/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-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:30:22,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:30:22,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:30:22,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 00:30:22,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:30:22,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:30:22,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:30:22,383 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 00:30:22,399 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:30:22,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:30:22,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:30:22,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:30:22,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:30:22,400 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:30:22,400 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:30:22,400 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:30:22,400 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:30:22,400 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:30:22,400 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:30:22,404 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:30:22,404 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:30:22,404 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:30:22,404 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:30:22,404 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:30:22,404 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:30:22,404 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:30:22,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:30:22,405 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:30:22,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:30:22,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:30:22,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:30:22,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:30:22,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:30:22,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:30:22,406 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:30:22,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:30:22,407 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:30:22,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:30:22,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:30:22,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:30:22,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:30:22,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:30:22,408 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:30:22,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:30:22,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:30:22,409 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:30:22,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:30:22,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:30:22,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:30:22,409 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:30:22,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:30:22,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:30:22,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:30:22,610 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:30:22,610 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:30:22,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 00:30:23,656 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:30:23,788 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:30:23,788 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 00:30:23,795 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8625d1278/2be25846be104380ab7e5ee2cfc48f65/FLAGfe9c249d0 [2023-04-01 00:30:23,806 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8625d1278/2be25846be104380ab7e5ee2cfc48f65 [2023-04-01 00:30:23,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:30:23,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:30:23,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:30:23,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:30:23,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:30:23,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:30:23" (1/1) ... [2023-04-01 00:30:23,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28925005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:23, skipping insertion in model container [2023-04-01 00:30:23,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:30:23" (1/1) ... [2023-04-01 00:30:23,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:30:23,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:30:23,974 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-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6358,6371] [2023-04-01 00:30:23,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:30:24,004 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:30:24,032 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-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6358,6371] [2023-04-01 00:30:24,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:30:24,057 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:30:24,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:24 WrapperNode [2023-04-01 00:30:24,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:30:24,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:30:24,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:30:24,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:30:24,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:24" (1/1) ... [2023-04-01 00:30:24,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:24" (1/1) ... [2023-04-01 00:30:24,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:24" (1/1) ... [2023-04-01 00:30:24,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:24" (1/1) ... [2023-04-01 00:30:24,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:24" (1/1) ... [2023-04-01 00:30:24,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:24" (1/1) ... [2023-04-01 00:30:24,095 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:24" (1/1) ... [2023-04-01 00:30:24,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:24" (1/1) ... [2023-04-01 00:30:24,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:30:24,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:30:24,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:30:24,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:30:24,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:24" (1/1) ... [2023-04-01 00:30:24,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:30:24,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:30:24,121 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 00:30:24,126 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 00:30:24,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:30:24,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:30:24,142 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:30:24,142 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 00:30:24,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:30:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:30:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:30:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:30:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:30:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:30:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:30:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 00:30:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:30:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 00:30:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:30:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:30:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:30:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:30:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:30:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 00:30:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 00:30:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:30:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:30:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:30:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:30:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:30:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:30:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:30:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:30:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:30:24,225 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:30:24,226 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:30:24,650 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:30:24,792 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:30:24,792 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 00:30:24,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:30:24 BoogieIcfgContainer [2023-04-01 00:30:24,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:30:24,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:30:24,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:30:24,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:30:24,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:30:23" (1/3) ... [2023-04-01 00:30:24,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18658f2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:30:24, skipping insertion in model container [2023-04-01 00:30:24,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:24" (2/3) ... [2023-04-01 00:30:24,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18658f2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:30:24, skipping insertion in model container [2023-04-01 00:30:24,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:30:24" (3/3) ... [2023-04-01 00:30:24,803 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 00:30:24,814 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:30:24,814 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 00:30:24,859 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:30:24,864 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;@2f6953b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:30:24,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 00:30:24,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 105 states have (on average 1.6666666666666667) internal successors, (175), 106 states have internal predecessors, (175), 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 00:30:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 00:30:24,878 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:24,879 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 00:30:24,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:24,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:24,885 INFO L85 PathProgramCache]: Analyzing trace with hash -521045099, now seen corresponding path program 1 times [2023-04-01 00:30:24,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:24,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605203557] [2023-04-01 00:30:24,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:24,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:25,232 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 00:30:25,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:25,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605203557] [2023-04-01 00:30:25,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605203557] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:25,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:25,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:30:25,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157605581] [2023-04-01 00:30:25,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:25,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:30:25,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:25,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:30:25,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:30:25,258 INFO L87 Difference]: Start difference. First operand has 111 states, 105 states have (on average 1.6666666666666667) internal successors, (175), 106 states have internal predecessors, (175), 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 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 00:30:25,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:25,369 INFO L93 Difference]: Finished difference Result 246 states and 378 transitions. [2023-04-01 00:30:25,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:30:25,372 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 00:30:25,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:25,381 INFO L225 Difference]: With dead ends: 246 [2023-04-01 00:30:25,382 INFO L226 Difference]: Without dead ends: 165 [2023-04-01 00:30:25,384 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 00:30:25,389 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 133 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:25,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 346 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:30:25,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-04-01 00:30:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2023-04-01 00:30:25,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 159 states have (on average 1.4088050314465408) internal successors, (224), 159 states have internal predecessors, (224), 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 00:30:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 227 transitions. [2023-04-01 00:30:25,455 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 227 transitions. Word has length 51 [2023-04-01 00:30:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:25,456 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 227 transitions. [2023-04-01 00:30:25,456 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 00:30:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 227 transitions. [2023-04-01 00:30:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 00:30:25,460 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:25,461 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 00:30:25,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:30:25,461 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:25,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:25,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1094660447, now seen corresponding path program 1 times [2023-04-01 00:30:25,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:25,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463708727] [2023-04-01 00:30:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:25,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:25,626 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 00:30:25,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:25,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463708727] [2023-04-01 00:30:25,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463708727] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:25,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:25,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:30:25,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650559890] [2023-04-01 00:30:25,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:25,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:30:25,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:25,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:30:25,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:30:25,630 INFO L87 Difference]: Start difference. First operand 163 states and 227 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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 00:30:25,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:25,695 INFO L93 Difference]: Finished difference Result 391 states and 571 transitions. [2023-04-01 00:30:25,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:30:25,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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 00:30:25,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:25,697 INFO L225 Difference]: With dead ends: 391 [2023-04-01 00:30:25,697 INFO L226 Difference]: Without dead ends: 266 [2023-04-01 00:30:25,698 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 00:30:25,698 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 98 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:25,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 284 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:30:25,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-04-01 00:30:25,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2023-04-01 00:30:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 260 states have (on average 1.4461538461538461) internal successors, (376), 260 states have internal predecessors, (376), 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 00:30:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 379 transitions. [2023-04-01 00:30:25,735 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 379 transitions. Word has length 54 [2023-04-01 00:30:25,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:25,736 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 379 transitions. [2023-04-01 00:30:25,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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 00:30:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 379 transitions. [2023-04-01 00:30:25,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 00:30:25,738 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:25,738 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 00:30:25,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:30:25,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:25,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:25,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2147091130, now seen corresponding path program 1 times [2023-04-01 00:30:25,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:25,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654573594] [2023-04-01 00:30:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:25,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:25,831 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 00:30:25,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:25,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654573594] [2023-04-01 00:30:25,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654573594] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:25,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:25,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:30:25,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652504834] [2023-04-01 00:30:25,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:25,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:30:25,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:25,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:30:25,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:30:25,834 INFO L87 Difference]: Start difference. First operand 264 states and 379 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 00:30:25,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:25,891 INFO L93 Difference]: Finished difference Result 672 states and 993 transitions. [2023-04-01 00:30:25,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:30:25,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 00:30:25,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:25,895 INFO L225 Difference]: With dead ends: 672 [2023-04-01 00:30:25,895 INFO L226 Difference]: Without dead ends: 446 [2023-04-01 00:30:25,900 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 00:30:25,902 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 93 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:25,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 269 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:30:25,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-04-01 00:30:25,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 444. [2023-04-01 00:30:25,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 440 states have (on average 1.4636363636363636) internal successors, (644), 440 states have internal predecessors, (644), 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 00:30:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 647 transitions. [2023-04-01 00:30:25,947 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 647 transitions. Word has length 57 [2023-04-01 00:30:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:25,948 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 647 transitions. [2023-04-01 00:30:25,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 00:30:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 647 transitions. [2023-04-01 00:30:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 00:30:25,953 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:25,953 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, 1, 1, 1] [2023-04-01 00:30:25,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:30:25,953 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:25,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:25,954 INFO L85 PathProgramCache]: Analyzing trace with hash -918469248, now seen corresponding path program 1 times [2023-04-01 00:30:25,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:25,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28161616] [2023-04-01 00:30:25,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:25,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:26,038 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 00:30:26,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:26,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28161616] [2023-04-01 00:30:26,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28161616] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:26,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:26,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:30:26,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793440941] [2023-04-01 00:30:26,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:26,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:30:26,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:26,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:30:26,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:30:26,040 INFO L87 Difference]: Start difference. First operand 444 states and 647 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 00:30:26,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:26,145 INFO L93 Difference]: Finished difference Result 1168 states and 1729 transitions. [2023-04-01 00:30:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:30:26,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 60 [2023-04-01 00:30:26,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:26,148 INFO L225 Difference]: With dead ends: 1168 [2023-04-01 00:30:26,148 INFO L226 Difference]: Without dead ends: 762 [2023-04-01 00:30:26,149 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 00:30:26,157 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 88 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:26,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 254 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:30:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2023-04-01 00:30:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 760. [2023-04-01 00:30:26,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 756 states have (on average 1.4656084656084656) internal successors, (1108), 756 states have internal predecessors, (1108), 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 00:30:26,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1111 transitions. [2023-04-01 00:30:26,240 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1111 transitions. Word has length 60 [2023-04-01 00:30:26,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:26,241 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 1111 transitions. [2023-04-01 00:30:26,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 00:30:26,241 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1111 transitions. [2023-04-01 00:30:26,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-01 00:30:26,243 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:26,243 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, 1, 1, 1, 1, 1, 1] [2023-04-01 00:30:26,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:30:26,243 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:26,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash 968774137, now seen corresponding path program 1 times [2023-04-01 00:30:26,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:26,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29763798] [2023-04-01 00:30:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:26,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:26,319 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 00:30:26,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:26,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29763798] [2023-04-01 00:30:26,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29763798] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:26,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:26,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:30:26,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527744948] [2023-04-01 00:30:26,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:26,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:30:26,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:26,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:30:26,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:30:26,323 INFO L87 Difference]: Start difference. First operand 760 states and 1111 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 00:30:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:26,484 INFO L93 Difference]: Finished difference Result 2028 states and 2985 transitions. [2023-04-01 00:30:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:30:26,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 63 [2023-04-01 00:30:26,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:26,489 INFO L225 Difference]: With dead ends: 2028 [2023-04-01 00:30:26,490 INFO L226 Difference]: Without dead ends: 1306 [2023-04-01 00:30:26,491 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 00:30:26,491 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 83 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:26,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 239 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:30:26,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2023-04-01 00:30:26,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1304. [2023-04-01 00:30:26,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1300 states have (on average 1.4553846153846153) internal successors, (1892), 1300 states have internal predecessors, (1892), 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 00:30:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1895 transitions. [2023-04-01 00:30:26,607 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1895 transitions. Word has length 63 [2023-04-01 00:30:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:26,607 INFO L495 AbstractCegarLoop]: Abstraction has 1304 states and 1895 transitions. [2023-04-01 00:30:26,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 00:30:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1895 transitions. [2023-04-01 00:30:26,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 00:30:26,608 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:26,608 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:30:26,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:30:26,608 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:26,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:26,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1881619641, now seen corresponding path program 1 times [2023-04-01 00:30:26,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:26,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606381796] [2023-04-01 00:30:26,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:26,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:26,809 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 00:30:26,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:26,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606381796] [2023-04-01 00:30:26,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606381796] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:26,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:26,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:30:26,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904924508] [2023-04-01 00:30:26,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:26,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:30:26,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:26,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:30:26,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:30:26,811 INFO L87 Difference]: Start difference. First operand 1304 states and 1895 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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 00:30:27,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:27,698 INFO L93 Difference]: Finished difference Result 6594 states and 9580 transitions. [2023-04-01 00:30:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 00:30:27,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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 66 [2023-04-01 00:30:27,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:27,714 INFO L225 Difference]: With dead ends: 6594 [2023-04-01 00:30:27,714 INFO L226 Difference]: Without dead ends: 5328 [2023-04-01 00:30:27,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:30:27,717 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 428 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:27,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 1029 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:30:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2023-04-01 00:30:28,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 5320. [2023-04-01 00:30:28,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5320 states, 5316 states have (on average 1.4484574868322047) internal successors, (7700), 5316 states have internal predecessors, (7700), 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 00:30:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5320 states to 5320 states and 7703 transitions. [2023-04-01 00:30:28,646 INFO L78 Accepts]: Start accepts. Automaton has 5320 states and 7703 transitions. Word has length 66 [2023-04-01 00:30:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:28,647 INFO L495 AbstractCegarLoop]: Abstraction has 5320 states and 7703 transitions. [2023-04-01 00:30:28,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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 00:30:28,647 INFO L276 IsEmpty]: Start isEmpty. Operand 5320 states and 7703 transitions. [2023-04-01 00:30:28,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 00:30:28,648 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:28,648 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:30:28,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:30:28,648 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:28,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:28,648 INFO L85 PathProgramCache]: Analyzing trace with hash 420553744, now seen corresponding path program 1 times [2023-04-01 00:30:28,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:28,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225873502] [2023-04-01 00:30:28,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:28,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:28,721 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 00:30:28,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:28,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225873502] [2023-04-01 00:30:28,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225873502] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:28,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:28,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:30:28,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52025522] [2023-04-01 00:30:28,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:28,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:30:28,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:28,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:30:28,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:30:28,723 INFO L87 Difference]: Start difference. First operand 5320 states and 7703 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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 00:30:29,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:29,857 INFO L93 Difference]: Finished difference Result 13646 states and 19859 transitions. [2023-04-01 00:30:29,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:30:29,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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 68 [2023-04-01 00:30:29,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:29,881 INFO L225 Difference]: With dead ends: 13646 [2023-04-01 00:30:29,881 INFO L226 Difference]: Without dead ends: 8364 [2023-04-01 00:30:29,888 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 00:30:29,888 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 562 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:29,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 142 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:30:29,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8364 states. [2023-04-01 00:30:30,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8364 to 8362. [2023-04-01 00:30:30,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8362 states, 8358 states have (on average 1.4412538884900694) internal successors, (12046), 8358 states have internal predecessors, (12046), 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 00:30:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8362 states to 8362 states and 12049 transitions. [2023-04-01 00:30:30,901 INFO L78 Accepts]: Start accepts. Automaton has 8362 states and 12049 transitions. Word has length 68 [2023-04-01 00:30:30,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:30,901 INFO L495 AbstractCegarLoop]: Abstraction has 8362 states and 12049 transitions. [2023-04-01 00:30:30,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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 00:30:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 8362 states and 12049 transitions. [2023-04-01 00:30:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 00:30:30,902 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:30,902 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:30:30,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:30:30,903 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:30,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:30,903 INFO L85 PathProgramCache]: Analyzing trace with hash 556314955, now seen corresponding path program 1 times [2023-04-01 00:30:30,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:30,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305582642] [2023-04-01 00:30:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:30,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:31,177 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 00:30:31,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:31,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305582642] [2023-04-01 00:30:31,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305582642] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:31,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:31,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 00:30:31,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139347998] [2023-04-01 00:30:31,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:31,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 00:30:31,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:31,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 00:30:31,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-04-01 00:30:31,179 INFO L87 Difference]: Start difference. First operand 8362 states and 12049 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 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 00:30:33,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:33,461 INFO L93 Difference]: Finished difference Result 15836 states and 22899 transitions. [2023-04-01 00:30:33,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:30:33,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 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 68 [2023-04-01 00:30:33,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:33,503 INFO L225 Difference]: With dead ends: 15836 [2023-04-01 00:30:33,504 INFO L226 Difference]: Without dead ends: 15834 [2023-04-01 00:30:33,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-04-01 00:30:33,511 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 1320 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 2370 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:33,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1320 Valid, 2370 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:30:33,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15834 states. [2023-04-01 00:30:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15834 to 8750. [2023-04-01 00:30:34,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8750 states, 8746 states have (on average 1.4418019666133088) internal successors, (12610), 8746 states have internal predecessors, (12610), 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 00:30:34,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8750 states to 8750 states and 12613 transitions. [2023-04-01 00:30:34,668 INFO L78 Accepts]: Start accepts. Automaton has 8750 states and 12613 transitions. Word has length 68 [2023-04-01 00:30:34,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:34,668 INFO L495 AbstractCegarLoop]: Abstraction has 8750 states and 12613 transitions. [2023-04-01 00:30:34,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 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 00:30:34,669 INFO L276 IsEmpty]: Start isEmpty. Operand 8750 states and 12613 transitions. [2023-04-01 00:30:34,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 00:30:34,671 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:34,671 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:30:34,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:30:34,671 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:34,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:34,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1539081457, now seen corresponding path program 1 times [2023-04-01 00:30:34,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:34,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635325735] [2023-04-01 00:30:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:34,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:30:35,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:35,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635325735] [2023-04-01 00:30:35,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635325735] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:30:35,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765226900] [2023-04-01 00:30:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:35,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:30:35,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:30:35,854 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 00:30:35,892 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 00:30:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:36,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 66 conjunts are in the unsatisfiable core [2023-04-01 00:30:36,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:30:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:30:38,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 00:31:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:31:01,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765226900] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 00:31:01,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [494627796] [2023-04-01 00:31:01,327 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-04-01 00:31:01,328 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 00:31:01,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 00:31:01,341 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 00:31:01,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 00:31:01,877 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 176 for LOIs [2023-04-01 00:31:16,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 148 for LOIs [2023-04-01 00:31:16,359 INFO L180 IcfgInterpreter]: Interpretation finished