/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/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:47:02,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:47:02,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:47:02,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:47:02,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:47:02,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:47:02,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:47:02,583 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 06:47:02,608 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:47:02,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:47:02,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:47:02,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:47:02,610 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:47:02,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:47:02,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:47:02,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:47:02,611 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:47:02,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:47:02,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:47:02,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:47:02,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:47:02,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:47:02,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:47:02,612 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:47:02,612 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:47:02,612 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:47:02,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:47:02,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:47:02,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:47:02,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:47:02,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:47:02,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:47:02,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:47:02,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:47:02,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:47:02,614 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:47:02,614 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:47:02,614 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:47:02,614 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:47:02,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:47:02,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:47:02,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:47:02,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:47:02,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:47:02,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:47:02,792 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:47:02,793 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:47:02,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c [2022-01-10 06:47:02,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b101e39/d570038fb31e4f2b9e7c0036457c2f14/FLAGba719616e [2022-01-10 06:47:03,230 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:47:03,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c [2022-01-10 06:47:03,245 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b101e39/d570038fb31e4f2b9e7c0036457c2f14/FLAGba719616e [2022-01-10 06:47:03,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b101e39/d570038fb31e4f2b9e7c0036457c2f14 [2022-01-10 06:47:03,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:47:03,265 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:47:03,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:47:03,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:47:03,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:47:03,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:47:03" (1/1) ... [2022-01-10 06:47:03,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@450972b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:47:03, skipping insertion in model container [2022-01-10 06:47:03,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:47:03" (1/1) ... [2022-01-10 06:47:03,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:47:03,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:47:03,533 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c[12762,12775] [2022-01-10 06:47:03,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:47:03,540 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:47:03,591 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c[12762,12775] [2022-01-10 06:47:03,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:47:03,611 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:47:03,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:47:03 WrapperNode [2022-01-10 06:47:03,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:47:03,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:47:03,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:47:03,613 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:47:03,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:47:03" (1/1) ... [2022-01-10 06:47:03,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:47:03" (1/1) ... [2022-01-10 06:47:03,659 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 421 [2022-01-10 06:47:03,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:47:03,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:47:03,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:47:03,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:47:03,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:47:03" (1/1) ... [2022-01-10 06:47:03,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:47:03" (1/1) ... [2022-01-10 06:47:03,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:47:03" (1/1) ... [2022-01-10 06:47:03,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:47:03" (1/1) ... [2022-01-10 06:47:03,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:47:03" (1/1) ... [2022-01-10 06:47:03,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:47:03" (1/1) ... [2022-01-10 06:47:03,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:47:03" (1/1) ... [2022-01-10 06:47:03,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:47:03,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:47:03,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:47:03,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:47:03,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:47:03" (1/1) ... [2022-01-10 06:47:03,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:47:03,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:47:03,731 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 06:47:03,735 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 06:47:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:47:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:47:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:47:03,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:47:03,869 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:47:03,871 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:47:04,301 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:47:04,306 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:47:04,307 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:47:04,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:47:04 BoogieIcfgContainer [2022-01-10 06:47:04,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:47:04,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:47:04,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:47:04,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:47:04,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:47:03" (1/3) ... [2022-01-10 06:47:04,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41828c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:47:04, skipping insertion in model container [2022-01-10 06:47:04,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:47:03" (2/3) ... [2022-01-10 06:47:04,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41828c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:47:04, skipping insertion in model container [2022-01-10 06:47:04,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:47:04" (3/3) ... [2022-01-10 06:47:04,320 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c [2022-01-10 06:47:04,323 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:47:04,323 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:47:04,349 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:47:04,353 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 06:47:04,353 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:47:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.7596899224806202) internal successors, (227), 130 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 06:47:04,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:04,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:04,368 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:04,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:04,371 INFO L85 PathProgramCache]: Analyzing trace with hash -306716250, now seen corresponding path program 1 times [2022-01-10 06:47:04,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:04,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176016846] [2022-01-10 06:47:04,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:04,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:04,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:04,381 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 06:47:04,381 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 06:47:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:04,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:47:04,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:04,528 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 06:47:04,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:04,529 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:04,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176016846] [2022-01-10 06:47:04,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176016846] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:04,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:04,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:47:04,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661754619] [2022-01-10 06:47:04,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:04,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:47:04,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:04,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:47:04,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:47:04,550 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.7596899224806202) internal successors, (227), 130 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:04,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:04,568 INFO L93 Difference]: Finished difference Result 206 states and 352 transitions. [2022-01-10 06:47:04,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:47:04,569 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-10 06:47:04,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:04,575 INFO L225 Difference]: With dead ends: 206 [2022-01-10 06:47:04,575 INFO L226 Difference]: Without dead ends: 127 [2022-01-10 06:47:04,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:47:04,579 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:04,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:04,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-10 06:47:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-01-10 06:47:04,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.746031746031746) internal successors, (220), 126 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 220 transitions. [2022-01-10 06:47:04,604 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 220 transitions. Word has length 37 [2022-01-10 06:47:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:04,604 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 220 transitions. [2022-01-10 06:47:04,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:04,605 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 220 transitions. [2022-01-10 06:47:04,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 06:47:04,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:04,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:04,615 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 06:47:04,819 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 06:47:04,820 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:04,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1124364700, now seen corresponding path program 1 times [2022-01-10 06:47:04,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:04,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804654201] [2022-01-10 06:47:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:04,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:04,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:04,824 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 06:47:04,827 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 