/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.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:27:16,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:27:16,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:27:16,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 00:27:16,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:27:16,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:27:16,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:27:16,277 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 00:27:16,297 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:27:16,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:27:16,297 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:27:16,298 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:27:16,298 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:27:16,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:27:16,298 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:27:16,298 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:27:16,298 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:27:16,299 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:27:16,299 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:27:16,299 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:27:16,299 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:27:16,299 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:27:16,299 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:27:16,299 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:27:16,299 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:27:16,299 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:27:16,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:27:16,300 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:27:16,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:27:16,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:27:16,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:27:16,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:27:16,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:27:16,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:27:16,300 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:27:16,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:27:16,300 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:27:16,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:27:16,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:27:16,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:27:16,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:27:16,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:27:16,301 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:27:16,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:27:16,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:27:16,301 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:27:16,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:27:16,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:27:16,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:27:16,301 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:27:16,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:27:16,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:27:16,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:27:16,521 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:27:16,522 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:27:16,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2023-04-01 00:27:17,461 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:27:17,637 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:27:17,638 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2023-04-01 00:27:17,645 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b0843f2e/a5b0931116704d4f96f1d56e9b770795/FLAGafa8047a6 [2023-04-01 00:27:17,655 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b0843f2e/a5b0931116704d4f96f1d56e9b770795 [2023-04-01 00:27:17,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:27:17,658 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:27:17,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:27:17,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:27:17,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:27:17,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:27:17" (1/1) ... [2023-04-01 00:27:17,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eb55f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:17, skipping insertion in model container [2023-04-01 00:27:17,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:27:17" (1/1) ... [2023-04-01 00:27:17,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:27:17,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:27:17,823 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.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7471,7484] [2023-04-01 00:27:17,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:27:17,856 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:27:17,886 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.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7471,7484] [2023-04-01 00:27:17,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:27:17,914 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:27:17,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:17 WrapperNode [2023-04-01 00:27:17,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:27:17,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:27:17,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:27:17,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:27:17,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:17" (1/1) ... [2023-04-01 00:27:17,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:17" (1/1) ... [2023-04-01 00:27:17,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:17" (1/1) ... [2023-04-01 00:27:17,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:17" (1/1) ... [2023-04-01 00:27:17,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:17" (1/1) ... [2023-04-01 00:27:17,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:17" (1/1) ... [2023-04-01 00:27:17,950 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:17" (1/1) ... [2023-04-01 00:27:17,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:17" (1/1) ... [2023-04-01 00:27:17,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:27:17,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:27:17,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:27:17,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:27:17,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:17" (1/1) ... [2023-04-01 00:27:17,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:27:17,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:27:17,989 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 00:27:17,996 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 00:27:18,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:27:18,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:27:18,017 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:27:18,017 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 00:27:18,017 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:27:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:27:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:27:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:27:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:27:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:27:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:27:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:27:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 00:27:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:27:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:27:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:27:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:27:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:27:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:27:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:27:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:27:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:27:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:27:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:27:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:27:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:27:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:27:18,098 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:27:18,099 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:27:18,538 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:27:18,655 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:27:18,655 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 00:27:18,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:27:18 BoogieIcfgContainer [2023-04-01 00:27:18,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:27:18,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:27:18,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:27:18,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:27:18,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:27:17" (1/3) ... [2023-04-01 00:27:18,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc5f671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:27:18, skipping insertion in model container [2023-04-01 00:27:18,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:17" (2/3) ... [2023-04-01 00:27:18,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc5f671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:27:18, skipping insertion in model container [2023-04-01 00:27:18,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:27:18" (3/3) ... [2023-04-01 00:27:18,665 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2023-04-01 00:27:18,678 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:27:18,679 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 00:27:18,724 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:27:18,730 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;@bf41cab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:27:18,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 00:27:18,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 113 states, 107 states have (on average 1.6822429906542056) internal successors, (180), 108 states have internal predecessors, (180), 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 00:27:18,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 00:27:18,741 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:18,742 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] [2023-04-01 00:27:18,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:18,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:18,747 INFO L85 PathProgramCache]: Analyzing