/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:36:13,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:36:13,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:36:13,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:36:13,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:36:13,224 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:36:13,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:36:13,224 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:36:13,224 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:36:13,225 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:36:13,225 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:36:13,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:36:13,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:36:13,225 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:36:13,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:36:13,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:36:13,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:36:13,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:36:13,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:36:13,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:36:13,226 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:36:13,226 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:36:13,226 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:36:13,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:36:13,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:36:13,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:36:13,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:36:13,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:36:13,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:36:13,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:36:13,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:36:13,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:36:13,228 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:36:13,228 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:36:13,228 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:36:13,229 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:36:13,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:36:13,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:36:13,229 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:36:13,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:36:13,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:36:13,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:36:13,406 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:36:13,407 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:36:13,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2022-01-10 06:36:13,443 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/032d73796/74fe890dafc3482ea4140f66957d8f6d/FLAG625a17b11 [2022-01-10 06:36:13,759 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:36:13,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c [2022-01-10 06:36:13,766 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/032d73796/74fe890dafc3482ea4140f66957d8f6d/FLAG625a17b11 [2022-01-10 06:36:14,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/032d73796/74fe890dafc3482ea4140f66957d8f6d [2022-01-10 06:36:14,187 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:36:14,188 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:36:14,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:36:14,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:36:14,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:36:14,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:36:14" (1/1) ... [2022-01-10 06:36:14,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39443212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:14, skipping insertion in model container [2022-01-10 06:36:14,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:36:14" (1/1) ... [2022-01-10 06:36:14,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:36:14,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:36:14,365 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c[1234,1247] [2022-01-10 06:36:14,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:36:14,374 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:36:14,387 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c[1234,1247] [2022-01-10 06:36:14,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:36:14,397 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:36:14,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:14 WrapperNode [2022-01-10 06:36:14,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:36:14,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:36:14,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:36:14,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:36:14,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:14" (1/1) ... [2022-01-10 06:36:14,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:14" (1/1) ... [2022-01-10 06:36:14,417 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2022-01-10 06:36:14,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:36:14,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:36:14,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:36:14,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:36:14,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:14" (1/1) ... [2022-01-10 06:36:14,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:14" (1/1) ... [2022-01-10 06:36:14,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:14" (1/1) ... [2022-01-10 06:36:14,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:14" (1/1) ... [2022-01-10 06:36:14,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:14" (1/1) ... [2022-01-10 06:36:14,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:14" (1/1) ... [2022-01-10 06:36:14,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:14" (1/1) ... [2022-01-10 06:36:14,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:36:14,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:36:14,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:36:14,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:36:14,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:14" (1/1) ... [2022-01-10 06:36:14,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:36:14,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:36:14,517 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 06:36:14,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 06:36:14,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:36:14,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:36:14,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:36:14,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:36:14,554 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-01-10 06:36:14,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-01-10 06:36:14,599 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:36:14,600 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:36:14,683 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:36:14,687 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:36:14,687 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 06:36:14,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:36:14 BoogieIcfgContainer [2022-01-10 06:36:14,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:36:14,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:36:14,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:36:14,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:36:14,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:36:14" (1/3) ... [2022-01-10 06:36:14,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d595566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:36:14, skipping insertion in model container [2022-01-10 06:36:14,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:14" (2/3) ... [2022-01-10 06:36:14,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d595566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:36:14, skipping insertion in model container [2022-01-10 06:36:14,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:36:14" (3/3) ... [2022-01-10 06:36:14,693 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2022-01-10 06:36:14,696 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:36:14,696 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:36:14,722 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:36:14,726 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 06:36:14,726 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:36:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 06:36:14,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 06:36:14,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:14,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:14,738 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:14,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash -273059606, now seen corresponding path program 1 times [2022-01-10 06:36:14,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:14,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586922352] [2022-01-10 06:36:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:14,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:14,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:14,749 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:14,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:36:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:14,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:36:14,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:36:15,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:36:15,011 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:15,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586922352] [2022-01-10 06:36:15,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586922352] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:36:15,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:36:15,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:36:15,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805180518] [2022-01-10 06:36:15,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:36:15,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:36:15,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:15,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:36:15,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:36:15,042 