/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:37:32,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:37:32,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:37:32,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:37:32,684 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 06:37:32,703 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:37:32,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:37:32,704 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:37:32,704 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:37:32,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:37:32,705 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:37:32,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:37:32,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:37:32,705 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:37:32,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:37:32,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:37:32,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:37:32,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:37:32,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:37:32,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:37:32,707 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:37:32,707 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:37:32,707 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:37:32,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:37:32,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:37:32,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:37:32,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:37:32,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:37:32,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:37:32,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:37:32,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:37:32,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:37:32,708 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:37:32,708 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:37:32,708 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:37:32,708 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:37:32,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:37:32,708 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:37:32,708 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:37:32,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:37:32,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:37:32,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:37:32,885 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:37:32,886 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:37:32,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_20-1.c [2022-01-10 06:37:32,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc4e51b9c/e6a9c485fcd34fe6a7e79f8f60536eaf/FLAG242e46b27 [2022-01-10 06:37:33,283 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:37:33,284 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_20-1.c [2022-01-10 06:37:33,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc4e51b9c/e6a9c485fcd34fe6a7e79f8f60536eaf/FLAG242e46b27 [2022-01-10 06:37:33,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc4e51b9c/e6a9c485fcd34fe6a7e79f8f60536eaf [2022-01-10 06:37:33,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:37:33,297 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:37:33,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:37:33,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:37:33,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:37:33,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:37:33" (1/1) ... [2022-01-10 06:37:33,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5113e358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:33, skipping insertion in model container [2022-01-10 06:37:33,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:37:33" (1/1) ... [2022-01-10 06:37:33,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:37:33,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:37:33,413 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_20-1.c[745,758] [2022-01-10 06:37:33,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:37:33,424 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:37:33,441 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_20-1.c[745,758] [2022-01-10 06:37:33,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:37:33,468 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:37:33,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:33 WrapperNode [2022-01-10 06:37:33,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:37:33,470 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:37:33,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:37:33,470 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:37:33,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:33" (1/1) ... [2022-01-10 06:37:33,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:33" (1/1) ... [2022-01-10 06:37:33,504 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 06:37:33,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:37:33,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:37:33,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:37:33,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:37:33,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:33" (1/1) ... [2022-01-10 06:37:33,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:33" (1/1) ... [2022-01-10 06:37:33,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:33" (1/1) ... [2022-01-10 06:37:33,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:33" (1/1) ... [2022-01-10 06:37:33,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:33" (1/1) ... [2022-01-10 06:37:33,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:33" (1/1) ... [2022-01-10 06:37:33,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:33" (1/1) ... [2022-01-10 06:37:33,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:37:33,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:37:33,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:37:33,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:37:33,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:33" (1/1) ... [2022-01-10 06:37:33,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:37:33,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:37:33,550 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 06:37:33,562 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 06:37:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:37:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:37:33,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:37:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:37:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-10 06:37:33,572 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-10 06:37:33,616 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:37:33,617 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:37:33,675 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:37:33,678 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:37:33,679 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 06:37:33,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:37:33 BoogieIcfgContainer [2022-01-10 06:37:33,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:37:33,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:37:33,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:37:33,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:37:33,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:37:33" (1/3) ... [2022-01-10 06:37:33,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5de0c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:37:33, skipping insertion in model container [2022-01-10 06:37:33,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:33" (2/3) ... [2022-01-10 06:37:33,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5de0c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:37:33, skipping insertion in model container [2022-01-10 06:37:33,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:37:33" (3/3) ... [2022-01-10 06:37:33,685 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_20-1.c [2022-01-10 06:37:33,688 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:37:33,688 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:37:33,716 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:37:33,720 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 06:37:33,720 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:37:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:37:33,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 06:37:33,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:33,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:33,736 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:33,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:33,742 INFO L85 PathProgramCache]: Analyzing trace with hash 795692101, now seen corresponding path program 1 times [2022-01-10 06:37:33,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:33,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2915474] [2022-01-10 06:37:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:33,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:33,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:33,752 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 06:37:33,753 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 06:37:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:33,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:37:33,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:33,897 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 06:37:33,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:37:33,897 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:33,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2915474] [2022-01-10 06:37:33,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2915474] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:37:33,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:37:33,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:37:33,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335791853] [2022-01-10 