/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_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:41:45,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:41:45,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:41:45,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 00:41:45,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:41:45,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:41:45,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:41:45,511 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 00:41:45,534 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:41:45,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:41:45,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:41:45,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:41:45,536 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:41:45,536 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:41:45,536 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:41:45,536 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:41:45,536 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:41:45,536 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:41:45,537 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:41:45,537 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:41:45,537 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:41:45,537 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:41:45,537 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:41:45,537 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:41:45,537 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:41:45,537 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:41:45,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:41:45,538 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:41:45,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:41:45,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:41:45,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:41:45,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:41:45,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:41:45,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:41:45,539 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:41:45,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:41:45,539 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:41:45,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:41:45,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:41:45,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:41:45,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:41:45,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:41:45,540 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:41:45,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:41:45,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:41:45,540 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:41:45,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:41:45,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:41:45,540 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:41:45,541 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:41:45,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:41:45,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:41:45,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:41:45,769 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:41:45,770 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:41:45,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-01 00:41:46,706 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:41:46,993 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:41:46,994 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-01 00:41:47,008 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e687d62f9/77fb07bcf5a94b2cbc7d027c3bd177ae/FLAG31fc9da45 [2023-04-01 00:41:47,017 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e687d62f9/77fb07bcf5a94b2cbc7d027c3bd177ae [2023-04-01 00:41:47,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:41:47,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:41:47,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:41:47,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:41:47,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:41:47,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:41:47" (1/1) ... [2023-04-01 00:41:47,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fac7ed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:41:47, skipping insertion in model container [2023-04-01 00:41:47,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:41:47" (1/1) ... [2023-04-01 00:41:47,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:41:47,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:41:47,440 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_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[34568,34581] [2023-04-01 00:41:47,586 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:41:47,601 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:41:47,810 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_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[34568,34581] [2023-04-01 00:41:47,894 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:41:47,909 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:41:47,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:41:47 WrapperNode [2023-04-01 00:41:47,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:41:47,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:41:47,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:41:47,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:41:47,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:41:47" (1/1) ... [2023-04-01 00:41:47,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:41:47" (1/1) ... [2023-04-01 00:41:47,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:41:47" (1/1) ... [2023-04-01 00:41:47,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:41:47" (1/1) ... [2023-04-01 00:41:48,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:41:47" (1/1) ... [2023-04-01 00:41:48,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:41:47" (1/1) ... [2023-04-01 00:41:48,046 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:41:47" (1/1) ... [2023-04-01 00:41:48,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:41:47" (1/1) ... [2023-04-01 00:41:48,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:41:48,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:41:48,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:41:48,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:41:48,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:41:47" (1/1) ... [2023-04-01 00:41:48,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:41:48,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:41:48,100 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 00:41:48,129 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 00:41:48,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:41:48,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:41:48,145 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:41:48,145 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 00:41:48,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:41:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:41:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:41:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:41:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:41:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:41:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:41:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:41:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 00:41:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:41:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:41:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:41:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:41:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:41:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 00:41:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:41:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:41:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:41:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:41:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:41:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:41:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:41:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:41:48,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:41:48,361 