INFO L87 Difference]: Start difference. First operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:36:15,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:15,191 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-01-10 06:36:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:36:15,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-10 06:36:15,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:15,199 INFO L225 Difference]: With dead ends: 37 [2022-01-10 06:36:15,199 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 06:36:15,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:36:15,204 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:15,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 80 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:15,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 06:36:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 06:36:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-10 06:36:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-01-10 06:36:15,232 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 12 [2022-01-10 06:36:15,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:15,232 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-01-10 06:36:15,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:36:15,233 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-01-10 06:36:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 06:36:15,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:15,234 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:15,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:15,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:15,459 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:15,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:15,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1399945439, now seen corresponding path program 1 times [2022-01-10 06:36:15,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:15,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459929548] [2022-01-10 06:36:15,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:15,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:15,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:15,463 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:15,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:36:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:15,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:36:15,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:36:15,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:36:15,771 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:15,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459929548] [2022-01-10 06:36:15,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459929548] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:36:15,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:36:15,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-01-10 06:36:15,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884690405] [2022-01-10 06:36:15,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:36:15,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:36:15,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:15,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:36:15,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:36:15,774 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:36:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:15,906 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-01-10 06:36:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:36:15,907 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-01-10 06:36:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:15,908 INFO L225 Difference]: With dead ends: 28 [2022-01-10 06:36:15,908 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 06:36:15,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:36:15,909 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:15,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 72 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:15,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 06:36:15,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-01-10 06:36:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-10 06:36:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-01-10 06:36:15,914 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 19 [2022-01-10 06:36:15,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:15,915 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-01-10 06:36:15,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:36:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-01-10 06:36:15,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 06:36:15,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:15,916 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:15,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:16,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:16,122 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:16,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:16,123 INFO L85 PathProgramCache]: Analyzing trace with hash 443445034, now seen corresponding path program 1 times [2022-01-10 06:36:16,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:16,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101011089] [2022-01-10 06:36:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:16,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:16,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:16,125 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:16,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:36:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:16,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:36:16,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:36:16,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:36:16,192 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:16,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101011089] [2022-01-10 06:36:16,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101011089] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:36:16,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:36:16,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:36:16,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750459470] [2022-01-10 06:36:16,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:36:16,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:36:16,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:16,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:36:16,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:36:16,194 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:36:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:16,233 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2022-01-10 06:36:16,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:36:16,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2022-01-10 06:36:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:16,235 INFO L225 Difference]: With dead ends: 41 [2022-01-10 06:36:16,235 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 06:36:16,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:36:16,236 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:16,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 46 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:36:16,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 06:36:16,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-10 06:36:16,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 06:36:16,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-01-10 06:36:16,241 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 24 [2022-01-10 06:36:16,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:16,241 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-01-10 06:36:16,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:36:16,242 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-01-10 06:36:16,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 06:36:16,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:16,243 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:16,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 06:36:16,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:16,449 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:16,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:16,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2066647333, now seen corresponding path program 1 times [2022-01-10 06:36:16,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:16,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576745786] [2022-01-10 06:36:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:16,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:16,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:16,452 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:16,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:36:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:16,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:36:16,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 06:36:16,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 06:36:17,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:17,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576745786] [2022-01-10 06:36:17,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576745786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:17,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:17,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2022-01-10 06:36:17,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496188889] [2022-01-10 06:36:17,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:17,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 06:36:17,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:17,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 06:36:17,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-01-10 06:36:17,161 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (5), 1 states have call predecessors, (5), 7 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:36:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:18,187 INFO L93 Difference]: Finished difference Result 63 states and 115 transitions. [2022-01-10 