/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:34:24,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:34:24,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:34:24,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 00:34:24,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:34:24,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:34:24,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:34:24,644 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 00:34:24,668 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:34:24,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:34:24,669 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:34:24,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:34:24,669 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:34:24,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:34:24,670 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:34:24,670 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:34:24,670 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:34:24,670 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:34:24,670 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:34:24,671 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:34:24,671 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:34:24,671 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:34:24,671 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:34:24,671 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:34:24,671 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:34:24,671 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:34:24,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:34:24,671 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:34:24,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:34:24,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:34:24,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:34:24,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:34:24,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:34:24,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:34:24,672 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:34:24,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:34:24,673 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:34:24,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:34:24,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:34:24,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:34:24,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:34:24,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:34:24,673 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:34:24,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:34:24,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:34:24,673 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:34:24,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:34:24,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:34:24,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:34:24,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:34:24,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:34:24,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:34:24,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:34:24,855 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:34:24,855 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:34:24,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-01 00:34:25,919 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:34:26,113 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:34:26,114 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-01 00:34:26,119 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0bd4d925/12a693ed29694bea94f795e650897e95/FLAG9403b9b82 [2023-04-01 00:34:26,505 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0bd4d925/12a693ed29694bea94f795e650897e95 [2023-04-01 00:34:26,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:34:26,508 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:34:26,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:34:26,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:34:26,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:34:26,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:34:26" (1/1) ... [2023-04-01 00:34:26,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c27a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:26, skipping insertion in model container [2023-04-01 00:34:26,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:34:26" (1/1) ... [2023-04-01 00:34:26,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:34:26,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:34:26,659 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4900,4913] [2023-04-01 00:34:26,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:34:26,698 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:34:26,731 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4900,4913] [2023-04-01 00:34:26,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:34:26,758 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:34:26,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:26 WrapperNode [2023-04-01 00:34:26,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:34:26,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:34:26,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:34:26,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:34:26,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:26" (1/1) ... [2023-04-01 00:34:26,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:26" (1/1) ... [2023-04-01 00:34:26,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:26" (1/1) ... [2023-04-01 00:34:26,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:26" (1/1) ... [2023-04-01 00:34:26,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:26" (1/1) ... [2023-04-01 00:34:26,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:26" (1/1) ... [2023-04-01 00:34:26,809 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:26" (1/1) ... [2023-04-01 00:34:26,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:26" (1/1) ... [2023-04-01 00:34:26,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:34:26,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:34:26,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:34:26,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:34:26,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:26" (1/1) ... [2023-04-01 00:34:26,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:34:26,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:34:26,848 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) [2023-04-01 00:34:26,865 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 [2023-04-01 00:34:26,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:34:26,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:34:26,879 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:34:26,879 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 00:34:26,879 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:34:26,879 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:34:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:34:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:34:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:34:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:34:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:34:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:34:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 00:34:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:34:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:34:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:34:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:34:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:34:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 00:34:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:34:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:34:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:34:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:34:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:34:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:34:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:34:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:34:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:34:27,039 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:34:27,041 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:34:27,375 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:34:27,435 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:34:27,435 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 00:34:27,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:34:27 BoogieIcfgContainer [2023-04-01 00:34:27,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:34:27,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:34:27,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:34:27,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:34:27,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:34:26" (1/3) ... [2023-04-01 00:34:27,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ea3f82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:34:27, skipping insertion in model container [2023-04-01 00:34:27,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:26" (2/3) ... [2023-04-01 00:34:27,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ea3f82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:34:27, skipping insertion in model container [2023-04-01 00:34:27,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:34:27" (3/3) ... [2023-04-01 00:34:27,443 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-01 00:34:27,454 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:34:27,454 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 00:34:27,487 