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:41:48,363 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:41:49,690 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:41:50,157 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:41:50,157 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 00:41:50,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:41:50 BoogieIcfgContainer [2023-04-01 00:41:50,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:41:50,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:41:50,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:41:50,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:41:50,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:41:47" (1/3) ... [2023-04-01 00:41:50,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ae380c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:41:50, skipping insertion in model container [2023-04-01 00:41:50,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:41:47" (2/3) ... [2023-04-01 00:41:50,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ae380c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:41:50, skipping insertion in model container [2023-04-01 00:41:50,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:41:50" (3/3) ... [2023-04-01 00:41:50,167 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-01 00:41:50,180 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:41:50,180 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 00:41:50,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:41:50,237 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;@db473d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:41:50,238 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 00:41:50,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 626 states, 611 states have (on average 1.7315875613747955) internal successors, (1058), 621 states have internal predecessors, (1058), 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 00:41:50,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2023-04-01 00:41:50,262 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:41:50,262 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:50,263 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:41:50,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:41:50,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1750034433, now seen corresponding path program 1 times [2023-04-01 00:41:50,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:41:50,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569519392] [2023-04-01 00:41:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:41:50,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:41:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:41:51,795 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 00:41:51,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:41:51,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569519392] [2023-04-01 00:41:51,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569519392] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:41:51,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:41:51,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 00:41:51,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960511801] [2023-04-01 00:41:51,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:41:51,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 00:41:51,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:41:51,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 00:41:51,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:41:51,840 INFO L87 Difference]: Start difference. First operand has 626 states, 611 states have (on average 1.7315875613747955) internal successors, (1058), 621 states have internal predecessors, (1058), 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 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 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 00:41:52,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:41:52,159 INFO L93 Difference]: Finished difference Result 1839 states and 3127 transitions. [2023-04-01 00:41:52,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:41:52,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 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 263 [2023-04-01 00:41:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:41:52,178 INFO L225 Difference]: With dead ends: 1839 [2023-04-01 00:41:52,178 INFO L226 Difference]: Without dead ends: 1200 [2023-04-01 00:41:52,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:41:52,190 INFO L413 NwaCegarLoop]: 1509 mSDtfsCounter, 2471 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2471 SdHoareTripleChecker+Valid, 2477 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:41:52,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2471 Valid, 2477 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:41:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2023-04-01 00:41:52,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1198. [2023-04-01 00:41:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1194 states have (on average 1.431323283082077) internal successors, (1709), 1194 states have internal predecessors, (1709), 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 00:41:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1712 transitions. [2023-04-01 00:41:52,291 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1712 transitions. Word has length 263 [2023-04-01 00:41:52,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:41:52,293 INFO L495 AbstractCegarLoop]: Abstraction has 1198 states and 1712 transitions. [2023-04-01 00:41:52,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 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 00:41:52,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1712 transitions. [2023-04-01 00:41:52,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-04-01 00:41:52,301 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:41:52,301 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:52,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:41:52,302 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:41:52,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:41:52,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1399617002, now seen corresponding path program 1 times [2023-04-01 00:41:52,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:41:52,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435771770] [2023-04-01 00:41:52,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:41:52,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:41:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:41:52,535 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 00:41:52,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:41:52,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435771770] [2023-04-01 00:41:52,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435771770] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:41:52,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:41:52,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:41:52,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071532116] [2023-04-01 00:41:52,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:41:52,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:41:52,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:41:52,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:41:52,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:41:52,540 INFO L87 Difference]: Start difference. First operand 1198 states and 1712 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 00:41:52,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:41:52,813 INFO L93 Difference]: Finished difference Result 3558 states and 5086 transitions. [2023-04-01 00:41:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:41:52,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 265 [2023-04-01 00:41:52,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:41:52,825 INFO L225 Difference]: With dead ends: 3558 [2023-04-01 00:41:52,830 INFO L226 Difference]: Without dead ends: 2381 [2023-04-01 00:41:52,836 