06:47:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:04,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:47:04,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:04,998 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 06:47:04,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:04,998 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:04,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804654201] [2022-01-10 06:47:04,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804654201] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:04,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:04,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:47:05,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144922814] [2022-01-10 06:47:05,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:05,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:47:05,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:05,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:47:05,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:05,006 INFO L87 Difference]: Start difference. First operand 127 states and 220 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:05,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:05,093 INFO L93 Difference]: Finished difference Result 271 states and 460 transitions. [2022-01-10 06:47:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:47:05,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-10 06:47:05,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:05,098 INFO L225 Difference]: With dead ends: 271 [2022-01-10 06:47:05,098 INFO L226 Difference]: Without dead ends: 197 [2022-01-10 06:47:05,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:47:05,100 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 120 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:05,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 832 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:05,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-10 06:47:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2022-01-10 06:47:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.5317460317460319) internal successors, (193), 126 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 193 transitions. [2022-01-10 06:47:05,120 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 193 transitions. Word has length 37 [2022-01-10 06:47:05,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:05,120 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 193 transitions. [2022-01-10 06:47:05,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:05,122 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 193 transitions. [2022-01-10 06:47:05,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 06:47:05,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:05,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:05,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:05,331 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 06:47:05,331 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:05,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:05,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1313145683, now seen corresponding path program 1 times [2022-01-10 06:47:05,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:05,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262980691] [2022-01-10 06:47:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:05,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:05,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:05,335 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 06:47:05,337 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 06:47:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:05,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:47:05,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:05,534 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 06:47:05,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:05,534 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:05,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262980691] [2022-01-10 06:47:05,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262980691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:05,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:05,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:47:05,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450443352] [2022-01-10 06:47:05,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:05,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:47:05,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:05,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:47:05,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:05,536 INFO L87 Difference]: Start difference. First operand 127 states and 193 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:05,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:05,584 INFO L93 Difference]: Finished difference Result 258 states and 412 transitions. [2022-01-10 06:47:05,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:47:05,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 06:47:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:05,586 INFO L225 Difference]: With dead ends: 258 [2022-01-10 06:47:05,586 INFO L226 Difference]: Without dead ends: 188 [2022-01-10 06:47:05,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:05,587 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 93 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:05,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 421 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:05,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-10 06:47:05,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2022-01-10 06:47:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5567567567567568) internal successors, (288), 185 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 288 transitions. [2022-01-10 06:47:05,593 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 288 transitions. Word has length 63 [2022-01-10 06:47:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:05,594 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 288 transitions. [2022-01-10 06:47:05,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 288 transitions. [2022-01-10 06:47:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:47:05,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:05,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:05,606 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 06:47:05,806 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 06:47:05,806 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:05,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:05,807 INFO L85 PathProgramCache]: Analyzing trace with hash -255493166, now seen corresponding path program 1 times [2022-01-10 06:47:05,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:05,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974976420] [2022-01-10 06:47:05,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:05,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:05,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:05,809 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 06:47:05,810 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 06:47:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:05,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:47:05,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:05,958 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 06:47:05,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:05,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:05,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974976420] [2022-01-10 06:47:05,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974976420] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:05,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:05,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:47:05,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900173156] [2022-01-10 06:47:05,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:05,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:47:05,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:05,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:47:05,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:05,960 INFO L87 Difference]: Start difference. First operand 186 states and 288 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:05,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:05,972 INFO L93 Difference]: Finished difference Result 313 states and 501 transitions. [2022-01-10 06:47:05,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:47:05,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 06:47:05,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:05,974 INFO L225 Difference]: With dead ends: 313 [2022-01-10 06:47:05,974 INFO L226 Difference]: Without dead ends: 243 [2022-01-10 06:47:05,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:05,975 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 102 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:05,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 441 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-10 06:47:05,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 241. [2022-01-10 06:47:05,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.5833333333333333) internal successors, (380), 240 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:05,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 380 transitions. [2022-01-10 06:47:05,982 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 380 transitions. Word has length 65 [2022-01-10 06:47:05,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:05,982 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 380 transitions. [2022-01-10 06:47:05,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:05,982 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 380 transitions. [2022-01-10 06:47:05,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:47:05,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:05,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:05,992 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 06:47:06,190 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 06:47:06,190 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:06,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:06,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1395779292, now seen corresponding path program 1 times [2022-01-10 06:47:06,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:06,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421711224] [2022-01-10 06:47:06,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:06,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:06,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:06,193 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 06:47:06,207 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 06:47:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:06,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:06,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:06,399 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 06:47:06,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:06,399 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:06,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421711224] [2022-01-10 06:47:06,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421711224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:06,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:06,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:06,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073911472] [2022-01-10 06:47:06,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:06,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:06,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:06,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:06,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:06,401 INFO L87 Difference]: Start difference. First operand 241 states and 380 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:06,433 INFO L93 Difference]: Finished difference Result 701 states and 1103 transitions. [2022-01-10 06:47:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:06,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 06:47:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:06,436 INFO L225 Difference]: With dead ends: 701 [2022-01-10 06:47:06,436 INFO L226 Difference]: Without dead ends: 469 [2022-01-10 06:47:06,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:06,439 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 393 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:06,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 463 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:06,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-10 06:47:06,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 467. [2022-01-10 06:47:06,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 1.5665236051502145) internal successors, (730), 466 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:06,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 