/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 EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:38:14,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:38:14,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:38:14,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 12:38:14,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:38:14,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:38:14,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:38:14,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:38:14,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:38:14,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:38:14,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:38:14,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:38:14,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:38:14,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:38:14,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:38:14,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:38:14,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 12:38:14,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:38:14,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:38:14,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:38:14,522 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 12:38:14,551 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:38:14,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:38:14,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:38:14,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:38:14,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:38:14,553 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:38:14,553 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:38:14,553 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:38:14,553 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:38:14,554 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:38:14,554 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:38:14,554 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:38:14,555 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:38:14,555 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:38:14,555 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:38:14,555 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:38:14,555 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:38:14,555 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:38:14,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:38:14,556 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:38:14,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:38:14,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:38:14,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:38:14,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:38:14,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:38:14,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:38:14,558 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:38:14,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:38:14,558 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:38:14,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:38:14,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:38:14,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:38:14,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:38:14,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:38:14,559 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:38:14,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:38:14,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:38:14,559 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:38:14,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:38:14,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:38:14,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:38:14,560 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:38:14,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:38:14,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:38:14,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:38:14,823 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:38:14,824 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:38:14,825 INFO L432 ainManager$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.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 12:38:15,919 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:38:16,106 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:38:16,107 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 12:38:16,115 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5035fd17/2fef5ebf721143938e24ada8203a508b/FLAGf9d645f31 [2023-04-01 12:38:16,128 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5035fd17/2fef5ebf721143938e24ada8203a508b [2023-04-01 12:38:16,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:38:16,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:38:16,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:38:16,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:38:16,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:38:16,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:38:16" (1/1) ... [2023-04-01 12:38:16,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fcafae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:16, skipping insertion in model container [2023-04-01 12:38:16,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:38:16" (1/1) ... [2023-04-01 12:38:16,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:38:16,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:38:16,435 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.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7163,7176] [2023-04-01 12:38:16,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:38:16,517 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:38:16,578 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.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7163,7176] [2023-04-01 12:38:16,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:38:16,627 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:38:16,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:16 WrapperNode [2023-04-01 12:38:16,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:38:16,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:38:16,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:38:16,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:38:16,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:16" (1/1) ... [2023-04-01 12:38:16,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:16" (1/1) ... [2023-04-01 12:38:16,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:16" (1/1) ... [2023-04-01 12:38:16,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:16" (1/1) ... [2023-04-01 12:38:16,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:16" (1/1) ... [2023-04-01 12:38:16,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:16" (1/1) ... [2023-04-01 12:38:16,695 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:16" (1/1) ... [2023-04-01 12:38:16,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:16" (1/1) ... [2023-04-01 12:38:16,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:38:16,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:38:16,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:38:16,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:38:16,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:16" (1/1) ... [2023-04-01 12:38:16,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:38:16,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:38:16,738 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 12:38:16,747 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 12:38:16,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:38:16,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:38:16,780 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:38:16,780 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:38:16,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:38:16,781 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:38:16,781 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:38:16,781 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:38:16,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:38:16,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:38:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:38:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:38:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:38:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:38:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:38:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:38:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:38:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:38:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:38:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:38:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:38:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:38:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:38:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:38:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:38:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:38:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:38:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:38:16,884 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:38:16,887 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:38:17,505 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:38:17,687 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:38:17,688 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:38:17,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:38:17 BoogieIcfgContainer [2023-04-01 