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 00:41:52,838 INFO L413 NwaCegarLoop]: 1656 mSDtfsCounter, 866 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 2483 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:41:52,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 2483 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:41:52,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2023-04-01 00:41:52,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1201. [2023-04-01 00:41:52,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1197 states have (on average 1.4302422723475354) internal successors, (1712), 1197 states have internal predecessors, (1712), 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 00:41:52,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1715 transitions. [2023-04-01 00:41:52,931 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1715 transitions. Word has length 265 [2023-04-01 00:41:52,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:41:52,932 INFO L495 AbstractCegarLoop]: Abstraction has 1201 states and 1715 transitions. [2023-04-01 00:41:52,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 00:41:52,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1715 transitions. [2023-04-01 00:41:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-04-01 00:41:52,935 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:41:52,935 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:52,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:41:52,936 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:41:52,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:41:52,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1465007006, now seen corresponding path program 1 times [2023-04-01 00:41:52,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:41:52,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367706559] [2023-04-01 00:41:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:41:52,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:41:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:41:53,159 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 00:41:53,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:41:53,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367706559] [2023-04-01 00:41:53,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367706559] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:41:53,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:41:53,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:41:53,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126968796] [2023-04-01 00:41:53,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:41:53,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:41:53,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:41:53,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:41:53,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:41:53,162 INFO L87 Difference]: Start difference. First operand 1201 states and 1715 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 00:41:53,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:41:53,467 INFO L93 Difference]: Finished difference Result 3420 states and 4865 transitions. [2023-04-01 00:41:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:41:53,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 265 [2023-04-01 00:41:53,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:41:53,477 INFO L225 Difference]: With dead ends: 3420 [2023-04-01 00:41:53,477 INFO L226 Difference]: Without dead ends: 2347 [2023-04-01 00:41:53,481 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 00:41:53,484 INFO L413 NwaCegarLoop]: 1613 mSDtfsCounter, 749 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 2404 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:41:53,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 2404 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:41:53,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2023-04-01 00:41:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2345. [2023-04-01 00:41:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 2341 states have (on average 1.4237505339598462) internal successors, (3333), 2341 states have internal predecessors, (3333), 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 00:41:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 3336 transitions. [2023-04-01 00:41:53,652 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 3336 transitions. Word has length 265 [2023-04-01 00:41:53,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:41:53,653 INFO L495 AbstractCegarLoop]: Abstraction has 2345 states and 3336 transitions. [2023-04-01 00:41:53,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 00:41:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 3336 transitions. [2023-04-01 00:41:53,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-04-01 00:41:53,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:41:53,658 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:53,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:41:53,658 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:41:53,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:41:53,659 INFO L85 PathProgramCache]: Analyzing trace with hash -466987011, now seen corresponding path program 1 times [2023-04-01 00:41:53,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:41:53,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389542447] [2023-04-01 00:41:53,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:41:53,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:41:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:41:53,802 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 00:41:53,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:41:53,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389542447] [2023-04-01 00:41:53,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389542447] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:41:53,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:41:53,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:41:53,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676382162] [2023-04-01 00:41:53,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:41:53,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:41:53,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:41:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:41:53,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:41:53,804 INFO L87 Difference]: Start difference. First operand 2345 states and 3336 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 00:41:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:41:54,139 INFO L93 Difference]: Finished difference Result 4667 states and 6732 transitions. [2023-04-01 00:41:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:41:54,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 265 [2023-04-01 00:41:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:41:54,149 INFO L225 Difference]: With dead ends: 4667 [2023-04-01 00:41:54,149 INFO L226 Difference]: Without dead ends: 3017 [2023-04-01 00:41:54,153 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 00:41:54,153 INFO L413 NwaCegarLoop]: 1086 mSDtfsCounter, 434 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1722 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:41:54,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 1722 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:41:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2023-04-01 00:41:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2713. [2023-04-01 00:41:54,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2709 states have (on average 1.4392764857881137) internal successors, (3899), 2709 states have internal predecessors, (3899), 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 00:41:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 3902 transitions. [2023-04-01 00:41:54,379 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 3902 transitions. Word has length 265 [2023-04-01 00:41:54,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:41:54,379 INFO L495 AbstractCegarLoop]: Abstraction has 2713 states and 3902 transitions. [2023-04-01 00:41:54,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 00:41:54,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 3902 transitions. [2023-04-01 