93 Difference]: Finished difference Result 12424 states and 16534 transitions. [2022-01-10 02:40:27,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:40:27,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2022-01-10 02:40:27,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:27,181 INFO L225 Difference]: With dead ends: 12424 [2022-01-10 02:40:27,181 INFO L226 Difference]: Without dead ends: 10772 [2022-01-10 02:40:27,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:40:27,187 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 121 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:27,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 589 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 65 Invalid, 0 Unknown, 147 Unchecked, 0.1s Time] [2022-01-10 02:40:27,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10772 states. [2022-01-10 02:40:27,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10772 to 10184. [2022-01-10 02:40:27,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10184 states, 10183 states have (on average 1.3303545124226652) internal successors, (13547), 10183 states have internal predecessors, (13547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:27,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10184 states to 10184 states and 13547 transitions. [2022-01-10 02:40:27,411 INFO L78 Accepts]: Start accepts. Automaton has 10184 states and 13547 transitions. Word has length 148 [2022-01-10 02:40:27,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:27,411 INFO L470 AbstractCegarLoop]: Abstraction has 10184 states and 13547 transitions. [2022-01-10 02:40:27,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:27,411 INFO L276 IsEmpty]: Start isEmpty. Operand 10184 states and 13547 transitions. [2022-01-10 02:40:27,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-10 02:40:27,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:27,421 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:27,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-01-10 02:40:27,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:27,626 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:27,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:27,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2116934414, now seen corresponding path program 1 times [2022-01-10 02:40:27,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:27,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242471683] [2022-01-10 02:40:27,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:27,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:27,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:27,628 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:27,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 02:40:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:27,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:27,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-10 02:40:27,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:27,855 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:27,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242471683] [2022-01-10 02:40:27,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242471683] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:27,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:27,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:27,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271848137] [2022-01-10 02:40:27,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:27,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:27,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:27,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:27,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:27,856 INFO L87 Difference]: Start difference. First operand 10184 states and 13547 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:28,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:28,080 INFO L93 Difference]: Finished difference Result 20032 states and 26695 transitions. [2022-01-10 02:40:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:28,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-01-10 02:40:28,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:28,097 INFO L225 Difference]: With dead ends: 20032 [2022-01-10 02:40:28,097 INFO L226 Difference]: Without dead ends: 10330 [2022-01-10 02:40:28,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:28,108 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 19 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:28,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 256 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:40:28,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10330 states. [2022-01-10 02:40:28,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10330 to 10184. [2022-01-10 02:40:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10184 states, 10183 states have (on average 1.302072080919179) internal successors, (13259), 10183 states have internal predecessors, (13259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10184 states to 10184 states and 13259 transitions. [2022-01-10 02:40:28,326 INFO L78 Accepts]: Start accepts. Automaton has 10184 states and 13259 transitions. Word has length 160 [2022-01-10 02:40:28,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:28,328 INFO L470 AbstractCegarLoop]: Abstraction has 10184 states and 13259 transitions. [2022-01-10 02:40:28,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:28,328 INFO L276 IsEmpty]: Start isEmpty. Operand 10184 states and 13259 transitions. [2022-01-10 02:40:28,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-10 02:40:28,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:28,340 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:28,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-01-10 02:40:28,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:28,549 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:28,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:28,549 INFO L85 PathProgramCache]: Analyzing trace with hash -247606190, now seen corresponding path program 1 times [2022-01-10 02:40:28,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:28,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701976113] [2022-01-10 02:40:28,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:28,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:28,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:28,551 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:28,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 02:40:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:28,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:28,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 321 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-01-10 02:40:28,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:28,826 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:28,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701976113] [2022-01-10 02:40:28,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701976113] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:28,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:28,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:28,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292794466] [2022-01-10 02:40:28,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:28,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:28,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:28,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:28,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:28,828 INFO L87 Difference]: Start difference. First operand 10184 states and 13259 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:29,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:29,023 INFO L93 Difference]: Finished difference Result 21098 states and 27642 transitions. [2022-01-10 02:40:29,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:29,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2022-01-10 02:40:29,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:29,036 INFO L225 Difference]: With dead ends: 21098 [2022-01-10 02:40:29,036 INFO L226 Difference]: Without