06:37:33,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:37:33,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:37:33,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:33,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:37:33,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:37:33,924 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:37:33,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:33,975 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-01-10 06:37:33,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:37:33,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 06:37:33,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:33,984 INFO L225 Difference]: With dead ends: 29 [2022-01-10 06:37:33,984 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 06:37:33,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:37:33,988 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:33,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:37:34,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 06:37:34,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 06:37:34,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:37:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 06:37:34,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-10 06:37:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:34,016 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 06:37:34,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:37:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 06:37:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 06:37:34,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:34,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:34,023 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 06:37:34,223 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 06:37:34,223 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:34,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:34,224 INFO L85 PathProgramCache]: Analyzing trace with hash -360006549, now seen corresponding path program 1 times [2022-01-10 06:37:34,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:34,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086115637] [2022-01-10 06:37:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:34,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:34,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:34,227 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 06:37:34,228 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 06:37:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:34,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:37:34,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:34,290 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 06:37:34,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:37:34,290 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:34,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086115637] [2022-01-10 06:37:34,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086115637] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:37:34,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:37:34,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:37:34,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407154280] [2022-01-10 06:37:34,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:37:34,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:37:34,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:34,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:37:34,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:37:34,293 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:37:34,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:34,330 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-10 06:37:34,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:37:34,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-10 06:37:34,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:34,332 INFO L225 Difference]: With dead ends: 23 [2022-01-10 06:37:34,332 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 06:37:34,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:37:34,333 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:34,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:37:34,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 06:37:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-10 06:37:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:37:34,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 06:37:34,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-10 06:37:34,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:34,338 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 06:37:34,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:37:34,338 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 06:37:34,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 06:37:34,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:34,339 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:34,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 06:37:34,550 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 06:37:34,551 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:34,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:34,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1663150085, now seen corresponding path program 1 times [2022-01-10 06:37:34,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:34,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93738626] [2022-01-10 06:37:34,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:34,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:34,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:34,553 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 06:37:34,554 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 06:37:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:34,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:37:34,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:37:34,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:37:34,875 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:34,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93738626] [2022-01-10 06:37:34,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93738626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:34,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:34,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2022-01-10 06:37:34,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070954955] [2022-01-10 06:37:34,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:34,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:37:34,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:34,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:37:34,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:37:34,878 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:37:34,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:34,979 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-01-10 06:37:34,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:37:34,980 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 22 [2022-01-10 06:37:34,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:34,981 INFO L225 Difference]: With dead ends: 27 [2022-01-10 06:37:34,981 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 06:37:34,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:37:34,982 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:34,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 37 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:34,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 06:37:34,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-01-10 06:37:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 06:37:34,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2022-01-10 06:37:34,987 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 22 [2022-01-10 06:37:34,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:34,987 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2022-01-10 06:37:34,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:37:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2022-01-10 06:37:34,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 06:37:34,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:34,988 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:35,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:35,194 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 06:37:35,194 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:35,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:35,195 INFO L85 PathProgramCache]: Analyzing trace with hash 17297569, now seen corresponding path program 1 times [2022-01-10 06:37:35,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:35,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605337562] [2022-01-10 06:37:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:35,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:35,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:35,197 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 06:37:35,197 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 06:37:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:35,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:37:35,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:37:35,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:37:35,473 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:35,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605337562] [2022-01-10 06:37:35,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605337562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:35,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:35,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2022-01-10 06:37:35,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920964679] [2022-01-10 06:37:35,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:35,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:37:35,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:35,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:37:35,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:37:35,475 