00:41:54,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-04-01 00:41:54,384 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:41:54,385 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:54,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:41:54,385 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:41:54,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:41:54,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1343324982, now seen corresponding path program 1 times [2023-04-01 00:41:54,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:41:54,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610351591] [2023-04-01 00:41:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:41:54,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:41:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:41:55,078 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 00:41:55,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:41:55,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610351591] [2023-04-01 00:41:55,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610351591] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:41:55,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:41:55,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:41:55,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391917806] [2023-04-01 00:41:55,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:41:55,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:41:55,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:41:55,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:41:55,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:41:55,084 INFO L87 Difference]: Start difference. First operand 2713 states and 3902 transitions. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 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 00:41:55,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:41:55,659 INFO L93 Difference]: Finished difference Result 7907 states and 11361 transitions. [2023-04-01 00:41:55,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 00:41:55,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 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 266 [2023-04-01 00:41:55,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:41:55,678 INFO L225 Difference]: With dead ends: 7907 [2023-04-01 00:41:55,679 INFO L226 Difference]: Without dead ends: 5213 [2023-04-01 00:41:55,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:41:55,689 INFO L413 NwaCegarLoop]: 1389 mSDtfsCounter, 1688 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1688 SdHoareTripleChecker+Valid, 2970 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:41:55,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1688 Valid, 2970 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:41:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5213 states. [2023-04-01 00:41:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5213 to 5211. [2023-04-01 00:41:56,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5211 states, 5207 states have (on average 1.429613981179182) internal successors, (7444), 5207 states have internal predecessors, (7444), 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 00:41:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5211 states to 5211 states and 7447 transitions. [2023-04-01 00:41:56,153 INFO L78 Accepts]: Start accepts. Automaton has 5211 states and 7447 transitions. Word has length 266 [2023-04-01 00:41:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:41:56,154 INFO L495 AbstractCegarLoop]: Abstraction has 5211 states and 7447 transitions. [2023-04-01 00:41:56,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 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 00:41:56,155 INFO L276 IsEmpty]: Start isEmpty. Operand 5211 states and 7447 transitions. [2023-04-01 00:41:56,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-04-01 00:41:56,162 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:41:56,162 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:56,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:41:56,163 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:41:56,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:41:56,163 INFO L85 PathProgramCache]: Analyzing trace with hash 443312171, now seen corresponding path program 1 times [2023-04-01 00:41:56,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:41:56,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811065577] [2023-04-01 00:41:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:41:56,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:41:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:41:56,785 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 00:41:56,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:41:56,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811065577] [2023-04-01 00:41:56,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811065577] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:41:56,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:41:56,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 00:41:56,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507571209] [2023-04-01 00:41:56,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:41:56,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 00:41:56,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:41:56,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 00:41:56,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:41:56,787 INFO L87 Difference]: Start difference. First operand 5211 states and 7447 transitions. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 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 00:41:57,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:41:57,734 INFO L93 Difference]: Finished difference Result 15122 states and 21567 transitions. [2023-04-01 00:41:57,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 00:41:57,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 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 267 [2023-04-01 00:41:57,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:41:57,764 INFO L225 Difference]: With dead ends: 15122 [2023-04-01 00:41:57,764 INFO L226 Difference]: Without dead ends: 10053 [2023-04-01 00:41:57,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:41:57,774 INFO L413 NwaCegarLoop]: 1381 mSDtfsCounter, 1845 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1845 SdHoareTripleChecker+Valid, 2177 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:41:57,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1845 Valid, 2177 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:41:57,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10053 states. [2023-04-01 00:41:58,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10053 to 10051. [2023-04-01 00:41:58,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10051 states, 10047 states have (on average 1.4198268139743206) internal successors, (14265), 10047 states have internal predecessors, (14265), 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 00:41:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10051 states to 10051 states and 14268 transitions. [2023-04-01 00:41:58,568 INFO L78 Accepts]: Start accepts. Automaton has 10051 states and 14268 transitions. Word has length 267 [2023-04-01 00:41:58,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:41:58,568 INFO L495 AbstractCegarLoop]: Abstraction has 10051 states and 14268 transitions. [2023-04-01 00:41:58,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 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 00:41:58,569 INFO L276 IsEmpty]: Start isEmpty. Operand 10051 states and 14268 transitions. [2023-04-01 00:41:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-04-01 00:41:58,584 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:41:58,585 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:58,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:41:58,585 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:41:58,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:41:58,585 INFO L85 PathProgramCache]: Analyzing trace with hash -602183287, now seen corresponding path program 1 times [2023-04-01 00:41:58,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:41:58,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490084536] [2023-04-01 