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:34:27,492 INFO L357 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=FINITE_AUTOMATA, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1bc2d315, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:34:27,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 00:34:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 62 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 00:34:27,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 00:34:27,502 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:34:27,503 INFO L195 NwaCegarLoop]: 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] [2023-04-01 00:34:27,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:34:27,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:34:27,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1716017800, now seen corresponding path program 1 times [2023-04-01 00:34:27,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:34:27,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510112392] [2023-04-01 00:34:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:34:27,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:34:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:34:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:34:27,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:34:27,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510112392] [2023-04-01 00:34:27,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510112392] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:34:27,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:34:27,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:34:27,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637657067] [2023-04-01 00:34:27,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:34:27,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:34:27,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:34:27,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:34:27,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:34:27,807 INFO L87 Difference]: Start difference. First operand has 67 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 62 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:27,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:34:27,854 INFO L93 Difference]: Finished difference Result 139 states and 209 transitions. [2023-04-01 00:34:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:34:27,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-04-01 00:34:27,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:34:27,862 INFO L225 Difference]: With dead ends: 139 [2023-04-01 00:34:27,862 INFO L226 Difference]: Without dead ends: 91 [2023-04-01 00:34:27,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:34:27,870 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 71 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:34:27,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 188 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:34:27,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-04-01 00:34:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2023-04-01 00:34:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.3411764705882352) internal successors, (114), 85 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2023-04-01 00:34:27,903 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 42 [2023-04-01 00:34:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:34:27,904 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2023-04-01 00:34:27,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:27,904 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2023-04-01 00:34:27,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 00:34:27,905 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:34:27,905 INFO L195 NwaCegarLoop]: 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] [2023-04-01 00:34:27,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:34:27,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:34:27,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:34:27,906 INFO L85 PathProgramCache]: Analyzing trace with hash -2022530969, now seen corresponding path program 1 times [2023-04-01 00:34:27,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:34:27,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818827839] [2023-04-01 00:34:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:34:27,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:34:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:34:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:34:28,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:34:28,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818827839] [2023-04-01 00:34:28,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818827839] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:34:28,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:34:28,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:34:28,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743128831] [2023-04-01 00:34:28,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:34:28,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:34:28,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:34:28,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:34:28,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:34:28,013 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:28,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:34:28,062 INFO L93 Difference]: Finished difference Result 201 states and 281 transitions. [2023-04-01 00:34:28,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:34:28,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-01 00:34:28,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:34:28,063 INFO L225 Difference]: With dead ends: 201 [2023-04-01 00:34:28,064 INFO L226 Difference]: Without dead ends: 141 [2023-04-01 00:34:28,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:34:28,065 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 42 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:34:28,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 145 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:34:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-04-01 00:34:28,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2023-04-01 00:34:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 135 states have (on average 1.385185185185185) internal successors, (187), 135 states have internal predecessors, (187), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 190 transitions. [2023-04-01 00:34:28,098 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 190 transitions. Word has length 45 [2023-04-01 00:34:28,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:34:28,098 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 190 transitions. [2023-04-01 00:34:28,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:28,099 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 190 transitions. [2023-04-01 00:34:28,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 00:34:28,101 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:34:28,102 INFO L195 NwaCegarLoop]: 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] [2023-04-01 00:34:28,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:34:28,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:34:28,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:34:28,102 INFO L85 PathProgramCache]: Analyzing trace with hash 325783197, now seen corresponding path program 1 times [2023-04-01 00:34:28,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:34:28,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133225960] [2023-04-01 00:34:28,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:34:28,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:34:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:34:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:34:28,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:34:28,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133225960] [2023-04-01 00:34:28,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133225960] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:34:28,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:34:28,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:34:28,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494604255] [2023-04-01 00:34:28,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:34:28,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:34:28,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:34:28,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:34:28,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:34:28,215 INFO L87 Difference]: Start difference. First operand 139 states and 190 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:28,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:34:28,255 INFO L93 Difference]: Finished difference Result 343 states and 488 transitions. [2023-04-01 00:34:28,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:34:28,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-04-01 00:34:28,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:34:28,258 INFO L225 Difference]: With dead ends: 343 [2023-04-01 00:34:28,258 INFO L226 Difference]: Without dead ends: 233 [2023-04-01 00:34:28,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:34:28,260 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:34:28,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 141 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:34:28,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-04-01 00:34:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 231. [2023-04-01 00:34:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 227 states have (on average 1.4052863436123348) internal