trace with hash -2047482956, now seen corresponding path program 1 times [2023-04-01 00:27:18,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:18,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237431225] [2023-04-01 00:27:18,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:18,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:19,231 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 00:27:19,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:19,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237431225] [2023-04-01 00:27:19,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237431225] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:19,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:19,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:27:19,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846804086] [2023-04-01 00:27:19,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:19,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:27:19,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:19,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:27:19,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:19,273 INFO L87 Difference]: Start difference. First operand has 113 states, 107 states have (on average 1.6822429906542056) internal successors, (180), 108 states have internal predecessors, (180), 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 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 00:27:19,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:19,481 INFO L93 Difference]: Finished difference Result 308 states and 483 transitions. [2023-04-01 00:27:19,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:27:19,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 46 [2023-04-01 00:27:19,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:19,492 INFO L225 Difference]: With dead ends: 308 [2023-04-01 00:27:19,492 INFO L226 Difference]: Without dead ends: 224 [2023-04-01 00:27:19,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:19,497 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 424 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:19,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 526 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:27:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-04-01 00:27:19,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2023-04-01 00:27:19,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 216 states have (on average 1.3472222222222223) internal successors, (291), 216 states have internal predecessors, (291), 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 00:27:19,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 294 transitions. [2023-04-01 00:27:19,565 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 294 transitions. Word has length 46 [2023-04-01 00:27:19,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:19,565 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 294 transitions. [2023-04-01 00:27:19,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 00:27:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 294 transitions. [2023-04-01 00:27:19,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 00:27:19,567 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:19,567 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] [2023-04-01 00:27:19,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:27:19,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:19,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:19,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1490111410, now seen corresponding path program 1 times [2023-04-01 00:27:19,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:19,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786852420] [2023-04-01 00:27:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:19,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:19,701 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 00:27:19,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:19,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786852420] [2023-04-01 00:27:19,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786852420] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:19,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:19,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:27:19,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619414795] [2023-04-01 00:27:19,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:19,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:27:19,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:19,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:27:19,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:19,705 INFO L87 Difference]: Start difference. First operand 220 states and 294 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 00:27:19,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:19,886 INFO L93 Difference]: Finished difference Result 491 states and 673 transitions. [2023-04-01 00:27:19,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:27:19,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 47 [2023-04-01 00:27:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:19,891 INFO L225 Difference]: With dead ends: 491 [2023-04-01 00:27:19,891 INFO L226 Difference]: Without dead ends: 314 [2023-04-01 00:27:19,899 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 00:27:19,901 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 346 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:19,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 162 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:27:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-04-01 00:27:19,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2023-04-01 00:27:19,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 308 states have (on average 1.3636363636363635) internal successors, (420), 308 states have internal predecessors, (420), 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 00:27:19,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 423 transitions. [2023-04-01 00:27:19,951 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 423 transitions. Word has length 47 [2023-04-01 00:27:19,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:19,951 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 423 transitions. [2023-04-01 00:27:19,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 00:27:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 423 transitions. [2023-04-01 00:27:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 00:27:19,958 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:19,958 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] [2023-04-01 00:27:19,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:27:19,958 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:19,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:19,959 INFO L85 PathProgramCache]: Analyzing trace with hash 24193857, now seen corresponding path program 1 times [2023-04-01 00:27:19,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:19,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005467738] [2023-04-01 00:27:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:19,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:20,069 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 00:27:20,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:20,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005467738] [2023-04-01 00:27:20,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005467738] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:20,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:20,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:27:20,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637603901] [2023-04-01 00:27:20,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:20,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:27:20,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:20,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:27:20,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:20,072 INFO L87 Difference]: Start difference. First operand 312 states and 423 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 00:27:20,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:20,246 INFO L93 Difference]: Finished difference Result 747 states and 1039 transitions. [2023-04-01 00:27:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:27:20,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 47 [2023-04-01 00:27:20,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:20,248 INFO L225 Difference]: With dead ends: 747 [2023-04-01 00:27:20,248 INFO L226 Difference]: Without dead ends: 498 [2023-04-01 00:27:20,249 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 00:27:20,250 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 329 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:20,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 170 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:27:20,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2023-04-01 00:27:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2023-04-01 00:27:20,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 492 states have (on average 1.3800813008130082) internal successors, (679), 492 states have internal predecessors, (679), 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 00:27:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 682 transitions. [2023-04-01 00:27:20,319 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 682 transitions. Word has length 47 [2023-04-01 00:27:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:20,319 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 682 transitions. [2023-04-01 00:27:20,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 00:27:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 682 transitions. [2023-04-01 00:27:20,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 00:27:20,320 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:20,320 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] [2023-04-01 00:27:20,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:27:20,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:20,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:20,321 INFO L85 PathProgramCache]: Analyzing trace with hash 785706537, now seen corresponding path program 1 times [2023-04-01 00:27:20,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:20,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69287236] [2023-04-01 00:27:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:20,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:20,758 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 00:27:20,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:20,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69287236] [2023-04-01 