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:37:35,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:35,553 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2022-01-10 06:37:35,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:37:35,555 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 23 [2022-01-10 06:37:35,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:35,556 INFO L225 Difference]: With dead ends: 45 [2022-01-10 06:37:35,556 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 06:37:35,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:37:35,557 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:35,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 58 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 06:37:35,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-10 06:37:35,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-01-10 06:37:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 42 transitions. [2022-01-10 06:37:35,570 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 42 transitions. Word has length 23 [2022-01-10 06:37:35,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:35,570 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 42 transitions. [2022-01-10 06:37:35,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:37:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 42 transitions. [2022-01-10 06:37:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 06:37:35,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:35,572 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:35,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:35,774 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 06:37:35,775 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:35,775 INFO L85 PathProgramCache]: Analyzing trace with hash -310195131, now seen corresponding path program 2 times [2022-01-10 06:37:35,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:35,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125661983] [2022-01-10 06:37:35,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:37:35,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:35,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:35,777 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 06:37:35,782 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 06:37:35,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:37:35,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:35,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:37:35,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 06:37:35,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 06:37:36,260 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:36,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125661983] [2022-01-10 06:37:36,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125661983] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:36,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:36,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2022-01-10 06:37:36,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426539829] [2022-01-10 06:37:36,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:36,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:37:36,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:36,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:37:36,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:37:36,262 INFO L87 Difference]: Start difference. First operand 27 states and 42 transitions. Second operand has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:37:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:36,413 INFO L93 Difference]: Finished difference Result 60 states and 110 transitions. [2022-01-10 06:37:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:37:36,414 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) Word has length 34 [2022-01-10 06:37:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:36,421 INFO L225 Difference]: With dead ends: 60 [2022-01-10 06:37:36,421 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 06:37:36,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:37:36,422 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:36,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 68 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 06:37:36,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-01-10 06:37:36,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-10 06:37:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-01-10 06:37:36,447 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 34 [2022-01-10 06:37:36,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:36,448 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-01-10 06:37:36,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:37:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-01-10 06:37:36,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 06:37:36,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:36,449 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:36,456 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 06:37:36,650 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 06:37:36,652 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:36,653 INFO L85 PathProgramCache]: Analyzing trace with hash -441896069, now seen corresponding path program 2 times [2022-01-10 06:37:36,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:36,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161115466] [2022-01-10 06:37:36,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:37:36,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:36,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:36,654 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 06:37:36,655 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 06:37:36,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:37:36,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:36,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:37:36,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 06:37:36,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 06:37:36,974 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:36,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161115466] [2022-01-10 06:37:36,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161115466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:36,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:36,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2022-01-10 06:37:36,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916062799] [2022-01-10 06:37:36,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:36,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:37:36,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:36,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:37:36,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:37:36,976 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:37:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:37,072 INFO L93 Difference]: Finished difference Result 67 states and 115 transitions. [2022-01-10 06:37:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:37:37,073 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) Word has length 36 [2022-01-10 06:37:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:37,074 INFO L225 Difference]: With dead ends: 67 [2022-01-10 06:37:37,074 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 06:37:37,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:37:37,076 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:37,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 69 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:37,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 06:37:37,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-01-10 06:37:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (22), 10 states have call predecessors, (22), 7 states have call successors, (22) [2022-01-10 06:37:37,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 54 transitions. [2022-01-10 06:37:37,085 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 54 transitions. Word has length 36 [2022-01-10 06:37:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:37,086 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 54 transitions. [2022-01-10 06:37:37,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:37:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 54 transitions. [2022-01-10 06:37:37,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 06:37:37,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:37,090 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:37,103 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 06:37:37,296 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 06:37:37,298 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:37,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:37,299 INFO L85 PathProgramCache]: Analyzing trace with hash -104523349, now seen corresponding path program 3 times [2022-01-10 06:37:37,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:37,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394843621] [2022-01-10 06:37:37,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:37:37,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:37,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:37,300 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 06:37:37,302 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 06:37:37,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 06:37:37,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:37,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:37:37,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 180 proven. 5 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-01-10 06:37:37,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 136 proven. 