12:38:17,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:38:17,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:38:17,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:38:17,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:38:17,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:38:16" (1/3) ... [2023-04-01 12:38:17,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d71c4dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:38:17, skipping insertion in model container [2023-04-01 12:38:17,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:16" (2/3) ... [2023-04-01 12:38:17,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d71c4dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:38:17, skipping insertion in model container [2023-04-01 12:38:17,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:38:17" (3/3) ... [2023-04-01 12:38:17,697 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 12:38:17,712 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:38:17,713 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:38:17,783 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:38:17,788 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;@1734d438, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:38:17,788 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:38:17,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 116 states have (on average 1.6810344827586208) internal successors, (195), 117 states have internal predecessors, (195), 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 12:38:17,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 12:38:17,801 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:17,801 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 12:38:17,802 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:17,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:17,807 INFO L85 PathProgramCache]: Analyzing trace with hash 73496894, now seen corresponding path program 1 times [2023-04-01 12:38:17,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:17,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834657108] [2023-04-01 12:38:17,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:17,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:18,293 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 12:38:18,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:18,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834657108] [2023-04-01 12:38:18,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834657108] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:18,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:18,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:38:18,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416061259] [2023-04-01 12:38:18,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:18,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:38:18,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:18,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:38:18,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:38:18,325 INFO L87 Difference]: Start difference. First operand has 122 states, 116 states have (on average 1.6810344827586208) internal successors, (195), 117 states have internal predecessors, (195), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:18,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:18,492 INFO L93 Difference]: Finished difference Result 325 states and 512 transitions. [2023-04-01 12:38:18,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:38:18,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-04-01 12:38:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:18,503 INFO L225 Difference]: With dead ends: 325 [2023-04-01 12:38:18,503 INFO L226 Difference]: Without dead ends: 235 [2023-04-01 12:38:18,506 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 12:38:18,509 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 422 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:18,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 522 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:18,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-04-01 12:38:18,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 231. [2023-04-01 12:38:18,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 227 states have (on average 1.3920704845814977) internal successors, (316), 227 states have internal predecessors, (316), 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 12:38:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 319 transitions. [2023-04-01 12:38:18,582 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 319 transitions. Word has length 46 [2023-04-01 12:38:18,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:18,583 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 319 transitions. [2023-04-01 12:38:18,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:18,583 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 319 transitions. [2023-04-01 12:38:18,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 12:38:18,586 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:18,586 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 12:38:18,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:38:18,586 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:18,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:18,588 INFO L85 PathProgramCache]: Analyzing trace with hash -752880333, now seen corresponding path program 1 times [2023-04-01 12:38:18,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:18,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216387146] [2023-04-01 12:38:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:18,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:18,818 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 12:38:18,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:18,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216387146] [2023-04-01 12:38:18,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216387146] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:18,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:18,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:38:18,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582882887] [2023-04-01 12:38:18,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:18,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:38:18,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:18,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:38:18,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:38:18,823 INFO L87 Difference]: Start difference. First operand 231 states and 319 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 12:38:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:19,044 INFO L93 Difference]: Finished difference Result 504 states and 710 transitions. [2023-04-01 12:38:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:38:19,045 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 12:38:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:19,052 INFO L225 Difference]: With dead ends: 504 [2023-04-01 12:38:19,057 INFO L226 Difference]: Without dead ends: 303 [2023-04-01 12:38:19,078 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 12:38:19,080 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 405 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:19,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 163 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:19,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-04-01 12:38:19,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 301. [2023-04-01 12:38:19,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 297 states have (on average 1.3973063973063973) internal successors, (415), 297 states have internal predecessors, (415), 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 12:38:19,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 418 transitions. [2023-04-01 12:38:19,128 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 418 transitions. Word has length 47 [2023-04-01 12:38:19,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:19,129 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 418 transitions. [2023-04-01 12:38:19,129 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 12:38:19,129 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 418 transitions. [2023-04-01 12:38:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 12:38:19,130 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:19,131 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 12:38:19,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:38:19,131 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:19,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:19,131 INFO L85 PathProgramCache]: Analyzing trace with hash -915948847, now seen corresponding path program 1 times [2023-04-01 12:38:19,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:19,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309015900] [2023-04-01 12:38:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:19,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:19,247 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 12:38:19,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:19,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309015900] [2023-04-01 12:38:19,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309015900] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:19,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:19,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:38:19,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417003155] [2023-04-01 12:38:19,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:19,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:38:19,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:19,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:38:19,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:38:19,251 