00:27:20,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69287236] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:20,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:20,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 00:27:20,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558038997] [2023-04-01 00:27:20,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:20,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 00:27:20,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:20,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 00:27:20,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-01 00:27:20,760 INFO L87 Difference]: Start difference. First operand 496 states and 682 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 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 00:27:21,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:21,222 INFO L93 Difference]: Finished difference Result 1355 states and 1890 transitions. [2023-04-01 00:27:21,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 00:27:21,222 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 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 00:27:21,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:21,226 INFO L225 Difference]: With dead ends: 1355 [2023-04-01 00:27:21,226 INFO L226 Difference]: Without dead ends: 1143 [2023-04-01 00:27:21,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-04-01 00:27:21,227 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 1233 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:21,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 562 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:27:21,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2023-04-01 00:27:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 776. [2023-04-01 00:27:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 772 states have (on average 1.3678756476683938) internal successors, (1056), 772 states have internal predecessors, (1056), 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 00:27:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1059 transitions. [2023-04-01 00:27:21,358 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1059 transitions. Word has length 48 [2023-04-01 00:27:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:21,358 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 1059 transitions. [2023-04-01 00:27:21,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 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 00:27:21,359 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1059 transitions. [2023-04-01 00:27:21,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 00:27:21,359 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:21,359 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 00:27:21,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:27:21,360 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:21,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:21,360 INFO L85 PathProgramCache]: Analyzing trace with hash -729513335, now seen corresponding path program 1 times [2023-04-01 00:27:21,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:21,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554721904] [2023-04-01 00:27:21,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:21,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:21,678 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 00:27:21,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:21,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554721904] [2023-04-01 00:27:21,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554721904] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:21,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:21,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 00:27:21,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104726399] [2023-04-01 00:27:21,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:21,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 00:27:21,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:21,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 00:27:21,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:27:21,680 INFO L87 Difference]: Start difference. First operand 776 states and 1059 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 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 00:27:22,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:22,471 INFO L93 Difference]: Finished difference Result 1385 states and 1887 transitions. [2023-04-01 00:27:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:27:22,471 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 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 00:27:22,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:22,475 INFO L225 Difference]: With dead ends: 1385 [2023-04-01 00:27:22,475 INFO L226 Difference]: Without dead ends: 1311 [2023-04-01 00:27:22,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2023-04-01 00:27:22,477 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 995 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:22,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [995 Valid, 991 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:27:22,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2023-04-01 00:27:22,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1061. [2023-04-01 00:27:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1057 states have (on average 1.358561967833491) internal successors, (1436), 1057 states have internal predecessors, (1436), 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 00:27:22,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1439 transitions. [2023-04-01 00:27:22,633 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1439 transitions. Word has length 48 [2023-04-01 00:27:22,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:22,634 INFO L495 AbstractCegarLoop]: Abstraction has 1061 states and 1439 transitions. [2023-04-01 00:27:22,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 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 00:27:22,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1439 transitions. [2023-04-01 00:27:22,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 00:27:22,635 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:22,636 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 00:27:22,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:27:22,636 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:22,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:22,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1078739952, now seen corresponding path program 1 times [2023-04-01 00:27:22,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:22,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872524838] [2023-04-01 00:27:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:22,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:22,697 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 00:27:22,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:22,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872524838] [2023-04-01 00:27:22,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872524838] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:22,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:22,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:27:22,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485552411] [2023-04-01 00:27:22,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:22,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:27:22,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:22,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:27:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:22,699 INFO L87 Difference]: Start difference. First operand 1061 states and 1439 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 00:27:22,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:22,912 INFO L93 Difference]: Finished difference Result 1519 states and 2079 transitions. [2023-04-01 00:27:22,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:27:22,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 48 [2023-04-01 00:27:22,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:22,916 INFO L225 Difference]: With dead ends: 1519 [2023-04-01 00:27:22,916 INFO L226 Difference]: Without dead ends: 1061 [2023-04-01 00:27:22,917 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 00:27:22,917 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 291 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:22,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 132 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:27:22,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2023-04-01 00:27:23,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 1061. [2023-04-01 00:27:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1057 states have (on average 1.3576158940397351) internal successors, (1435), 1057 states have internal predecessors, (1435), 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 00:27:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1438 transitions. [2023-04-01 00:27:23,062 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1438 transitions. Word has length 48 [2023-04-01 00:27:23,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:23,062 INFO L495 AbstractCegarLoop]: Abstraction has 1061 states and 1438 transitions. [2023-04-01 00:27:23,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 00:27:23,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1438 transitions. [2023-04-01 00:27:23,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 00:27:23,063 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:23,063 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] [2023-04-01 00:27:23,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:27:23,063 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:23,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:23,064 INFO L85 PathProgramCache]: Analyzing trace with hash 721244060, now seen corresponding path program 1 times [2023-04-01 00:27:23,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:23,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497031272] [2023-04-01 00:27:23,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:23,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:23,351 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 00:27:23,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:23,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497031272] [2023-04-01 00:27:23,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497031272] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:23,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:23,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 