00:41:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:41:58,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:41:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:41:59,242 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 00:41:59,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:41:59,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490084536] [2023-04-01 00:41:59,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490084536] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:41:59,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:41:59,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 00:41:59,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810738026] [2023-04-01 00:41:59,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:41:59,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 00:41:59,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:41:59,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 00:41:59,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:41:59,250 INFO L87 Difference]: Start difference. First operand 10051 states and 14268 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 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 00:42:00,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:42:00,892 INFO L93 Difference]: Finished difference Result 29471 states and 41747 transitions. [2023-04-01 00:42:00,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 00:42:00,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 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 269 [2023-04-01 00:42:00,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:42:00,940 INFO L225 Difference]: With dead ends: 29471 [2023-04-01 00:42:00,940 INFO L226 Difference]: Without dead ends: 19566 [2023-04-01 00:42:00,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:42:00,957 INFO L413 NwaCegarLoop]: 1200 mSDtfsCounter, 1981 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1981 SdHoareTripleChecker+Valid, 1977 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:42:00,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1981 Valid, 1977 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:42:00,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19566 states. [2023-04-01 00:42:02,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19566 to 19564. [2023-04-01 00:42:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19564 states, 19560 states have (on average 1.4080265848670757) internal successors, (27541), 19560 states have internal predecessors, (27541), 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 00:42:02,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19564 states to 19564 states and 27544 transitions. [2023-04-01 00:42:02,566 INFO L78 Accepts]: Start accepts. Automaton has 19564 states and 27544 transitions. Word has length 269 [2023-04-01 00:42:02,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:42:02,566 INFO L495 AbstractCegarLoop]: Abstraction has 19564 states and 27544 transitions. [2023-04-01 00:42:02,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 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 00:42:02,567 INFO L276 IsEmpty]: Start isEmpty. Operand 19564 states and 27544 transitions. [2023-04-01 00:42:02,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-04-01 00:42:02,594 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:42:02,594 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:02,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:42:02,595 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:42:02,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:42:02,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1872166431, now seen corresponding path program 1 times [2023-04-01 00:42:02,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:42:02,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822083850] [2023-04-01 00:42:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:42:02,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:42:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:42:02,752 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 00:42:02,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:42:02,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822083850] [2023-04-01 00:42:02,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822083850] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:42:02,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:42:02,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:42:02,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793935276] [2023-04-01 00:42:02,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:42:02,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:42:02,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:42:02,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:42:02,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:42:02,754 INFO L87 Difference]: Start difference. First operand 19564 states and 27544 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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 00:42:05,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:42:05,838 INFO L93 Difference]: Finished difference Result 56211 states and 78793 transitions. [2023-04-01 00:42:05,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:42:05,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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 271 [2023-04-01 00:42:05,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:42:05,929 INFO L225 Difference]: With dead ends: 56211 [2023-04-01 00:42:05,929 INFO L226 Difference]: Without dead ends: 38213 [2023-04-01 00:42:05,962 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 00:42:05,963 INFO L413 NwaCegarLoop]: 1586 mSDtfsCounter, 729 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 2374 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:42:05,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 2374 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:42:05,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38213 states. [2023-04-01 00:42:09,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38213 to 38211. [2023-04-01 00:42:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38211 states, 38207 states have (on average 1.3990106524982333) internal successors, (53452), 38207 states have internal predecessors, (53452), 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 00:42:09,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38211 states to 38211 states and 53455 transitions. [2023-04-01 00:42:09,431 INFO L78 Accepts]: Start accepts. Automaton has 38211 states and 53455 transitions. Word has length 271 [2023-04-01 00:42:09,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:42:09,431 INFO L495 AbstractCegarLoop]: Abstraction has 38211 states and 53455 transitions. [2023-04-01 00:42:09,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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 00:42:09,431 INFO L276 IsEmpty]: Start isEmpty. Operand 38211 states and 53455 transitions. [2023-04-01 00:42:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-04-01 00:42:09,478 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:42:09,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:09,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:42:09,479 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:42:09,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:42:09,479 INFO L85 PathProgramCache]: Analyzing trace with hash 893237765, now seen corresponding path program 1 times [2023-04-01 00:42:09,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:42:09,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263991849] [2023-04-01 00:42:09,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:42:09,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:42:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:42:09,583 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 00:42:09,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:42:09,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263991849] [2023-04-01 00:42:09,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263991849] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:42:09,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:42:09,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:42:09,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304971219] [2023-04-01 