INFO L87 Difference]: Start difference. First operand 301 states and 418 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 12:38:19,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:19,482 INFO L93 Difference]: Finished difference Result 702 states and 1000 transitions. [2023-04-01 12:38:19,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:38:19,482 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 12:38:19,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:19,485 INFO L225 Difference]: With dead ends: 702 [2023-04-01 12:38:19,485 INFO L226 Difference]: Without dead ends: 467 [2023-04-01 12:38:19,488 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 12:38:19,489 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 374 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:19,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 183 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:19,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2023-04-01 12:38:19,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 465. [2023-04-01 12:38:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 461 states have (on average 1.4143167028199566) internal successors, (652), 461 states have internal predecessors, (652), 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 12:38:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 655 transitions. [2023-04-01 12:38:19,560 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 655 transitions. Word has length 47 [2023-04-01 12:38:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:19,561 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 655 transitions. [2023-04-01 12:38:19,561 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 12:38:19,561 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 655 transitions. [2023-04-01 12:38:19,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 12:38:19,562 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:19,562 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 12:38:19,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:38:19,563 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:19,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:19,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1668955650, now seen corresponding path program 1 times [2023-04-01 12:38:19,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:19,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785681777] [2023-04-01 12:38:19,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:19,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:19,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:19,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785681777] [2023-04-01 12:38:19,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785681777] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:19,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:19,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:38:19,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430931205] [2023-04-01 12:38:19,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:19,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:38:19,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:19,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:38:19,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:38:19,704 INFO L87 Difference]: Start difference. First operand 465 states and 655 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 12:38:19,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:19,946 INFO L93 Difference]: Finished difference Result 1214 states and 1741 transitions. [2023-04-01 12:38:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:38:19,946 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 12:38:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:19,950 INFO L225 Difference]: With dead ends: 1214 [2023-04-01 12:38:19,950 INFO L226 Difference]: Without dead ends: 795 [2023-04-01 12:38:19,951 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 12:38:19,952 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 379 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:19,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 175 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:19,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2023-04-01 12:38:20,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 793. [2023-04-01 12:38:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 789 states have (on average 1.4195183776932827) internal successors, (1120), 789 states have internal predecessors, (1120), 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 12:38:20,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1123 transitions. [2023-04-01 12:38:20,065 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1123 transitions. Word has length 47 [2023-04-01 12:38:20,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:20,065 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1123 transitions. [2023-04-01 12:38:20,065 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 12:38:20,066 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1123 transitions. [2023-04-01 12:38:20,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 12:38:20,066 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:20,067 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 12:38:20,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:38:20,067 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:20,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:20,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1216045037, now seen corresponding path program 1 times [2023-04-01 12:38:20,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:20,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548019751] [2023-04-01 12:38:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:20,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:20,651 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 12:38:20,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:20,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548019751] [2023-04-01 12:38:20,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548019751] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:20,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:20,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:38:20,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009657724] [2023-04-01 12:38:20,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:20,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:38:20,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:20,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:38:20,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:38:20,654 INFO L87 Difference]: Start difference. First operand 793 states and 1123 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:21,425 INFO L93 Difference]: Finished difference Result 2212 states and 3187 transitions. [2023-04-01 12:38:21,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 12:38:21,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-04-01 12:38:21,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:21,432 INFO L225 Difference]: With dead ends: 2212 [2023-04-01 12:38:21,432 INFO L226 Difference]: Without dead ends: 1538 [2023-04-01 12:38:21,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2023-04-01 12:38:21,437 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 871 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:21,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 604 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:38:21,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2023-04-01 12:38:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1192. [2023-04-01 12:38:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1188 states have (on average 1.4141414141414141) internal successors, (1680), 1188 states have internal predecessors, (1680), 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 12:38:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1683 transitions. [2023-04-01 12:38:21,682 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1683 transitions. Word has length 48 [2023-04-01 12:38:21,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:21,684 INFO L495 AbstractCegarLoop]: Abstraction has 1192 states and 1683 transitions. [2023-04-01 12:38:21,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1683 transitions. [2023-04-01 12:38:21,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 12:38:21,686 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:21,686 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 12:38:21,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:38:21,687 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:21,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:21,687 INFO L85 PathProgramCache]: Analyzing trace with hash -2075174701, now seen corresponding path program 1 times [2023-04-01 12:38:21,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:21,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089694034] [2023-04-01 12:38:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:21,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:22,115 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 12:38:22,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:22,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089694034] [2023-04-01 12:38:22,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089694034] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:22,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:22,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 12:38:22,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193617063] [2023-04-01 