00:27:23,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884148354] [2023-04-01 00:27:23,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:23,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 00:27:23,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:23,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 00:27:23,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-04-01 00:27:23,353 INFO L87 Difference]: Start difference. First operand 1061 states and 1438 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 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 00:27:24,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:24,214 INFO L93 Difference]: Finished difference Result 3138 states and 4419 transitions. [2023-04-01 00:27:24,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 00:27:24,214 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 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 49 [2023-04-01 00:27:24,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:24,223 INFO L225 Difference]: With dead ends: 3138 [2023-04-01 00:27:24,223 INFO L226 Difference]: Without dead ends: 2768 [2023-04-01 00:27:24,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2023-04-01 00:27:24,225 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 944 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:24,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [944 Valid, 809 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:27:24,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2023-04-01 00:27:24,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 1968. [2023-04-01 00:27:24,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1964 states have (on average 1.374236252545825) internal successors, (2699), 1964 states have internal predecessors, (2699), 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 00:27:24,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2702 transitions. [2023-04-01 00:27:24,469 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2702 transitions. Word has length 49 [2023-04-01 00:27:24,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:24,469 INFO L495 AbstractCegarLoop]: Abstraction has 1968 states and 2702 transitions. [2023-04-01 00:27:24,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 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 00:27:24,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2702 transitions. [2023-04-01 00:27:24,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 00:27:24,470 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:24,470 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] [2023-04-01 00:27:24,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:27:24,470 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:24,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:24,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1043676226, now seen corresponding path program 1 times [2023-04-01 00:27:24,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:24,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931738020] [2023-04-01 00:27:24,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:24,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:24,811 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 00:27:24,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:24,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931738020] [2023-04-01 00:27:24,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931738020] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:24,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:24,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 00:27:24,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417804814] [2023-04-01 00:27:24,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:24,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 00:27:24,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:24,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 00:27:24,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-04-01 00:27:24,813 INFO L87 Difference]: Start difference. First operand 1968 states and 2702 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 00:27:25,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:25,737 INFO L93 Difference]: Finished difference Result 4397 states and 6069 transitions. [2023-04-01 00:27:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 00:27:25,737 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 50 [2023-04-01 00:27:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:25,749 INFO L225 Difference]: With dead ends: 4397 [2023-04-01 00:27:25,749 INFO L226 Difference]: Without dead ends: 4329 [2023-04-01 00:27:25,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2023-04-01 00:27:25,751 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 503 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:25,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1151 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:27:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4329 states. [2023-04-01 00:27:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4329 to 1980. [2023-04-01 00:27:26,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1976 states have (on average 1.3719635627530364) internal successors, (2711), 1976 states have internal predecessors, (2711), 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 00:27:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 2714 transitions. [2023-04-01 00:27:26,031 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 2714 transitions. Word has length 50 [2023-04-01 00:27:26,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:26,032 INFO L495 AbstractCegarLoop]: Abstraction has 1980 states and 2714 transitions. [2023-04-01 00:27:26,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 00:27:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 2714 transitions. [2023-04-01 00:27:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 00:27:26,032 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:26,032 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 00:27:26,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:27:26,033 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:26,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:26,033 INFO L85 PathProgramCache]: Analyzing trace with hash 568147805, now seen corresponding path program 1 times [2023-04-01 00:27:26,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:26,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297984034] [2023-04-01 00:27:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:26,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:26,063 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 00:27:26,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:26,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297984034] [2023-04-01 00:27:26,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297984034] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:26,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:26,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:26,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012641784] [2023-04-01 00:27:26,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:26,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:26,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:26,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:26,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:26,064 INFO L87 Difference]: Start difference. First operand 1980 states and 2714 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 00:27:26,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:26,404 INFO L93 Difference]: Finished difference Result 3476 states and 4813 transitions. [2023-04-01 00:27:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:26,405 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 00:27:26,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:26,410 INFO L225 Difference]: With dead ends: 3476 [2023-04-01 00:27:26,410 INFO L226 Difference]: Without dead ends: 1928 [2023-04-01 00:27:26,413 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 00:27:26,413 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 72 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:26,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 235 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:26,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2023-04-01 00:27:26,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1901. [2023-04-01 00:27:26,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1897 states have (on average 1.3674222456510279) internal successors, (2594), 1897 states have internal predecessors, (2594), 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 00:27:26,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 2597 transitions. [2023-04-01 00:27:26,675 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 2597 transitions. Word has length 51 [2023-04-01 00:27:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:26,675 INFO L495 AbstractCegarLoop]: Abstraction has 1901 states and 2597 transitions. [2023-04-01 00:27:26,675 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 00:27:26,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 2597 transitions. [2023-04-01 00:27:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 00:27:26,676 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:26,676 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 00:27:26,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 00:27:26,676 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:26,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:26,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1347354607, now seen corresponding path program 1 times [2023-04-01 00:27:26,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:26,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729577768] [2023-04-01 00:27:26,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:26,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:26,985 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 00:27:26,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:26,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729577768] [2023-04-01 00:27:26,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729577768] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:26,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:26,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 00:27:26,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728966554] [2023-04-01 00:27:26,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:26,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 