730 transitions. [2022-01-10 06:47:06,457 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 730 transitions. Word has length 65 [2022-01-10 06:47:06,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:06,459 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 730 transitions. [2022-01-10 06:47:06,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:06,459 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 730 transitions. [2022-01-10 06:47:06,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 06:47:06,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:06,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:06,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 06:47:06,667 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 06:47:06,668 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:06,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:06,668 INFO L85 PathProgramCache]: Analyzing trace with hash 913413416, now seen corresponding path program 1 times [2022-01-10 06:47:06,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:06,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121412495] [2022-01-10 06:47:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:06,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:06,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:06,670 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 06:47:06,671 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 06:47:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:06,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:47:06,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:06,796 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 06:47:06,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:06,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:06,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121412495] [2022-01-10 06:47:06,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121412495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:06,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:06,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:47:06,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277127154] [2022-01-10 06:47:06,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:06,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:47:06,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:06,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:47:06,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:06,798 INFO L87 Difference]: Start difference. First operand 467 states and 730 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:06,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:06,813 INFO L93 Difference]: Finished difference Result 1363 states and 2128 transitions. [2022-01-10 06:47:06,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:47:06,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 06:47:06,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:06,816 INFO L225 Difference]: With dead ends: 1363 [2022-01-10 06:47:06,816 INFO L226 Difference]: Without dead ends: 924 [2022-01-10 06:47:06,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:06,817 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 182 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:06,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 544 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-01-10 06:47:06,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 469. [2022-01-10 06:47:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.564102564102564) internal successors, (732), 468 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:06,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 732 transitions. [2022-01-10 06:47:06,830 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 732 transitions. Word has length 66 [2022-01-10 06:47:06,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:06,830 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 732 transitions. [2022-01-10 06:47:06,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 732 transitions. [2022-01-10 06:47:06,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 06:47:06,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:06,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:06,840 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 06:47:07,040 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 06:47:07,040 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:07,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:07,041 INFO L85 PathProgramCache]: Analyzing trace with hash 2137442455, now seen corresponding path program 1 times [2022-01-10 06:47:07,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:07,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278713795] [2022-01-10 06:47:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:07,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:07,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:07,042 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 06:47:07,044 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 06:47:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:07,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:07,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:07,255 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 06:47:07,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:07,256 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:07,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278713795] [2022-01-10 06:47:07,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278713795] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:07,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:07,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:07,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150921663] [2022-01-10 06:47:07,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:07,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:07,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:07,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:07,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:07,257 INFO L87 Difference]: Start difference. First operand 469 states and 732 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:07,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:07,294 INFO L93 Difference]: Finished difference Result 1367 states and 2134 transitions. [2022-01-10 06:47:07,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:07,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-10 06:47:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:07,297 INFO L225 Difference]: With dead ends: 1367 [2022-01-10 06:47:07,297 INFO L226 Difference]: Without dead ends: 910 [2022-01-10 06:47:07,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:07,298 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 386 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:07,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 461 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:07,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-01-10 06:47:07,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 908. [2022-01-10 06:47:07,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 1.5490628445424477) internal successors, (1405), 907 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1405 transitions. [2022-01-10 06:47:07,319 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1405 transitions. Word has length 67 [2022-01-10 06:47:07,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:07,319 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1405 transitions. [2022-01-10 06:47:07,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1405 transitions. [2022-01-10 06:47:07,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 06:47:07,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:07,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:07,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-01-10 06:47:07,528 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 06:47:07,528 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:07,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:07,529 INFO L85 PathProgramCache]: Analyzing trace with hash 45483464, now seen corresponding path program 1 times [2022-01-10 06:47:07,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:07,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420142192] [2022-01-10 06:47:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:07,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:07,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:07,531 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 06:47:07,532 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 06:47:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:07,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:07,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:07,664 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 06:47:07,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:07,665 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:07,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420142192] [2022-01-10 06:47:07,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420142192] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:07,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:07,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:07,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160726800] [2022-01-10 06:47:07,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:07,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:07,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:07,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:07,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:07,666 INFO L87 Difference]: Start difference. First operand 908 states and 1405 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:07,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:07,692 INFO L93 Difference]: Finished difference Result 1581 states and 2441 transitions. [2022-01-10 06:47:07,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:07,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-10 06:47:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:07,695 INFO L225 Difference]: With dead ends: 1581 [2022-01-10 06:47:07,695 INFO L226 Difference]: Without dead ends: 689 [2022-01-10 06:47:07,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:07,696 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 69 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:07,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 610 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:07,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-01-10 06:47:07,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 689. [2022-01-10 06:47:07,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 1.5392441860465116) internal successors, (1059), 688 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:07,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1059 transitions. [2022-01-10 06:47:07,711 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1059 transitions. Word has length 67 [2022-01-10 06:47:07,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:07,711 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 1059 transitions. [2022-01-10 06:47:07,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:07,711 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1059 transitions. [2022-01-10 06:47:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:47:07,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:07,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:07,731 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 06:47:07,920 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 06:47:07,920 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:07,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1836023516, now seen corresponding path program 1 times [2022-01-10 06:47:07,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:07,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756595336] [2022-01-10 06:47:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:07,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:07,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:07,922 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 06:47:07,923 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 06:47:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:07,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:47:07,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:08,085 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 06:47:08,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:08,085 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:08,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756595336] [2022-01-10 06:47:08,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756595336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:08,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:08,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:47:08,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695977876] [2022-01-10 