/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:27:37,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:27:37,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:27:37,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 00:27:37,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:27:37,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:27:37,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:27:37,972 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 00:27:37,993 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:27:37,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:27:37,994 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:27:37,994 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:27:37,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:27:37,995 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:27:37,995 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:27:37,995 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:27:37,995 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:27:37,995 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:27:37,995 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:27:37,995 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:27:37,996 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:27:37,996 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:27:37,996 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:27:37,996 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:27:37,996 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:27:37,996 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:27:37,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:27:37,999 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:27:37,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:27:37,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:27:38,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:27:38,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:27:38,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:27:38,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:27:38,000 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:27:38,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:27:38,001 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:27:38,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:27:38,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:27:38,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:27:38,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:27:38,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:27:38,002 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:27:38,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:27:38,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:27:38,003 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:27:38,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:27:38,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:27:38,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:27:38,004 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:27:38,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:27:38,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:27:38,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:27:38,274 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:27:38,274 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:27:38,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 00:27:39,435 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:27:39,622 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:27:39,622 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 00:27:39,631 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7087a383b/48db5ff7591840aaa13a548ee818bf78/FLAGcdd8532d9 [2023-04-01 00:27:39,651 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7087a383b/48db5ff7591840aaa13a548ee818bf78 [2023-04-01 00:27:39,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:27:39,654 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:27:39,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:27:39,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:27:39,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:27:39,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:27:39" (1/1) ... [2023-04-01 00:27:39,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@226cc697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:39, skipping insertion in model container [2023-04-01 00:27:39,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:27:39" (1/1) ... [2023-04-01 00:27:39,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:27:39,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:27:39,892 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7165,7178] [2023-04-01 00:27:39,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:27:39,933 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:27:39,998 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7165,7178] [2023-04-01 00:27:40,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:27:40,046 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:27:40,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:40 WrapperNode [2023-04-01 00:27:40,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:27:40,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:27:40,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:27:40,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:27:40,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:40" (1/1) ... [2023-04-01 00:27:40,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:40" (1/1) ... [2023-04-01 00:27:40,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:40" (1/1) ... [2023-04-01 00:27:40,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:40" (1/1) ... [2023-04-01 00:27:40,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:40" (1/1) ... [2023-04-01 00:27:40,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:40" (1/1) ... [2023-04-01 00:27:40,126 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:40" (1/1) ... [2023-04-01 00:27:40,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:40" (1/1) ... [2023-04-01 00:27:40,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:27:40,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:27:40,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:27:40,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:27:40,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:40" (1/1) ... [2023-04-01 00:27:40,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:27:40,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:27:40,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 00:27:40,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 00:27:40,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:27:40,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:27:40,245 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:27:40,245 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 00:27:40,245 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:27:40,245 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:27:40,245 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:27:40,245 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:27:40,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:27:40,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:27:40,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:27:40,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 00:27:40,246 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:27:40,246 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 00:27:40,246 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:27:40,246 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:27:40,246 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:27:40,246 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:27:40,248 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:27:40,248 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:27:40,248 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:27:40,248 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:27:40,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:27:40,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:27:40,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:27:40,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:27:40,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:27:40,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:27:40,429 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:27:40,431 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:27:40,990 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:27:41,150 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:27:41,150 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 00:27:41,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:27:41 BoogieIcfgContainer [2023-04-01 00:27:41,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:27:41,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:27:41,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:27:41,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:27:41,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:27:39" (1/3) ... [2023-04-01 00:27:41,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d1b8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:27:41, skipping insertion in model container [2023-04-01 00:27:41,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:40" (2/3) ... [2023-04-01 00:27:41,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d1b8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:27:41, skipping insertion in model container [2023-04-01 00:27:41,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:27:41" (3/3) ... [2023-04-01 00:27:41,163 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 00:27:41,178 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:27:41,178 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 00:27:41,228 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:27:41,234 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;@1997b8c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:27:41,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 00:27:41,238 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 102 states have (on average 1.6862745098039216) internal successors, (172), 103 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 00:27:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 00:27:41,246 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:41,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:41,248 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:41,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:41,254 INFO L85 PathProgramCache]: Analyzing trace with hash -376337197, now seen corresponding path program 1 times [2023-04-01 00:27:41,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:41,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834831564] [2023-04-01 00:27:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:41,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:41,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:41,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834831564] [2023-04-01 00:27:41,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834831564] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:41,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:41,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:27:41,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10695338] [2023-04-01 00:27:41,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:41,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:27:41,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:41,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:27:41,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:41,874 INFO L87 Difference]: Start difference. First operand has 108 states, 102 states have (on average 1.6862745098039216) internal successors, (172), 103 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:42,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:42,145 INFO L93 Difference]: Finished difference Result 291 states and 457 transitions. [2023-04-01 00:27:42,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:27:42,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-01 00:27:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:42,158 INFO L225 Difference]: With dead ends: 291 [2023-04-01 00:27:42,159 INFO L226 Difference]: Without dead ends: 211 [2023-04-01 00:27:42,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:42,166 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 432 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:42,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 488 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:27:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-04-01 00:27:42,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2023-04-01 00:27:42,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 203 states have (on average 1.3694581280788178) internal successors, (278), 203 states have internal predecessors, (278), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:42,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 281 transitions. [2023-04-01 00:27:42,241 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 281 transitions. Word has length 45 [2023-04-01 00:27:42,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:42,242 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 281 transitions. [2023-04-01 00:27:42,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:42,242 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 281 transitions. [2023-04-01 00:27:42,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 00:27:42,245 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:42,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:42,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:27:42,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:42,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:42,247 INFO L85 PathProgramCache]: Analyzing trace with hash 33304723, now seen corresponding path program 1 times [2023-04-01 00:27:42,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:42,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744408689] [2023-04-01 00:27:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:42,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:42,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:42,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744408689] [2023-04-01 00:27:42,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744408689] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:42,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:42,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:27:42,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174742527] [2023-04-01 00:27:42,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:42,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:27:42,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:42,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:27:42,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:42,472 INFO L87 Difference]: Start difference. First operand 207 states and 281 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:42,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:42,684 INFO L93 Difference]: Finished difference Result 460 states and 642 transitions. [2023-04-01 00:27:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:27:42,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-04-01 00:27:42,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:42,693 INFO L225 Difference]: With dead ends: 460 [2023-04-01 00:27:42,697 INFO L226 Difference]: Without dead ends: 295 [2023-04-01 00:27:42,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:27:42,703 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 334 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:42,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 152 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:27:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-04-01 00:27:42,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 293. [2023-04-01 00:27:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 289 states have (on average 1.3875432525951557) internal successors, (401), 289 states have internal predecessors, (401), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 404 transitions. [2023-04-01 00:27:42,765 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 404 transitions. Word has length 46 [2023-04-01 00:27:42,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:42,766 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 404 transitions. [2023-04-01 00:27:42,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 404 transitions. [2023-04-01 00:27:42,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 00:27:42,774 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:42,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:42,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:27:42,775 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:42,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:42,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1209147874, now seen corresponding path program 1 times [2023-04-01 00:27:42,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:42,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881902819] [2023-04-01 00:27:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:42,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:42,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:42,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881902819] [2023-04-01 00:27:42,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881902819] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:42,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:42,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:27:42,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042297424] [2023-04-01 00:27:42,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:42,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:27:42,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:42,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:27:42,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:42,901 INFO L87 Difference]: Start difference. First operand 293 states and 404 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:43,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:43,108 INFO L93 Difference]: Finished difference Result 698 states and 990 transitions. [2023-04-01 00:27:43,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:27:43,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-04-01 00:27:43,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:43,111 INFO L225 Difference]: With dead ends: 698 [2023-04-01 00:27:43,111 INFO L226 Difference]: Without dead ends: 467 [2023-04-01 00:27:43,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:27:43,113 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 317 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:43,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 160 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:27:43,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2023-04-01 00:27:43,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 465. [2023-04-01 00:27:43,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 461 states have (on average 1.405639913232104) internal successors, (648), 461 states have internal predecessors, (648), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:43,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 651 transitions. [2023-04-01 00:27:43,187 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 651 transitions. Word has length 46 [2023-04-01 00:27:43,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:43,187 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 651 transitions. [2023-04-01 00:27:43,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:43,188 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 651 transitions. [2023-04-01 00:27:43,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 00:27:43,189 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:43,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:43,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:27:43,189 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:43,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:43,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1146621832, now seen corresponding path program 1 times [2023-04-01 00:27:43,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:43,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598012311] [2023-04-01 00:27:43,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:43,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:43,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:43,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598012311] [2023-04-01 00:27:43,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598012311] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:43,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:43,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 00:27:43,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846144602] [2023-04-01 00:27:43,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:43,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 00:27:43,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:43,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 00:27:43,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-01 00:27:43,701 INFO L87 Difference]: Start difference. First operand 465 states and 651 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:44,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:44,348 INFO L93 Difference]: Finished difference Result 1272 states and 1807 transitions. [2023-04-01 00:27:44,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 00:27:44,348 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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 47 [2023-04-01 00:27:44,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:44,355 INFO L225 Difference]: With dead ends: 1272 [2023-04-01 00:27:44,355 INFO L226 Difference]: Without dead ends: 1073 [2023-04-01 00:27:44,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-04-01 00:27:44,364 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 1025 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:44,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1025 Valid, 567 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:27:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2023-04-01 00:27:44,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 718. [2023-04-01 00:27:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 714 states have (on average 1.3977591036414565) internal successors, (998), 714 states have internal predecessors, (998), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1001 transitions. [2023-04-01 00:27:44,538 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1001 transitions. Word has length 47 [2023-04-01 00:27:44,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:44,539 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 1001 transitions. [2023-04-01 00:27:44,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:44,540 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1001 transitions. [2023-04-01 00:27:44,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 00:27:44,540 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:44,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:44,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:27:44,541 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:44,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:44,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1731601432, now seen corresponding path program 1 times [2023-04-01 00:27:44,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:44,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127977723] [2023-04-01 00:27:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:44,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:45,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:45,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127977723] [2023-04-01 00:27:45,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127977723] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:45,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:45,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 00:27:45,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611597001] [2023-04-01 00:27:45,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:45,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 00:27:45,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:45,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 00:27:45,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:27:45,006 INFO L87 Difference]: Start difference. First operand 718 states and 1001 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:45,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:45,918 INFO L93 Difference]: Finished difference Result 1289 states and 1791 transitions. [2023-04-01 00:27:45,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:27:45,918 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 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 47 [2023-04-01 00:27:45,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:45,923 INFO L225 Difference]: With dead ends: 1289 [2023-04-01 00:27:45,923 INFO L226 Difference]: Without dead ends: 1220 [2023-04-01 00:27:45,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2023-04-01 00:27:45,924 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 951 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:45,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 797 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 00:27:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2023-04-01 00:27:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 980. [2023-04-01 00:27:46,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 976 states have (on average 1.3883196721311475) internal successors, (1355), 976 states have internal predecessors, (1355), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:46,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1358 transitions. [2023-04-01 00:27:46,090 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1358 transitions. Word has length 47 [2023-04-01 00:27:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:46,092 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 1358 transitions. [2023-04-01 00:27:46,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1358 transitions. [2023-04-01 00:27:46,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 00:27:46,093 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:46,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:46,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:27:46,094 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:46,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:46,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1249839561, now seen corresponding path program 1 times [2023-04-01 00:27:46,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:46,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379515755] [2023-04-01 00:27:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:46,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:46,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:46,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379515755] [2023-04-01 00:27:46,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379515755] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:46,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:46,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:27:46,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622431628] [2023-04-01 00:27:46,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:46,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:27:46,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:46,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:27:46,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:46,188 INFO L87 Difference]: Start difference. First operand 980 states and 1358 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:46,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:46,423 INFO L93 Difference]: Finished difference Result 1408 states and 1968 transitions. [2023-04-01 00:27:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:27:46,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-04-01 00:27:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:46,428 INFO L225 Difference]: With dead ends: 1408 [2023-04-01 00:27:46,428 INFO L226 Difference]: Without dead ends: 980 [2023-04-01 00:27:46,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:27:46,430 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 281 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:46,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 124 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:27:46,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2023-04-01 00:27:46,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 980. [2023-04-01 00:27:46,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 976 states have (on average 1.3872950819672132) internal successors, (1354), 976 states have internal predecessors, (1354), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1357 transitions. [2023-04-01 00:27:46,600 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1357 transitions. Word has length 47 [2023-04-01 00:27:46,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:46,601 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 1357 transitions. [2023-04-01 00:27:46,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:46,601 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1357 transitions. [2023-04-01 00:27:46,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 00:27:46,602 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:46,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:46,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:27:46,602 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:46,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:46,602 INFO L85 PathProgramCache]: Analyzing trace with hash 333282627, now seen corresponding path program 1 times [2023-04-01 00:27:46,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:46,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972172881] [2023-04-01 00:27:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:46,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:46,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:46,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972172881] [2023-04-01 00:27:46,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972172881] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:46,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:46,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 00:27:46,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457156470] [2023-04-01 00:27:46,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:46,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 00:27:46,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:46,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 00:27:46,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-04-01 00:27:46,963 INFO L87 Difference]: Start difference. First operand 980 states and 1357 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:48,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:48,008 INFO L93 Difference]: Finished difference Result 2918 states and 4199 transitions. [2023-04-01 00:27:48,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 00:27:48,008 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-04-01 00:27:48,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:48,018 INFO L225 Difference]: With dead ends: 2918 [2023-04-01 00:27:48,019 INFO L226 Difference]: Without dead ends: 2572 [2023-04-01 00:27:48,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2023-04-01 00:27:48,021 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 864 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:48,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 818 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:27:48,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2023-04-01 00:27:48,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 1820. [2023-04-01 00:27:48,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1816 states have (on average 1.4047356828193833) internal successors, (2551), 1816 states have internal predecessors, (2551), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2554 transitions. [2023-04-01 00:27:48,373 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2554 transitions. Word has length 48 [2023-04-01 00:27:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:48,373 INFO L495 AbstractCegarLoop]: Abstraction has 1820 states and 2554 transitions. [2023-04-01 00:27:48,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2554 transitions. [2023-04-01 00:27:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 00:27:48,374 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:48,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:48,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:27:48,374 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:48,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:48,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1543144797, now seen corresponding path program 1 times [2023-04-01 00:27:48,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:48,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883233273] [2023-04-01 00:27:48,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:48,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:48,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:48,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883233273] [2023-04-01 00:27:48,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883233273] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:48,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:48,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 00:27:48,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601541981] [2023-04-01 00:27:48,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:48,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 00:27:48,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:48,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 00:27:48,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-04-01 00:27:48,848 INFO L87 Difference]: Start difference. First operand 1820 states and 2554 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:49,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:49,900 INFO L93 Difference]: Finished difference Result 4067 states and 5739 transitions. [2023-04-01 00:27:49,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 00:27:49,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-04-01 00:27:49,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:49,915 INFO L225 Difference]: With dead ends: 4067 [2023-04-01 00:27:49,915 INFO L226 Difference]: Without dead ends: 4003 [2023-04-01 00:27:49,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2023-04-01 00:27:49,918 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 471 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:49,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 824 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:27:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2023-04-01 00:27:50,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 1832. [2023-04-01 00:27:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1828 states have (on average 1.4020787746170678) internal successors, (2563), 1828 states have internal predecessors, (2563), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 2566 transitions. [2023-04-01 00:27:50,252 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 2566 transitions. Word has length 49 [2023-04-01 00:27:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:50,253 INFO L495 AbstractCegarLoop]: Abstraction has 1832 states and 2566 transitions. [2023-04-01 00:27:50,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:50,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 2566 transitions. [2023-04-01 00:27:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 00:27:50,254 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:50,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:50,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:27:50,254 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:50,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:50,255 INFO L85 PathProgramCache]: Analyzing trace with hash 661081860, now seen corresponding path program 1 times [2023-04-01 00:27:50,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:50,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48933869] [2023-04-01 00:27:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:50,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:50,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:50,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48933869] [2023-04-01 00:27:50,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48933869] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:50,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:50,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:50,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320227829] [2023-04-01 00:27:50,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:50,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:50,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:50,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:50,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:50,311 INFO L87 Difference]: Start difference. First operand 1832 states and 2566 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:50,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:50,696 INFO L93 Difference]: Finished difference Result 3213 states and 4550 transitions. [2023-04-01 00:27:50,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:50,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2023-04-01 00:27:50,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:50,706 INFO L225 Difference]: With dead ends: 3213 [2023-04-01 00:27:50,706 INFO L226 Difference]: Without dead ends: 1781 [2023-04-01 00:27:50,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:50,712 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 70 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:50,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 224 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:50,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2023-04-01 00:27:50,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1754. [2023-04-01 00:27:50,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1750 states have (on average 1.3982857142857144) internal successors, (2447), 1750 states have internal predecessors, (2447), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:51,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 2450 transitions. [2023-04-01 00:27:51,003 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 2450 transitions. Word has length 50 [2023-04-01 00:27:51,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:51,003 INFO L495 AbstractCegarLoop]: Abstraction has 1754 states and 2450 transitions. [2023-04-01 00:27:51,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:51,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 2450 transitions. [2023-04-01 00:27:51,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 00:27:51,004 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:51,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:51,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 00:27:51,004 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:51,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:51,005 INFO L85 PathProgramCache]: Analyzing trace with hash 191472632, now seen corresponding path program 1 times [2023-04-01 00:27:51,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:51,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288134393] [2023-04-01 00:27:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:51,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:51,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:51,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288134393] [2023-04-01 00:27:51,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288134393] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:51,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:51,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 00:27:51,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593903326] [2023-04-01 00:27:51,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:51,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 00:27:51,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:51,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 00:27:51,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-04-01 00:27:51,390 INFO L87 Difference]: Start difference. First operand 1754 states and 2450 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:52,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:52,294 INFO L93 Difference]: Finished difference Result 3999 states and 5639 transitions. [2023-04-01 00:27:52,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 00:27:52,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2023-04-01 00:27:52,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:52,307 INFO L225 Difference]: With dead ends: 3999 [2023-04-01 00:27:52,307 INFO L226 Difference]: Without dead ends: 3623 [2023-04-01 00:27:52,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2023-04-01 00:27:52,311 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 402 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:52,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 955 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:27:52,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2023-04-01 00:27:52,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 2445. [2023-04-01 00:27:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2445 states, 2441 states have (on average 1.4063908234330194) internal successors, (3433), 2441 states have internal predecessors, (3433), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:52,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2445 states to 2445 states and 3436 transitions. [2023-04-01 00:27:52,828 INFO L78 Accepts]: Start accepts. Automaton has 2445 states and 3436 transitions. Word has length 50 [2023-04-01 00:27:52,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:52,828 INFO L495 AbstractCegarLoop]: Abstraction has 2445 states and 3436 transitions. [2023-04-01 00:27:52,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:52,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2445 states and 3436 transitions. [2023-04-01 00:27:52,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 00:27:52,829 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:52,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:52,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 00:27:52,830 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:52,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:52,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1608216664, now seen corresponding path program 1 times [2023-04-01 00:27:52,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:52,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215046790] [2023-04-01 00:27:52,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:52,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:53,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:53,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215046790] [2023-04-01 00:27:53,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215046790] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:53,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:53,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 00:27:53,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381087507] [2023-04-01 00:27:53,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:53,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 00:27:53,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:53,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 00:27:53,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-04-01 00:27:53,326 INFO L87 Difference]: Start difference. First operand 2445 states and 3436 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:54,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:54,462 INFO L93 Difference]: Finished difference Result 3446 states and 4830 transitions. [2023-04-01 00:27:54,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 00:27:54,462 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2023-04-01 00:27:54,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:54,473 INFO L225 Difference]: With dead ends: 3446 [2023-04-01 00:27:54,473 INFO L226 Difference]: Without dead ends: 3382 [2023-04-01 00:27:54,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2023-04-01 00:27:54,476 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 308 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:54,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 893 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:27:54,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2023-04-01 00:27:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 2445. [2023-04-01 00:27:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2445 states, 2441 states have (on average 1.4063908234330194) internal successors, (3433), 2441 states have internal predecessors, (3433), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2445 states to 2445 states and 3436 transitions. [2023-04-01 00:27:54,928 INFO L78 Accepts]: Start accepts. Automaton has 2445 states and 3436 transitions. Word has length 50 [2023-04-01 00:27:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:54,928 INFO L495 AbstractCegarLoop]: Abstraction has 2445 states and 3436 transitions. [2023-04-01 00:27:54,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:54,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2445 states and 3436 transitions. [2023-04-01 00:27:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 00:27:54,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:54,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:54,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 00:27:54,929 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:54,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:54,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1312541126, now seen corresponding path program 1 times [2023-04-01 00:27:54,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:54,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750501403] [2023-04-01 00:27:54,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:54,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:54,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:54,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750501403] [2023-04-01 00:27:54,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750501403] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:54,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:54,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:54,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494083707] [2023-04-01 00:27:54,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:54,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:54,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:54,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:54,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:54,977 INFO L87 Difference]: Start difference. First operand 2445 states and 3436 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:55,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:55,478 INFO L93 Difference]: Finished difference Result 4189 states and 5934 transitions. [2023-04-01 00:27:55,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:55,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-04-01 00:27:55,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:55,486 INFO L225 Difference]: With dead ends: 4189 [2023-04-01 00:27:55,486 INFO L226 Difference]: Without dead ends: 2144 [2023-04-01 00:27:55,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:55,492 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 68 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:55,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 216 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2023-04-01 00:27:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 2141. [2023-04-01 00:27:55,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2137 states have (on average 1.4043051006083294) internal successors, (3001), 2137 states have internal predecessors, (3001), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:55,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 3004 transitions. [2023-04-01 00:27:55,919 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 3004 transitions. Word has length 51 [2023-04-01 00:27:55,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:55,920 INFO L495 AbstractCegarLoop]: Abstraction has 2141 states and 3004 transitions. [2023-04-01 00:27:55,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:55,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 3004 transitions. [2023-04-01 00:27:55,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 00:27:55,921 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:55,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:55,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 00:27:55,921 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:55,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:55,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1527202355, now seen corresponding path program 1 times [2023-04-01 00:27:55,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:55,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797842734] [2023-04-01 00:27:55,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:55,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:59,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:59,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797842734] [2023-04-01 00:27:59,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797842734] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:59,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:59,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-04-01 00:27:59,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027027919] [2023-04-01 00:27:59,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:59,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-01 00:27:59,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:59,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-01 00:27:59,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2023-04-01 00:27:59,014 INFO L87 Difference]: Start difference. First operand 2141 states and 3004 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:03,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:28:03,580 INFO L93 Difference]: Finished difference Result 2860 states and 4003 transitions. [2023-04-01 00:28:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 00:28:03,581 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-04-01 00:28:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:28:03,588 INFO L225 Difference]: With dead ends: 2860 [2023-04-01 00:28:03,588 INFO L226 Difference]: Without dead ends: 2800 [2023-04-01 00:28:03,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=569, Invalid=1593, Unknown=0, NotChecked=0, Total=2162 [2023-04-01 00:28:03,590 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 498 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:28:03,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 1000 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1639 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 00:28:03,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2023-04-01 00:28:04,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 2129. [2023-04-01 00:28:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2125 states have (on average 1.4061176470588235) internal successors, (2988), 2125 states have internal predecessors, (2988), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:04,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 2991 transitions. [2023-04-01 00:28:04,052 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 2991 transitions. Word has length 52 [2023-04-01 00:28:04,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:28:04,052 INFO L495 AbstractCegarLoop]: Abstraction has 2129 states and 2991 transitions. [2023-04-01 00:28:04,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:04,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 2991 transitions. [2023-04-01 00:28:04,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 00:28:04,054 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:28:04,054 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] [2023-04-01 00:28:04,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 00:28:04,054 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:28:04,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:28:04,054 INFO L85 PathProgramCache]: Analyzing trace with hash -944557451, now seen corresponding path program 1 times [2023-04-01 00:28:04,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:28:04,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980502017] [2023-04-01 00:28:04,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:28:04,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:28:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:28:04,163 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 00:28:04,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:28:04,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980502017] [2023-04-01 00:28:04,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980502017] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:28:04,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:28:04,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:28:04,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325065893] [2023-04-01 00:28:04,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:28:04,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:28:04,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:28:04,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:28:04,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:28:04,165 INFO L87 Difference]: Start difference. First operand 2129 states and 2991 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 00:28:04,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:28:04,901 INFO L93 Difference]: Finished difference Result 4368 states and 6181 transitions. [2023-04-01 00:28:04,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:28:04,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 55 [2023-04-01 00:28:04,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:28:04,927 INFO L225 Difference]: With dead ends: 4368 [2023-04-01 00:28:04,927 INFO L226 Difference]: Without dead ends: 2952 [2023-04-01 00:28:04,931 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 00:28:04,932 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 65 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:28:04,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 256 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:28:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2023-04-01 00:28:05,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2730. [2023-04-01 00:28:05,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2730 states, 2726 states have (on average 1.3943506969919295) internal successors, (3801), 2726 states have internal predecessors, (3801), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:05,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 3804 transitions. [2023-04-01 00:28:05,530 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 3804 transitions. Word has length 55 [2023-04-01 00:28:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:28:05,530 INFO L495 AbstractCegarLoop]: Abstraction has 2730 states and 3804 transitions. [2023-04-01 00:28:05,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 00:28:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 3804 transitions. [2023-04-01 00:28:05,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 00:28:05,531 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:28:05,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:28:05,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 00:28:05,531 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:28:05,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:28:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1517943154, now seen corresponding path program 1 times [2023-04-01 00:28:05,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:28:05,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760490828] [2023-04-01 00:28:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:28:05,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:28:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:28:05,637 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 00:28:05,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:28:05,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760490828] [2023-04-01 00:28:05,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760490828] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:28:05,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:28:05,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:28:05,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146140119] [2023-04-01 00:28:05,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:28:05,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:28:05,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:28:05,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:28:05,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:28:05,639 INFO L87 Difference]: Start difference. First operand 2730 states and 3804 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:28:06,536 INFO L93 Difference]: Finished difference Result 5444 states and 7622 transitions. [2023-04-01 00:28:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:28:06,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-01 00:28:06,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:28:06,544 INFO L225 Difference]: With dead ends: 5444 [2023-04-01 00:28:06,544 INFO L226 Difference]: Without dead ends: 3427 [2023-04-01 00:28:06,549 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 00:28:06,550 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 62 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:28:06,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 239 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:28:06,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2023-04-01 00:28:07,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3126. [2023-04-01 00:28:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3126 states, 3122 states have (on average 1.3811659192825112) internal successors, (4312), 3122 states have internal predecessors, (4312), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:07,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3126 states to 3126 states and 4315 transitions. [2023-04-01 00:28:07,246 INFO L78 Accepts]: Start accepts. Automaton has 3126 states and 4315 transitions. Word has length 57 [2023-04-01 00:28:07,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:28:07,247 INFO L495 AbstractCegarLoop]: Abstraction has 3126 states and 4315 transitions. [2023-04-01 00:28:07,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:07,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3126 states and 4315 transitions. [2023-04-01 00:28:07,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 00:28:07,248 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:28:07,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:28:07,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 00:28:07,248 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:28:07,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:28:07,249 INFO L85 PathProgramCache]: Analyzing trace with hash 328360973, now seen corresponding path program 1 times [2023-04-01 00:28:07,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:28:07,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458497132] [2023-04-01 00:28:07,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:28:07,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:28:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:28:07,308 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 00:28:07,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:28:07,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458497132] [2023-04-01 00:28:07,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458497132] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:28:07,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:28:07,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:28:07,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68487361] [2023-04-01 00:28:07,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:28:07,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:28:07,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:28:07,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:28:07,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:28:07,312 INFO L87 Difference]: Start difference. First operand 3126 states and 4315 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:08,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:28:08,147 INFO L93 Difference]: Finished difference Result 4344 states and 6003 transitions. [2023-04-01 00:28:08,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:28:08,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-01 00:28:08,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:28:08,156 INFO L225 Difference]: With dead ends: 4344 [2023-04-01 00:28:08,156 INFO L226 Difference]: Without dead ends: 3431 [2023-04-01 00:28:08,160 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 00:28:08,160 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 56 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:28:08,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 243 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:28:08,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2023-04-01 00:28:08,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 3370. [2023-04-01 00:28:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 3366 states have (on average 1.3734402852049912) internal successors, (4623), 3366 states have internal predecessors, (4623), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:08,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 4626 transitions. [2023-04-01 00:28:08,765 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 4626 transitions. Word has length 60 [2023-04-01 00:28:08,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:28:08,765 INFO L495 AbstractCegarLoop]: Abstraction has 3370 states and 4626 transitions. [2023-04-01 00:28:08,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:08,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 4626 transitions. [2023-04-01 00:28:08,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 00:28:08,766 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:28:08,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:28:08,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 00:28:08,767 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:28:08,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:28:08,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1365789779, now seen corresponding path program 1 times [2023-04-01 00:28:08,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:28:08,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643788416] [2023-04-01 00:28:08,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:28:08,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:28:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:28:08,847 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 00:28:08,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:28:08,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643788416] [2023-04-01 00:28:08,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643788416] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:28:08,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:28:08,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:28:08,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972685121] [2023-04-01 00:28:08,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:28:08,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:28:08,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:28:08,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:28:08,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:28:08,849 INFO L87 Difference]: Start difference. First operand 3370 states and 4626 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:09,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:28:09,800 INFO L93 Difference]: Finished difference Result 7508 states and 10360 transitions. [2023-04-01 00:28:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:28:09,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-01 00:28:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:28:09,809 INFO L225 Difference]: With dead ends: 7508 [2023-04-01 00:28:09,809 INFO L226 Difference]: Without dead ends: 4451 [2023-04-01 00:28:09,814 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 00:28:09,815 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 57 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:28:09,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 220 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:28:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2023-04-01 00:28:10,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 4064. [2023-04-01 00:28:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4064 states, 4060 states have (on average 1.3596059113300492) internal successors, (5520), 4060 states have internal predecessors, (5520), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:10,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4064 states to 4064 states and 5523 transitions. [2023-04-01 00:28:10,556 INFO L78 Accepts]: Start accepts. Automaton has 4064 states and 5523 transitions. Word has length 60 [2023-04-01 00:28:10,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:28:10,556 INFO L495 AbstractCegarLoop]: Abstraction has 4064 states and 5523 transitions. [2023-04-01 00:28:10,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:10,557 INFO L276 IsEmpty]: Start isEmpty. Operand 4064 states and 5523 transitions. [2023-04-01 00:28:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 00:28:10,558 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:28:10,558 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] [2023-04-01 00:28:10,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 00:28:10,558 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:28:10,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:28:10,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1524717898, now seen corresponding path program 1 times [2023-04-01 00:28:10,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:28:10,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594997602] [2023-04-01 00:28:10,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:28:10,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:28:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:28:10,780 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 00:28:10,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:28:10,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594997602] [2023-04-01 00:28:10,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594997602] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:28:10,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:28:10,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:28:10,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284700743] [2023-04-01 00:28:10,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:28:10,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:28:10,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:28:10,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:28:10,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:28:10,782 INFO L87 Difference]: Start difference. First operand 4064 states and 5523 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 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 00:28:12,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:28:12,218 INFO L93 Difference]: Finished difference Result 5535 states and 7456 transitions. [2023-04-01 00:28:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 00:28:12,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 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 65 [2023-04-01 00:28:12,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:28:12,229 INFO L225 Difference]: With dead ends: 5535 [2023-04-01 00:28:12,230 INFO L226 Difference]: Without dead ends: 5533 [2023-04-01 00:28:12,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:28:12,233 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 211 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:28:12,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 758 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:28:12,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2023-04-01 00:28:13,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 4768. [2023-04-01 00:28:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4768 states, 4764 states have (on average 1.3553736356003359) internal successors, (6457), 4764 states have internal predecessors, (6457), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4768 states to 4768 states and 6460 transitions. [2023-04-01 00:28:13,258 INFO L78 Accepts]: Start accepts. Automaton has 4768 states and 6460 transitions. Word has length 65 [2023-04-01 00:28:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:28:13,258 INFO L495 AbstractCegarLoop]: Abstraction has 4768 states and 6460 transitions. [2023-04-01 00:28:13,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 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 00:28:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4768 states and 6460 transitions. [2023-04-01 00:28:13,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 00:28:13,267 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:28:13,267 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:28:13,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 00:28:13,272 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:28:13,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:28:13,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1450490158, now seen corresponding path program 1 times [2023-04-01 00:28:13,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:28:13,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758160871] [2023-04-01 00:28:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:28:13,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:28:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:28:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 00:28:13,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:28:13,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758160871] [2023-04-01 00:28:13,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758160871] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:28:13,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:28:13,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:28:13,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975715853] [2023-04-01 00:28:13,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:28:13,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:28:13,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:28:13,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:28:13,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:28:13,486 INFO L87 Difference]: Start difference. First operand 4768 states and 6460 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:16,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:28:16,050 INFO L93 Difference]: Finished difference Result 14996 states and 20213 transitions. [2023-04-01 00:28:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 00:28:16,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-01 00:28:16,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:28:16,074 INFO L225 Difference]: With dead ends: 14996 [2023-04-01 00:28:16,075 INFO L226 Difference]: Without dead ends: 10941 [2023-04-01 00:28:16,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-04-01 00:28:16,083 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 810 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:28:16,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 239 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:28:16,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10941 states. [2023-04-01 00:28:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10941 to 7883. [2023-04-01 00:28:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7883 states, 7879 states have (on average 1.3317679908617845) internal successors, (10493), 7879 states have internal predecessors, (10493), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7883 states to 7883 states and 10496 transitions. [2023-04-01 00:28:17,856 INFO L78 Accepts]: Start accepts. Automaton has 7883 states and 10496 transitions. Word has length 73 [2023-04-01 00:28:17,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:28:17,856 INFO L495 AbstractCegarLoop]: Abstraction has 7883 states and 10496 transitions. [2023-04-01 00:28:17,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:17,856 INFO L276 IsEmpty]: Start isEmpty. Operand 7883 states and 10496 transitions. [2023-04-01 00:28:17,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 00:28:17,858 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:28:17,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:28:17,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 00:28:17,858 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:28:17,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:28:17,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1973522089, now seen corresponding path program 1 times [2023-04-01 00:28:17,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:28:17,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276767947] [2023-04-01 00:28:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:28:17,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:28:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:28:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:28:18,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:28:18,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276767947] [2023-04-01 00:28:18,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276767947] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:28:18,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95945692] [2023-04-01 00:28:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:28:18,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:28:18,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:28:18,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 00:28:18,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 00:28:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:28:18,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-01 00:28:18,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:28:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 00:28:20,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:28:20,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95945692] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:28:20,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:28:20,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [14] total 30 [2023-04-01 00:28:20,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383348545] [2023-04-01 00:28:20,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:28:20,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 00:28:20,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:28:20,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 00:28:20,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2023-04-01 00:28:20,463 INFO L87 Difference]: Start difference. First operand 7883 states and 10496 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:24,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:28:24,008 INFO L93 Difference]: Finished difference Result 10481 states and 13941 transitions. [2023-04-01 00:28:24,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 00:28:24,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-01 00:28:24,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:28:24,027 INFO L225 Difference]: With dead ends: 10481 [2023-04-01 00:28:24,027 INFO L226 Difference]: Without dead ends: 9003 [2023-04-01 00:28:24,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 00:28:24,033 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 624 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 00:28:24,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 887 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 00:28:24,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9003 states. [2023-04-01 00:28:25,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9003 to 8227. [2023-04-01 00:28:26,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8227 states, 8223 states have (on average 1.3304146905022498) internal successors, (10940), 8223 states have internal predecessors, (10940), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8227 states to 8227 states and 10943 transitions. [2023-04-01 00:28:26,016 INFO L78 Accepts]: Start accepts. Automaton has 8227 states and 10943 transitions. Word has length 73 [2023-04-01 00:28:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:28:26,016 INFO L495 AbstractCegarLoop]: Abstraction has 8227 states and 10943 transitions. [2023-04-01 00:28:26,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:28:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 8227 states and 10943 transitions. [2023-04-01 00:28:26,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 00:28:26,019 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:28:26,019 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:28:26,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 00:28:26,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:28:26,226 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:28:26,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:28:26,226 INFO L85 PathProgramCache]: Analyzing trace with hash -358092896, now seen corresponding path program 1 times [2023-04-01 00:28:26,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:28:26,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032572889] [2023-04-01 00:28:26,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:28:26,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:28:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:28:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 00:28:26,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:28:26,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032572889] [2023-04-01 00:28:26,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032572889] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:28:26,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:28:26,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:28:26,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19620901] [2023-04-01 00:28:26,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:28:26,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:28:26,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:28:26,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:28:26,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:28:26,402 INFO L87 Difference]: Start difference. First operand 8227 states and 10943 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 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)