00:27:26,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:26,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 00:27:26,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-04-01 00:27:26,987 INFO L87 Difference]: Start difference. First operand 1901 states and 2597 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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 00:27:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:27,834 INFO L93 Difference]: Finished difference Result 4332 states and 5972 transitions. [2023-04-01 00:27:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 00:27:27,834 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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 00:27:27,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:27,844 INFO L225 Difference]: With dead ends: 4332 [2023-04-01 00:27:27,845 INFO L226 Difference]: Without dead ends: 3932 [2023-04-01 00:27:27,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2023-04-01 00:27:27,846 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 407 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:27,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 1077 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:27:27,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2023-04-01 00:27:28,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 2654. [2023-04-01 00:27:28,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2650 states have (on average 1.3743396226415094) internal successors, (3642), 2650 states have internal predecessors, (3642), 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 00:27:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3645 transitions. [2023-04-01 00:27:28,272 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3645 transitions. Word has length 51 [2023-04-01 00:27:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:28,272 INFO L495 AbstractCegarLoop]: Abstraction has 2654 states and 3645 transitions. [2023-04-01 00:27:28,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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 00:27:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3645 transitions. [2023-04-01 00:27:28,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 00:27:28,273 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:28,273 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 00:27:28,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 00:27:28,273 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:28,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:28,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1432392817, now seen corresponding path program 1 times [2023-04-01 00:27:28,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:28,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40016881] [2023-04-01 00:27:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:28,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:28,635 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 00:27:28,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:28,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40016881] [2023-04-01 00:27:28,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40016881] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:28,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:28,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 00:27:28,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963335496] [2023-04-01 00:27:28,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:28,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 00:27:28,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:28,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 00:27:28,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-04-01 00:27:28,637 INFO L87 Difference]: Start difference. First operand 2654 states and 3645 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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 00:27:29,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:29,563 INFO L93 Difference]: Finished difference Result 3733 states and 5117 transitions. [2023-04-01 00:27:29,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 00:27:29,564 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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 00:27:29,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:29,574 INFO L225 Difference]: With dead ends: 3733 [2023-04-01 00:27:29,574 INFO L226 Difference]: Without dead ends: 3665 [2023-04-01 00:27:29,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2023-04-01 00:27:29,575 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 309 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:29,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 854 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:27:29,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2023-04-01 00:27:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 2654. [2023-04-01 00:27:29,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2650 states have (on average 1.3743396226415094) internal successors, (3642), 2650 states have internal predecessors, (3642), 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 00:27:29,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3645 transitions. [2023-04-01 00:27:29,965 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3645 transitions. Word has length 51 [2023-04-01 00:27:29,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:29,965 INFO L495 AbstractCegarLoop]: Abstraction has 2654 states and 3645 transitions. [2023-04-01 00:27:29,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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 00:27:29,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3645 transitions. [2023-04-01 00:27:29,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 00:27:29,966 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:29,966 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] [2023-04-01 00:27:29,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 00:27:29,966 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:29,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:29,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1423140825, now seen corresponding path program 1 times [2023-04-01 00:27:29,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:29,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457425894] [2023-04-01 00:27:29,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:29,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:29,995 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 00:27:29,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:29,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457425894] [2023-04-01 00:27:29,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457425894] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:29,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:29,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:29,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617690783] [2023-04-01 00:27:29,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:29,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:29,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:29,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:29,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:29,997 INFO L87 Difference]: Start difference. First operand 2654 states and 3645 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 00:27:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:30,349 INFO L93 Difference]: Finished difference Result 4550 states and 6295 transitions. [2023-04-01 00:27:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:30,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 52 [2023-04-01 00:27:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:30,355 INFO L225 Difference]: With dead ends: 4550 [2023-04-01 00:27:30,355 INFO L226 Difference]: Without dead ends: 2335 [2023-04-01 00:27:30,359 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 00:27:30,359 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 70 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:30,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 227 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2023-04-01 00:27:30,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 2332. [2023-04-01 00:27:30,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2328 states have (on average 1.3711340206185567) internal successors, (3192), 2328 states have internal predecessors, (3192), 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 00:27:30,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 3195 transitions. [2023-04-01 00:27:30,740 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 3195 transitions. Word has length 52 [2023-04-01 00:27:30,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:30,740 INFO L495 AbstractCegarLoop]: Abstraction has 2332 states and 3195 transitions. [2023-04-01 00:27:30,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 00:27:30,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 3195 transitions. [2023-04-01 00:27:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 00:27:30,741 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:30,741 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] [2023-04-01 00:27:30,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 00:27:30,741 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:30,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:30,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2078931878, now seen corresponding path program 1 times [2023-04-01 00:27:30,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:30,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075390919] [2023-04-01 00:27:30,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:30,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:32,789 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 00:27:32,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:32,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075390919] [2023-04-01 00:27:32,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075390919] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:32,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:32,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-04-01 00:27:32,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936378510] [2023-04-01 00:27:32,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:32,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 00:27:32,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:32,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 00:27:32,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-04-01 00:27:32,791 INFO L87 Difference]: Start difference. First operand 2332 states and 3195 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 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 00:27:37,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:37,148 INFO L93 Difference]: Finished difference Result 3249 states and 4446 transitions. [2023-04-01 00:27:37,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 00:27:37,149 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 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 53 [2023-04-01 00:27:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:37,156 INFO L225 Difference]: With dead ends: 3249 [2023-04-01 00:27:37,156 INFO L226 Difference]: Without dead ends: 3185 [2023-04-01 00:27:37,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2023-04-01 00:27:37,158 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 741 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 2203 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:37,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 1517 Invalid, 2244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2203 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 00:27:37,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3185 states. [2023-04-01 00:27:37,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3185 to 2320. [2023-04-01 00:27:37,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2316 states have (on average 1.3726252158894645) internal successors, (3179), 2316 states have internal predecessors, (3179), 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 00:27:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3182 transitions. [2023-04-01 00:27:37,532 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3182 transitions. Word has length 53 [2023-04-01 00:27:37,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:37,533 INFO L495 AbstractCegarLoop]: Abstraction has 2320 states and 3182 transitions. [2023-04-01 00:27:37,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 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 00:27:37,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3182 transitions. [2023-04-01 00:27:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 00:27:37,534 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:37,534 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] [2023-04-01 00:27:37,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 00:27:37,534 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:37,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:37,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1517377294, now seen corresponding path program 1 times [2023-04-01 00:27:37,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:37,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313600353] [2023-04-01 00:27:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:37,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:37,601 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 00:27:37,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:37,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313600353] [2023-04-01 00:27:37,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313600353] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:37,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:37,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:37,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861600177] [2023-04-01 00:27:37,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:37,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:37,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:37,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:37,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:37,603 INFO L87 Difference]: Start difference. First operand 2320 states and 3182 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 00:27:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:38,149 INFO L93 Difference]: Finished difference Result 4751 states and 6564 transitions. [2023-04-01 00:27:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:38,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 58 [2023-04-01 00:27:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:38,175 INFO L225 Difference]: With dead ends: 4751 [2023-04-01 00:27:38,176 INFO L226 Difference]: Without dead ends: 3205 [2023-04-01 00:27:38,178 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 00:27:38,179 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 67 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:38,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 267 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:38,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2023-04-01 00:27:38,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 2983. [2023-04-01 00:27:38,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2979 states have (on average 1.3608593487747567) internal successors, (4054), 2979 states have internal predecessors, (4054), 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 00:27:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 4057 transitions. [2023-04-01 00:27:38,695 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 4057 transitions. Word has length 58 [2023-04-01 00:27:38,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:38,695 INFO L495 AbstractCegarLoop]: Abstraction has 2983 states and 4057 transitions. [2023-04-01 00:27:38,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 00:27:38,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 4057 transitions. [2023-04-01 00:27:38,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 00:27:38,696 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:38,696 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 00:27:38,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 00:27:38,696 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:38,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:38,696 INFO L85 PathProgramCache]: Analyzing trace with hash -240727624, now seen corresponding path program 1 times [2023-04-01 00:27:38,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:38,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976095320] [2023-04-01 00:27:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:38,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:38,766 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 00:27:38,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:38,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976095320] [2023-04-01 00:27:38,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976095320] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:38,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:38,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:38,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402775045] [2023-04-01 00:27:38,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:38,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:38,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:38,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:38,768 INFO L87 Difference]: Start difference. First operand 2983 states and 4057 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 00:27:39,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:39,403 INFO L93 Difference]: Finished difference Result 5950 states and 8128 transitions. [2023-04-01 00:27:39,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:39,404 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 00:27:39,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:39,410 INFO L225 Difference]: With dead ends: 5950 [2023-04-01 00:27:39,410 INFO L226 Difference]: Without dead ends: 3744 [2023-04-01 00:27:39,413 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 00:27:39,413 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 64 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:39,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 249 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3744 states. [2023-04-01 00:27:39,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3744 to 3432. [2023-04-01 00:27:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3432 states, 3428 states have (on average 1.3471411901983663) internal successors, (4618), 3428 states have internal predecessors, (4618), 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 00:27:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 4621 transitions. [2023-04-01 00:27:39,989 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 4621 transitions. Word has length 60 [2023-04-01 00:27:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:39,989 INFO L495 AbstractCegarLoop]: Abstraction has 3432 states and 4621 transitions. [2023-04-01 00:27:39,989 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 00:27:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 4621 transitions. [2023-04-01 00:27:39,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-01 00:27:39,990 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:39,990 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 00:27:39,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 00:27:39,990 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:39,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:39,990 INFO L85 PathProgramCache]: Analyzing trace with hash -998369029, now seen corresponding path program 1 times [2023-04-01 00:27:39,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:39,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12612848] [2023-04-01 00:27:39,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:39,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:40,056 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 00:27:40,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:40,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12612848] [2023-04-01 00:27:40,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12612848] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:40,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:40,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:40,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926919646] [2023-04-01 00:27:40,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:40,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:40,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:40,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:40,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:40,058 INFO L87 Difference]: Start difference. First operand 3432 states and 4621 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 00:27:40,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:40,730 INFO L93 Difference]: Finished difference Result 4773 states and 6432 transitions. [2023-04-01 00:27:40,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:40,730 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 00:27:40,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:40,736 INFO L225 Difference]: With dead ends: 4773 [2023-04-01 00:27:40,736 INFO L226 Difference]: Without dead ends: 3776 [2023-04-01 00:27:40,738 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 00:27:40,738 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 58 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:40,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 255 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:40,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2023-04-01 00:27:41,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 3709. [2023-04-01 00:27:41,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3709 states, 3705 states have (on average 1.3392712550607286) internal successors, (4962), 3705 states have internal predecessors, (4962), 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 00:27:41,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3709 states to 3709 states and 4965 transitions. [2023-04-01 00:27:41,389 INFO L78 Accepts]: Start accepts. Automaton has 3709 states and 4965 transitions. Word has length 63 [2023-04-01 00:27:41,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:41,389 INFO L495 AbstractCegarLoop]: Abstraction has 3709 states and 4965 transitions. [2023-04-01 00:27:41,390 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 00:27:41,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3709 states and 4965 transitions. [2023-04-01 00:27:41,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-01 00:27:41,391 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:41,391 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 00:27:41,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 00:27:41,391 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:41,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:41,391 INFO L85 PathProgramCache]: Analyzing trace with hash 367474843, now seen corresponding path program 1 times [2023-04-01 00:27:41,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:41,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284987057] [2023-04-01 00:27:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:41,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:41,458 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 00:27:41,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:41,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284987057] [2023-04-01 00:27:41,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284987057] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:41,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:41,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:41,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243686207] [2023-04-01 00:27:41,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:41,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:41,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:41,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:41,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:41,459 INFO L87 Difference]: Start difference. First operand 3709 states and 4965 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 00:27:42,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:42,340 INFO L93 Difference]: Finished difference Result 8248 states and 11100 transitions. [2023-04-01 00:27:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:42,341 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 00:27:42,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:42,349 INFO L225 Difference]: With dead ends: 8248 [2023-04-01 00:27:42,349 INFO L226 Difference]: Without dead ends: 4883 [2023-04-01 00:27:42,353 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 00:27:42,354 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 59 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:42,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 230 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:42,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4883 states. [2023-04-01 00:27:43,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4883 to 4495. [2023-04-01 00:27:43,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4495 states, 4491 states have (on average 1.325094633711868) internal successors, (5951), 4491 states have internal predecessors, (5951), 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 00:27:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4495 states to 4495 states and 5954 transitions. [2023-04-01 00:27:43,141 INFO L78 Accepts]: Start accepts. Automaton has 4495 states and 5954 transitions. Word has length 63 [2023-04-01 00:27:43,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:43,141 INFO L495 AbstractCegarLoop]: Abstraction has 4495 states and 5954 transitions. [2023-04-01 00:27:43,141 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 00:27:43,141 INFO L276 IsEmpty]: Start isEmpty. Operand 4495 states and 5954 transitions. [2023-04-01 00:27:43,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 00:27:43,142 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:43,142 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 00:27:43,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 00:27:43,143 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:43,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:43,143 INFO L85 PathProgramCache]: Analyzing trace with hash 114091703, now seen corresponding path program 1 times [2023-04-01 00:27:43,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:43,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457382253] [2023-04-01 00:27:43,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:43,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:43,340 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 00:27:43,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:43,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457382253] [2023-04-01 00:27:43,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457382253] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:43,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:43,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:27:43,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346714947] [2023-04-01 00:27:43,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:43,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:27:43,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:43,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:27:43,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:27:43,342 INFO L87 Difference]: Start difference. First operand 4495 states and 5954 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 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 00:27:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:44,620 INFO L93 Difference]: Finished difference Result 6039 states and 7960 transitions. [2023-04-01 00:27:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 00:27:44,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 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 00:27:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:44,630 INFO L225 Difference]: With dead ends: 6039 [2023-04-01 00:27:44,630 INFO L226 Difference]: Without dead ends: 6037 [2023-04-01 00:27:44,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:27:44,632 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 270 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:44,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 686 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:27:44,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6037 states. [2023-04-01 00:27:45,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6037 to 5255. [2023-04-01 00:27:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5255 states, 5251 states have (on average 1.3224147781374975) internal successors, (6944), 5251 states have internal predecessors, (6944), 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 00:27:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5255 states to 5255 states and 6947 transitions. [2023-04-01 00:27:45,606 INFO L78 Accepts]: Start accepts. Automaton has 5255 states and 6947 transitions. Word has length 68 [2023-04-01 00:27:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:45,606 INFO L495 AbstractCegarLoop]: Abstraction has 5255 states and 6947 transitions. [2023-04-01 00:27:45,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 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 00:27:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 5255 states and 6947 transitions. [2023-04-01 00:27:45,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 00:27:45,608 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:45,608 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-04-01 00:27:45,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 00:27:45,608 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:45,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:45,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2056364545, now seen corresponding path program 1 times [2023-04-01 00:27:45,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:45,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117340603] [2023-04-01 00:27:45,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:45,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 00:27:45,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:45,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117340603] [2023-04-01 00:27:45,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117340603] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:45,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:45,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:27:45,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594496254] [2023-04-01 00:27:45,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:45,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:27:45,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:45,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:27:45,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:27:45,755 INFO L87 Difference]: Start difference. First operand 5255 states and 6947 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 00:27:48,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:48,408 INFO L93 Difference]: Finished difference Result 16474 states and 21691 transitions. [2023-04-01 00:27:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 00:27:48,408 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 78 [2023-04-01 00:27:48,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:48,426 INFO L225 Difference]: With dead ends: 16474 [2023-04-01 00:27:48,426 INFO L226 Difference]: Without dead ends: 11990 [2023-04-01 00:27:48,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-04-01 00:27:48,433 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 848 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:48,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 253 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:27:48,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11990 states. [2023-04-01 00:27:50,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11990 to 8777. [2023-04-01 00:27:50,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8777 states, 8773 states have (on average 1.2979596489228313) internal successors, (11387), 8773 states have internal predecessors, (11387), 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 00:27:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8777 states to 8777 states and 11390 transitions. [2023-04-01 00:27:50,428 INFO L78 Accepts]: Start accepts. Automaton has 8777 states and 11390 transitions. Word has length 78 [2023-04-01 00:27:50,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:50,428 INFO L495 AbstractCegarLoop]: Abstraction has 8777 states and 11390 transitions. [2023-04-01 00:27:50,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 00:27:50,428 INFO L276 IsEmpty]: Start isEmpty. Operand 8777 states and 11390 transitions. [2023-04-01 00:27:50,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 00:27:50,430 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:50,430 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-04-01 00:27:50,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 00:27:50,430 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:50,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:50,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1933852486, now seen corresponding path program 1 times [2023-04-01 00:27:50,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:50,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784716225] [2023-04-01 00:27:50,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:50,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 00:27:50,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:50,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784716225] [2023-04-01 00:27:50,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784716225] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:50,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:50,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-01 00:27:50,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116777002] [2023-04-01 00:27:50,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:50,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 00:27:50,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:50,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 00:27:50,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-04-01 00:27:50,920 INFO L87 Difference]: Start difference. First operand 8777 states and 11390 transitions. Second operand has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 12 states have internal predecessors, (73), 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 00:27:54,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:54,547 INFO L93 Difference]: Finished difference Result 17603 states and 22961 transitions. [2023-04-01 00:27:54,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:27:54,547 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 12 states have internal predecessors, (73), 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 78 [2023-04-01 00:27:54,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:54,560 INFO L225 Difference]: With dead ends: 17603 [2023-04-01 00:27:54,560 INFO L226 Difference]: Without dead ends: 10867 [2023-04-01 00:27:54,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2023-04-01 00:27:54,568 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 776 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:54,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 878 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 00:27:54,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10867 states. [2023-04-01 00:27:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10867 to 8652. [2023-04-01 00:27:56,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8652 states, 8648 states have (on average 1.2983348751156336) internal successors, (11228), 8648 states have internal predecessors, (11228), 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 00:27:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8652 states to 8652 states and 11231 transitions. [2023-04-01 00:27:56,731 INFO L78 Accepts]: Start accepts. Automaton has 8652 states and 11231 transitions. Word has length 78 [2023-04-01 00:27:56,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:56,731 INFO L495 AbstractCegarLoop]: Abstraction has 8652 states and 11231 transitions. [2023-04-01 00:27:56,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 12 states have internal predecessors, (73), 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 00:27:56,731 INFO L276 IsEmpty]: Start isEmpty. Operand 8652 states and 11231 transitions. [2023-04-01 00:27:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 00:27:56,733 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:56,733 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-04-01 00:27:56,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-01 00:27:56,733 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:56,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:56,734 INFO L85 PathProgramCache]: Analyzing trace with hash 856495985, now seen corresponding path program 1 times [2023-04-01 00:27:56,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:56,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609579025] [2023-04-01 00:27:56,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:56,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 00:27:56,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:56,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609579025] [2023-04-01 00:27:56,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609579025] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:56,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:56,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:27:56,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383392704] [2023-04-01 00:27:56,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:56,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:27:56,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:56,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:27:56,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:27:56,902 INFO L87 Difference]: Start difference. First operand 8652 states and 11231 transitions. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 8 states have internal predecessors, (73), 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 00:28:00,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:28:00,114 INFO L93 Difference]: Finished difference Result 13849 states and 17967 transitions. [2023-04-01 00:28:00,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 00:28:00,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 8 states have internal predecessors, (73), 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 78 [2023-04-01 00:28:00,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:28:00,127 INFO L225 Difference]: With dead ends: 13849 [2023-04-01 00:28:00,127 INFO L226 Difference]: Without dead ends: 11589 [2023-04-01 00:28:00,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2023-04-01 00:28:00,132 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 735 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:28:00,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 272 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:28:00,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11589 states. [2023-04-01 00:28:02,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11589 to 10028. [2023-04-01 00:28:02,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10028 states, 10024 states have (on average 1.2959896249002394) internal successors, (12991), 10024 states have internal predecessors, (12991), 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 00:28:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10028 states to 10028 states and 12994 transitions. [2023-04-01 00:28:02,871 INFO L78 Accepts]: Start accepts. Automaton has 10028 states and 12994 transitions. Word has length 78 [2023-04-01 00:28:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:28:02,871 INFO L495 AbstractCegarLoop]: Abstraction has 10028 states and 12994 transitions. [2023-04-01 00:28:02,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 8 states have internal predecessors, (73), 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 00:28:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 10028 states and 12994 transitions. [2023-04-01 00:28:02,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 00:28:02,873 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:28:02,873 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-04-01 00:28:02,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-01 00:28:02,873 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:28:02,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:28:02,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1303008298, now seen corresponding path program 1 times [2023-04-01 00:28:02,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:28:02,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024873398] [2023-04-01 00:28:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:28:02,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:28:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:28:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:28:03,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:28:03,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024873398] [2023-04-01 00:28:03,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024873398] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:28:03,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362891808] [2023-04-01 00:28:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:28:03,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:28:03,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:28:03,378 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 00:28:03,379 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 00:28:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:28:03,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 88 conjunts are in the unsatisfiable core [2023-04-01 00:28:03,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:28:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:28:06,039 INFO L327 TraceCheckSpWp]: Computing backward predicates...