dead ends: 11396 [2022-01-10 02:40:29,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:29,047 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 18 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:29,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 258 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:40:29,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11396 states. [2022-01-10 02:40:29,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11396 to 11252. [2022-01-10 02:40:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11252 states, 11251 states have (on average 1.2765976357657096) internal successors, (14363), 11251 states have internal predecessors, (14363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11252 states to 11252 states and 14363 transitions. [2022-01-10 02:40:29,282 INFO L78 Accepts]: Start accepts. Automaton has 11252 states and 14363 transitions. Word has length 181 [2022-01-10 02:40:29,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:29,282 INFO L470 AbstractCegarLoop]: Abstraction has 11252 states and 14363 transitions. [2022-01-10 02:40:29,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:29,282 INFO L276 IsEmpty]: Start isEmpty. Operand 11252 states and 14363 transitions. [2022-01-10 02:40:29,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-10 02:40:29,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:29,293 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:29,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-01-10 02:40:29,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:29,495 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1278736639, now seen corresponding path program 1 times [2022-01-10 02:40:29,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:29,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805230850] [2022-01-10 02:40:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:29,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:29,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:29,497 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:29,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 02:40:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:29,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:29,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 381 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-01-10 02:40:29,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:29,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:29,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805230850] [2022-01-10 02:40:29,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805230850] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:29,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:29,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:29,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664678105] [2022-01-10 02:40:29,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:29,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:29,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:29,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:29,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:29,848 INFO L87 Difference]: Start difference. First operand 11252 states and 14363 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:30,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:30,093 INFO L93 Difference]: Finished difference Result 23330 states and 29994 transitions. [2022-01-10 02:40:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:30,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2022-01-10 02:40:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:30,108 INFO L225 Difference]: With dead ends: 23330 [2022-01-10 02:40:30,108 INFO L226 Difference]: Without dead ends: 12560 [2022-01-10 02:40:30,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:30,118 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 19 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:30,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 258 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:40:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12560 states. [2022-01-10 02:40:30,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12560 to 12464. [2022-01-10 02:40:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12464 states, 12463 states have (on average 1.2525876594720373) internal successors, (15611), 12463 states have internal predecessors, (15611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12464 states to 12464 states and 15611 transitions. [2022-01-10 02:40:30,373 INFO L78 Accepts]: Start accepts. Automaton has 12464 states and 15611 transitions. Word has length 205 [2022-01-10 02:40:30,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:30,373 INFO L470 AbstractCegarLoop]: Abstraction has 12464 states and 15611 transitions. [2022-01-10 02:40:30,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 12464 states and 15611 transitions. [2022-01-10 02:40:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-10 02:40:30,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:30,383 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:30,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-01-10 02:40:30,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:30,584 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:30,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:30,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1305802241, now seen corresponding path program 1 times [2022-01-10 02:40:30,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:30,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217264123] [2022-01-10 02:40:30,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:30,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:30,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:30,586 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:30,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 02:40:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:30,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:30,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 381 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-01-10 02:40:30,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:30,864 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:30,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217264123] [2022-01-10 02:40:30,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217264123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:30,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:30,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:30,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683063920] [2022-01-10 02:40:30,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:30,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:30,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:30,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:30,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:30,866 INFO L87 Difference]: Start difference. First operand 12464 states and 15611 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:31,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:31,108 INFO L93 Difference]: Finished difference Result 25946 states and 32922 transitions. [2022-01-10 02:40:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:31,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2022-01-10 02:40:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:31,125 INFO L225 Difference]: With dead ends: 25946 [2022-01-10 02:40:31,126 INFO L226 Difference]: Without dead ends: 13964 [2022-01-10 02:40:31,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:31,137 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 24 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:31,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 259 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:40:31,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13964 states. [2022-01-10 02:40:31,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13964 to 13820. [2022-01-10 02:40:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13820 states, 13819 states have (on average 1.2304074100875606) internal