12:38:22,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:22,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 12:38:22,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:22,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 12:38:22,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:38:22,118 INFO L87 Difference]: Start difference. First operand 1192 states and 1683 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 12:38:22,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:22,992 INFO L93 Difference]: Finished difference Result 2444 states and 3471 transitions. [2023-04-01 12:38:22,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 12:38:22,993 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 12:38:22,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:23,001 INFO L225 Difference]: With dead ends: 2444 [2023-04-01 12:38:23,002 INFO L226 Difference]: Without dead ends: 2291 [2023-04-01 12:38:23,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-04-01 12:38:23,003 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 1092 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1092 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:23,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1092 Valid, 774 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:38:23,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2023-04-01 12:38:23,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1616. [2023-04-01 12:38:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1612 states have (on average 1.4075682382133996) internal successors, (2269), 1612 states have internal predecessors, (2269), 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 12:38:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2272 transitions. [2023-04-01 12:38:23,321 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2272 transitions. Word has length 48 [2023-04-01 12:38:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:23,321 INFO L495 AbstractCegarLoop]: Abstraction has 1616 states and 2272 transitions. [2023-04-01 12:38:23,322 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 12:38:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2272 transitions. [2023-04-01 12:38:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 12:38:23,322 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:23,323 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 12:38:23,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:38:23,323 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:23,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:23,324 INFO L85 PathProgramCache]: Analyzing trace with hash 887889011, now seen corresponding path program 1 times [2023-04-01 12:38:23,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:23,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044013257] [2023-04-01 12:38:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:23,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:23,684 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 12:38:23,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:23,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044013257] [2023-04-01 12:38:23,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044013257] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:23,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:23,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 12:38:23,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507743395] [2023-04-01 12:38:23,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:23,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 12:38:23,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:23,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 12:38:23,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:38:23,687 INFO L87 Difference]: Start difference. First operand 1616 states and 2272 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 12:38:24,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:24,634 INFO L93 Difference]: Finished difference Result 3295 states and 4693 transitions. [2023-04-01 12:38:24,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 12:38:24,634 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 12:38:24,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:24,645 INFO L225 Difference]: With dead ends: 3295 [2023-04-01 12:38:24,646 INFO L226 Difference]: Without dead ends: 2844 [2023-04-01 12:38:24,647 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 12:38:24,649 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 970 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:24,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 813 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:38:24,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2023-04-01 12:38:25,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 2149. [2023-04-01 12:38:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2149 states, 2145 states have (on average 1.400932400932401) internal successors, (3005), 2145 states have internal predecessors, (3005), 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 12:38:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2149 states to 2149 states and 3008 transitions. [2023-04-01 12:38:25,013 INFO L78 Accepts]: Start accepts. Automaton has 2149 states and 3008 transitions. Word has length 48 [2023-04-01 12:38:25,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:25,014 INFO L495 AbstractCegarLoop]: Abstraction has 2149 states and 3008 transitions. [2023-04-01 12:38:25,014 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 12:38:25,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2149 states and 3008 transitions. [2023-04-01 12:38:25,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 12:38:25,015 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:25,015 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 12:38:25,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:38:25,015 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:25,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:25,016 INFO L85 PathProgramCache]: Analyzing trace with hash -79421848, now seen corresponding path program 1 times [2023-04-01 12:38:25,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:25,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137515858] [2023-04-01 12:38:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:25,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:25,511 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 12:38:25,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:25,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137515858] [2023-04-01 12:38:25,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137515858] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:25,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:25,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 12:38:25,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062239064] [2023-04-01 12:38:25,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:25,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:38:25,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:25,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:38:25,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:38:25,513 INFO L87 Difference]: Start difference. First operand 2149 states and 3008 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 12:38:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:26,834 INFO L93 Difference]: Finished difference Result 4221 states and 5951 transitions. [2023-04-01 12:38:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 12:38:26,834 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 12:38:26,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:26,849 INFO L225 Difference]: With dead ends: 4221 [2023-04-01 12:38:26,849 INFO L226 Difference]: Without dead ends: 3563 [2023-04-01 12:38:26,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:38:26,853 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 384 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:26,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 1221 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:38:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2023-04-01 12:38:27,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 2180. [2023-04-01 12:38:27,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2176 states have (on average 1.396139705882353) internal successors, (3038), 2176 states have internal predecessors, (3038), 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 12:38:27,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 3041 transitions. [2023-04-01 12:38:27,256 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 3041 transitions. Word has length 50 [2023-04-01 12:38:27,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:27,257 INFO L495 AbstractCegarLoop]: Abstraction has 2180 states and 3041 transitions. [2023-04-01 12:38:27,257 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 12:38:27,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 3041 transitions. [2023-04-01 12:38:27,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 12:38:27,258 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:27,258 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 12:38:27,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:38:27,258 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:27,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:27,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1411325432, now seen corresponding path program 1 times [2023-04-01 12:38:27,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:27,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270349865] [2023-04-01 12:38:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:27,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:27,660 