06:47:08,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:08,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:47:08,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:08,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:47:08,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:08,087 INFO L87 Difference]: Start difference. First operand 689 states and 1059 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:08,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:08,133 INFO L93 Difference]: Finished difference Result 1685 states and 2680 transitions. [2022-01-10 06:47:08,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:47:08,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-10 06:47:08,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:08,137 INFO L225 Difference]: With dead ends: 1685 [2022-01-10 06:47:08,138 INFO L226 Difference]: Without dead ends: 1157 [2022-01-10 06:47:08,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:08,140 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 91 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:08,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 356 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:08,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-01-10 06:47:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1155. [2022-01-10 06:47:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 1.5658578856152514) internal successors, (1807), 1154 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1807 transitions. [2022-01-10 06:47:08,169 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1807 transitions. Word has length 69 [2022-01-10 06:47:08,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:08,169 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 1807 transitions. [2022-01-10 06:47:08,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:08,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1807 transitions. [2022-01-10 06:47:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 06:47:08,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:08,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:08,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-01-10 06:47:08,378 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 06:47:08,379 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:08,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:08,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1905627253, now seen corresponding path program 1 times [2022-01-10 06:47:08,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:08,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365263127] [2022-01-10 06:47:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:08,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:08,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:08,381 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 06:47:08,388 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 06:47:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:08,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:08,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:08,541 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 06:47:08,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:08,541 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:08,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365263127] [2022-01-10 06:47:08,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365263127] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:08,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:08,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:08,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17970371] [2022-01-10 06:47:08,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:08,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:08,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:08,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:08,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:08,543 INFO L87 Difference]: Start difference. First operand 1155 states and 1807 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:08,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:08,598 INFO L93 Difference]: Finished difference Result 3362 states and 5262 transitions. [2022-01-10 06:47:08,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:08,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-01-10 06:47:08,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:08,604 INFO L225 Difference]: With dead ends: 3362 [2022-01-10 06:47:08,604 INFO L226 Difference]: Without dead ends: 2242 [2022-01-10 06:47:08,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:08,607 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 445 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:08,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 366 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:08,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2022-01-10 06:47:08,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2240. [2022-01-10 06:47:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 1.5533720410897722) internal successors, (3478), 2239 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:08,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 3478 transitions. [2022-01-10 06:47:08,659 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 3478 transitions. Word has length 71 [2022-01-10 06:47:08,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:08,659 INFO L470 AbstractCegarLoop]: Abstraction has 2240 states and 3478 transitions. [2022-01-10 06:47:08,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 3478 transitions. [2022-01-10 06:47:08,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 06:47:08,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:08,661 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:08,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-01-10 06:47:08,866 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 06:47:08,867 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:08,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:08,867 INFO L85 PathProgramCache]: Analyzing trace with hash 126166603, now seen corresponding path program 1 times [2022-01-10 06:47:08,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:08,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554093554] [2022-01-10 06:47:08,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:08,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:08,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:08,869 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 06:47:08,871 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 06:47:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:08,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:47:08,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:09,026 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 06:47:09,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:09,027 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:09,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554093554] [2022-01-10 06:47:09,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554093554] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:09,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:09,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:47:09,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726770997] [2022-01-10 06:47:09,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:09,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:47:09,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:09,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:47:09,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:09,028 INFO L87 Difference]: Start difference. First operand 2240 states and 3478 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:09,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:09,081 INFO L93 Difference]: Finished difference Result 4112 states and 6500 transitions. [2022-01-10 06:47:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:47:09,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-01-10 06:47:09,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:09,090 INFO L225 Difference]: With dead ends: 4112 [2022-01-10 06:47:09,090 INFO L226 Difference]: Without dead ends: 3079 [2022-01-10 06:47:09,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:09,092 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 94 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:09,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 430 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:09,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3079 states. [2022-01-10 06:47:09,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3079 to 3077. [2022-01-10 06:47:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 1.5588426527958388) internal successors, (4795), 3076 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 4795 transitions. [2022-01-10 06:47:09,184 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 4795 transitions. Word has length 71 [2022-01-10 06:47:09,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:09,184 INFO L470 AbstractCegarLoop]: Abstraction has 3077 states and 4795 transitions. [2022-01-10 06:47:09,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:09,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 4795 transitions. [2022-01-10 06:47:09,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 06:47:09,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:09,185 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:09,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:09,391 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 06:47:09,392 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:09,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:09,392 INFO L85 PathProgramCache]: Analyzing trace with hash 590514351, now seen corresponding path program 1 times [2022-01-10 06:47:09,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:09,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965721660] [2022-01-10 06:47:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:09,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:09,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:09,394 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 06:47:09,396 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 06:47:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:09,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:47:09,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:09,513 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 06:47:09,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:09,514 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:09,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965721660] [2022-01-10 06:47:09,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965721660] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:09,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:09,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:47:09,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706491559] [2022-01-10 06:47:09,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:09,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:47:09,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:09,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:47:09,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:09,515 INFO L87 Difference]: Start difference. First operand 3077 states and 4795 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:09,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:09,597 INFO L93 Difference]: Finished difference Result 9137 states and 14244 transitions. [2022-01-10 06:47:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:47:09,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-01-10 06:47:09,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:09,615 INFO L225 Difference]: With dead ends: 9137 [2022-01-10 06:47:09,615 INFO L226 Difference]: Without dead ends: 6116 [2022-01-10 06:47:09,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:09,622 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 168 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:09,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 500 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2022-01-10 06:47:09,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 3083. [2022-01-10 06:47:09,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3083 states, 3082 states have (on average 1.5577547047371836) internal successors, (4801), 3082 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 4801 transitions. [2022-01-10 06:47:09,722 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 4801 transitions. Word has length 72 [2022-01-10 06:47:09,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:09,722 INFO L470 AbstractCegarLoop]: Abstraction has 3083 states and 4801 transitions. [2022-01-10 06:47:09,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 4801 transitions. [2022-01-10 06:47:09,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 06:47:09,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:09,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:09,729 