successors, (17003), 13819 states have internal predecessors, (17003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:31,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13820 states to 13820 states and 17003 transitions. [2022-01-10 02:40:31,409 INFO L78 Accepts]: Start accepts. Automaton has 13820 states and 17003 transitions. Word has length 205 [2022-01-10 02:40:31,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:31,409 INFO L470 AbstractCegarLoop]: Abstraction has 13820 states and 17003 transitions. [2022-01-10 02:40:31,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:31,410 INFO L276 IsEmpty]: Start isEmpty. Operand 13820 states and 17003 transitions. [2022-01-10 02:40:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-10 02:40:31,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:31,419 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:31,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-01-10 02:40:31,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:31,620 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:31,620 INFO L85 PathProgramCache]: Analyzing trace with hash -391223905, now seen corresponding path program 1 times [2022-01-10 02:40:31,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:31,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801062343] [2022-01-10 02:40:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:31,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:31,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:31,622 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:31,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 02:40:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:31,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:31,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 498 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-01-10 02:40:31,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:31,950 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:31,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801062343] [2022-01-10 02:40:31,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801062343] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:31,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:31,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:31,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630617866] [2022-01-10 02:40:31,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:31,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:31,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:31,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:31,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:31,951 INFO L87 Difference]: Start difference. First operand 13820 states and 17003 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:32,225 INFO L93 Difference]: Finished difference Result 39236 states and 48601 transitions. [2022-01-10 02:40:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:32,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-01-10 02:40:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:32,255 INFO L225 Difference]: With dead ends: 39236 [2022-01-10 02:40:32,256 INFO L226 Difference]: Without dead ends: 25898 [2022-01-10 02:40:32,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:32,269 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 123 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:32,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 479 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:40:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25898 states. [2022-01-10 02:40:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25898 to 25896. [2022-01-10 02:40:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25896 states, 25895 states have (on average 1.237960996331338) internal successors, (32057), 25895 states have internal predecessors, (32057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:32,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25896 states to 25896 states and 32057 transitions. [2022-01-10 02:40:32,798 INFO L78 Accepts]: Start accepts. Automaton has 25896 states and 32057 transitions. Word has length 235 [2022-01-10 02:40:32,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:32,798 INFO L470 AbstractCegarLoop]: Abstraction has 25896 states and 32057 transitions. [2022-01-10 02:40:32,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:32,799 INFO L276 IsEmpty]: Start isEmpty. Operand 25896 states and 32057 transitions. [2022-01-10 02:40:32,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-10 02:40:32,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:32,818 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:32,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-01-10 02:40:33,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:33,018 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:33,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:33,019 INFO L85 PathProgramCache]: Analyzing trace with hash -364158303, now seen corresponding path program 1 times [2022-01-10 02:40:33,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:33,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411487683] [2022-01-10 02:40:33,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:33,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:33,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:33,020 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:33,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 02:40:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:33,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:33,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 441 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-01-10 02:40:33,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:33,345 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:33,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411487683] [2022-01-10 02:40:33,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411487683] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:33,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:33,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:33,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701914199] [2022-01-10 02:40:33,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:33,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:33,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:33,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:33,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:33,347 INFO L87 Difference]: Start difference. First operand 25896 states and 32057 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:33,827 INFO L93 Difference]: Finished difference Result 54646 states and 68694 transitions. [2022-01-10 02:40:33,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:33,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-01-10 02:40:33,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:33,867 INFO L225 Difference]: With dead ends: 54646 [2022-01-10 02:40:33,868 INFO L226 Difference]: Without dead ends: 29232 [2022-01-10 02:40:33,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:33,894 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 28 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:33,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 259 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:40:33,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29232 states. [2022-01-10 02:40:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29232 to 29040. [2022-01-10 02:40:34,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29040 states, 29039 states have (on average 1.214676813939874) internal successors, (35273), 29039 states have internal predecessors, (35273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29040 states to 29040 states and 35273 transitions. [2022-01-10 02:40:34,404 INFO L78 Accepts]: Start accepts. Automaton has 29040 states and 35273 transitions. Word has length 235 [2022-01-10 02:40:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:34,404 INFO L470 AbstractCegarLoop]: Abstraction has 29040 states and 35273 transitions. [2022-01-10 02:40:34,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 