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 12:38:27,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:27,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270349865] [2023-04-01 12:38:27,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270349865] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:27,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:27,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 12:38:27,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982695226] [2023-04-01 12:38:27,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:27,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:38:27,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:27,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:38:27,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:38:27,662 INFO L87 Difference]: Start difference. First operand 2180 states and 3041 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 12:38:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:29,086 INFO L93 Difference]: Finished difference Result 5390 states and 7611 transitions. [2023-04-01 12:38:29,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:38:29,087 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 12:38:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:29,107 INFO L225 Difference]: With dead ends: 5390 [2023-04-01 12:38:29,107 INFO L226 Difference]: Without dead ends: 4956 [2023-04-01 12:38:29,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2023-04-01 12:38:29,111 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 522 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:29,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 1448 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:38:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4956 states. [2023-04-01 12:38:29,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4956 to 2730. [2023-04-01 12:38:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2730 states, 2726 states have (on average 1.4057226705796038) internal successors, (3832), 2726 states have internal predecessors, (3832), 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 12:38:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 3835 transitions. [2023-04-01 12:38:29,565 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 3835 transitions. Word has length 50 [2023-04-01 12:38:29,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:29,566 INFO L495 AbstractCegarLoop]: Abstraction has 2730 states and 3835 transitions. [2023-04-01 12:38:29,566 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 12:38:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 3835 transitions. [2023-04-01 12:38:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 12:38:29,567 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:29,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:29,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:38:29,567 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:29,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:29,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1128398136, now seen corresponding path program 1 times [2023-04-01 12:38:29,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:29,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361127339] [2023-04-01 12:38:29,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:29,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:29,973 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 12:38:29,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:29,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361127339] [2023-04-01 12:38:29,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361127339] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:29,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:29,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 12:38:29,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892823903] [2023-04-01 12:38:29,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:29,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:38:29,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:29,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:38:29,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:38:29,975 INFO L87 Difference]: Start difference. First operand 2730 states and 3835 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 12:38:31,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:31,042 INFO L93 Difference]: Finished difference Result 5959 states and 8401 transitions. [2023-04-01 12:38:31,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 12:38:31,043 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 12:38:31,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:31,065 INFO L225 Difference]: With dead ends: 5959 [2023-04-01 12:38:31,065 INFO L226 Difference]: Without dead ends: 5813 [2023-04-01 12:38:31,067 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 12:38:31,068 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 496 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:31,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 1059 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:38:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5813 states. [2023-04-01 12:38:31,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5813 to 2733. [2023-04-01 12:38:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2733 states, 2729 states have (on average 1.4052766581165261) internal successors, (3835), 2729 states have internal predecessors, (3835), 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 12:38:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 3838 transitions. [2023-04-01 12:38:31,584 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 3838 transitions. Word has length 50 [2023-04-01 12:38:31,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:31,585 INFO L495 AbstractCegarLoop]: Abstraction has 2733 states and 3838 transitions. [2023-04-01 12:38:31,585 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 12:38:31,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 3838 transitions. [2023-04-01 12:38:31,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 12:38:31,586 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:31,586 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 12:38:31,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:38:31,586 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:31,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:31,586 INFO L85 PathProgramCache]: Analyzing trace with hash 832293439, now seen corresponding path program 1 times [2023-04-01 12:38:31,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:31,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108758872] [2023-04-01 12:38:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:31,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:31,629 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 12:38:31,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:31,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108758872] [2023-04-01 12:38:31,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108758872] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:31,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:31,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:31,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076442678] [2023-04-01 12:38:31,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:31,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:31,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:31,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:31,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:31,631 INFO L87 Difference]: Start difference. First operand 2733 states and 3838 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 12:38:32,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:32,086 INFO L93 Difference]: Finished difference Result 4543 states and 6416 transitions. [2023-04-01 12:38:32,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:32,087 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 12:38:32,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:32,115 INFO L225 Difference]: With dead ends: 4543 [2023-04-01 12:38:32,116 INFO L226 Difference]: Without dead ends: 2423 [2023-04-01 12:38:32,120 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 12:38:32,121 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 82 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 269 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 12:38:32,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 269 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:32,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2023-04-01 12:38:32,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2318. [2023-04-01 12:38:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2314 states have (on average 1.401037165082109) internal successors, (3242), 2314 states have internal predecessors, (3242), 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 12:38:32,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 3245 transitions. [2023-04-01 12:38:32,497 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 3245 transitions. Word has length 51 [2023-04-01 12:38:32,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:32,497 INFO L495 AbstractCegarLoop]: Abstraction has 2318 states and 3245 transitions. [2023-04-01 12:38:32,497 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 12:38:32,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 3245 transitions. [2023-04-01 12:38:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 12:38:32,498 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:32,498 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 12:38:32,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:38:32,498 