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 06:47:09,929 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 06:47:09,929 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:09,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:09,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1199259078, now seen corresponding path program 1 times [2022-01-10 06:47:09,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:09,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27611631] [2022-01-10 06:47:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:09,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:09,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:09,931 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 06:47:09,932 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 06:47:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:10,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:10,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:10,116 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 06:47:10,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:10,116 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:10,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27611631] [2022-01-10 06:47:10,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27611631] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:10,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:10,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:10,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638487628] [2022-01-10 06:47:10,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:10,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:10,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:10,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:10,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:10,117 INFO L87 Difference]: Start difference. First operand 3083 states and 4801 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:10,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:10,252 INFO L93 Difference]: Finished difference Result 9037 states and 14064 transitions. [2022-01-10 06:47:10,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:10,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-01-10 06:47:10,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:10,267 INFO L225 Difference]: With dead ends: 9037 [2022-01-10 06:47:10,268 INFO L226 Difference]: Without dead ends: 5995 [2022-01-10 06:47:10,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:10,272 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 364 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:10,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 444 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:10,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2022-01-10 06:47:10,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 5993. [2022-01-10 06:47:10,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5993 states, 5992 states have (on average 1.5397196261682242) internal successors, (9226), 5992 states have internal predecessors, (9226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5993 states to 5993 states and 9226 transitions. [2022-01-10 06:47:10,402 INFO L78 Accepts]: Start accepts. Automaton has 5993 states and 9226 transitions. Word has length 73 [2022-01-10 06:47:10,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:10,402 INFO L470 AbstractCegarLoop]: Abstraction has 5993 states and 9226 transitions. [2022-01-10 06:47:10,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:10,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5993 states and 9226 transitions. [2022-01-10 06:47:10,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 06:47:10,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:10,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:10,410 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 06:47:10,610 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 06:47:10,610 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:10,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:10,611 INFO L85 PathProgramCache]: Analyzing trace with hash -994296201, now seen corresponding path program 1 times [2022-01-10 06:47:10,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:10,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600381790] [2022-01-10 06:47:10,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:10,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:10,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:10,612 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 06:47:10,613 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 06:47:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:10,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:10,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:10,761 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 06:47:10,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:10,761 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:10,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600381790] [2022-01-10 06:47:10,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600381790] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:10,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:10,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:10,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478241788] [2022-01-10 06:47:10,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:10,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:10,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:10,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:10,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:10,762 INFO L87 Difference]: Start difference. First operand 5993 states and 9226 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:10,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:10,875 INFO L93 Difference]: Finished difference Result 10498 states and 16134 transitions. [2022-01-10 06:47:10,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:10,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-01-10 06:47:10,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:10,897 INFO L225 Difference]: With dead ends: 10498 [2022-01-10 06:47:10,897 INFO L226 Difference]: Without dead ends: 4554 [2022-01-10 06:47:10,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:10,907 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 47 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:10,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 589 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:10,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2022-01-10 06:47:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 4553. [2022-01-10 06:47:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4552 states have (on average 1.531634446397188) internal successors, (6972), 4552 states have internal predecessors, (6972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:11,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 6972 transitions. [2022-01-10 06:47:11,023 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 6972 transitions. Word has length 73 [2022-01-10 06:47:11,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:11,024 INFO L470 AbstractCegarLoop]: Abstraction has 4553 states and 6972 transitions. [2022-01-10 06:47:11,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 6972 transitions. [2022-01-10 06:47:11,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 06:47:11,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:11,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:11,034 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 06:47:11,232 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 06:47:11,232 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:11,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:11,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1311372683, now seen corresponding path program 1 times [2022-01-10 06:47:11,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:11,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145748239] [2022-01-10 06:47:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:11,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:11,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:11,234 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 06:47:11,266 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 06:47:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:11,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:47:11,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:11,397 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 06:47:11,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:11,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:11,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145748239] [2022-01-10 06:47:11,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145748239] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:11,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:11,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:47:11,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579492705] [2022-01-10 06:47:11,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:11,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:47:11,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:47:11,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:11,398 INFO L87 Difference]: Start difference. First operand 4553 states and 6972 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:11,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:11,529 INFO L93 Difference]: Finished difference Result 12144 states and 18935 transitions. [2022-01-10 06:47:11,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:47:11,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-01-10 06:47:11,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:11,541 INFO L225 Difference]: With dead ends: 12144 [2022-01-10 06:47:11,541 INFO L226 Difference]: Without dead ends: 8092 [2022-01-10 06:47:11,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:11,546 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 81 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:11,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 352 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:11,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8092 states. [2022-01-10 06:47:11,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8092 to 8090. [2022-01-10 06:47:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8090 states, 8089 states have (on average 1.53949808381753) internal successors, (12453), 8089 states have internal predecessors, (12453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:11,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8090 states to 8090 states and 12453 transitions. [2022-01-10 06:47:11,710 INFO L78 Accepts]: Start accepts. Automaton has 8090 states and 12453 transitions. Word has length 75 [2022-01-10 06:47:11,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:11,710 INFO L470 AbstractCegarLoop]: Abstraction has 8090 states and 12453 transitions. [2022-01-10 06:47:11,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:11,710 INFO L276 IsEmpty]: Start isEmpty. Operand 8090 states and 12453 transitions. [2022-01-10 06:47:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 06:47:11,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:11,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:11,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:11,918 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 06:47:11,918 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:11,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:11,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1994583226, now seen corresponding path program 1 times [2022-01-10 06:47:11,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:11,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277246719] [2022-01-10 06:47:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:11,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:11,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:11,920 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 06:47:11,921 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 06:47:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:12,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:12,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:12,122 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 06:47:12,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:12,122 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:12,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277246719] [2022-01-10 06:47:12,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277246719] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:12,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:12,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:12,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17064650] [2022-01-10 