29040 states and 35273 transitions. [2022-01-10 02:40:34,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-10 02:40:34,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:34,430 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:34,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-01-10 02:40:34,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:34,632 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:34,633 INFO L85 PathProgramCache]: Analyzing trace with hash -660142839, now seen corresponding path program 1 times [2022-01-10 02:40:34,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:34,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222984737] [2022-01-10 02:40:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:34,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:34,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:34,634 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:34,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 02:40:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:34,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:34,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2022-01-10 02:40:35,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:35,007 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:35,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222984737] [2022-01-10 02:40:35,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222984737] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:35,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:35,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:35,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120611116] [2022-01-10 02:40:35,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:35,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:35,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:35,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:35,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:35,009 INFO L87 Difference]: Start difference. First operand 29040 states and 35273 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:35,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:35,525 INFO L93 Difference]: Finished difference Result 59242 states and 72438 transitions. [2022-01-10 02:40:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:35,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2022-01-10 02:40:35,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:35,562 INFO L225 Difference]: With dead ends: 59242 [2022-01-10 02:40:35,562 INFO L226 Difference]: Without dead ends: 30684 [2022-01-10 02:40:35,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:35,582 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 25 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:35,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 258 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:40:35,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30684 states. [2022-01-10 02:40:36,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30684 to 30492. [2022-01-10 02:40:36,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30492 states, 30491 states have (on average 1.2056344495096913) internal successors, (36761), 30491 states have internal predecessors, (36761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30492 states to 30492 states and 36761 transitions. [2022-01-10 02:40:36,189 INFO L78 Accepts]: Start accepts. Automaton has 30492 states and 36761 transitions. Word has length 259 [2022-01-10 02:40:36,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:36,190 INFO L470 AbstractCegarLoop]: Abstraction has 30492 states and 36761 transitions. [2022-01-10 02:40:36,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:36,190 INFO L276 IsEmpty]: Start isEmpty. Operand 30492 states and 36761 transitions. [2022-01-10 02:40:36,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-10 02:40:36,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:36,226 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:36,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-01-10 02:40:36,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:36,435 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:36,435 INFO L85 PathProgramCache]: Analyzing trace with hash 366959076, now seen corresponding path program 1 times [2022-01-10 02:40:36,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:36,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095494200] [2022-01-10 02:40:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:36,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:36,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:36,437 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:36,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 02:40:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:36,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:36,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2022-01-10 02:40:36,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:36,804 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:36,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095494200] [2022-01-10 02:40:36,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095494200] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:36,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:36,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:36,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660284562] [2022-01-10 02:40:36,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:36,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:36,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:36,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:36,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:36,805 INFO L87 Difference]: Start difference. First operand 30492 states and 36761 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:37,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:37,365 INFO L93 Difference]: Finished difference Result 63982 states and 78438 transitions. [2022-01-10 02:40:37,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:37,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2022-01-10 02:40:37,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:37,409 INFO L225 Difference]: With dead ends: 63982 [2022-01-10 02:40:37,410 INFO L226 Difference]: Without dead ends: 33972 [2022-01-10 02:40:37,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:37,434 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 30 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:37,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 254 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:40:37,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33972 states. [2022-01-10 02:40:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33972 to 33780. [2022-01-10 02:40:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33780 states, 33779 states have (on average 1.1877497853696084) internal successors, (40121), 33779 states have internal predecessors, (40121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:38,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33780 states to 33780 states and 40121 transitions. [2022-01-10 02:40:38,371 INFO L78 Accepts]: Start accepts. Automaton has 33780 states and 40121 transitions. Word has length 270 [2022-01-10 02:40:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:38,371 INFO L470 AbstractCegarLoop]: Abstraction has 33780 states and 40121 transitions. [2022-01-10 02:40:38,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 33780 states and 40121 transitions. [2022-01-10 02:40:38,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-01-10 02:40:38,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:38,391 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 9, 9, 8, 8, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:38,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-01-10 02:40:38,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:38,591 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:38,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:38,592 INFO L85 PathProgramCache]: Analyzing trace with hash 102897687, now seen corresponding path program 1 times [2022-01-10 02:40:38,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:38,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213989449] [2022-01-10 02:40:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:38,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:38,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:38,593 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:38,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 02:40:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:38,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:40:38,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 429 proven. 