00:42:09,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:42:09,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:42:09,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:42:09,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:42:09,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:42:09,586 INFO L87 Difference]: Start difference. First operand 38211 states and 53455 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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 00:42:15,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:42:15,687 INFO L93 Difference]: Finished difference Result 112690 states and 157475 transitions. [2023-04-01 00:42:15,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:42:15,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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 271 [2023-04-01 00:42:15,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:42:15,838 INFO L225 Difference]: With dead ends: 112690 [2023-04-01 00:42:15,838 INFO L226 Difference]: Without dead ends: 76169 [2023-04-01 00:42:15,894 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 00:42:15,896 INFO L413 NwaCegarLoop]: 1629 mSDtfsCounter, 839 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 2453 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:42:15,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 2453 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:42:15,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76169 states. [2023-04-01 00:42:20,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76169 to 38244. [2023-04-01 00:42:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38244 states, 38240 states have (on average 1.3986663179916319) internal successors, (53485), 38240 states have internal predecessors, (53485), 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 00:42:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38244 states to 38244 states and 53488 transitions. [2023-04-01 00:42:20,138 INFO L78 Accepts]: Start accepts. Automaton has 38244 states and 53488 transitions. Word has length 271 [2023-04-01 00:42:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:42:20,138 INFO L495 AbstractCegarLoop]: Abstraction has 38244 states and 53488 transitions. [2023-04-01 00:42:20,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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 00:42:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 38244 states and 53488 transitions. [2023-04-01 00:42:20,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-04-01 00:42:20,181 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:42:20,181 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:20,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 00:42:20,182 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:42:20,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:42:20,182 INFO L85 PathProgramCache]: Analyzing trace with hash 966444113, now seen corresponding path program 1 times [2023-04-01 00:42:20,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:42:20,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655054702] [2023-04-01 00:42:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:42:20,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:42:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:42:20,846 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 00:42:20,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:42:20,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655054702] [2023-04-01 00:42:20,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655054702] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:42:20,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:42:20,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:42:20,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550461279] [2023-04-01 00:42:20,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:42:20,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:42:20,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:42:20,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:42:20,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:42:20,848 INFO L87 Difference]: Start difference. First operand 38244 states and 53488 transitions. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 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 00:42:27,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:42:27,654 INFO L93 Difference]: Finished difference Result 111223 states and 155095 transitions. [2023-04-01 00:42:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 00:42:27,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 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 272 [2023-04-01 00:42:27,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:42:27,781 INFO L225 Difference]: With dead ends: 111223 [2023-04-01 00:42:27,781 INFO L226 Difference]: Without dead ends: 73183 [2023-04-01 00:42:27,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:42:27,818 INFO L413 NwaCegarLoop]: 1206 mSDtfsCounter, 2838 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2838 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:42:27,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2838 Valid, 1991 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:42:27,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73183 states. [2023-04-01 00:42:34,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73183 to 73181. [2023-04-01 00:42:34,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73181 states, 73177 states have (on average 1.386883856949588) internal successors, (101488), 73177 states have internal predecessors, (101488), 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 00:42:35,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73181 states to 73181 states and 101491 transitions. [2023-04-01 00:42:35,109 INFO L78 Accepts]: Start accepts. Automaton has 73181 states and 101491 transitions. Word has length 272 [2023-04-01 00:42:35,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:42:35,109 INFO L495 AbstractCegarLoop]: Abstraction has 73181 states and 101491 transitions. [2023-04-01 00:42:35,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 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 00:42:35,110 INFO L276 IsEmpty]: Start isEmpty. Operand 73181 states and 101491 transitions. [2023-04-01 00:42:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-04-01 00:42:35,181 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:42:35,182 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:35,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 00:42:35,182 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:42:35,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:42:35,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1339323683, now seen corresponding path program 1 times [2023-04-01 00:42:35,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:42:35,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89590535] [2023-04-01 00:42:35,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:42:35,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:42:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:42:35,648 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 00:42:35,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:42:35,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89590535] [2023-04-01 00:42:35,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89590535] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:42:35,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:42:35,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 00:42:35,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246506410] [2023-04-01 00:42:35,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:42:35,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 00:42:35,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:42:35,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 00:42:35,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:42:35,649 INFO L87 Difference]: Start difference. First operand 73181 states and 101491 transitions. Second operand has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 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)