successors, (319), 227 states have internal predecessors, (319), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 322 transitions. [2023-04-01 00:34:28,289 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 322 transitions. Word has length 48 [2023-04-01 00:34:28,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:34:28,290 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 322 transitions. [2023-04-01 00:34:28,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 322 transitions. [2023-04-01 00:34:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 00:34:28,291 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:34:28,292 INFO L195 NwaCegarLoop]: 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] [2023-04-01 00:34:28,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:34:28,292 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:34:28,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:34:28,294 INFO L85 PathProgramCache]: Analyzing trace with hash 2081810987, now seen corresponding path program 1 times [2023-04-01 00:34:28,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:34:28,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955174220] [2023-04-01 00:34:28,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:34:28,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:34:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:34:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:34:28,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:34:28,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955174220] [2023-04-01 00:34:28,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955174220] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:34:28,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:34:28,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:34:28,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938565990] [2023-04-01 00:34:28,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:34:28,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:34:28,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:34:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:34:28,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:34:28,379 INFO L87 Difference]: Start difference. First operand 231 states and 322 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:28,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:34:28,445 INFO L93 Difference]: Finished difference Result 603 states and 860 transitions. [2023-04-01 00:34:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:34:28,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-04-01 00:34:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:34:28,448 INFO L225 Difference]: With dead ends: 603 [2023-04-01 00:34:28,448 INFO L226 Difference]: Without dead ends: 401 [2023-04-01 00:34:28,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:34:28,459 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 32 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:34:28,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 137 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:34:28,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-04-01 00:34:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 399. [2023-04-01 00:34:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 395 states have (on average 1.4050632911392404) internal successors, (555), 395 states have internal predecessors, (555), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 558 transitions. [2023-04-01 00:34:28,524 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 558 transitions. Word has length 51 [2023-04-01 00:34:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:34:28,525 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 558 transitions. [2023-04-01 00:34:28,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 558 transitions. [2023-04-01 00:34:28,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 00:34:28,527 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:34:28,527 INFO L195 NwaCegarLoop]: 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] [2023-04-01 00:34:28,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:34:28,528 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:34:28,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:34:28,528 INFO L85 PathProgramCache]: Analyzing trace with hash 516280431, now seen corresponding path program 1 times [2023-04-01 00:34:28,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:34:28,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672646057] [2023-04-01 00:34:28,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:34:28,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:34:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:34:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:34:28,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:34:28,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672646057] [2023-04-01 00:34:28,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672646057] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:34:28,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:34:28,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 00:34:28,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221573097] [2023-04-01 00:34:28,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:34:28,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 00:34:28,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:34:28,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 00:34:28,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 00:34:28,668 INFO L87 Difference]: Start difference. First operand 399 states and 558 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:34:29,016 INFO L93 Difference]: Finished difference Result 1609 states and 2283 transitions. [2023-04-01 00:34:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 00:34:29,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-01 00:34:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:34:29,025 INFO L225 Difference]: With dead ends: 1609 [2023-04-01 00:34:29,025 INFO L226 Difference]: Without dead ends: 1239 [2023-04-01 00:34:29,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:34:29,031 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 357 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:34:29,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 739 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:34:29,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2023-04-01 00:34:29,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 571. [2023-04-01 00:34:29,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 567 states have (on average 1.3932980599647267) internal successors, (790), 567 states have internal predecessors, (790), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 793 transitions. [2023-04-01 00:34:29,118 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 793 transitions. Word has length 54 [2023-04-01 00:34:29,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:34:29,120 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 793 transitions. [2023-04-01 00:34:29,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:29,120 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 793 transitions. [2023-04-01 00:34:29,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 00:34:29,121 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:34:29,122 INFO L195 NwaCegarLoop]: 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] [2023-04-01 00:34:29,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:34:29,122 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:34:29,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:34:29,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1331062442, now seen corresponding path program 1 times [2023-04-01 00:34:29,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:34:29,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136563953] [2023-04-01 00:34:29,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:34:29,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:34:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:34:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:34:29,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:34:29,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136563953] [2023-04-01 00:34:29,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136563953] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:34:29,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:34:29,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:34:29,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74553286] [2023-04-01 00:34:29,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:34:29,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:34:29,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:34:29,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:34:29,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:34:29,201 INFO L87 Difference]: Start difference. First operand 571 states and 793 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:29,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:34:29,336 INFO L93 Difference]: Finished difference Result 1441 states and 2031 transitions. [2023-04-01 00:34:29,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:34:29,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-01 00:34:29,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:34:29,340 INFO L225 Difference]: With dead ends: 1441 [2023-04-01 00:34:29,340 INFO L226 Difference]: Without dead ends: 899 [2023-04-01 00:34:29,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:34:29,342 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 26 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:34:29,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:34:29,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2023-04-01 