15 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2022-01-10 06:37:37,900 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:37,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394843621] [2022-01-10 06:37:37,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394843621] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:37,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:37,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2022-01-10 06:37:37,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259662752] [2022-01-10 06:37:37,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:37,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:37:37,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:37:37,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:37:37,901 INFO L87 Difference]: Start difference. First operand 37 states and 54 transitions. Second operand has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-01-10 06:37:38,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:38,002 INFO L93 Difference]: Finished difference Result 66 states and 98 transitions. [2022-01-10 06:37:38,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:37:38,002 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 83 [2022-01-10 06:37:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:38,003 INFO L225 Difference]: With dead ends: 66 [2022-01-10 06:37:38,004 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 06:37:38,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:37:38,005 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:38,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 56 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:38,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 06:37:38,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-10 06:37:38,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-01-10 06:37:38,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-01-10 06:37:38,011 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 83 [2022-01-10 06:37:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:38,011 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-01-10 06:37:38,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-01-10 06:37:38,012 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-01-10 06:37:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 06:37:38,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:38,012 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:38,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:38,223 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 06:37:38,224 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:38,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:38,224 INFO L85 PathProgramCache]: Analyzing trace with hash 694906923, now seen corresponding path program 4 times [2022-01-10 06:37:38,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:38,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406990445] [2022-01-10 06:37:38,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:37:38,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:38,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:38,225 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 06:37:38,226 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 06:37:38,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:37:38,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:38,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:37:38,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 27 proven. 154 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-01-10 06:37:38,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 27 proven. 169 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-01-10 06:37:38,784 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:38,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406990445] [2022-01-10 06:37:38,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406990445] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:38,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:38,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2022-01-10 06:37:38,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589172919] [2022-01-10 06:37:38,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:38,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 06:37:38,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:38,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 06:37:38,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:37:38,785 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) [2022-01-10 06:37:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:38,899 INFO L93 Difference]: Finished difference Result 72 states and 104 transitions. [2022-01-10 06:37:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:37:38,900 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) Word has length 87 [2022-01-10 06:37:38,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:38,901 INFO L225 Difference]: With dead ends: 72 [2022-01-10 06:37:38,901 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 06:37:38,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:37:38,902 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:38,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 91 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:38,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 06:37:38,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-01-10 06:37:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (15), 9 states have call predecessors, (15), 7 states have call successors, (15) [2022-01-10 06:37:38,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-01-10 06:37:38,906 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 87 [2022-01-10 06:37:38,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:38,906 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-01-10 06:37:38,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) [2022-01-10 06:37:38,906 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-01-10 06:37:38,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-10 06:37:38,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:38,907 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:38,927 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 06:37:39,114 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 06:37:39,114 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:39,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:39,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1826158945, now seen corresponding path program 5 times [2022-01-10 06:37:39,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:39,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043312312] [2022-01-10 06:37:39,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:37:39,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:39,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:39,116 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 06:37:39,117 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 06:37:39,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-01-10 06:37:39,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:39,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-10 06:37:39,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 318 proven. 265 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-01-10 06:37:39,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 321 proven. 309 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2022-01-10 06:37:41,350 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:41,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043312312] [2022-01-10 06:37:41,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043312312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:41,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:41,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 23 [2022-01-10 06:37:41,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889327518] [2022-01-10 06:37:41,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:41,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 06:37:41,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:41,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 06:37:41,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:37:41,352 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 23 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) [2022-01-10 06:37:41,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:41,786 INFO L93 Difference]: Finished difference Result 99 states and 164 transitions. [2022-01-10 06:37:41,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:37:41,788 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) Word has length 137 [2022-01-10 06:37:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:41,789 INFO L225 Difference]: With dead ends: 99 [2022-01-10 06:37:41,789 INFO L226 Difference]: Without dead ends: 62 [2022-01-10 06:37:41,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 242 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2022-01-10 06:37:41,790 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 86 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:41,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 143 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:37:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-10 06:37:41,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2022-01-10 06:37:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (29), 13 states have call predecessors, (29), 10 states have call successors, (29) [2022-01-10 06:37:41,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2022-01-10 06:37:41,809 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 137 [2022-01-10 06:37:41,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:41,809 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2022-01-10 06:37:41,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) [2022-01-10 06:37:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2022-01-10 06:37:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-10 06:37:41,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:41,810 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:41,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:42,015 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 06:37:42,016 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:42,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:42,016 INFO L85 PathProgramCache]: Analyzing trace with hash -999938399, now seen corresponding path program 6 times [2022-01-10 06:37:42,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:42,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554178492] [2022-01-10 06:37:42,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:37:42,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:42,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:42,018 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 06:37:42,019 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 06:37:42,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-10 06:37:42,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:42,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:37:42,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 41 proven. 