/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 OctagonDomain -i ../sv-benchmarks/c/psyco/psyco_net_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:34:56,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:34:56,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:34:56,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 04:34:56,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:34:56,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:34:56,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:34:56,310 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 04:34:56,328 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:34:56,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:34:56,328 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:34:56,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:34:56,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:34:56,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:34:56,329 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:34:56,329 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:34:56,330 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:34:56,330 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:34:56,330 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:34:56,330 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:34:56,330 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:34:56,330 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:34:56,330 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:34:56,330 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:34:56,331 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:34:56,331 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:34:56,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:34:56,331 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:34:56,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:34:56,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:34:56,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:34:56,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:34:56,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:34:56,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:34:56,332 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:34:56,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:34:56,332 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:34:56,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:34:56,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:34:56,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:34:56,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:34:56,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:34:56,335 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:34:56,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:34:56,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:34:56,336 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:34:56,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:34:56,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:34:56,337 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:34:56,337 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:34:56,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:34:56,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:34:56,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:34:56,575 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:34:56,576 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:34:56,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/psyco/psyco_net_1.c [2023-04-01 04:34:57,778 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:34:58,493 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:34:58,493 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/psyco/psyco_net_1.c [2023-04-01 04:34:58,587 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ab61f584/59c88c68927d403e9671538c9829a754/FLAG750de12ae [2023-04-01 04:34:58,600 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ab61f584/59c88c68927d403e9671538c9829a754 [2023-04-01 04:34:58,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:34:58,604 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:34:58,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:34:58,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:34:58,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:34:58,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:34:58" (1/1) ... [2023-04-01 04:34:58,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@667fe5f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:34:58, skipping insertion in model container [2023-04-01 04:34:58,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:34:58" (1/1) ... [2023-04-01 04:34:58,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:34:59,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:35:00,228 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/psyco/psyco_net_1.c[2349407,2349420] [2023-04-01 04:35:00,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:35:00,295 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:35:00,927 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/psyco/psyco_net_1.c[2349407,2349420] [2023-04-01 04:35:00,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:35:00,979 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:35:00,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:35:00 WrapperNode [2023-04-01 04:35:00,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:35:00,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:35:00,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:35:00,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:35:00,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:35:00" (1/1) ... [2023-04-01 04:35:00,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:35:00" (1/1) ... [2023-04-01 04:35:01,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:35:00" (1/1) ... [2023-04-01 04:35:01,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:35:00" (1/1) ... [2023-04-01 04:35:01,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:35:00" (1/1) ... [2023-04-01 04:35:01,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:35:00" (1/1) ... [2023-04-01 04:35:01,839 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:35:00" (1/1) ... [2023-04-01 04:35:01,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:35:00" (1/1) ... [2023-04-01 04:35:02,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:35:02,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:35:02,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:35:02,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:35:02,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:35:00" (1/1) ... [2023-04-01 04:35:02,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:35:02,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:35:02,170 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 04:35:02,193 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 04:35:02,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:35:02,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:35:02,216 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:35:02,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:35:02,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:35:02,217 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:35:02,217 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:35:02,217 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:35:02,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:35:02,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:35:02,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:35:02,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:35:02,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:35:02,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:35:02,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:35:02,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:35:02,779 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:35:02,781 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:35:15,353 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:35:15,427 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:35:15,427 INFO L302 CfgBuilder]: Removed 1130 assume(true) statements. [2023-04-01 04:35:15,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:35:15 BoogieIcfgContainer [2023-04-01 