25 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2022-01-10 02:40:39,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 428 proven. 26 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2022-01-10 02:40:39,621 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:39,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213989449] [2022-01-10 02:40:39,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213989449] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:39,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:39,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-10 02:40:39,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574630162] [2022-01-10 02:40:39,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:39,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 02:40:39,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:39,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 02:40:39,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:40:39,623 INFO L87 Difference]: Start difference. First operand 33780 states and 40121 transitions. Second operand has 11 states, 11 states have (on average 18.0) internal successors, (198), 11 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:40,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:40,953 INFO L93 Difference]: Finished difference Result 73409 states and 89937 transitions. [2022-01-10 02:40:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 02:40:40,954 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 18.0) internal successors, (198), 11 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 309 [2022-01-10 02:40:40,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:41,014 INFO L225 Difference]: With dead ends: 73409 [2022-01-10 02:40:41,015 INFO L226 Difference]: Without dead ends: 51898 [2022-01-10 02:40:41,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2022-01-10 02:40:41,030 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 1139 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:41,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1139 Valid, 1252 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 02:40:41,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51898 states. [2022-01-10 02:40:41,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51898 to 25344. [2022-01-10 02:40:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25344 states, 25343 states have (on average 1.1594917728761394) internal successors, (29385), 25343 states have internal predecessors, (29385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25344 states to 25344 states and 29385 transitions. [2022-01-10 02:40:41,674 INFO L78 Accepts]: Start accepts. Automaton has 25344 states and 29385 transitions. Word has length 309 [2022-01-10 02:40:41,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:41,674 INFO L470 AbstractCegarLoop]: Abstraction has 25344 states and 29385 transitions. [2022-01-10 02:40:41,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.0) internal successors, (198), 11 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:41,674 INFO L276 IsEmpty]: Start isEmpty. Operand 25344 states and 29385 transitions. [2022-01-10 02:40:41,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-01-10 02:40:41,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:41,689 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 13, 13, 11, 11, 9, 9, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:41,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-01-10 02:40:41,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:41,889 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:41,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:41,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2037361951, now seen corresponding path program 1 times [2022-01-10 02:40:41,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:41,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385380904] [2022-01-10 02:40:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:41,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:41,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:41,891 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:41,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 02:40:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:41,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:40:41,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 790 proven. 12 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2022-01-10 02:40:42,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 790 proven. 12 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2022-01-10 02:40:42,816 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:42,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385380904] [2022-01-10 02:40:42,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385380904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:42,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:42,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:40:42,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373789434] [2022-01-10 02:40:42,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:42,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:40:42,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:40:42,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:40:42,818 INFO L87 Difference]: Start difference. First operand 25344 states and 29385 transitions. Second operand has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:43,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:43,658 INFO L93 Difference]: Finished difference Result 56616 states and 65685 transitions. [2022-01-10 02:40:43,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:40:43,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 344 [2022-01-10 02:40:43,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:43,692 INFO L225 Difference]: With dead ends: 56616 [2022-01-10 02:40:43,693 INFO L226 Difference]: Without dead ends: 31442 [2022-01-10 02:40:43,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 685 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:40:43,704 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 427 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:43,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 685 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:40:43,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31442 states. [2022-01-10 02:40:44,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31442 to 26796. [2022-01-10 02:40:44,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26796 states, 26795 states have (on average 1.1413696585183803) internal successors, (30583), 26795 states have internal predecessors, (30583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26796 states to 26796 states and 30583 transitions. [2022-01-10 02:40:44,232 INFO L78 Accepts]: Start accepts. Automaton has 26796 states and 30583 transitions. Word has length 344 [2022-01-10 02:40:44,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:44,232 INFO L470 AbstractCegarLoop]: Abstraction has 26796 states and 30583 transitions. [2022-01-10 02:40:44,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 26796 states and 30583 transitions. [2022-01-10 02:40:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2022-01-10 02:40:44,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:44,251 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 14, 14, 12, 12, 10, 10, 8, 8, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:44,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-01-10 02:40:44,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:44,451 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash -2003157516, now seen corresponding path program 1 times [2022-01-10 02:40:44,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:44,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303259653] [2022-01-10 02:40:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:44,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:44,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:44,453 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:44,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-01-10 02:40:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:44,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:40:44,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1847 backedges. 802 proven. 0 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2022-01-10 02:40:44,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:44,998 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:44,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303259653] [2022-01-10 02:40:44,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303259653] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:44,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:44,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:40:44,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613684492] [2022-01-10 02:40:44,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:44,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:40:44,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:45,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:40:45,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:45,001 INFO L87 Difference]: Start difference. First operand 26796 states and 30583 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:45,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:45,394 INFO L93 Difference]: Finished difference Result 48585 states and 56090 transitions. [2022-01-10 02:40:45,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:40:45,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 396 [2022-01-10 02:40:45,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:45,407 INFO L225 Difference]: With dead ends: 48585 [2022-01-10 02:40:45,407 INFO L226 Difference]: Without dead ends: 12527 [2022-01-10 02:40:45,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:40:45,425 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 35 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:45,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 260 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:40:45,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12527 states. [2022-01-10 02:40:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12527 to 12527. [2022-01-10 02:40:45,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12527 states, 12526 states have (on average 1.134041194315823) internal successors, (14205), 12526 states have internal predecessors, (14205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:45,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12527 states to 12527 states and 14205 transitions. [2022-01-10 02:40:45,716 INFO L78 Accepts]: Start accepts. Automaton has 12527 states and 14205 transitions. Word has length 396 [2022-01-10 02:40:45,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:45,716 INFO L470 AbstractCegarLoop]: Abstraction has 12527 states and 14205 transitions. [2022-01-10 02:40:45,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:45,717 INFO L276 IsEmpty]: Start isEmpty. Operand 12527 states and 14205 transitions. [2022-01-10 02:40:45,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2022-01-10 02:40:45,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:45,726 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 19, 19, 18, 17, 16, 16, 15, 15, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:45,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-01-10 02:40:45,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:45,927 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:45,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:45,927 INFO L85 PathProgramCache]: Analyzing trace with hash 630701952, now seen corresponding path program 1 times [2022-01-10 02:40:45,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:45,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413563040] [2022-01-10 02:40:45,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:45,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:45,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:45,930 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:45,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-01-10 02:40:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:46,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:40:46,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3942 backedges. 2057 proven. 14 refuted. 0 times theorem prover too weak. 1871 trivial. 0 not checked. [2022-01-10 02:40:46,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3942 backedges. 2057 proven. 14 refuted. 0 times theorem prover too weak. 1871 trivial. 0 not checked. [2022-01-10 02:40:47,507 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:47,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413563040] [2022-01-10 02:40:47,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413563040] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:47,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:47,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:40:47,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193390965] [2022-01-10 02:40:47,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:47,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:40:47,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:47,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:40:47,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:40:47,509 INFO L87 Difference]: Start difference. First operand 12527 states and 14205 transitions. Second operand has 6 states, 6 states have (on average 44.833333333333336) internal successors, (269), 6 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:47,742 INFO L93 Difference]: Finished difference Result 13397 states and 15225 transitions. [2022-01-10 02:40:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:40:47,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.833333333333336) internal successors, (269), 6 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 606 [2022-01-10 02:40:47,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:47,744 INFO L225 Difference]: With dead ends: 13397 [2022-01-10 02:40:47,744 INFO L226 Difference]: Without dead ends: 0 [2022-01-10 02:40:47,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1214 GetRequests, 1208 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:40:47,750 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 116 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:47,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 270 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:40:47,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-10 02:40:47,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-10 02:40:47,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-10 02:40:47,751 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 606 [2022-01-10 02:40:47,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:47,751 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-10 02:40:47,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.833333333333336) internal successors, (269), 6 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:40:47,751 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-10 02:40:47,751 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-10 02:40:47,754 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-10 02:40:47,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-01-10 02:40:47,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:47,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-10 02:40:59,726 WARN L228 SmtUtils]: Spent 11.74s on a formula simplification. DAG size of input: 1236 DAG size of output: 1236 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)