06:47:12,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:12,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:12,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:12,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:12,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:12,124 INFO L87 Difference]: Start difference. First operand 8090 states and 12453 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:12,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:12,352 INFO L93 Difference]: Finished difference Result 21196 states and 32624 transitions. [2022-01-10 06:47:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:12,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-10 06:47:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:12,377 INFO L225 Difference]: With dead ends: 21196 [2022-01-10 06:47:12,377 INFO L226 Difference]: Without dead ends: 13193 [2022-01-10 06:47:12,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:12,388 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 396 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:12,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 371 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:12,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13193 states. [2022-01-10 06:47:12,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13193 to 13191. [2022-01-10 06:47:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13191 states, 13190 states have (on average 1.5210007581501137) internal successors, (20062), 13190 states have internal predecessors, (20062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13191 states to 13191 states and 20062 transitions. [2022-01-10 06:47:12,714 INFO L78 Accepts]: Start accepts. Automaton has 13191 states and 20062 transitions. Word has length 77 [2022-01-10 06:47:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:12,714 INFO L470 AbstractCegarLoop]: Abstraction has 13191 states and 20062 transitions. [2022-01-10 06:47:12,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 13191 states and 20062 transitions. [2022-01-10 06:47:12,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 06:47:12,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:12,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:12,725 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 06:47:12,923 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 06:47:12,923 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:12,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:12,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1358664692, now seen corresponding path program 1 times [2022-01-10 06:47:12,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:12,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876143890] [2022-01-10 06:47:12,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:12,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:12,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:12,925 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 06:47:12,926 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 06:47:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:13,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:13,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:13,112 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 06:47:13,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:13,113 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:13,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876143890] [2022-01-10 06:47:13,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876143890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:13,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:13,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:13,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633418880] [2022-01-10 06:47:13,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:13,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:13,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:13,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:13,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:13,114 INFO L87 Difference]: Start difference. First operand 13191 states and 20062 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:13,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:13,291 INFO L93 Difference]: Finished difference Result 20183 states and 30701 transitions. [2022-01-10 06:47:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:13,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-10 06:47:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:13,311 INFO L225 Difference]: With dead ends: 20183 [2022-01-10 06:47:13,311 INFO L226 Difference]: Without dead ends: 11494 [2022-01-10 06:47:13,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:13,322 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 47 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:13,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 580 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:13,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11494 states. [2022-01-10 06:47:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11494 to 11494. [2022-01-10 06:47:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11494 states, 11493 states have (on average 1.5179674584529714) internal successors, (17446), 11493 states have internal predecessors, (17446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11494 states to 11494 states and 17446 transitions. [2022-01-10 06:47:13,605 INFO L78 Accepts]: Start accepts. Automaton has 11494 states and 17446 transitions. Word has length 77 [2022-01-10 06:47:13,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:13,605 INFO L470 AbstractCegarLoop]: Abstraction has 11494 states and 17446 transitions. [2022-01-10 06:47:13,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:13,605 INFO L276 IsEmpty]: Start isEmpty. Operand 11494 states and 17446 transitions. [2022-01-10 06:47:13,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 06:47:13,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:13,607 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:13,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:13,813 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 06:47:13,814 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:13,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:13,814 INFO L85 PathProgramCache]: Analyzing trace with hash 150493366, now seen corresponding path program 1 times [2022-01-10 06:47:13,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:13,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73160784] [2022-01-10 06:47:13,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:13,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:13,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:13,816 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 06:47:13,818 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 06:47:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:13,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:47:13,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:13,950 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 06:47:13,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:13,950 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:13,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73160784] [2022-01-10 06:47:13,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73160784] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:13,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:13,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:47:13,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327987238] [2022-01-10 06:47:13,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:13,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:47:13,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:13,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:47:13,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:13,953 INFO L87 Difference]: Start difference. First operand 11494 states and 17446 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:14,274 INFO L93 Difference]: Finished difference Result 31424 states and 47834 transitions. [2022-01-10 06:47:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:47:14,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-10 06:47:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:14,312 INFO L225 Difference]: With dead ends: 31424 [2022-01-10 06:47:14,313 INFO L226 Difference]: Without dead ends: 22886 [2022-01-10 06:47:14,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:14,328 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 154 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:14,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 510 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22886 states. [2022-01-10 06:47:14,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22886 to 11504. [2022-01-10 06:47:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11504 states, 11503 states have (on average 1.5175171694340608) internal successors, (17456), 11503 states have internal predecessors, (17456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:14,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11504 states to 11504 states and 17456 transitions. [2022-01-10 06:47:14,719 INFO L78 Accepts]: Start accepts. Automaton has 11504 states and 17456 transitions. Word has length 78 [2022-01-10 06:47:14,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:14,719 INFO L470 AbstractCegarLoop]: Abstraction has 11504 states and 17456 transitions. [2022-01-10 06:47:14,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:14,719 INFO L276 IsEmpty]: Start isEmpty. Operand 11504 states and 17456 transitions. [2022-01-10 06:47:14,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 06:47:14,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:14,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:14,730 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 06:47:14,928 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 06:47:14,928 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:14,929 INFO L85 PathProgramCache]: Analyzing trace with hash 384835178, now seen corresponding path program 1 times [2022-01-10 06:47:14,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:14,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323048401] [2022-01-10 06:47:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:14,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:14,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:14,930 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 06:47:14,951 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 06:47:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:14,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:47:14,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:15,090 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 06:47:15,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:15,090 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:15,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323048401] [2022-01-10 06:47:15,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323048401] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:15,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:15,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:47:15,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537125902] [2022-01-10 06:47:15,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:15,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:47:15,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:15,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:47:15,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:15,092 INFO L87 Difference]: Start difference. First operand 11504 states and 17456 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:15,423 INFO L93 Difference]: Finished difference Result 21602 states and 33129 transitions. [2022-01-10 06:47:15,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:47:15,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-10 06:47:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:15,446 INFO L225 Difference]: With dead ends: 21602 [2022-01-10 06:47:15,446 INFO L226 Difference]: Without dead ends: 15810 [2022-01-10 06:47:15,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:15,456 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 84 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:15,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 405 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:15,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15810 states. [2022-01-10 06:47:15,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15810 to 15808. [2022-01-10 06:47:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15808 states, 15807 states have (on average 1.5164167773771113) internal successors, (23970), 15807 states have internal predecessors, (23970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15808 states to 15808 states and 23970 transitions. [2022-01-10 06:47:15,838 INFO L78 Accepts]: Start accepts. Automaton has 15808 states and 23970 transitions. Word has length 78 [2022-01-10 06:47:15,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:15,838 