04:35:15,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:35:15,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:35:15,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:35:15,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:35:15,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:34:58" (1/3) ... [2023-04-01 04:35:15,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14db2d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:35:15, skipping insertion in model container [2023-04-01 04:35:15,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:35:00" (2/3) ... [2023-04-01 04:35:15,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14db2d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:35:15, skipping insertion in model container [2023-04-01 04:35:15,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:35:15" (3/3) ... [2023-04-01 04:35:15,446 INFO L112 eAbstractionObserver]: Analyzing ICFG psyco_net_1.c [2023-04-01 04:35:15,460 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:35:15,460 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:35:15,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:35:15,631 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;@1b907965, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:35:15,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:35:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand has 9215 states, 9209 states have (on average 1.999457052883049) internal successors, (18413), 9210 states have internal predecessors, (18413), 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 04:35:15,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 04:35:15,674 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:35:15,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:35:15,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:35:15,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:35:15,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1633313428, now seen corresponding path program 1 times [2023-04-01 04:35:15,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:35:15,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228287258] [2023-04-01 04:35:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:35:15,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:35:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:35:15,990 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 04:35:15,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:35:15,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228287258] [2023-04-01 04:35:15,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228287258] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:35:15,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:35:15,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 04:35:15,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571255321] [2023-04-01 04:35:15,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:35:16,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 04:35:16,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:35:16,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 04:35:16,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:35:16,066 INFO L87 Difference]: Start difference. First operand has 9215 states, 9209 states have (on average 1.999457052883049) internal successors, (18413), 9210 states have internal predecessors, (18413), 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 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 04:35:16,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:35:16,334 INFO L93 Difference]: Finished difference Result 17703 states and 35385 transitions. [2023-04-01 04:35:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 04:35:16,336 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 12 [2023-04-01 04:35:16,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:35:16,385 INFO L225 Difference]: With dead ends: 17703 [2023-04-01 04:35:16,386 INFO L226 Difference]: Without dead ends: 8283 [2023-04-01 04:35:16,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:35:16,412 INFO L413 NwaCegarLoop]: 14150 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14150 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:35:16,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14150 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:35:16,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8283 states. [2023-04-01 04:35:16,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8283 to 8283. [2023-04-01 04:35:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8283 states, 8279 states have (on average 1.5698755888392317) internal successors, (12997), 8279 states have internal predecessors, (12997), 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 04:35:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8283 states to 8283 states and 13000 transitions. [2023-04-01 04:35:16,645 INFO L78 Accepts]: Start accepts. Automaton has 8283 states and 13000 transitions. Word has length 12 [2023-04-01 04:35:16,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:35:16,645 INFO L495 AbstractCegarLoop]: Abstraction has 8283 states and 13000 transitions. [2023-04-01 04:35:16,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 04:35:16,646 INFO L276 IsEmpty]: Start isEmpty. Operand 8283 states and 13000 transitions. [2023-04-01 04:35:16,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 04:35:16,647 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:35:16,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:35:16,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:35:16,647 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:35:16,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:35:16,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1437952785, now seen corresponding path program 1 times [2023-04-01 04:35:16,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:35:16,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135942270] [2023-04-01 04:35:16,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:35:16,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:35:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:35:16,887 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 04:35:16,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:35:16,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135942270] [2023-04-01 04:35:16,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135942270] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:35:16,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:35:16,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:35:16,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107945579] [2023-04-01 04:35:16,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:35:16,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:35:16,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:35:16,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:35:16,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:35:16,891 INFO L87 Difference]: Start difference. First operand 8283 states and 13000 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 04:35:18,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:35:18,432 INFO L93 Difference]: Finished difference Result 16564 states and 25999 transitions. [2023-04-01 04:35:18,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:35:18,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 13 [2023-04-01 04:35:18,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:35:18,469 INFO L225 Difference]: With dead ends: 16564 [2023-04-01 04:35:18,469 INFO L226 Difference]: Without dead ends: 8286 [2023-04-01 04:35:18,488 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 04:35:18,490 INFO L413 NwaCegarLoop]: 12998 mSDtfsCounter, 4 mSDsluCounter, 11522 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24520 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:35:18,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 24520 Invalid, 1476 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 04:35:18,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8286 states. [2023-04-01 04:35:18,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8286 to 8286. [2023-04-01 04:35:18,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8286 states, 8282 states have (on average 1.569669162038155) internal successors, (13000), 8282 states have internal predecessors, (13000), 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 04:35:18,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8286 states to 8286 states and 13003 transitions. [2023-04-01 04:35:18,677 INFO L78 Accepts]: Start accepts. Automaton has 8286 states and 13003 transitions. Word