06:36:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-10 06:36:18,187 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.5) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (5), 1 states have call predecessors, (5), 7 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) Word has length 31 [2022-01-10 06:36:18,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:18,190 INFO L225 Difference]: With dead ends: 63 [2022-01-10 06:36:18,190 INFO L226 Difference]: Without dead ends: 57 [2022-01-10 06:36:18,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=350, Invalid=1812, Unknown=0, NotChecked=0, Total=2162 [2022-01-10 06:36:18,192 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:18,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 178 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:36:18,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-10 06:36:18,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2022-01-10 06:36:18,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (31), 10 states have call predecessors, (31), 6 states have call successors, (31) [2022-01-10 06:36:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 61 transitions. [2022-01-10 06:36:18,209 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 61 transitions. Word has length 31 [2022-01-10 06:36:18,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:18,209 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 61 transitions. [2022-01-10 06:36:18,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.5) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (5), 1 states have call predecessors, (5), 7 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:36:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 61 transitions. [2022-01-10 06:36:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 06:36:18,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:18,211 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:18,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 06:36:18,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:18,417 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:18,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:18,418 INFO L85 PathProgramCache]: Analyzing trace with hash -690146316, now seen corresponding path program 2 times [2022-01-10 06:36:18,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:18,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528755903] [2022-01-10 06:36:18,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:36:18,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:18,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:18,419 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:18,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:36:18,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:36:18,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:18,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:36:18,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 06:36:18,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 06:36:19,261 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:19,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528755903] [2022-01-10 06:36:19,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528755903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:19,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:19,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2022-01-10 06:36:19,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580439659] [2022-01-10 06:36:19,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:19,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 06:36:19,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:19,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 06:36:19,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:36:19,263 INFO L87 Difference]: Start difference. First operand 35 states and 61 transitions. Second operand has 24 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (5), 1 states have call predecessors, (5), 7 states have return successors, (10), 10 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:36:20,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:20,436 INFO L93 Difference]: Finished difference Result 83 states and 167 transitions. [2022-01-10 06:36:20,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-10 06:36:20,436 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (5), 1 states have call predecessors, (5), 7 states have return successors, (10), 10 states have call predecessors, (10), 3 states have call successors, (10) Word has length 38 [2022-01-10 06:36:20,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:20,438 INFO L225 Difference]: With dead ends: 83 [2022-01-10 06:36:20,438 INFO L226 Difference]: Without dead ends: 77 [2022-01-10 06:36:20,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=359, Invalid=1993, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 06:36:20,440 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:20,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 198 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:36:20,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-10 06:36:20,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 34. [2022-01-10 06:36:20,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (25), 11 states have call predecessors, (25), 6 states have call successors, (25) [2022-01-10 06:36:20,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 55 transitions. [2022-01-10 06:36:20,451 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 55 transitions. Word has length 38 [2022-01-10 06:36:20,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:20,451 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 55 transitions. [2022-01-10 06:36:20,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (5), 1 states have call predecessors, (5), 7 states have return successors, (10), 10 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:36:20,451 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 55 transitions. [2022-01-10 06:36:20,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 06:36:20,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:20,452 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:20,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:20,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:20,659 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:20,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:20,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1075114636, now seen corresponding path program 3 times [2022-01-10 06:36:20,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:20,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096713011] [2022-01-10 06:36:20,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:36:20,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:20,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:20,661 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:20,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:36:20,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 06:36:20,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:20,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:36:20,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 32 proven. 17 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-10 06:36:20,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-10 06:36:21,372 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:21,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096713011] [2022-01-10 06:36:21,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096713011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:21,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:21,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2022-01-10 06:36:21,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803698355] [2022-01-10 06:36:21,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:21,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 06:36:21,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:21,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 06:36:21,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:36:21,374 INFO L87 Difference]: Start difference. First operand 34 states and 55 transitions. Second operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 14 states have internal predecessors, (35), 3 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 06:36:22,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:22,907 INFO L93 Difference]: Finished difference Result 116 states and 252 transitions. [2022-01-10 06:36:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-10 06:36:22,907 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 14 states have internal predecessors, (35), 3 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) Word has length 50 [2022-01-10 06:36:22,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:22,909 INFO L225 Difference]: With dead ends: 116 [2022-01-10 06:36:22,910 INFO L226 Difference]: Without dead ends: 110 [2022-01-10 06:36:22,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=573, Invalid=3087, Unknown=0, NotChecked=0, Total=3660 [2022-01-10 06:36:22,912 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:22,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 190 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 06:36:22,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-10 06:36:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 50. [2022-01-10 06:36:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 32 states have (on average 1.0625) internal successors, (34), 29 states have internal predecessors, (34), 8 states have call successors, (8), 1 states have call predecessors, (8), 9 states have return successors, (64), 19 states have call predecessors, (64), 8 states have call successors, (64) [2022-01-10 06:36:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 106 transitions. [2022-01-10 06:36:22,934 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 106 transitions. Word has length 50 [2022-01-10 06:36:22,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:22,934 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 106 transitions. [2022-01-10 06:36:22,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 14 states have internal predecessors, (35), 3 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 06:36:22,934 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 106 transitions. [2022-01-10 06:36:22,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 06:36:22,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:22,936 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:22,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:23,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:23,137 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:23,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:23,137 INFO L85 PathProgramCache]: Analyzing trace with hash -416324649, now seen corresponding path program 4 times [2022-01-10 06:36:23,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:23,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765458867] [2022-01-10 06:36:23,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:36:23,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:23,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:23,152 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:23,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:36:23,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:36:23,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:23,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:36:23,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 38 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-10 06:36:23,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 38 proven. 23 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-10 06:36:23,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:23,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765458867] [2022-01-10 06:36:23,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765458867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:23,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:23,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2022-01-10 06:36:23,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116626841] [2022-01-10 06:36:23,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:23,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:36:23,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:23,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:36:23,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:36:23,586 INFO L87 Difference]: Start difference. First operand 50 states and 106 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-10 06:36:23,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:23,662 INFO L93 Difference]: Finished difference Result 135 states and 490 transitions. [2022-01-10 06:36:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:36:23,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 57 [2022-01-10 06:36:23,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:23,665 INFO L225 Difference]: With dead ends: 135 [2022-01-10 06:36:23,665 INFO L226 Difference]: Without dead ends: 90 [2022-01-10 06:36:23,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:36:23,667 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:23,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 59 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:23,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-10 06:36:23,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-01-10 06:36:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 57 states have internal predecessors, (58), 12 states have call successors, (12), 2 states have call predecessors, (12), 22 states have return successors, (223), 30 states have call predecessors, (223), 12 states have call successors, (223) [2022-01-10 06:36:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 293 transitions. [2022-01-10 06:36:23,681 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 293 transitions. Word has length 57 [2022-01-10 06:36:23,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:23,682 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 293 transitions. [2022-01-10 06:36:23,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-10 06:36:23,682 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 293 transitions. [2022-01-10 06:36:23,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-10 06:36:23,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:23,685 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:23,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-01-10 06:36:23,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:23,892 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash -778844721, now seen corresponding path program 5 times [2022-01-10 06:36:23,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:23,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133006864] [2022-01-10 06:36:23,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:36:23,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:23,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:23,896 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:23,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:36:23,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-10 06:36:23,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:23,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 06:36:23,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 50 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-01-10 06:36:24,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-10 06:36:25,481 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:25,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133006864] [2022-01-10 06:36:25,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133006864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:25,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:25,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 38 [2022-01-10 06:36:25,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876273062] [2022-01-10 06:36:25,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:25,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-10 06:36:25,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:25,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-10 06:36:25,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 06:36:25,483 INFO L87 Difference]: Start difference. First operand 90 states and 293 transitions. Second operand has 38 states, 32 states have (on average 1.375) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (9), 1 states have call predecessors, (9), 13 states have return successors, (16), 16 states have call predecessors, (16), 7 states have call successors, (16) [2022-01-10 06:36:35,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:35,077 INFO L93 Difference]: Finished difference Result 552 states and 2463 transitions. [2022-01-10 06:36:35,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2022-01-10 06:36:35,079 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 1.375) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (9), 1 states have call predecessors, (9), 13 states have return successors, (16), 16 states have call predecessors, (16), 7 states have call successors, (16) Word has length 55 [2022-01-10 06:36:35,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:35,093 INFO L225 Difference]: With dead ends: 552 [2022-01-10 06:36:35,094 INFO L226 Difference]: Without dead ends: 546 [2022-01-10 06:36:35,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14674 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=6362, Invalid=38794, Unknown=0, NotChecked=0, Total=45156 [2022-01-10 06:36:35,106 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 38 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 3460 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 3850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 3460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:35,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 345 Invalid, 3850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 3460 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-10 06:36:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-10 06:36:35,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 154. [2022-01-10 06:36:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 93 states have (on average 1.032258064516129) internal successors, (96), 95 states have internal predecessors, (96), 19 states have call successors, (19), 2 states have call predecessors, (19), 41 states have return successors, (706), 56 states have call predecessors, (706), 19 states have call successors, (706) [2022-01-10 06:36:35,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 821 transitions. [2022-01-10 06:36:35,237 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 821 transitions. Word has length 55 [2022-01-10 06:36:35,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:35,238 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 821 transitions. [2022-01-10 06:36:35,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 1.375) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (9), 1 states have call predecessors, (9), 13 states have return successors, (16), 16 states have call predecessors, (16), 7 states have call successors, (16) [2022-01-10 06:36:35,238 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 821 transitions. [2022-01-10 06:36:35,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 06:36:35,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:35,244 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:35,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:35,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:35,453 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:35,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:35,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1904496062, now seen corresponding path program 6 times [2022-01-10 06:36:35,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:35,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124440714] [2022-01-10 06:36:35,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:36:35,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:35,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:35,455 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:35,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:36:35,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-10 06:36:35,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:35,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:36:35,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 76 proven. 20 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-10 06:36:35,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 76 proven. 23 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-10 06:36:35,885 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:35,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124440714] [2022-01-10 06:36:35,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124440714] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:35,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:35,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2022-01-10 06:36:35,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086236316] [2022-01-10 06:36:35,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:35,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 06:36:35,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:35,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 06:36:35,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:36:35,886 INFO L87 Difference]: Start difference. First operand 154 states and 821 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 5 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-10 06:36:35,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:35,956 INFO L93 Difference]: Finished difference Result 297 states and 2515 transitions. [2022-01-10 06:36:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:36:35,971 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 5 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 64 [2022-01-10 06:36:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:35,975 INFO L225 Difference]: With dead ends: 297 [2022-01-10 06:36:35,975 INFO L226 Difference]: Without dead ends: 148 [2022-01-10 06:36:35,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:36:35,980 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:35,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 72 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:36:35,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-10 06:36:36,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 80. [2022-01-10 06:36:36,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 50 states have internal predecessors, (52), 12 states have call successors, (12), 3 states have call predecessors, (12), 18 states have return successors, (176), 26 states have call predecessors, (176), 12 states have call successors, (176) [2022-01-10 06:36:36,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 240 transitions. [2022-01-10 06:36:36,026 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 240 transitions. Word has length 64 [2022-01-10 06:36:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:36,026 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 240 transitions. [2022-01-10 06:36:36,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 5 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-10 06:36:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 240 transitions. [2022-01-10 06:36:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-10 06:36:36,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:36,031 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:36,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-01-10 06:36:36,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:36,232 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:36,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash -177912382, now seen corresponding path program 7 times [2022-01-10 06:36:36,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:36,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616680053] [2022-01-10 06:36:36,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:36:36,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:36,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:36,237 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:36,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:36:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:36,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 06:36:36,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 158 proven. 81 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-01-10 06:36:36,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 170 proven. 87 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2022-01-10 06:36:38,350 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:38,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616680053] [2022-01-10 06:36:38,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616680053] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:38,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:38,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24] total 40 [2022-01-10 06:36:38,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232981205] [2022-01-10 06:36:38,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:38,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-10 06:36:38,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:38,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-10 06:36:38,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2022-01-10 06:36:38,352 INFO L87 Difference]: Start difference. First operand 80 states and 240 transitions. Second operand has 40 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (23), 19 states have call predecessors, (23), 7 states have call successors, (23) [2022-01-10 06:36:44,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:44,261 INFO L93 Difference]: Finished difference Result 353 states and 1476 transitions. [2022-01-10 06:36:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-10 06:36:44,261 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (23), 19 states have call predecessors, (23), 7 states have call successors, (23) Word has length 100 [2022-01-10 06:36:44,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:44,297 INFO L225 Difference]: With dead ends: 353 [2022-01-10 06:36:44,297 INFO L226 Difference]: Without dead ends: 347 [2022-01-10 06:36:44,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6308 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3322, Invalid=19328, Unknown=0, NotChecked=0, Total=22650 [2022-01-10 06:36:44,303 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 44 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 2641 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 2641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:44,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 333 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 2641 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-10 06:36:44,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-01-10 06:36:44,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 74. [2022-01-10 06:36:44,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 46 states have internal predecessors, (48), 12 states have call successors, (12), 3 states have call predecessors, (12), 16 states have return successors, (155), 24 states have call predecessors, (155), 12 states have call successors, (155) [2022-01-10 06:36:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 215 transitions. [2022-01-10 06:36:44,413 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 215 transitions. Word has length 100 [2022-01-10 06:36:44,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:44,428 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 215 transitions. [2022-01-10 06:36:44,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (23), 19 states have call predecessors, (23), 7 states have call successors, (23) [2022-01-10 06:36:44,428 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 215 transitions. [2022-01-10 06:36:44,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 06:36:44,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:44,430 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:44,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:44,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:44,638 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:44,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:44,639 INFO L85 PathProgramCache]: Analyzing trace with hash -436788809, now seen corresponding path program 8 times [2022-01-10 06:36:44,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:44,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120960417] [2022-01-10 06:36:44,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:36:44,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:44,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:44,640 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:44,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:36:44,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:36:44,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:44,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-10 06:36:44,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 64 proven. 226 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-01-10 06:36:45,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 80 proven. 294 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-01-10 06:36:49,062 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:49,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120960417] [2022-01-10 06:36:49,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120960417] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:49,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:49,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 43] total 70 [2022-01-10 06:36:49,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141204557] [2022-01-10 06:36:49,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:49,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-10 06:36:49,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:49,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-10 06:36:49,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=4440, Unknown=0, NotChecked=0, Total=4830 [2022-01-10 06:36:49,065 INFO L87 Difference]: Start difference. First operand 74 states and 215 transitions. Second operand has 70 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 38 states have internal predecessors, (72), 15 states have call successors, (17), 1 states have call predecessors, (17), 25 states have return successors, (32), 32 states have call predecessors, (32), 15 states have call successors, (32)