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:32,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:32,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1234679581, now seen corresponding path program 1 times [2023-04-01 12:38:32,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:32,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762429839] [2023-04-01 12:38:32,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:32,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:35,923 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 12:38:35,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:35,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762429839] [2023-04-01 12:38:35,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762429839] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:35,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:35,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-04-01 12:38:35,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795516408] [2023-04-01 12:38:35,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:35,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-01 12:38:35,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:35,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-01 12:38:35,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2023-04-01 12:38:35,926 INFO L87 Difference]: Start difference. First operand 2318 states and 3245 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 12:38:41,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:41,163 INFO L93 Difference]: Finished difference Result 4592 states and 6458 transitions. [2023-04-01 12:38:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 12:38:41,164 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 12:38:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:41,173 INFO L225 Difference]: With dead ends: 4592 [2023-04-01 12:38:41,173 INFO L226 Difference]: Without dead ends: 3255 [2023-04-01 12:38:41,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=667, Invalid=1985, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 12:38:41,178 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 869 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 2025 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:41,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 1053 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2025 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 12:38:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2023-04-01 12:38:41,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2281. [2023-04-01 12:38:41,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2277 states have (on average 1.4044795783926218) internal successors, (3198), 2277 states have internal predecessors, (3198), 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 12:38:41,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 3201 transitions. [2023-04-01 12:38:41,567 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 3201 transitions. Word has length 52 [2023-04-01 12:38:41,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:41,567 INFO L495 AbstractCegarLoop]: Abstraction has 2281 states and 3201 transitions. [2023-04-01 12:38:41,568 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 12:38:41,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 3201 transitions. [2023-04-01 12:38:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 12:38:41,569 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:41,569 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] [2023-04-01 12:38:41,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 12:38:41,569 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:41,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:41,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1168894577, now seen corresponding path program 1 times [2023-04-01 12:38:41,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:41,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597237033] [2023-04-01 12:38:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:41,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:41,667 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 12:38:41,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:41,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597237033] [2023-04-01 12:38:41,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597237033] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:41,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:41,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:41,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626814613] [2023-04-01 12:38:41,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:41,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:41,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:41,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:41,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:41,669 INFO L87 Difference]: Start difference. First operand 2281 states and 3201 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 12:38:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:42,330 INFO L93 Difference]: Finished difference Result 4868 states and 6877 transitions. [2023-04-01 12:38:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:42,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 56 [2023-04-01 12:38:42,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:42,337 INFO L225 Difference]: With dead ends: 4868 [2023-04-01 12:38:42,337 INFO L226 Difference]: Without dead ends: 3008 [2023-04-01 12:38:42,340 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 12:38:42,342 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 81 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 290 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 12:38:42,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 290 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:42,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2023-04-01 12:38:42,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2744. [2023-04-01 12:38:42,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2740 states have (on average 1.3927007299270073) internal successors, (3816), 2740 states have internal predecessors, (3816), 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 12:38:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 3819 transitions. [2023-04-01 12:38:42,959 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 3819 transitions. Word has length 56 [2023-04-01 12:38:42,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:42,959 INFO L495 AbstractCegarLoop]: Abstraction has 2744 states and 3819 transitions. [2023-04-01 12:38:42,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 12:38:42,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 3819 transitions. [2023-04-01 12:38:42,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 12:38:42,960 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:42,960 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] [2023-04-01 12:38:42,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:38:42,961 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:42,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:42,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1116894018, now seen corresponding path program 1 times [2023-04-01 12:38:42,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:42,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336777882] [2023-04-01 12:38:42,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:42,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:43,011 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 12:38:43,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:43,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336777882] [2023-04-01 12:38:43,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336777882] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:43,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:43,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:43,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540253545] [2023-04-01 12:38:43,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:43,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:43,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:43,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:43,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:43,013 INFO L87 Difference]: Start difference. First operand 2744 states and 3819 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 12:38:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:43,575 INFO L93 Difference]: Finished difference Result 5201 states and 7278 transitions. [2023-04-01 12:38:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:43,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 59 [2023-04-01 12:38:43,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:43,582 INFO L225 Difference]: With dead ends: 5201 [2023-04-01 12:38:43,582 INFO L226 Difference]: Without dead ends: 2993 [2023-04-01 12:38:43,586 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 12:38:43,586 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 70 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:43,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 296 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:43,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2023-04-01 12:38:44,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2991. [2023-04-01 12:38:44,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2987 states have (on average 1.3829929695346501) internal successors, (4131), 2987 states have internal predecessors, (4131), 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 12:38:44,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 