has length 13 [2023-04-01 04:35:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:35:18,681 INFO L495 AbstractCegarLoop]: Abstraction has 8286 states and 13003 transitions. [2023-04-01 04:35:18,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 04:35:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 8286 states and 13003 transitions. [2023-04-01 04:35:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 04:35:18,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:35:18,689 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:35:18,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:35:18,690 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:35:18,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:35:18,691 INFO L85 PathProgramCache]: Analyzing trace with hash 873597231, now seen corresponding path program 1 times [2023-04-01 04:35:18,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:35:18,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108960523] [2023-04-01 04:35:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:35:18,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:35:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:35:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:35:18,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:35:18,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108960523] [2023-04-01 04:35:18,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108960523] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:35:18,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:35:18,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:35:18,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697537394] [2023-04-01 04:35:18,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:35:18,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:35:18,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:35:18,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:35:18,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:35:18,803 INFO L87 Difference]: Start difference. First operand 8286 states and 13003 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 04:35:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:35:20,330 INFO L93 Difference]: Finished difference Result 16572 states and 26008 transitions. [2023-04-01 04:35:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:35:20,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 18 [2023-04-01 04:35:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:35:20,376 INFO L225 Difference]: With dead ends: 16572 [2023-04-01 04:35:20,376 INFO L226 Difference]: Without dead ends: 8292 [2023-04-01 04:35:20,396 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 04:35:20,397 INFO L413 NwaCegarLoop]: 12997 mSDtfsCounter, 329 mSDsluCounter, 11199 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 24196 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:35:20,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 24196 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 04:35:20,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8292 states. [2023-04-01 04:35:20,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8292 to 8290. [2023-04-01 04:35:20,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8290 states, 8286 states have (on average 1.5693941588221096) internal successors, (13004), 8286 states have internal predecessors, (13004), 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 04:35:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8290 states to 8290 states and 13007 transitions. [2023-04-01 04:35:20,559 INFO L78 Accepts]: Start accepts. Automaton has 8290 states and 13007 transitions. Word has length 18 [2023-04-01 04:35:20,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:35:20,559 INFO L495 AbstractCegarLoop]: Abstraction has 8290 states and 13007 transitions. [2023-04-01 04:35:20,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 04:35:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 8290 states and 13007 transitions. [2023-04-01 04:35:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 04:35:20,560 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:35:20,561 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:35:20,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:35:20,561 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:35:20,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:35:20,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1871576988, now seen corresponding path program 1 times [2023-04-01 04:35:20,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:35:20,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756924570] [2023-04-01 04:35:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:35:20,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:35:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:35:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:35:20,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:35:20,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756924570] [2023-04-01 04:35:20,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756924570] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:35:20,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:35:20,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:35:20,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892443998] [2023-04-01 04:35:20,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:35:20,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:35:20,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:35:20,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:35:20,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:35:20,654 INFO L87 Difference]: Start difference. First operand 8290 states and 13007 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 04:35:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:35:23,481 INFO L93 Difference]: Finished difference Result 16494 states and 25888 transitions. [2023-04-01 04:35:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:35:23,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 22 [2023-04-01 04:35:23,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:35:23,498 INFO L225 Difference]: With dead ends: 16494 [2023-04-01 04:35:23,499 INFO L226 Difference]: Without dead ends: 8168 [2023-04-01 04:35:23,514 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 04:35:23,515 INFO L413 NwaCegarLoop]: 10000 mSDtfsCounter, 11116 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 2420 mSolverCounterSat, 1749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11116 SdHoareTripleChecker+Valid, 10003 SdHoareTripleChecker+Invalid, 4169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1749 IncrementalHoareTripleChecker+Valid, 2420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:35:23,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11116 Valid, 10003 Invalid, 4169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1749 Valid, 2420 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 04:35:23,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8168 states. [2023-04-01 04:35:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8168 to 8168. [2023-04-01 04:35:23,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8168 states, 8164 states have (on average 1.5165360117589417) internal successors, (12381), 8164 states have internal predecessors, (12381), 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 04:35:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8168 states to 8168 states and 12384 transitions. [2023-04-01 04:35:23,659 INFO L78 Accepts]: Start accepts. Automaton has 8168 states and 12384 transitions. Word has length 22 [2023-04-01 04:35:23,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:35:23,659 INFO L495 AbstractCegarLoop]: Abstraction has 8168 states and 12384 transitions. [2023-04-01 04:35:23,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 04:35:23,659 INFO L276 IsEmpty]: Start isEmpty. Operand 8168 states and 12384 transitions. [2023-04-01 04:35:23,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 04:35:23,660 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:35:23,660 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 04:35:23,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:35:23,661 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:35:23,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:35:23,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1349943236, now seen corresponding path program 1 times [2023-04-01 04:35:23,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:35:23,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905720460] [2023-04-01 04:35:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:35:23,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:35:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:35:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:35:23,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:35:23,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905720460] [2023-04-01 04:35:23,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905720460] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:35:23,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:35:23,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:35:23,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241630664] [2023-04-01 04:35:23,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:35:23,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:35:23,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:35:23,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:35:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:35:23,720 INFO L87 Difference]: Start difference. First operand 8168 states and 12384 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 04:35:26,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:35:26,358 INFO L93 Difference]: Finished difference Result 24492 states and 37140 transitions. [2023-04-01 04:35:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:35:26,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 26 [2023-04-01 04:35:26,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:35:26,400 INFO L225 Difference]: With dead ends: 24492 [2023-04-01 04:35:26,400 INFO L226 Difference]: Without dead ends: 16280 [2023-04-01 04:35:26,421 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 04:35:26,421 INFO L413 NwaCegarLoop]: 10926 mSDtfsCounter, 11045 mSDsluCounter, 10883 mSDsCounter, 0 mSdLazyCounter, 2813 mSolverCounterSat, 1427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11045 SdHoareTripleChecker+Valid, 21809 SdHoareTripleChecker+Invalid, 4240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1427 IncrementalHoareTripleChecker+Valid, 2813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:35:26,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11045 Valid, 21809 Invalid, 4240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1427 Valid, 2813 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 04:35:26,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16280 states. [2023-04-01 04:35:26,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16280 to 14966. [2023-04-01 04:35:26,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14966 states, 14962 states have (on average 1.5566100788664616) internal successors, (23290), 14962 states have internal predecessors, (23290), 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 04:35:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14966 states to 14966 states and 23293 transitions. [2023-04-01 04:35:26,699 INFO L78 Accepts]: Start accepts. Automaton has 14966 states and 23293 transitions. Word has length 26 [2023-04-01 04:35:26,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:35:26,699 INFO L495 AbstractCegarLoop]: Abstraction has 14966 states and 23293 transitions. [2023-04-01 04:35:26,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 04:35:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 14966 states and 23293 transitions. [2023-04-01 04:35:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 04:35:26,704 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:35:26,705 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 04:35:26,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:35:26,705 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:35:26,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:35:26,705 INFO L85 PathProgramCache]: Analyzing trace with hash 106681389, now seen corresponding path program 1 times [2023-04-01 04:35:26,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:35:26,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607998442] [2023-04-01 04:35:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:35:26,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:35:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:35:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:35:26,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:35:26,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607998442] [2023-04-01 04:35:26,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607998442] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:35:26,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:35:26,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:35:26,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821411030] [2023-04-01 04:35:26,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:35:26,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:35:26,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:35:26,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:35:26,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:35:26,810 INFO L87 Difference]: Start difference. First operand 14966 states and 23293 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 04:35:30,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:35:30,918 INFO L93 Difference]: Finished difference Result 37766 states and 58563 transitions. [2023-04-01 04:35:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:35:30,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 28 [2023-04-01 04:35:30,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:35:30,972 INFO L225 Difference]: With dead ends: 37766 [2023-04-01 04:35:30,973 INFO L226 Difference]: Without dead ends: 22524 [2023-04-01 04:35:31,006 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 04:35:31,008 INFO L413 NwaCegarLoop]: 10504 mSDtfsCounter, 10474 mSDsluCounter, 9631 mSDsCounter, 0 mSdLazyCounter, 4457 mSolverCounterSat, 1487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10474 SdHoareTripleChecker+Valid, 20135 SdHoareTripleChecker+Invalid, 5944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1487 IncrementalHoareTripleChecker+Valid, 4457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:35:31,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10474 Valid, 20135 Invalid, 5944 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1487 Valid, 4457 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 04:35:31,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22524 states. [2023-04-01 04:35:31,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22524 to 21284. [2023-04-01 04:35:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21284 states, 21280 states have (on average 1.5518796992481203) internal successors, (33024), 21280 states have internal predecessors, (33024), 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 04:35:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21284 states to 21284 states and 33027 transitions. [2023-04-01 04:35:31,391 INFO L78 Accepts]: Start accepts. Automaton has 21284 states and 33027 transitions. Word has length 28 [2023-04-01 04:35:31,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:35:31,391 INFO L495 AbstractCegarLoop]: Abstraction has 21284 states and 33027 transitions. [2023-04-01 04:35:31,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 04:35:31,391 INFO L276 IsEmpty]: Start isEmpty. Operand 21284 states and 33027 transitions. [2023-04-01 04:35:31,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 04:35:31,393 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:35:31,393 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 04:35:31,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 04:35:31,394 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:35:31,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:35:31,394 INFO L85 PathProgramCache]: Analyzing trace with hash 321390559, now seen corresponding path program 1 times [2023-04-01 04:35:31,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:35:31,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034804815] [2023-04-01 04:35:31,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:35:31,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:35:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:35:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:35:31,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:35:31,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034804815] [2023-04-01 