INFO L470 AbstractCegarLoop]: Abstraction has 15808 states and 23970 transitions. [2022-01-10 06:47:15,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 15808 states and 23970 transitions. [2022-01-10 06:47:15,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 06:47:15,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:15,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:15,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:16,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:16,047 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:16,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:16,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2026068107, now seen corresponding path program 1 times [2022-01-10 06:47:16,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:16,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673270589] [2022-01-10 06:47:16,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:16,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:16,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:16,049 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:16,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:47:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:16,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:16,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:16,212 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 06:47:16,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:16,212 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:16,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673270589] [2022-01-10 06:47:16,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673270589] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:16,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:16,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:16,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363571591] [2022-01-10 06:47:16,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:16,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:16,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:16,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:16,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:16,213 INFO L87 Difference]: Start difference. First operand 15808 states and 23970 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:16,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:16,748 INFO L93 Difference]: Finished difference Result 40852 states and 61920 transitions. [2022-01-10 06:47:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:16,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 06:47:16,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:16,785 INFO L225 Difference]: With dead ends: 40852 [2022-01-10 06:47:16,785 INFO L226 Difference]: Without dead ends: 25198 [2022-01-10 06:47:16,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:16,795 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 345 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:16,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 426 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25198 states. [2022-01-10 06:47:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25198 to 25196. [2022-01-10 06:47:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25196 states, 25195 states have (on average 1.4993451081563802) internal successors, (37776), 25195 states have internal predecessors, (37776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25196 states to 25196 states and 37776 transitions. [2022-01-10 06:47:17,486 INFO L78 Accepts]: Start accepts. Automaton has 25196 states and 37776 transitions. Word has length 79 [2022-01-10 06:47:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:17,487 INFO L470 AbstractCegarLoop]: Abstraction has 25196 states and 37776 transitions. [2022-01-10 06:47:17,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:17,487 INFO L276 IsEmpty]: Start isEmpty. Operand 25196 states and 37776 transitions. [2022-01-10 06:47:17,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 06:47:17,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:17,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:17,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-01-10 06:47:17,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:17,697 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:17,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:17,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1037970342, now seen corresponding path program 1 times [2022-01-10 06:47:17,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:17,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757091489] [2022-01-10 06:47:17,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:17,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:17,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:17,699 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:17,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:47:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:17,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:17,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:17,858 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 06:47:17,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:17,858 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:17,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757091489] [2022-01-10 06:47:17,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757091489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:17,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:17,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:17,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375696555] [2022-01-10 06:47:17,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:17,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:17,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:17,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:17,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:17,860 INFO L87 Difference]: Start difference. First operand 25196 states and 37776 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:18,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:18,434 INFO L93 Difference]: Finished difference Result 35835 states and 53772 transitions. [2022-01-10 06:47:18,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:18,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 06:47:18,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:18,460 INFO L225 Difference]: With dead ends: 35835 [2022-01-10 06:47:18,460 INFO L226 Difference]: Without dead ends: 21717 [2022-01-10 06:47:18,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:18,471 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 21 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:18,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 556 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:18,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21717 states. [2022-01-10 06:47:19,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21717 to 21717. [2022-01-10 06:47:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21717 states, 21716 states have (on average 1.496454227297845) internal successors, (32497), 21716 states have internal predecessors, (32497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:19,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21717 states to 21717 states and 32497 transitions. [2022-01-10 06:47:19,051 INFO L78 Accepts]: Start accepts. Automaton has 21717 states and 32497 transitions. Word has length 79 [2022-01-10 06:47:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:19,051 INFO L470 AbstractCegarLoop]: Abstraction has 21717 states and 32497 transitions. [2022-01-10 06:47:19,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:19,051 INFO L276 IsEmpty]: Start isEmpty. Operand 21717 states and 32497 transitions. [2022-01-10 06:47:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 06:47:19,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:19,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:19,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-01-10 06:47:19,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:19,254 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:19,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:19,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1760005626, now seen corresponding path program 1 times [2022-01-10 06:47:19,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:19,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43284618] [2022-01-10 06:47:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:19,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:19,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:19,256 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:19,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:47:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:19,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:47:19,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:19,669 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 06:47:19,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:19,669 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:19,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43284618] [2022-01-10 06:47:19,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43284618] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:19,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:19,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:47:19,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415579715] [2022-01-10 06:47:19,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:19,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:47:19,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:19,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:47:19,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:19,670 INFO L87 Difference]: Start difference. First operand 21717 states and 32497 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:21,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:21,122 INFO L93 Difference]: Finished difference Result 83483 states and 127199 transitions. [2022-01-10 06:47:21,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:47:21,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 06:47:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:21,239 INFO L225 Difference]: With dead ends: 83483 [2022-01-10 06:47:21,239 INFO L226 Difference]: Without dead ends: 62799 [2022-01-10 06:47:21,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:21,262 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 359 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:21,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 849 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:47:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62799 states. [2022-01-10 06:47:22,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62799 to 53489. [2022-01-10 06:47:22,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53489 states, 53488 states have (on average 1.4936621298235118) internal successors, (79893), 53488 states have internal predecessors, (79893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:23,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53489 states to 53489 states and 79893 transitions. [2022-01-10 06:47:23,039 INFO L78 Accepts]: Start accepts. Automaton has 53489 states and 79893 transitions. Word has length 81 [2022-01-10 06:47:23,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:23,039 INFO L470 AbstractCegarLoop]: Abstraction has 53489 states and 79893 transitions. [2022-01-10 06:47:23,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 53489 states and 79893 transitions. [2022-01-10 06:47:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 06:47:23,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:23,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:23,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:23,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:23,242 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:23,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1097734209, now seen corresponding path program 1 times [2022-01-10 06:47:23,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:23,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388514610] [2022-01-10 06:47:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:23,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:23,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:23,244 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:23,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:47:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:23,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:23,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:23,509 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 06:47:23,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:23,509 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:23,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388514610] [2022-01-10 06:47:23,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388514610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:23,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:23,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:23,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075397932] [2022-01-10 06:47:23,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:23,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:23,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:23,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:23,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:23,511 INFO L87 Difference]: Start difference. First operand 53489 states and 79893 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:26,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:26,040 INFO L93 Difference]: Finished difference Result 147841 states and 223454 transitions. [2022-01-10 06:47:26,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:26,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-01-10 06:47:26,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:26,198 INFO L225 Difference]: With dead ends: 147841 [2022-01-10 06:47:26,198 INFO L226 Difference]: Without dead ends: 95385 [2022-01-10 06:47:26,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:26,236 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 328 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:26,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 439 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:26,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95385 states. [2022-01-10 06:47:28,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95385 to 85699. [2022-01-10 06:47:28,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85699 states, 85698 states have (on average 1.495472473103223) internal successors, (128159), 85698 states have internal predecessors, (128159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85699 states to 85699 states and 128159 transitions. [2022-01-10 06:47:28,861 INFO L78 Accepts]: Start accepts. Automaton has 85699 states and 128159 transitions. Word has length 82 [2022-01-10 06:47:28,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:28,861 INFO L470 AbstractCegarLoop]: Abstraction has 85699 states and 128159 transitions. [2022-01-10 06:47:28,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:28,861 INFO L276 IsEmpty]: Start isEmpty. Operand 85699 states and 128159 transitions. [2022-01-10 06:47:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 06:47:28,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:28,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:28,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:29,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:29,064 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:29,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:29,064 INFO L85 PathProgramCache]: Analyzing trace with hash -2083806191, now seen corresponding path program 1 times [2022-01-10 06:47:29,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:29,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833220207] [2022-01-10 06:47:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:29,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:29,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:29,066 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:29,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 06:47:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:29,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:29,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:29,321 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 06:47:29,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:29,322 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:29,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833220207] [2022-01-10 06:47:29,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833220207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:29,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:29,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:29,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189507298] [2022-01-10 06:47:29,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:29,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:29,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:29,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:29,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:29,323 INFO L87 Difference]: Start difference. First operand 85699 states and 128159 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:33,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:33,227 INFO L93 Difference]: Finished difference Result 226929 states and 341170 transitions. [2022-01-10 06:47:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:33,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-01-10 06:47:33,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:33,535 INFO L225 Difference]: With dead ends: 226929 [2022-01-10 06:47:33,535 INFO L226 Difference]: Without dead ends: 142263 [2022-01-10 06:47:33,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:33,599 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 242 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:33,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 587 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:47:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142263 states. [2022-01-10 06:47:37,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142263 to 132397. [2022-01-10 06:47:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132397 states, 132396 states have (on average 1.4857624097404756) internal successors, (196709), 132396 states have internal predecessors, (196709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132397 states to 132397 states and 196709 transitions. [2022-01-10 06:47:37,998 INFO L78 Accepts]: Start accepts. Automaton has 132397 states and 196709 transitions. Word has length 83 [2022-01-10 06:47:37,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:37,998 INFO L470 AbstractCegarLoop]: Abstraction has 132397 states and 196709 transitions. [2022-01-10 06:47:37,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:37,998 INFO L276 IsEmpty]: Start isEmpty. Operand 132397 states and 196709 transitions. [2022-01-10 06:47:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 06:47:38,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:38,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:38,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:38,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:38,202 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:38,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:38,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1758306440, now seen corresponding path program 1 times [2022-01-10 06:47:38,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:38,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885989556] [2022-01-10 06:47:38,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:38,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:38,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:38,204 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:38,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 06:47:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:38,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:38,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:38,451 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 06:47:38,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:38,452 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:38,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885989556] [2022-01-10 06:47:38,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885989556] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:38,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:38,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:38,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914364492] [2022-01-10 06:47:38,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:38,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:38,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:38,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:38,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:38,453 INFO L87 Difference]: Start difference. First operand 132397 states and 196709 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:45,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:45,657 INFO L93 Difference]: Finished difference Result 388909 states and 578138 transitions. [2022-01-10 06:47:45,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:45,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-01-10 06:47:45,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:46,240 INFO L225 Difference]: With dead ends: 388909 [2022-01-10 06:47:46,240 INFO L226 Difference]: Without dead ends: 257545 [2022-01-10 06:47:46,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:46,340 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 324 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:46,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 435 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:47:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257545 states. [2022-01-10 06:47:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257545 to 194231. [2022-01-10 06:47:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194231 states, 194230 states have (on average 1.4721670184832416) internal successors, (285939), 194230 states have internal predecessors, (285939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:53,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194231 states to 194231 states and 285939 transitions. [2022-01-10 06:47:53,580 INFO L78 Accepts]: Start accepts. Automaton has 194231 states and 285939 transitions. Word has length 84 [2022-01-10 06:47:53,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:53,581 INFO L470 AbstractCegarLoop]: Abstraction has 194231 states and 285939 transitions. [2022-01-10 06:47:53,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:53,581 INFO L276 IsEmpty]: Start isEmpty. Operand 194231 states and 285939 transitions. [2022-01-10 06:47:53,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-10 06:47:53,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:53,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:53,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:53,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:53,790 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:53,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:53,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1561363380, now seen corresponding path program 1 times [2022-01-10 06:47:53,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:53,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864103906] [2022-01-10 06:47:53,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:53,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:53,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:53,792 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:53,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 06:47:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:53,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:47:53,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:54,166 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 06:47:54,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:54,166 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:54,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864103906] [2022-01-10 06:47:54,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864103906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:54,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:54,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:47:54,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701475208] [2022-01-10 06:47:54,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:54,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:47:54,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:54,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:47:54,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:54,167 INFO L87 Difference]: Start difference. First operand 194231 states and 285939 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:48:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:48:03,345 INFO L93 Difference]: Finished difference Result 516351 states and 766455 transitions. [2022-01-10 06:48:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:48:03,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-01-10 06:48:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:48:04,115 INFO L225 Difference]: With dead ends: 516351 [2022-01-10 06:48:04,115 INFO L226 Difference]: Without dead ends: 323153 [2022-01-10 06:48:04,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:48:04,257 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 434 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:48:04,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 669 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:48:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323153 states.