00:34:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 897. [2023-04-01 00:34:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.4042553191489362) internal successors, (1254), 893 states have internal predecessors, (1254), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1257 transitions. [2023-04-01 00:34:29,477 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1257 transitions. Word has length 56 [2023-04-01 00:34:29,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:34:29,478 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1257 transitions. [2023-04-01 00:34:29,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1257 transitions. [2023-04-01 00:34:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 00:34:29,479 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:34:29,479 INFO L195 NwaCegarLoop]: 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] [2023-04-01 00:34:29,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:34:29,479 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:34:29,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:34:29,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1351111785, now seen corresponding path program 1 times [2023-04-01 00:34:29,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:34:29,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219285781] [2023-04-01 00:34:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:34:29,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:34:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:34:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:34:29,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:34:29,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219285781] [2023-04-01 00:34:29,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219285781] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:34:29,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:34:29,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 00:34:29,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345796425] [2023-04-01 00:34:29,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:34:29,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 00:34:29,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:34:29,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 00:34:29,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 00:34:29,669 INFO L87 Difference]: Start difference. First operand 897 states and 1257 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:29,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:34:29,851 INFO L93 Difference]: Finished difference Result 1765 states and 2484 transitions. [2023-04-01 00:34:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 00:34:29,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-01 00:34:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:34:29,854 INFO L225 Difference]: With dead ends: 1765 [2023-04-01 00:34:29,855 INFO L226 Difference]: Without dead ends: 899 [2023-04-01 00:34:29,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-04-01 00:34:29,857 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 90 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:34:29,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 209 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:34:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2023-04-01 00:34:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 897. [2023-04-01 00:34:29,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.4020156774916013) internal successors, (1252), 893 states have internal predecessors, (1252), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:29,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1255 transitions. [2023-04-01 00:34:29,956 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1255 transitions. Word has length 56 [2023-04-01 00:34:29,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:34:29,957 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1255 transitions. [2023-04-01 00:34:29,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:29,958 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1255 transitions. [2023-04-01 00:34:29,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 00:34:29,958 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:34:29,958 INFO L195 NwaCegarLoop]: 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] [2023-04-01 00:34:29,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:34:29,959 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:34:29,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:34:29,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1067117009, now seen corresponding path program 1 times [2023-04-01 00:34:29,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:34:29,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877681740] [2023-04-01 00:34:29,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:34:29,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:34:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:34:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:34:30,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:34:30,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877681740] [2023-04-01 00:34:30,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877681740] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:34:30,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:34:30,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:34:30,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610667361] [2023-04-01 00:34:30,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:34:30,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:34:30,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:34:30,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:34:30,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:34:30,057 INFO L87 Difference]: Start difference. First operand 897 states and 1255 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:30,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:34:30,200 INFO L93 Difference]: Finished difference Result 1763 states and 2479 transitions. [2023-04-01 00:34:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:34:30,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-01 00:34:30,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:34:30,203 INFO L225 Difference]: With dead ends: 1763 [2023-04-01 00:34:30,204 INFO L226 Difference]: Without dead ends: 897 [2023-04-01 00:34:30,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:34:30,206 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 182 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:34:30,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 53 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:34:30,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-04-01 00:34:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2023-04-01 00:34:30,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.366181410974244) internal successors, (1220), 893 states have internal predecessors, (1220), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1223 transitions. [2023-04-01 00:34:30,319 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1223 transitions. Word has length 57 [2023-04-01 00:34:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:34:30,320 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1223 transitions. [2023-04-01 00:34:30,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1223 transitions. [2023-04-01 00:34:30,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 00:34:30,320 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:34:30,320 INFO L195 NwaCegarLoop]: 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] [2023-04-01 00:34:30,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:34:30,320 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:34:30,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:34:30,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1829980716, now seen corresponding path program 1 times [2023-04-01 00:34:30,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:34:30,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937534059] [2023-04-01 00:34:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:34:30,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:34:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:34:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:34:30,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:34:30,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937534059] [2023-04-01 00:34:30,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937534059] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:34:30,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:34:30,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:34:30,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006708289] [2023-04-01 00:34:30,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:34:30,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:34:30,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:34:30,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:34:30,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:34:30,386 INFO L87 Difference]: Start difference. First operand 897 states and 1223 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:30,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:34:30,529 INFO L93 Difference]: Finished difference Result 1763 states and 2415 transitions. [2023-04-01 00:34:30,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:34:30,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-01 00:34:30,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:34:30,532 INFO L225 Difference]: With dead ends: 1763 [2023-04-01 00:34:30,532 INFO L226 Difference]: Without dead ends: 897 [2023-04-01 00:34:30,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:34:30,535 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 166 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:34:30,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 61 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:34:30,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-04-01 00:34:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2023-04-01 00:34:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.343784994400896) internal successors, (1200), 893 states have internal predecessors, (1200), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1203 transitions. [2023-04-01 00:34:30,684 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1203 transitions. Word has length 57 [2023-04-01 00:34:30,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:34:30,684 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1203 transitions. [2023-04-01 00:34:30,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:30,684 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1203 transitions. [2023-04-01 00:34:30,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 00:34:30,685 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:34:30,685 INFO L195 NwaCegarLoop]: 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] [2023-04-01 00:34:30,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 00:34:30,685 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:34:30,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:34:30,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1701895409, now seen corresponding path program 1 times [2023-04-01 00:34:30,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:34:30,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701306936] [2023-04-01 00:34:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:34:30,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:34:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:34:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:34:30,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:34:30,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701306936] [2023-04-01 00:34:30,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701306936] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:34:30,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:34:30,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:34:30,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537467346] [2023-04-01 00:34:30,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:34:30,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:34:30,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:34:30,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:34:30,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:34:30,751 INFO L87 Difference]: Start difference. First operand 897 states and 1203 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:34:30,895 INFO L93 Difference]: Finished difference Result 1763 states and 2375 transitions. [2023-04-01 00:34:30,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:34:30,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-01 00:34:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:34:30,898 INFO L225 Difference]: With dead ends: 1763 [2023-04-01 00:34:30,898 INFO L226 Difference]: Without dead ends: 897 [2023-04-01 00:34:30,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:34:30,899 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 137 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:34:30,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 77 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:34:30,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-04-01 00:34:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2023-04-01 00:34:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.3281075027995521) internal successors, (1186), 893 states have internal predecessors, (1186), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1189 transitions. [2023-04-01 00:34:31,022 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1189 transitions. Word has length 57 [2023-04-01 00:34:31,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:34:31,022 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1189 transitions. [2023-04-01 00:34:31,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:31,022 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1189 transitions. [2023-04-01 00:34:31,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 00:34:31,022 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:34:31,022 INFO L195 NwaCegarLoop]: 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] [2023-04-01 00:34:31,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 00:34:31,023 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:34:31,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:34:31,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2063781386, now seen corresponding path program 1 times [2023-04-01 00:34:31,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:34:31,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251635212] [2023-04-01 00:34:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:34:31,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:34:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:34:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:34:31,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:34:31,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251635212] [2023-04-01 00:34:31,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251635212] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:34:31,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:34:31,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:34:31,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618338196] [2023-04-01 00:34:31,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:34:31,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:34:31,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:34:31,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:34:31,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:34:31,165 INFO L87 Difference]: Start difference. First operand 897 states and 1189 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:31,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:34:31,412 INFO L93 Difference]: Finished difference Result 1448 states and 1906 transitions. [2023-04-01 00:34:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 00:34:31,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-01 00:34:31,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:34:31,416 INFO L225 Difference]: With dead ends: 1448 [2023-04-01 00:34:31,416 INFO L226 Difference]: Without dead ends: 1446 [2023-04-01 00:34:31,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 00:34:31,416 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 77 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:34:31,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 329 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:34:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2023-04-01 00:34:31,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 929. [2023-04-01 00:34:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 925 states have (on average 1.2908108108108107) internal successors, (1194), 925 states have internal predecessors, (1194), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:31,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1197 transitions. [2023-04-01 00:34:31,558 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1197 transitions. Word has length 57 [2023-04-01 00:34:31,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:34:31,558 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1197 transitions. [2023-04-01 00:34:31,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:34:31,558 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1197 transitions. [2023-04-01 00:34:31,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-01 00:34:31,562 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:34:31,562 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:34:31,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 00:34:31,562 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:34:31,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:34:31,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1629675188, now seen corresponding path program 1 times [2023-04-01 00:34:31,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:34:31,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313182173] [2023-04-01 00:34:31,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:34:31,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:34:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:34:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:34:34,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:34:34,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313182173] [2023-04-01 00:34:34,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313182173] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:34:34,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028074934] [2023-04-01 00:34:34,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:34:34,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:34:34,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:34:34,750 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 00:34:34,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 00:34:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:34:34,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 53 conjunts are in the unsatisfiable core [2023-04-01 00:34:34,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:34:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:34:39,415 INFO L327 TraceCheckSpWp]: Computing backward predicates...