4134 transitions. [2023-04-01 12:38:44,118 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 4134 transitions. Word has length 59 [2023-04-01 12:38:44,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:44,119 INFO L495 AbstractCegarLoop]: Abstraction has 2991 states and 4134 transitions. [2023-04-01 12:38:44,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 12:38:44,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 4134 transitions. [2023-04-01 12:38:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 12:38:44,120 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:44,120 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] [2023-04-01 12:38:44,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 12:38:44,120 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:44,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:44,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1652284414, now seen corresponding path program 1 times [2023-04-01 12:38:44,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:44,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274128918] [2023-04-01 12:38:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:44,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:44,206 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 12:38:44,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:44,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274128918] [2023-04-01 12:38:44,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274128918] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:44,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:44,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:44,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361112122] [2023-04-01 12:38:44,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:44,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:44,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:44,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:44,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:44,208 INFO L87 Difference]: Start difference. First operand 2991 states and 4134 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 12:38:44,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:44,963 INFO L93 Difference]: Finished difference Result 7169 states and 10002 transitions. [2023-04-01 12:38:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:44,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 59 [2023-04-01 12:38:44,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:44,972 INFO L225 Difference]: With dead ends: 7169 [2023-04-01 12:38:44,972 INFO L226 Difference]: Without dead ends: 4464 [2023-04-01 12:38:44,977 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 12:38:44,977 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 77 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:44,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 273 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4464 states. [2023-04-01 12:38:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4464 to 3875. [2023-04-01 12:38:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3871 states have (on average 1.3688969258589512) internal successors, (5299), 3871 states have internal predecessors, (5299), 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 12:38:45,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 5302 transitions. [2023-04-01 12:38:45,641 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 5302 transitions. Word has length 59 [2023-04-01 12:38:45,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:45,641 INFO L495 AbstractCegarLoop]: Abstraction has 3875 states and 5302 transitions. [2023-04-01 12:38:45,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 12:38:45,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 5302 transitions. [2023-04-01 12:38:45,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 12:38:45,642 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:45,642 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] [2023-04-01 12:38:45,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 12:38:45,643 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:45,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:45,643 INFO L85 PathProgramCache]: Analyzing trace with hash 552666359, now seen corresponding path program 1 times [2023-04-01 12:38:45,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:45,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724930525] [2023-04-01 12:38:45,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:45,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:45,743 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 12:38:45,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:45,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724930525] [2023-04-01 12:38:45,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724930525] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:45,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:45,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:45,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996310317] [2023-04-01 12:38:45,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:45,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:45,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:45,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:45,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:45,747 INFO L87 Difference]: Start difference. First operand 3875 states and 5302 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 12:38:46,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:46,868 INFO L93 Difference]: Finished difference Result 9277 states and 12778 transitions. [2023-04-01 12:38:46,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:46,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 62 [2023-04-01 12:38:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:46,880 INFO L225 Difference]: With dead ends: 9277 [2023-04-01 12:38:46,881 INFO L226 Difference]: Without dead ends: 5322 [2023-04-01 12:38:46,888 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 12:38:46,889 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 72 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 254 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 12:38:46,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 254 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5322 states. [2023-04-01 12:38:47,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5322 to 4785. [2023-04-01 12:38:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4785 states, 4781 states have (on average 1.3589207278811963) internal successors, (6497), 4781 states have internal predecessors, (6497), 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 12:38:47,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4785 states to 4785 states and 6500 transitions. [2023-04-01 12:38:47,865 INFO L78 Accepts]: Start accepts. Automaton has 4785 states and 6500 transitions. Word has length 62 [2023-04-01 12:38:47,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:47,866 INFO L495 AbstractCegarLoop]: Abstraction has 4785 states and 6500 transitions. [2023-04-01 12:38:47,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 12:38:47,867 INFO L276 IsEmpty]: Start isEmpty. Operand 4785 states and 6500 transitions. [2023-04-01 12:38:47,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 12:38:47,867 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:47,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:47,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 12:38:47,868 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:47,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:47,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1850143044, now seen corresponding path program 1 times [2023-04-01 12:38:47,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:47,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414438439] [2023-04-01 12:38:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:47,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:48,140 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 12:38:48,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:48,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414438439] [2023-04-01 12:38:48,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414438439] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:48,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:48,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:38:48,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268397943] [2023-04-01 12:38:48,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:48,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:38:48,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:48,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:38:48,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:38:48,143 INFO L87 Difference]: Start difference. First operand 4785 states and 6500 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 12:38:49,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:49,832 INFO L93 Difference]: Finished difference Result 6982 states and 9423 transitions. [2023-04-01 12:38:49,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 12:38:49,833 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 67 [2023-04-01 12:38:49,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:49,849 INFO L225 Difference]: With dead ends: 6982 [2023-04-01 12:38:49,849 INFO L226 Difference]: Without dead ends: 6980 [2023-04-01 12:38:49,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:38:49,852 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 314 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:49,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 738 