04:35:31,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034804815] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:35:31,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:35:31,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:35:31,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097954331] [2023-04-01 04:35:31,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:35:31,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:35:31,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:35:31,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:35:31,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:35:31,514 INFO L87 Difference]: Start difference. First operand 21284 states and 33027 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 04:35:39,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:35:39,757 INFO L93 Difference]: Finished difference Result 84588 states and 131302 transitions. [2023-04-01 04:35:39,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:35:39,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 33 [2023-04-01 04:35:39,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:35:39,946 INFO L225 Difference]: With dead ends: 84588 [2023-04-01 04:35:39,946 INFO L226 Difference]: Without dead ends: 63310 [2023-04-01 04:35:39,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:35:39,999 INFO L413 NwaCegarLoop]: 30490 mSDtfsCounter, 22022 mSDsluCounter, 18265 mSDsCounter, 0 mSdLazyCounter, 11451 mSolverCounterSat, 2594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22022 SdHoareTripleChecker+Valid, 48755 SdHoareTripleChecker+Invalid, 14045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2594 IncrementalHoareTripleChecker+Valid, 11451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:35:39,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22022 Valid, 48755 Invalid, 14045 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2594 Valid, 11451 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-04-01 04:35:40,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63310 states. [2023-04-01 04:35:40,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63310 to 59212. [2023-04-01 04:35:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59212 states, 59208 states have (on average 1.5856978786650453) internal successors, (93886), 59208 states have internal predecessors, (93886), 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 04:35:41,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59212 states to 59212 states and 93889 transitions. [2023-04-01 04:35:41,665 INFO L78 Accepts]: Start accepts. Automaton has 59212 states and 93889 transitions. Word has length 33 [2023-04-01 04:35:41,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:35:41,665 INFO L495 AbstractCegarLoop]: Abstraction has 59212 states and 93889 transitions. [2023-04-01 04:35:41,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 04:35:41,665 INFO L276 IsEmpty]: Start isEmpty. Operand 59212 states and 93889 transitions. [2023-04-01 04:35:41,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 04:35:41,671 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:35:41,671 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-01 04:35:41,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 04:35:41,672 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:35:41,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:35:41,672 INFO L85 PathProgramCache]: Analyzing trace with hash -687238814, now seen corresponding path program 1 times [2023-04-01 04:35:41,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:35:41,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659056051] [2023-04-01 04:35:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:35:41,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:35:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:35:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:35:41,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:35:41,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659056051] [2023-04-01 04:35:41,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659056051] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:35:41,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:35:41,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:35:41,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043201429] [2023-04-01 04:35:41,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:35:41,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:35:41,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:35:41,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:35:41,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:35:41,778 INFO L87 Difference]: Start difference. First operand 59212 states and 93889 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 04:35:43,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:35:43,488 INFO L93 Difference]: Finished difference Result 118465 states and 187854 transitions. [2023-04-01 04:35:43,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:35:43,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 39 [2023-04-01 04:35:43,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:35:43,613 INFO L225 Difference]: With dead ends: 118465 [2023-04-01 04:35:43,613 INFO L226 Difference]: Without dead ends: 59259 [2023-04-01 04:35:43,829 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 04:35:43,845 INFO L413 NwaCegarLoop]: 12344 mSDtfsCounter, 305 mSDsluCounter, 10701 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 23045 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:35:43,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 23045 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 04:35:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59259 states. [2023-04-01 04:35:44,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59259 to 59257. [2023-04-01 04:35:44,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59257 states, 59253 states have (on average 1.5852530673552394) internal successors, (93931), 59253 states have internal predecessors, (93931), 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 04:35:45,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59257 states to 59257 states and 93934 transitions. [2023-04-01 04:35:45,036 INFO L78 Accepts]: Start accepts. Automaton has 59257 states and 93934 transitions. Word has length 39 [2023-04-01 04:35:45,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:35:45,036 INFO L495 AbstractCegarLoop]: Abstraction has 59257 states and 93934 transitions. [2023-04-01 04:35:45,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 04:35:45,037 INFO L276 IsEmpty]: Start isEmpty. Operand 59257 states and 93934 transitions. [2023-04-01 04:35:45,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 04:35:45,037 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:35:45,037 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 04:35:45,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 04:35:45,038 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:35:45,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:35:45,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1284753502, now seen corresponding path program 1 times [2023-04-01 04:35:45,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:35:45,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476037664] [2023-04-01 04:35:45,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:35:45,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:35:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:35:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:35:45,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:35:45,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476037664] [2023-04-01 04:35:45,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476037664] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:35:45,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:35:45,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:35:45,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438966947] [2023-04-01 04:35:45,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:35:45,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:35:45,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:35:45,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:35:45,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:35:45,243 INFO L87 Difference]: Start difference. First operand 59257 states and 93934 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)