212 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-01-10 06:37:42,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 41 proven. 238 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-01-10 06:37:42,762 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:42,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554178492] [2022-01-10 06:37:42,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554178492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:42,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:42,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2022-01-10 06:37:42,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227447341] [2022-01-10 06:37:42,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:42,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 06:37:42,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:42,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 06:37:42,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:37:42,764 INFO L87 Difference]: Start difference. First operand 52 states and 74 transitions. Second operand has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 6 states have call predecessors, (16), 12 states have call successors, (16) [2022-01-10 06:37:42,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:42,929 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2022-01-10 06:37:42,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:37:42,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 6 states have call predecessors, (16), 12 states have call successors, (16) Word has length 99 [2022-01-10 06:37:42,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:42,930 INFO L225 Difference]: With dead ends: 56 [2022-01-10 06:37:42,930 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 06:37:42,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:37:42,931 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:42,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 126 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:42,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 06:37:42,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-10 06:37:42,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (28), 13 states have call predecessors, (28), 10 states have call successors, (28) [2022-01-10 06:37:42,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2022-01-10 06:37:42,938 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 99 [2022-01-10 06:37:42,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:42,938 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2022-01-10 06:37:42,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 6 states have call predecessors, (16), 12 states have call successors, (16) [2022-01-10 06:37:42,939 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2022-01-10 06:37:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-10 06:37:42,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:42,940 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:42,970 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 06:37:43,155 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 06:37:43,155 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:43,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:43,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1213908091, now seen corresponding path program 7 times [2022-01-10 06:37:43,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:43,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648967108] [2022-01-10 06:37:43,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:37:43,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:43,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:43,158 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 06:37:43,160 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 06:37:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:43,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:37:43,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 89 proven. 492 refuted. 0 times theorem prover too weak. 1007 trivial. 0 not checked. [2022-01-10 06:37:43,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 89 proven. 532 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2022-01-10 06:37:44,324 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:44,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648967108] [2022-01-10 06:37:44,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648967108] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:44,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:44,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2022-01-10 06:37:44,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689250504] [2022-01-10 06:37:44,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:44,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 06:37:44,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:44,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 06:37:44,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:37:44,326 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2022-01-10 06:37:44,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:44,583 INFO L93 Difference]: Finished difference Result 120 states and 216 transitions. [2022-01-10 06:37:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:37:44,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) Word has length 162 [2022-01-10 06:37:44,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:44,584 INFO L225 Difference]: With dead ends: 120 [2022-01-10 06:37:44,585 INFO L226 Difference]: Without dead ends: 71 [2022-01-10 06:37:44,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 305 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:37:44,586 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:44,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 169 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:37:44,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-10 06:37:44,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2022-01-10 06:37:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 12 states have call successors, (12), 6 states have call predecessors, (12), 9 states have return successors, (33), 15 states have call predecessors, (33), 12 states have call successors, (33) [2022-01-10 06:37:44,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2022-01-10 06:37:44,591 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 162 [2022-01-10 06:37:44,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:44,591 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2022-01-10 06:37:44,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2022-01-10 06:37:44,592 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2022-01-10 06:37:44,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-10 06:37:44,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:44,593 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:44,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 06:37:44,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:44,801 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:44,801 INFO L85 PathProgramCache]: Analyzing trace with hash -812944297, now seen corresponding path program 8 times [2022-01-10 06:37:44,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:44,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383434016] [2022-01-10 06:37:44,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:37:44,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:44,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:44,803 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:44,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:37:44,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:37:44,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:44,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:37:44,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 178 proven. 1042 refuted. 0 times theorem prover too weak. 3158 trivial. 0 not checked. [2022-01-10 06:37:45,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 178 proven. 1099 refuted. 0 times theorem prover too weak. 3101 trivial. 0 not checked. [2022-01-10 06:37:46,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:46,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383434016] [2022-01-10 06:37:46,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383434016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:46,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:46,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2022-01-10 06:37:46,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694281432] [2022-01-10 06:37:46,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:46,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:37:46,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:46,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:37:46,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:37:46,402 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand has 19 states, 17 states have (on average 3.0) internal successors, (51), 19 states have internal predecessors, (51), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2022-01-10 06:37:46,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:46,722 INFO L93 Difference]: Finished difference Result 137 states and 257 transitions. [2022-01-10 06:37:46,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:37:46,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0) internal successors, (51), 19 states have internal predecessors, (51), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) Word has length 263 [2022-01-10 06:37:46,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:46,723 INFO L225 Difference]: With dead ends: 137 [2022-01-10 06:37:46,723 INFO L226 Difference]: Without dead ends: 80 [2022-01-10 06:37:46,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 505 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:37:46,724 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 68 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:46,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 201 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:37:46,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-10 06:37:46,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2022-01-10 06:37:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (34), 16 states have call predecessors, (34), 14 states have call successors, (34) [2022-01-10 06:37:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2022-01-10 06:37:46,730 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 263 [2022-01-10 06:37:46,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:46,732 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2022-01-10 06:37:46,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0) internal successors, (51), 19 states have internal predecessors, (51), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2022-01-10 06:37:46,733 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2022-01-10 06:37:46,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-01-10 06:37:46,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:46,736 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:46,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:46,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:46,944 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:46,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:46,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1895432243, now seen corresponding path program 9 times [2022-01-10 06:37:46,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:46,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279788272] [2022-01-10 06:37:46,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:37:46,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:46,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:46,946 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:46,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:37:47,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-01-10 06:37:47,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:47,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:37:47,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11859 backedges. 1310 proven. 242 refuted. 0 times theorem prover too weak. 10307 trivial. 0 not checked. [2022-01-10 06:37:47,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11859 backedges. 1310 proven. 271 refuted. 0 times theorem prover too weak. 10278 trivial. 0 not checked. [2022-01-10 06:37:48,864 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:48,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279788272] [2022-01-10 06:37:48,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279788272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:48,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:48,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2022-01-10 06:37:48,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162069354] [2022-01-10 06:37:48,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:48,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 06:37:48,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:48,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 06:37:48,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:37:48,865 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2022-01-10 06:37:48,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:48,979 INFO L93 Difference]: Finished difference Result 72 states and 100 transitions. [2022-01-10 06:37:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:37:48,979 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) Word has length 427 [2022-01-10 06:37:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:48,980 INFO L225 Difference]: With dead ends: 72 [2022-01-10 06:37:48,980 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 06:37:48,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 857 GetRequests, 838 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:37:48,981 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:48,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 117 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:48,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 06:37:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-01-10 06:37:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 14 states have call successors, (14), 7 states have call predecessors, (14), 10 states have return successors, (37), 17 states have call predecessors, (37), 14 states have call successors, (37) [2022-01-10 06:37:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 96 transitions. [2022-01-10 06:37:48,986 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 96 transitions. Word has length 427 [2022-01-10 06:37:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:48,987 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 96 transitions. [2022-01-10 06:37:48,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2022-01-10 06:37:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 96 transitions. [2022-01-10 06:37:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2022-01-10 06:37:48,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:48,992 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 67, 41, 41, 41, 41, 41, 41, 26, 16, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:49,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:49,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:49,200 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:49,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:49,200 INFO L85 PathProgramCache]: Analyzing trace with hash 279703193, now seen corresponding path program 10 times [2022-01-10 06:37:49,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:49,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24104840] [2022-01-10 06:37:49,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:37:49,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:49,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:49,202 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:49,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:37:49,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:37:49,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:49,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:37:49,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18283 backedges. 376 proven. 2708 refuted. 0 times theorem prover too weak. 15199 trivial. 0 not checked. [2022-01-10 06:37:49,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18283 backedges. 376 proven. 2785 refuted. 0 times theorem prover too weak. 15122 trivial. 0 not checked. [2022-01-10 06:37:51,882 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:51,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24104840] [2022-01-10 06:37:51,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24104840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:51,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:51,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2022-01-10 06:37:51,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244877762] [2022-01-10 06:37:51,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:51,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 06:37:51,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:51,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 06:37:51,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:37:51,883 INFO L87 Difference]: Start difference. First operand 68 states and 96 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2022-01-10 06:37:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:52,266 INFO L93 Difference]: Finished difference Result 156 states and 287 transitions. [2022-01-10 06:37:52,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:37:52,271 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) Word has length 528 [2022-01-10 06:37:52,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:52,273 INFO L225 Difference]: With dead ends: 156 [2022-01-10 06:37:52,273 INFO L226 Difference]: Without dead ends: 91 [2022-01-10 06:37:52,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 1033 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-01-10 06:37:52,274 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 101 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:52,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 228 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:37:52,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-10 06:37:52,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2022-01-10 06:37:52,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 15 states have call successors, (15), 8 states have call predecessors, (15), 10 states have return successors, (31), 17 states have call predecessors, (31), 15 states have call successors, (31) [2022-01-10 06:37:52,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2022-01-10 06:37:52,279 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 528 [2022-01-10 06:37:52,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:52,279 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2022-01-10 06:37:52,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2022-01-10 06:37:52,279 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2022-01-10 06:37:52,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2022-01-10 06:37:52,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:52,283 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:52,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:52,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:52,487 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:52,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:52,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1303971427, now seen corresponding path program 11 times [2022-01-10 06:37:52,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:52,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336194764] [2022-01-10 06:37:52,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:37:52,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:52,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:52,490 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:52,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:37:53,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 92 check-sat command(s) [2022-01-10 06:37:53,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:53,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 06:37:53,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 31665 backedges. 2804 proven. 1289 refuted. 0 times theorem prover too weak. 27572 trivial. 0 not checked. [2022-01-10 06:37:54,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 31665 backedges. 2788 proven. 1358 refuted. 0 times theorem prover too weak. 27519 trivial. 0 not checked. [2022-01-10 06:37:58,815 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:58,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336194764] [2022-01-10 06:37:58,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336194764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:58,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:58,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 25 [2022-01-10 06:37:58,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981509216] [2022-01-10 06:37:58,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:58,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 06:37:58,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:58,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 06:37:58,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:37:58,817 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 25 states, 21 states have (on average 2.761904761904762) internal successors, (58), 25 states have internal predecessors, (58), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 13 states have call predecessors, (27), 18 states have call successors, (27) [2022-01-10 06:38:00,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:00,173 INFO L93 Difference]: Finished difference Result 121 states and 154 transitions. [2022-01-10 06:38:00,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 06:38:00,174 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.761904761904762) internal successors, (58), 25 states have internal predecessors, (58), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 13 states have call predecessors, (27), 18 states have call successors, (27) Word has length 692 [2022-01-10 06:38:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:00,176 INFO L225 Difference]: With dead ends: 121 [2022-01-10 06:38:00,176 INFO L226 Difference]: Without dead ends: 115 [2022-01-10 06:38:00,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1400 GetRequests, 1352 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=371, Invalid=1435, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 06:38:00,177 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 134 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:00,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 208 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 06:38:00,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-10 06:38:00,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2022-01-10 06:38:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 15 states have call successors, (15), 8 states have call predecessors, (15), 13 states have return successors, (37), 20 states have call predecessors, (37), 15 states have call successors, (37) [2022-01-10 06:38:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 105 transitions. [2022-01-10 06:38:00,183 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 105 transitions. Word has length 692 [2022-01-10 06:38:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:00,183 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 105 transitions. [2022-01-10 06:38:00,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.761904761904762) internal successors, (58), 25 states have internal predecessors, (58), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 13 states have call predecessors, (27), 18 states have call successors, (27) [2022-01-10 06:38:00,184 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 105 transitions. [2022-01-10 06:38:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2022-01-10 06:38:00,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:00,187 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 109, 67, 67, 67, 67, 67, 67, 42, 26, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:00,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-01-10 06:38:00,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:00,400 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:00,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:00,400 INFO L85 PathProgramCache]: Analyzing trace with hash 997121709, now seen corresponding path program 12 times [2022-01-10 06:38:00,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:00,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282296086] [2022-01-10 06:38:00,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:38:00,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:00,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:00,416 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:00,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:38:00,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-01-10 06:38:00,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:00,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:38:00,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 48699 backedges. 959 proven. 4255 refuted. 0 times theorem prover too weak. 43485 trivial. 0 not checked. [2022-01-10 06:38:01,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 48699 backedges. 959 proven. 4332 refuted. 0 times theorem prover too weak. 43408 trivial. 0 not checked. [2022-01-10 06:38:04,208 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:04,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282296086] [2022-01-10 06:38:04,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282296086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:04,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:04,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2022-01-10 06:38:04,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320231598] [2022-01-10 06:38:04,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:04,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 06:38:04,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:04,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 06:38:04,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:38:04,210 INFO L87 Difference]: Start difference. First operand 81 states and 105 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2022-01-10 06:38:04,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:04,621 INFO L93 Difference]: Finished difference Result 230 states and 414 transitions. [2022-01-10 06:38:04,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:38:04,621 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) Word has length 856 [2022-01-10 06:38:04,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:04,623 INFO L225 Difference]: With dead ends: 230 [2022-01-10 06:38:04,623 INFO L226 Difference]: Without dead ends: 136 [2022-01-10 06:38:04,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1718 GetRequests, 1690 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-01-10 06:38:04,625 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 88 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:04,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 219 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:38:04,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-10 06:38:04,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 99. [2022-01-10 06:38:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 18 states have call successors, (18), 10 states have call predecessors, (18), 16 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-01-10 06:38:04,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 132 transitions. [2022-01-10 06:38:04,632 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 132 transitions. Word has length 856 [2022-01-10 06:38:04,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:04,632 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 132 transitions. [2022-01-10 06:38:04,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2022-01-10 06:38:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 132 transitions. [2022-01-10 06:38:04,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1122 [2022-01-10 06:38:04,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:04,639 INFO L514 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:04,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:04,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:04,847 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:04,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:04,848 INFO L85 PathProgramCache]: Analyzing trace with hash -776657203, now seen corresponding path program 13 times [2022-01-10 06:38:04,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:04,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414141080] [2022-01-10 06:38:04,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:38:04,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:04,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:04,850 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:04,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:38:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:05,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 1577 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 06:38:05,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 83941 backedges. 1067 proven. 7568 refuted. 0 times theorem prover too weak. 75306 trivial. 0 not checked. [2022-01-10 06:38:06,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 83941 backedges. 1067 proven. 7694 refuted. 0 times theorem prover too weak. 75180 trivial. 0 not checked. [2022-01-10 06:38:10,196 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:10,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414141080] [2022-01-10 06:38:10,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414141080] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:10,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:10,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2022-01-10 06:38:10,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471613890] [2022-01-10 06:38:10,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:10,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 06:38:10,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:10,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 06:38:10,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:38:10,206 INFO L87 Difference]: Start difference. First operand 99 states and 132 transitions. Second operand has 25 states, 23 states have (on average 2.869565217391304) internal successors, (66), 25 states have internal predecessors, (66), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2022-01-10 06:38:10,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:10,680 INFO L93 Difference]: Finished difference Result 233 states and 463 transitions. [2022-01-10 06:38:10,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 06:38:10,681 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.869565217391304) internal successors, (66), 25 states have internal predecessors, (66), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) Word has length 1121 [2022-01-10 06:38:10,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:10,683 INFO L225 Difference]: With dead ends: 233 [2022-01-10 06:38:10,683 INFO L226 Difference]: Without dead ends: 137 [2022-01-10 06:38:10,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2250 GetRequests, 2214 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 06:38:10,684 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 44 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:10,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 307 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:38:10,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-10 06:38:10,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 97. [2022-01-10 06:38:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 19 states have call successors, (19), 10 states have call predecessors, (19), 15 states have return successors, (45), 24 states have call predecessors, (45), 19 states have call successors, (45) [2022-01-10 06:38:10,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 127 transitions. [2022-01-10 06:38:10,690 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 127 transitions. Word has length 1121 [2022-01-10 06:38:10,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:10,691 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 127 transitions. [2022-01-10 06:38:10,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.869565217391304) internal successors, (66), 25 states have internal predecessors, (66), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2022-01-10 06:38:10,691 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 127 transitions. [2022-01-10 06:38:10,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2245 [2022-01-10 06:38:10,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:10,714 INFO L514 BasicCegarLoop]: trace histogram [355, 355, 287, 177, 177, 177, 177, 177, 177, 110, 68, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:10,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-01-10 06:38:10,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:10,928 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:10,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:10,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1026576851, now seen corresponding path program 14 times [2022-01-10 06:38:10,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:10,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101198642] [2022-01-10 06:38:10,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:10,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:10,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:10,931 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:10,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 06:38:11,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:11,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:11,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 3145 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 06:38:11,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 339109 backedges. 2001 proven. 17597 refuted. 0 times theorem prover too weak. 319511 trivial. 0 not checked. [2022-01-10 06:38:13,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 339109 backedges. 2001 proven. 17752 refuted. 0 times theorem prover too weak. 319356 trivial. 0 not checked. [2022-01-10 06:38:20,939 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:20,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101198642] [2022-01-10 06:38:20,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101198642] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:20,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:20,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2022-01-10 06:38:20,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002172841] [2022-01-10 06:38:20,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:20,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 06:38:20,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:20,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 06:38:20,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-10 06:38:20,943 INFO L87 Difference]: Start difference. First operand 97 states and 127 transitions. Second operand has 27 states, 25 states have (on average 2.84) internal successors, (71), 27 states have internal predecessors, (71), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2022-01-10 06:38:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:21,614 INFO L93 Difference]: Finished difference Result 230 states and 455 transitions. [2022-01-10 06:38:21,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 06:38:21,614 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.84) internal successors, (71), 27 states have internal predecessors, (71), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) Word has length 2244 [2022-01-10 06:38:21,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:21,632 INFO L225 Difference]: With dead ends: 230 [2022-01-10 06:38:21,632 INFO L226 Difference]: Without dead ends: 136 [2022-01-10 06:38:21,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4497 GetRequests, 4456 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 06:38:21,633 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 168 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:21,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 372 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:38:21,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-10 06:38:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2022-01-10 06:38:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 21 states have call successors, (21), 11 states have call predecessors, (21), 16 states have return successors, (49), 26 states have call predecessors, (49), 21 states have call successors, (49) [2022-01-10 06:38:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2022-01-10 06:38:21,644 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 2244 [2022-01-10 06:38:21,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:21,645 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2022-01-10 06:38:21,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.84) internal successors, (71), 27 states have internal predecessors, (71), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2022-01-10 06:38:21,646 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2022-01-10 06:38:21,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3633 [2022-01-10 06:38:21,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:21,736 INFO L514 BasicCegarLoop]: trace histogram [575, 575, 465, 287, 287, 287, 287, 287, 287, 178, 110, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:21,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:21,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:21,940 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:21,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:21,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1985919741, now seen corresponding path program 15 times [2022-01-10 06:38:21,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:21,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183106051] [2022-01-10 06:38:21,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:38:21,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:21,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:21,944 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:21,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 06:38:22,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2022-01-10 06:38:22,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:22,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 06:38:22,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 891103 backedges. 3366 proven. 31688 refuted. 0 times theorem prover too weak. 856049 trivial. 0 not checked. [2022-01-10 06:38:26,011 INFO L328 TraceCheckSpWp]: Computing backward predicates...