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6980 states. [2023-04-01 12:38:51,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6980 to 5939. [2023-04-01 12:38:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5935 states have (on average 1.3580454928390902) internal successors, (8060), 5935 states have internal predecessors, (8060), 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 12:38:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 8063 transitions. [2023-04-01 12:38:51,123 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 8063 transitions. Word has length 67 [2023-04-01 12:38:51,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:51,123 INFO L495 AbstractCegarLoop]: Abstraction has 5939 states and 8063 transitions. [2023-04-01 12:38:51,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 12:38:51,124 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 8063 transitions. [2023-04-01 12:38:51,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 12:38:51,126 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:51,126 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:51,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 12:38:51,126 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:51,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:51,127 INFO L85 PathProgramCache]: Analyzing trace with hash 378789448, now seen corresponding path program 1 times [2023-04-01 12:38:51,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:51,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176195365] [2023-04-01 12:38:51,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:51,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 12:38:51,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:51,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176195365] [2023-04-01 12:38:51,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176195365] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:51,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:51,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:38:51,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216328696] [2023-04-01 12:38:51,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:51,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:38:51,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:51,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:38:51,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:38:51,317 INFO L87 Difference]: Start difference. First operand 5939 states and 8063 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) [2023-04-01 12:38:53,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:53,390 INFO L93 Difference]: Finished difference Result 14198 states and 19311 transitions. [2023-04-01 12:38:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 12:38:53,391 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 75 [2023-04-01 12:38:53,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:53,402 INFO L225 Difference]: With dead ends: 14198 [2023-04-01 12:38:53,402 INFO L226 Difference]: Without dead ends: 8818 [2023-04-01 12:38:53,414 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 12:38:53,414 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 728 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:53,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 281 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:38:53,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8818 states. [2023-04-01 12:38:54,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8818 to 6451. [2023-04-01 12:38:54,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6451 states, 6447 states have (on average 1.3434155421126106) internal successors, (8661), 6447 states have internal predecessors, (8661), 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 12:38:54,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6451 states to 6451 states and 8664 transitions. [2023-04-01 12:38:54,908 INFO L78 Accepts]: Start accepts. Automaton has 6451 states and 8664 transitions. Word has length 75 [2023-04-01 12:38:54,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:54,909 INFO L495 AbstractCegarLoop]: Abstraction has 6451 states and 8664 transitions. [2023-04-01 12:38:54,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-04-01 12:38:54,909 INFO L276 IsEmpty]: Start isEmpty. Operand 6451 states and 8664 transitions. [2023-04-01 12:38:54,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 12:38:54,912 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:54,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:54,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 12:38:54,912 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:54,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:54,912 INFO L85 PathProgramCache]: Analyzing trace with hash -586662483, now seen corresponding path program 1 times [2023-04-01 12:38:54,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:54,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512339419] [2023-04-01 12:38:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:54,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:55,997 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 12:38:55,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:55,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512339419] [2023-04-01 12:38:55,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512339419] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:38:55,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774011569] [2023-04-01 12:38:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:55,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:38:55,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:38:56,001 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 12:38:56,005 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 12:38:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:56,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-01 12:38:56,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:38:57,873 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 12:38:57,873 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:38:57,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774011569] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:57,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:38:57,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [19] total 35 [2023-04-01 12:38:57,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535679729] [2023-04-01 12:38:57,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:57,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 12:38:57,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:57,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 12:38:57,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 12:38:57,875 INFO L87 Difference]: Start difference. First operand 6451 states and 8664 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 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 12:39:00,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:39:00,934 INFO L93 Difference]: Finished difference Result 8653 states and 11676 transitions. [2023-04-01 12:39:00,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 12:39:00,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 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 75 [2023-04-01 12:39:00,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:39:00,942 INFO L225 Difference]: With dead ends: 8653 [2023-04-01 12:39:00,942 INFO L226 Difference]: Without dead ends: 7149 [2023-04-01 12:39:00,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 12:39:00,945 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 554 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 12:39:00,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 747 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 12:39:00,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7149 states. [2023-04-01 12:39:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7149 to 7057. [2023-04-01 12:39:02,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7057 states, 7053 states have (on average 1.3399971643272366) internal successors, (9451), 7053 states have internal predecessors, (9451), 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 12:39:02,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7057 states to 7057 states and 9454 transitions. [2023-04-01 12:39:02,608 INFO L78 Accepts]: Start accepts. Automaton has 7057 states and 9454 transitions. Word has length 75 [2023-04-01 12:39:02,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:39:02,608 INFO L495 AbstractCegarLoop]: Abstraction has 7057 states and 9454 transitions. [2023-04-01 12:39:02,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 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 12:39:02,609 INFO L276 IsEmpty]: Start isEmpty. Operand 7057 states and 9454 transitions. [2023-04-01 12:39:02,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 12:39:02,611 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:39:02,611 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:39:02,620 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 12:39:02,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:39:02,819 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:39:02,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:39:02,819 INFO L85 PathProgramCache]: Analyzing trace with hash -653032211, now seen corresponding path program 1 times [2023-04-01 12:39:02,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:39:02,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388577805] [2023-04-01 12:39:02,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:39:02,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:39:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat