/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:36:59,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:36:59,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:36:59,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-03 02:36:59,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:36:59,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:36:59,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:36:59,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:36:59,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:36:59,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:36:59,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:36:59,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:36:59,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:36:59,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:36:59,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:36:59,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:36:59,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-03 02:36:59,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:36:59,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:36:59,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:36:59,148 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 [2023-04-03 02:36:59,165 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:36:59,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:36:59,166 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:36:59,166 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:36:59,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:36:59,166 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:36:59,167 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:36:59,167 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:36:59,167 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:36:59,167 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:36:59,167 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:36:59,167 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:36:59,167 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:36:59,167 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:36:59,168 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:36:59,168 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:36:59,168 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:36:59,168 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:36:59,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:36:59,168 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:36:59,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:36:59,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:36:59,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:36:59,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:36:59,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:36:59,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:36:59,169 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:36:59,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:36:59,169 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:36:59,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:36:59,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:36:59,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:36:59,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:36:59,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:36:59,170 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:36:59,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:36:59,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:36:59,171 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:36:59,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:36:59,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:36:59,171 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:36:59,171 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:36:59,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:36:59,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:36:59,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:36:59,402 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:36:59,404 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:36:59,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2023-04-03 02:37:00,543 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:37:00,780 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:37:00,781 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2023-04-03 02:37:00,800 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3023e627/aca98402d72c4c3696389e695ffc7b45/FLAGf9ace72de [2023-04-03 02:37:00,816 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3023e627/aca98402d72c4c3696389e695ffc7b45 [2023-04-03 02:37:00,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:37:00,820 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:37:00,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:37:00,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:37:00,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:37:00,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:37:00" (1/1) ... [2023-04-03 02:37:00,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d71966f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:37:00, skipping insertion in model container [2023-04-03 02:37:00,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:37:00" (1/1) ... [2023-04-03 02:37:00,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:37:00,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:37:01,216 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.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[12887,12900] [2023-04-03 02:37:01,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:37:01,369 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:37:01,437 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.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[12887,12900] [2023-04-03 02:37:01,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:37:01,506 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:37:01,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:37:01 WrapperNode [2023-04-03 02:37:01,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:37:01,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:37:01,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:37:01,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:37:01,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:37:01" (1/1) ... [2023-04-03 02:37:01,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:37:01" (1/1) ... [2023-04-03 02:37:01,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:37:01" (1/1) ... [2023-04-03 02:37:01,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:37:01" (1/1) ... [2023-04-03 02:37:01,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:37:01" (1/1) ... [2023-04-03 02:37:01,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:37:01" (1/1) ... [2023-04-03 02:37:01,609 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:37:01" (1/1) ... [2023-04-03 02:37:01,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:37:01" (1/1) ... [2023-04-03 02:37:01,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:37:01,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:37:01,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:37:01,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:37:01,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:37:01" (1/1) ... [2023-04-03 02:37:01,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:37:01,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:37:01,657 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) [2023-04-03 02:37:01,667 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 [2023-04-03 02:37:01,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:37:01,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:37:01,691 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:37:01,691 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:37:01,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:37:01,691 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:37:01,691 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:37:01,692 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:37:01,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:37:01,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:37:01,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:37:01,692 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:37:01,692 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:37:01,692 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:37:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:37:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:37:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:37:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:37:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:37:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:37:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:37:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:37:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:37:01,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:37:01,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:37:01,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:37:01,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:37:01,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:37:01,830 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:37:01,832 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:37:02,906 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:37:03,313 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:37:03,314 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:37:03,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:37:03 BoogieIcfgContainer [2023-04-03 02:37:03,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:37:03,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:37:03,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:37:03,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:37:03,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:37:00" (1/3) ... [2023-04-03 02:37:03,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4bd2ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:37:03, skipping insertion in model container [2023-04-03 02:37:03,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:37:01" (2/3) ... [2023-04-03 02:37:03,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4bd2ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:37:03, skipping insertion in model container [2023-04-03 02:37:03,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:37:03" (3/3) ... [2023-04-03 02:37:03,328 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2023-04-03 02:37:03,346 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:37:03,347 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:37:03,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:37:03,423 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;@1876cb39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:37:03,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:37:03,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 330 states, 302 states have (on average 1.5827814569536425) internal successors, (478), 325 states have internal predecessors, (478), 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) [2023-04-03 02:37:03,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 02:37:03,443 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:03,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:03,444 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:03,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:03,449 INFO L85 PathProgramCache]: Analyzing trace with hash 966151745, now seen corresponding path program 1 times [2023-04-03 02:37:03,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:03,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485523493] [2023-04-03 02:37:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:03,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:04,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:04,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485523493] [2023-04-03 02:37:04,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485523493] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:04,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:04,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 02:37:04,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918909499] [2023-04-03 02:37:04,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:04,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:37:04,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:04,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:37:04,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 02:37:04,168 INFO L87 Difference]: Start difference. First operand has 330 states, 302 states have (on average 1.5827814569536425) internal successors, (478), 325 states have internal predecessors, (478), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:37:04,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:04,444 INFO L93 Difference]: Finished difference Result 613 states and 915 transitions. [2023-04-03 02:37:04,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:37:04,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-03 02:37:04,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:04,455 INFO L225 Difference]: With dead ends: 613 [2023-04-03 02:37:04,455 INFO L226 Difference]: Without dead ends: 304 [2023-04-03 02:37:04,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:37:04,462 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 88 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:04,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 1235 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:37:04,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-04-03 02:37:04,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2023-04-03 02:37:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 300 states have (on average 1.47) internal successors, (441), 300 states have internal predecessors, (441), 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) [2023-04-03 02:37:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 444 transitions. [2023-04-03 02:37:04,516 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 444 transitions. Word has length 60 [2023-04-03 02:37:04,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:04,517 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 444 transitions. [2023-04-03 02:37:04,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:37:04,517 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 444 transitions. [2023-04-03 02:37:04,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-03 02:37:04,520 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:04,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:04,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:37:04,521 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:04,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:04,522 INFO L85 PathProgramCache]: Analyzing trace with hash 487408862, now seen corresponding path program 1 times [2023-04-03 02:37:04,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:04,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174314302] [2023-04-03 02:37:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:04,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:04,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:04,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174314302] [2023-04-03 02:37:04,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174314302] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:04,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:04,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:37:04,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697969830] [2023-04-03 02:37:04,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:04,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:37:04,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:04,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:37:04,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:37:04,692 INFO L87 Difference]: Start difference. First operand 304 states and 444 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2023-04-03 02:37:04,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:04,850 INFO L93 Difference]: Finished difference Result 737 states and 1097 transitions. [2023-04-03 02:37:04,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:37:04,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 83 [2023-04-03 02:37:04,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:04,859 INFO L225 Difference]: With dead ends: 737 [2023-04-03 02:37:04,863 INFO L226 Difference]: Without dead ends: 477 [2023-04-03 02:37:04,870 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 [2023-04-03 02:37:04,872 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 340 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:04,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 717 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:37:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-04-03 02:37:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 475. [2023-04-03 02:37:04,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 471 states have (on average 1.4777070063694266) internal successors, (696), 471 states have internal predecessors, (696), 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) [2023-04-03 02:37:04,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 699 transitions. [2023-04-03 02:37:04,938 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 699 transitions. Word has length 83 [2023-04-03 02:37:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:04,938 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 699 transitions. [2023-04-03 02:37:04,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2023-04-03 02:37:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 699 transitions. [2023-04-03 02:37:04,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-03 02:37:04,945 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:04,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:04,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:37:04,946 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:04,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:04,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1397559375, now seen corresponding path program 1 times [2023-04-03 02:37:04,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:04,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553090667] [2023-04-03 02:37:04,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:04,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:05,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:05,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553090667] [2023-04-03 02:37:05,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553090667] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:05,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:05,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:37:05,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406691308] [2023-04-03 02:37:05,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:05,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:37:05,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:05,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:37:05,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:37:05,095 INFO L87 Difference]: Start difference. First operand 475 states and 699 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2023-04-03 02:37:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:05,230 INFO L93 Difference]: Finished difference Result 1178 states and 1753 transitions. [2023-04-03 02:37:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:37:05,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 92 [2023-04-03 02:37:05,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:05,234 INFO L225 Difference]: With dead ends: 1178 [2023-04-03 02:37:05,235 INFO L226 Difference]: Without dead ends: 760 [2023-04-03 02:37:05,239 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 [2023-04-03 02:37:05,242 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 334 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:05,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 702 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:37:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2023-04-03 02:37:05,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 758. [2023-04-03 02:37:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 754 states have (on average 1.476127320954907) internal successors, (1113), 754 states have internal predecessors, (1113), 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) [2023-04-03 02:37:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1116 transitions. [2023-04-03 02:37:05,341 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1116 transitions. Word has length 92 [2023-04-03 02:37:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:05,343 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 1116 transitions. [2023-04-03 02:37:05,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2023-04-03 02:37:05,343 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1116 transitions. [2023-04-03 02:37:05,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-03 02:37:05,346 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:05,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:05,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:37:05,347 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:05,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:05,348 INFO L85 PathProgramCache]: Analyzing trace with hash 997189616, now seen corresponding path program 1 times [2023-04-03 02:37:05,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:05,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955033740] [2023-04-03 02:37:05,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:05,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:05,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:05,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955033740] [2023-04-03 02:37:05,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955033740] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:05,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:05,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:37:05,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346730354] [2023-04-03 02:37:05,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:05,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:37:05,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:05,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:37:05,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:37:05,493 INFO L87 Difference]: Start difference. First operand 758 states and 1116 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2023-04-03 02:37:05,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:05,675 INFO L93 Difference]: Finished difference Result 1896 states and 2804 transitions. [2023-04-03 02:37:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:37:05,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 101 [2023-04-03 02:37:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:05,682 INFO L225 Difference]: With dead ends: 1896 [2023-04-03 02:37:05,683 INFO L226 Difference]: Without dead ends: 1208 [2023-04-03 02:37:05,684 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 [2023-04-03 02:37:05,692 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 327 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:05,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 769 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:37:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2023-04-03 02:37:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1206. [2023-04-03 02:37:05,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1202 states have (on average 1.464226289517471) internal successors, (1760), 1202 states have internal predecessors, (1760), 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) [2023-04-03 02:37:05,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1763 transitions. [2023-04-03 02:37:05,802 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1763 transitions. Word has length 101 [2023-04-03 02:37:05,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:05,802 INFO L495 AbstractCegarLoop]: Abstraction has 1206 states and 1763 transitions. [2023-04-03 02:37:05,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2023-04-03 02:37:05,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1763 transitions. [2023-04-03 02:37:05,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-03 02:37:05,810 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:05,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:05,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:37:05,810 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:05,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:05,811 INFO L85 PathProgramCache]: Analyzing trace with hash -955271691, now seen corresponding path program 1 times [2023-04-03 02:37:05,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:05,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897137368] [2023-04-03 02:37:05,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:05,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:05,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:05,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897137368] [2023-04-03 02:37:05,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897137368] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:05,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:05,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:37:05,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428854680] [2023-04-03 02:37:05,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:05,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:37:05,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:05,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:37:05,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:37:05,917 INFO L87 Difference]: Start difference. First operand 1206 states and 1763 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2023-04-03 02:37:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:06,218 INFO L93 Difference]: Finished difference Result 2991 states and 4363 transitions. [2023-04-03 02:37:06,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:37:06,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 110 [2023-04-03 02:37:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:06,227 INFO L225 Difference]: With dead ends: 2991 [2023-04-03 02:37:06,227 INFO L226 Difference]: Without dead ends: 1868 [2023-04-03 02:37:06,230 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 [2023-04-03 02:37:06,230 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 321 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:06,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 735 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:37:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2023-04-03 02:37:06,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1866. [2023-04-03 02:37:06,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1862 states have (on average 1.4387755102040816) internal successors, (2679), 1862 states have internal predecessors, (2679), 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) [2023-04-03 02:37:06,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 2682 transitions. [2023-04-03 02:37:06,411 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 2682 transitions. Word has length 110 [2023-04-03 02:37:06,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:06,412 INFO L495 AbstractCegarLoop]: Abstraction has 1866 states and 2682 transitions. [2023-04-03 02:37:06,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2023-04-03 02:37:06,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 2682 transitions. [2023-04-03 02:37:06,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-03 02:37:06,417 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:06,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:06,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:37:06,418 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:06,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:06,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1202537237, now seen corresponding path program 1 times [2023-04-03 02:37:06,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:06,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958157945] [2023-04-03 02:37:06,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:06,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:06,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:06,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958157945] [2023-04-03 02:37:06,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958157945] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:06,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:06,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 02:37:06,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685311802] [2023-04-03 02:37:06,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:06,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:37:06,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:06,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:37:06,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:37:06,752 INFO L87 Difference]: Start difference. First operand 1866 states and 2682 transitions. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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) [2023-04-03 02:37:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:08,100 INFO L93 Difference]: Finished difference Result 7789 states and 11108 transitions. [2023-04-03 02:37:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:37:08,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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 119 [2023-04-03 02:37:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:08,123 INFO L225 Difference]: With dead ends: 7789 [2023-04-03 02:37:08,123 INFO L226 Difference]: Without dead ends: 6000 [2023-04-03 02:37:08,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:37:08,131 INFO L413 NwaCegarLoop]: 772 mSDtfsCounter, 1582 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:08,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1582 Valid, 1862 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:37:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6000 states. [2023-04-03 02:37:09,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6000 to 5994. [2023-04-03 02:37:09,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5994 states, 5990 states have (on average 1.4165275459098496) internal successors, (8485), 5990 states have internal predecessors, (8485), 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) [2023-04-03 02:37:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5994 states to 5994 states and 8488 transitions. [2023-04-03 02:37:09,125 INFO L78 Accepts]: Start accepts. Automaton has 5994 states and 8488 transitions. Word has length 119 [2023-04-03 02:37:09,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:09,125 INFO L495 AbstractCegarLoop]: Abstraction has 5994 states and 8488 transitions. [2023-04-03 02:37:09,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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) [2023-04-03 02:37:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 5994 states and 8488 transitions. [2023-04-03 02:37:09,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-03 02:37:09,139 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:09,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:09,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:37:09,139 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:09,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:09,140 INFO L85 PathProgramCache]: Analyzing trace with hash 38867522, now seen corresponding path program 1 times [2023-04-03 02:37:09,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:09,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910328539] [2023-04-03 02:37:09,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:09,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:09,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:09,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910328539] [2023-04-03 02:37:09,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910328539] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:09,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:09,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:37:09,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998846283] [2023-04-03 02:37:09,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:09,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:37:09,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:09,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:37:09,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:37:09,240 INFO L87 Difference]: Start difference. First operand 5994 states and 8488 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2023-04-03 02:37:10,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:10,761 INFO L93 Difference]: Finished difference Result 14134 states and 19965 transitions. [2023-04-03 02:37:10,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:37:10,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 121 [2023-04-03 02:37:10,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:10,802 INFO L225 Difference]: With dead ends: 14134 [2023-04-03 02:37:10,802 INFO L226 Difference]: Without dead ends: 9908 [2023-04-03 02:37:10,813 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 [2023-04-03 02:37:10,813 INFO L413 NwaCegarLoop]: 634 mSDtfsCounter, 324 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:10,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1010 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:37:10,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9908 states. [2023-04-03 02:37:12,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9908 to 9906. [2023-04-03 02:37:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9906 states, 9902 states have (on average 1.3982023833568975) internal successors, (13845), 9902 states have internal predecessors, (13845), 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) [2023-04-03 02:37:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9906 states to 9906 states and 13848 transitions. [2023-04-03 02:37:12,225 INFO L78 Accepts]: Start accepts. Automaton has 9906 states and 13848 transitions. Word has length 121 [2023-04-03 02:37:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:12,225 INFO L495 AbstractCegarLoop]: Abstraction has 9906 states and 13848 transitions. [2023-04-03 02:37:12,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2023-04-03 02:37:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 9906 states and 13848 transitions. [2023-04-03 02:37:12,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-03 02:37:12,249 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:12,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:12,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:37:12,249 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:12,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:12,250 INFO L85 PathProgramCache]: Analyzing trace with hash 539372884, now seen corresponding path program 1 times [2023-04-03 02:37:12,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:12,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73363592] [2023-04-03 02:37:12,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:12,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:12,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:12,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73363592] [2023-04-03 02:37:12,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73363592] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:12,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:12,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:37:12,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52486511] [2023-04-03 02:37:12,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:12,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:37:12,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:12,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:37:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:37:12,391 INFO L87 Difference]: Start difference. First operand 9906 states and 13848 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2023-04-03 02:37:14,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:14,155 INFO L93 Difference]: Finished difference Result 20034 states and 27890 transitions. [2023-04-03 02:37:14,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:37:14,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 123 [2023-04-03 02:37:14,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:14,198 INFO L225 Difference]: With dead ends: 20034 [2023-04-03 02:37:14,199 INFO L226 Difference]: Without dead ends: 14828 [2023-04-03 02:37:14,212 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 [2023-04-03 02:37:14,213 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 284 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:14,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1045 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:37:14,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14828 states. [2023-04-03 02:37:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14828 to 14826. [2023-04-03 02:37:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14826 states, 14822 states have (on average 1.378019160707057) internal successors, (20425), 14822 states have internal predecessors, (20425), 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) [2023-04-03 02:37:16,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14826 states to 14826 states and 20428 transitions. [2023-04-03 02:37:16,025 INFO L78 Accepts]: Start accepts. Automaton has 14826 states and 20428 transitions. Word has length 123 [2023-04-03 02:37:16,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:16,026 INFO L495 AbstractCegarLoop]: Abstraction has 14826 states and 20428 transitions. [2023-04-03 02:37:16,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2023-04-03 02:37:16,026 INFO L276 IsEmpty]: Start isEmpty. Operand 14826 states and 20428 transitions. [2023-04-03 02:37:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-03 02:37:16,067 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:16,067 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:16,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:37:16,068 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:16,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:16,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1723799312, now seen corresponding path program 1 times [2023-04-03 02:37:16,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:16,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310445598] [2023-04-03 02:37:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:16,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:16,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:16,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310445598] [2023-04-03 02:37:16,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310445598] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:16,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:16,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:37:16,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747090796] [2023-04-03 02:37:16,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:16,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:37:16,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:16,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:37:16,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:37:16,183 INFO L87 Difference]: Start difference. First operand 14826 states and 20428 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2023-04-03 02:37:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:18,371 INFO L93 Difference]: Finished difference Result 24160 states and 33016 transitions. [2023-04-03 02:37:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:37:18,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 123 [2023-04-03 02:37:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:18,416 INFO L225 Difference]: With dead ends: 24160 [2023-04-03 02:37:18,417 INFO L226 Difference]: Without dead ends: 19406 [2023-04-03 02:37:18,432 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 [2023-04-03 02:37:18,433 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 250 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:18,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1036 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:37:18,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19406 states. [2023-04-03 02:37:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19406 to 19404. [2023-04-03 02:37:20,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19404 states, 19400 states have (on average 1.3543814432989691) internal successors, (26275), 19400 states have internal predecessors, (26275), 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) [2023-04-03 02:37:20,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19404 states to 19404 states and 26278 transitions. [2023-04-03 02:37:20,624 INFO L78 Accepts]: Start accepts. Automaton has 19404 states and 26278 transitions. Word has length 123 [2023-04-03 02:37:20,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:20,625 INFO L495 AbstractCegarLoop]: Abstraction has 19404 states and 26278 transitions. [2023-04-03 02:37:20,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2023-04-03 02:37:20,625 INFO L276 IsEmpty]: Start isEmpty. Operand 19404 states and 26278 transitions. [2023-04-03 02:37:20,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-03 02:37:20,679 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:20,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:20,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:37:20,680 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:20,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:20,680 INFO L85 PathProgramCache]: Analyzing trace with hash -138349574, now seen corresponding path program 1 times [2023-04-03 02:37:20,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:20,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953027762] [2023-04-03 02:37:20,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:20,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:20,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:20,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953027762] [2023-04-03 02:37:20,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953027762] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:20,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:20,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:37:20,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659870893] [2023-04-03 02:37:20,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:20,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:37:20,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:20,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:37:20,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:37:20,844 INFO L87 Difference]: Start difference. First operand 19404 states and 26278 transitions. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 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) [2023-04-03 02:37:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:24,585 INFO L93 Difference]: Finished difference Result 48071 states and 65352 transitions. [2023-04-03 02:37:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:37:24,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 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 125 [2023-04-03 02:37:24,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:24,656 INFO L225 Difference]: With dead ends: 48071 [2023-04-03 02:37:24,657 INFO L226 Difference]: Without dead ends: 28706 [2023-04-03 02:37:24,702 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 [2023-04-03 02:37:24,703 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 1253 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1253 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:24,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1253 Valid, 531 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:37:24,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28706 states. [2023-04-03 02:37:28,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28706 to 28704. [2023-04-03 02:37:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28704 states, 28700 states have (on average 1.3497560975609757) internal successors, (38738), 28700 states have internal predecessors, (38738), 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) [2023-04-03 02:37:28,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28704 states to 28704 states and 38741 transitions. [2023-04-03 02:37:28,293 INFO L78 Accepts]: Start accepts. Automaton has 28704 states and 38741 transitions. Word has length 125 [2023-04-03 02:37:28,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:28,293 INFO L495 AbstractCegarLoop]: Abstraction has 28704 states and 38741 transitions. [2023-04-03 02:37:28,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 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) [2023-04-03 02:37:28,293 INFO L276 IsEmpty]: Start isEmpty. Operand 28704 states and 38741 transitions. [2023-04-03 02:37:28,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-03 02:37:28,351 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:28,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:28,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:37:28,352 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:28,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:28,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1379819664, now seen corresponding path program 1 times [2023-04-03 02:37:28,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:28,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386403942] [2023-04-03 02:37:28,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:28,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:28,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:28,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386403942] [2023-04-03 02:37:28,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386403942] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:28,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:28,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:37:28,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903808831] [2023-04-03 02:37:28,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:28,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:37:28,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:28,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:37:28,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:37:28,565 INFO L87 Difference]: Start difference. First operand 28704 states and 38741 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2023-04-03 02:37:30,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:30,522 INFO L93 Difference]: Finished difference Result 38944 states and 52631 transitions. [2023-04-03 02:37:30,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:37:30,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 125 [2023-04-03 02:37:30,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:30,559 INFO L225 Difference]: With dead ends: 38944 [2023-04-03 02:37:30,559 INFO L226 Difference]: Without dead ends: 15044 [2023-04-03 02:37:30,607 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 [2023-04-03 02:37:30,607 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 171 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:30,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 636 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:37:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15044 states. [2023-04-03 02:37:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15044 to 12674. [2023-04-03 02:37:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12674 states, 12670 states have (on average 1.3372533543804261) internal successors, (16943), 12670 states have internal predecessors, (16943), 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) [2023-04-03 02:37:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12674 states to 12674 states and 16946 transitions. [2023-04-03 02:37:32,312 INFO L78 Accepts]: Start accepts. Automaton has 12674 states and 16946 transitions. Word has length 125 [2023-04-03 02:37:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:32,312 INFO L495 AbstractCegarLoop]: Abstraction has 12674 states and 16946 transitions. [2023-04-03 02:37:32,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2023-04-03 02:37:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 12674 states and 16946 transitions. [2023-04-03 02:37:32,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-03 02:37:32,329 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:32,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:32,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:37:32,329 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:32,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:32,330 INFO L85 PathProgramCache]: Analyzing trace with hash -159242029, now seen corresponding path program 1 times [2023-04-03 02:37:32,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:32,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657171151] [2023-04-03 02:37:32,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:32,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:32,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:32,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657171151] [2023-04-03 02:37:32,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657171151] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:32,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:32,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:37:32,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840016766] [2023-04-03 02:37:32,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:32,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:37:32,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:32,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:37:32,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:37:32,489 INFO L87 Difference]: Start difference. First operand 12674 states and 16946 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2023-04-03 02:37:33,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:33,549 INFO L93 Difference]: Finished difference Result 17674 states and 23656 transitions. [2023-04-03 02:37:33,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:37:33,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 125 [2023-04-03 02:37:33,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:33,561 INFO L225 Difference]: With dead ends: 17674 [2023-04-03 02:37:33,561 INFO L226 Difference]: Without dead ends: 6454 [2023-04-03 02:37:33,575 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 [2023-04-03 02:37:33,575 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 121 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:33,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 601 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:37:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2023-04-03 02:37:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 6452. [2023-04-03 02:37:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6452 states, 6448 states have (on average 1.3146712158808933) internal successors, (8477), 6448 states have internal predecessors, (8477), 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) [2023-04-03 02:37:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6452 states to 6452 states and 8480 transitions. [2023-04-03 02:37:34,318 INFO L78 Accepts]: Start accepts. Automaton has 6452 states and 8480 transitions. Word has length 125 [2023-04-03 02:37:34,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:34,319 INFO L495 AbstractCegarLoop]: Abstraction has 6452 states and 8480 transitions. [2023-04-03 02:37:34,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2023-04-03 02:37:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 6452 states and 8480 transitions. [2023-04-03 02:37:34,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-03 02:37:34,327 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:34,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:34,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:37:34,327 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:34,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:34,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1218080069, now seen corresponding path program 1 times [2023-04-03 02:37:34,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:34,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491622168] [2023-04-03 02:37:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:34,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:34,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:34,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491622168] [2023-04-03 02:37:34,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491622168] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:34,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:34,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 02:37:34,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764285467] [2023-04-03 02:37:34,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:34,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:37:34,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:34,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:37:34,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:37:34,635 INFO L87 Difference]: Start difference. First operand 6452 states and 8480 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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) [2023-04-03 02:37:36,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:36,711 INFO L93 Difference]: Finished difference Result 18734 states and 24378 transitions. [2023-04-03 02:37:36,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:37:36,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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 125 [2023-04-03 02:37:36,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:36,736 INFO L225 Difference]: With dead ends: 18734 [2023-04-03 02:37:36,737 INFO L226 Difference]: Without dead ends: 12472 [2023-04-03 02:37:36,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:37:36,754 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 869 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:36,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 533 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:37:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12472 states. [2023-04-03 02:37:38,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12472 to 10192. [2023-04-03 02:37:38,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10192 states, 10188 states have (on average 1.2799371809972517) internal successors, (13040), 10188 states have internal predecessors, (13040), 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) [2023-04-03 02:37:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10192 states to 10192 states and 13043 transitions. [2023-04-03 02:37:38,201 INFO L78 Accepts]: Start accepts. Automaton has 10192 states and 13043 transitions. Word has length 125 [2023-04-03 02:37:38,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:38,201 INFO L495 AbstractCegarLoop]: Abstraction has 10192 states and 13043 transitions. [2023-04-03 02:37:38,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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) [2023-04-03 02:37:38,201 INFO L276 IsEmpty]: Start isEmpty. Operand 10192 states and 13043 transitions. [2023-04-03 02:37:38,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-03 02:37:38,216 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:38,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:38,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:37:38,216 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:38,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:38,217 INFO L85 PathProgramCache]: Analyzing trace with hash -252200746, now seen corresponding path program 1 times [2023-04-03 02:37:38,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:38,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707654901] [2023-04-03 02:37:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:38,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:38,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:38,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707654901] [2023-04-03 02:37:38,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707654901] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:38,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:38,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:37:38,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478017170] [2023-04-03 02:37:38,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:38,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:37:38,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:38,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:37:38,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:37:38,533 INFO L87 Difference]: Start difference. First operand 10192 states and 13043 transitions. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 6 states have internal predecessors, (122), 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) [2023-04-03 02:37:41,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:41,608 INFO L93 Difference]: Finished difference Result 25010 states and 31969 transitions. [2023-04-03 02:37:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-03 02:37:41,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 6 states have internal predecessors, (122), 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 125 [2023-04-03 02:37:41,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:41,631 INFO L225 Difference]: With dead ends: 25010 [2023-04-03 02:37:41,631 INFO L226 Difference]: Without dead ends: 17952 [2023-04-03 02:37:41,641 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 [2023-04-03 02:37:41,642 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 2227 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2227 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:41,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2227 Valid, 639 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:37:41,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17952 states. [2023-04-03 02:37:43,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17952 to 14412. [2023-04-03 02:37:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14412 states, 14408 states have (on average 1.2779705719044976) internal successors, (18413), 14408 states have internal predecessors, (18413), 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) [2023-04-03 02:37:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14412 states to 14412 states and 18416 transitions. [2023-04-03 02:37:43,720 INFO L78 Accepts]: Start accepts. Automaton has 14412 states and 18416 transitions. Word has length 125 [2023-04-03 02:37:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:43,720 INFO L495 AbstractCegarLoop]: Abstraction has 14412 states and 18416 transitions. [2023-04-03 02:37:43,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 6 states have internal predecessors, (122), 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) [2023-04-03 02:37:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 14412 states and 18416 transitions. [2023-04-03 02:37:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-03 02:37:43,741 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:43,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:43,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:37:43,741 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:43,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:43,742 INFO L85 PathProgramCache]: Analyzing trace with hash -986806602, now seen corresponding path program 1 times [2023-04-03 02:37:43,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:43,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165866458] [2023-04-03 02:37:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:43,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:44,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:44,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165866458] [2023-04-03 02:37:44,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165866458] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:44,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:44,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-03 02:37:44,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264609034] [2023-04-03 02:37:44,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:44,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-03 02:37:44,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:44,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-03 02:37:44,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-04-03 02:37:44,737 INFO L87 Difference]: Start difference. First operand 14412 states and 18416 transitions. Second operand has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 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) [2023-04-03 02:37:48,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:48,490 INFO L93 Difference]: Finished difference Result 20142 states and 25836 transitions. [2023-04-03 02:37:48,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-03 02:37:48,491 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 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 125 [2023-04-03 02:37:48,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:48,519 INFO L225 Difference]: With dead ends: 20142 [2023-04-03 02:37:48,519 INFO L226 Difference]: Without dead ends: 20140 [2023-04-03 02:37:48,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:37:48,526 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 627 mSDsluCounter, 1814 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 2183 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:48,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 2183 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:37:48,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20140 states. [2023-04-03 02:37:51,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20140 to 18088. [2023-04-03 02:37:51,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18088 states, 18084 states have (on average 1.2825149303251493) internal successors, (23193), 18084 states have internal predecessors, (23193), 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) [2023-04-03 02:37:51,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18088 states to 18088 states and 23196 transitions. [2023-04-03 02:37:51,612 INFO L78 Accepts]: Start accepts. Automaton has 18088 states and 23196 transitions. Word has length 125 [2023-04-03 02:37:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:51,612 INFO L495 AbstractCegarLoop]: Abstraction has 18088 states and 23196 transitions. [2023-04-03 02:37:51,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 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) [2023-04-03 02:37:51,612 INFO L276 IsEmpty]: Start isEmpty. Operand 18088 states and 23196 transitions. [2023-04-03 02:37:51,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-03 02:37:51,626 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:51,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:51,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:37:51,627 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:51,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:51,627 INFO L85 PathProgramCache]: Analyzing trace with hash 616650535, now seen corresponding path program 1 times [2023-04-03 02:37:51,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:51,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81373459] [2023-04-03 02:37:51,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:51,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:51,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:51,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81373459] [2023-04-03 02:37:51,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81373459] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:51,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:51,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:37:51,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372097285] [2023-04-03 02:37:51,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:51,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:37:51,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:51,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:37:51,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:37:51,761 INFO L87 Difference]: Start difference. First operand 18088 states and 23196 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2023-04-03 02:37:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:53,174 INFO L93 Difference]: Finished difference Result 23497 states and 30160 transitions. [2023-04-03 02:37:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:37:53,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 125 [2023-04-03 02:37:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:53,189 INFO L225 Difference]: With dead ends: 23497 [2023-04-03 02:37:53,189 INFO L226 Difference]: Without dead ends: 7468 [2023-04-03 02:37:53,210 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 [2023-04-03 02:37:53,211 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 75 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:53,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 573 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:37:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7468 states. [2023-04-03 02:37:54,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7468 to 7466. [2023-04-03 02:37:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7466 states, 7462 states have (on average 1.2668185473063522) internal successors, (9453), 7462 states have internal predecessors, (9453), 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) [2023-04-03 02:37:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7466 states to 7466 states and 9456 transitions. [2023-04-03 02:37:54,530 INFO L78 Accepts]: Start accepts. Automaton has 7466 states and 9456 transitions. Word has length 125 [2023-04-03 02:37:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:54,530 INFO L495 AbstractCegarLoop]: Abstraction has 7466 states and 9456 transitions. [2023-04-03 02:37:54,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2023-04-03 02:37:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand 7466 states and 9456 transitions. [2023-04-03 02:37:54,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-03 02:37:54,536 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:54,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:54,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:37:54,536 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:54,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:54,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1184099958, now seen corresponding path program 1 times [2023-04-03 02:37:54,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:54,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897523793] [2023-04-03 02:37:54,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:54,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:54,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:54,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897523793] [2023-04-03 02:37:54,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897523793] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:54,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:54,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:37:54,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896643143] [2023-04-03 02:37:54,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:54,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:37:54,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:54,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:37:54,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:37:54,670 INFO L87 Difference]: Start difference. First operand 7466 states and 9456 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2023-04-03 02:37:55,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:55,468 INFO L93 Difference]: Finished difference Result 10545 states and 13366 transitions. [2023-04-03 02:37:55,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:37:55,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 125 [2023-04-03 02:37:55,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:55,479 INFO L225 Difference]: With dead ends: 10545 [2023-04-03 02:37:55,480 INFO L226 Difference]: Without dead ends: 4095 [2023-04-03 02:37:55,490 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 [2023-04-03 02:37:55,491 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 63 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:55,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 472 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:37:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4095 states. [2023-04-03 02:37:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4095 to 4093. [2023-04-03 02:37:56,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4089 states have (on average 1.2408901932012717) internal successors, (5074), 4089 states have internal predecessors, (5074), 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) [2023-04-03 02:37:56,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 5077 transitions. [2023-04-03 02:37:56,341 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 5077 transitions. Word has length 125 [2023-04-03 02:37:56,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:56,342 INFO L495 AbstractCegarLoop]: Abstraction has 4093 states and 5077 transitions. [2023-04-03 02:37:56,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2023-04-03 02:37:56,342 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 5077 transitions. [2023-04-03 02:37:56,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-03 02:37:56,346 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:56,346 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:56,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:37:56,346 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:56,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:56,347 INFO L85 PathProgramCache]: Analyzing trace with hash 104808352, now seen corresponding path program 1 times [2023-04-03 02:37:56,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:56,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11271017] [2023-04-03 02:37:56,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:56,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 02:37:57,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:57,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11271017] [2023-04-03 02:37:57,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11271017] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:57,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:57,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-03 02:37:57,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665712726] [2023-04-03 02:37:57,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:57,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-03 02:37:57,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:57,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-03 02:37:57,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:37:57,872 INFO L87 Difference]: Start difference. First operand 4093 states and 5077 transitions. Second operand has 16 states, 16 states have (on average 8.125) internal successors, (130), 15 states have internal predecessors, (130), 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) [2023-04-03 02:38:03,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:03,387 INFO L93 Difference]: Finished difference Result 9375 states and 11598 transitions. [2023-04-03 02:38:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-03 02:38:03,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.125) internal successors, (130), 15 states have internal predecessors, (130), 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 136 [2023-04-03 02:38:03,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:03,396 INFO L225 Difference]: With dead ends: 9375 [2023-04-03 02:38:03,396 INFO L226 Difference]: Without dead ends: 7730 [2023-04-03 02:38:03,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=731, Invalid=1719, Unknown=0, NotChecked=0, Total=2450 [2023-04-03 02:38:03,401 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 3349 mSDsluCounter, 1570 mSDsCounter, 0 mSdLazyCounter, 2139 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3349 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:03,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3349 Valid, 1847 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2139 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-03 02:38:03,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7730 states. [2023-04-03 02:38:04,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7730 to 4872. [2023-04-03 02:38:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4872 states, 4868 states have (on average 1.2366474938373049) internal successors, (6020), 4868 states have internal predecessors, (6020), 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) [2023-04-03 02:38:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4872 states to 4872 states and 6023 transitions. [2023-04-03 02:38:04,557 INFO L78 Accepts]: Start accepts. Automaton has 4872 states and 6023 transitions. Word has length 136 [2023-04-03 02:38:04,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:04,558 INFO L495 AbstractCegarLoop]: Abstraction has 4872 states and 6023 transitions. [2023-04-03 02:38:04,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.125) internal successors, (130), 15 states have internal predecessors, (130), 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) [2023-04-03 02:38:04,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4872 states and 6023 transitions. [2023-04-03 02:38:04,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-03 02:38:04,561 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:04,561 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:04,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:38:04,562 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:04,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:04,562 INFO L85 PathProgramCache]: Analyzing trace with hash -912958455, now seen corresponding path program 1 times [2023-04-03 02:38:04,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:04,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621546864] [2023-04-03 02:38:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:04,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:38:04,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:04,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621546864] [2023-04-03 02:38:04,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621546864] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:04,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:04,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:38:04,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541612078] [2023-04-03 02:38:04,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:04,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:38:04,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:04,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:38:04,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:38:04,722 INFO L87 Difference]: Start difference. First operand 4872 states and 6023 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 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) [2023-04-03 02:38:06,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:06,471 INFO L93 Difference]: Finished difference Result 10784 states and 13327 transitions. [2023-04-03 02:38:06,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:38:06,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 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 136 [2023-04-03 02:38:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:06,477 INFO L225 Difference]: With dead ends: 10784 [2023-04-03 02:38:06,477 INFO L226 Difference]: Without dead ends: 5973 [2023-04-03 02:38:06,481 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 [2023-04-03 02:38:06,481 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 836 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:06,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 257 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:38:06,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5973 states. [2023-04-03 02:38:07,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5973 to 4872. [2023-04-03 02:38:07,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4872 states, 4868 states have (on average 1.2358258011503698) internal successors, (6016), 4868 states have internal predecessors, (6016), 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) [2023-04-03 02:38:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4872 states to 4872 states and 6019 transitions. [2023-04-03 02:38:07,611 INFO L78 Accepts]: Start accepts. Automaton has 4872 states and 6019 transitions. Word has length 136 [2023-04-03 02:38:07,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:07,611 INFO L495 AbstractCegarLoop]: Abstraction has 4872 states and 6019 transitions. [2023-04-03 02:38:07,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 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) [2023-04-03 02:38:07,611 INFO L276 IsEmpty]: Start isEmpty. Operand 4872 states and 6019 transitions. [2023-04-03 02:38:07,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-03 02:38:07,615 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:07,615 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:07,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 02:38:07,615 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:07,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:07,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1496938756, now seen corresponding path program 1 times [2023-04-03 02:38:07,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:07,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722993957] [2023-04-03 02:38:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:07,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:38:07,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:07,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722993957] [2023-04-03 02:38:07,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722993957] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:07,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:07,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:38:07,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412540677] [2023-04-03 02:38:07,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:07,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:38:07,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:07,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:38:07,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:38:07,963 INFO L87 Difference]: Start difference. First operand 4872 states and 6019 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 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) [2023-04-03 02:38:10,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:10,901 INFO L93 Difference]: Finished difference Result 14630 states and 18203 transitions. [2023-04-03 02:38:10,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-03 02:38:10,901 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 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 136 [2023-04-03 02:38:10,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:10,915 INFO L225 Difference]: With dead ends: 14630 [2023-04-03 02:38:10,915 INFO L226 Difference]: Without dead ends: 9797 [2023-04-03 02:38:10,921 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 [2023-04-03 02:38:10,921 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1804 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1804 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:10,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1804 Valid, 500 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:38:10,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9797 states. [2023-04-03 02:38:12,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9797 to 6912. [2023-04-03 02:38:12,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6912 states, 6908 states have (on average 1.223364215402432) internal successors, (8451), 6908 states have internal predecessors, (8451), 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) [2023-04-03 02:38:12,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6912 states to 6912 states and 8454 transitions. [2023-04-03 02:38:12,621 INFO L78 Accepts]: Start accepts. Automaton has 6912 states and 8454 transitions. Word has length 136 [2023-04-03 02:38:12,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:12,621 INFO L495 AbstractCegarLoop]: Abstraction has 6912 states and 8454 transitions. [2023-04-03 02:38:12,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 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) [2023-04-03 02:38:12,621 INFO L276 IsEmpty]: Start isEmpty. Operand 6912 states and 8454 transitions. [2023-04-03 02:38:12,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-03 02:38:12,627 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:12,627 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:12,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-03 02:38:12,628 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:12,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:12,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1406557924, now seen corresponding path program 1 times [2023-04-03 02:38:12,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:12,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109235868] [2023-04-03 02:38:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:12,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:15,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:15,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109235868] [2023-04-03 02:38:15,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109235868] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:38:15,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277657325] [2023-04-03 02:38:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:15,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:38:15,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:38:15,773 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) [2023-04-03 02:38:15,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:38:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:16,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-03 02:38:16,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:38:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 02:38:18,969 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:38:18,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277657325] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:18,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:38:18,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [27] total 48 [2023-04-03 02:38:18,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799763562] [2023-04-03 02:38:18,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:18,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-03 02:38:18,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-03 02:38:18,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2023-04-03 02:38:18,974 INFO L87 Difference]: Start difference. First operand 6912 states and 8454 transitions. Second operand has 23 states, 23 states have (on average 5.695652173913044) internal successors, (131), 22 states have internal predecessors, (131), 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) [2023-04-03 02:38:23,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:23,876 INFO L93 Difference]: Finished difference Result 14138 states and 17309 transitions. [2023-04-03 02:38:23,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-03 02:38:23,877 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.695652173913044) internal successors, (131), 22 states have internal predecessors, (131), 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 136 [2023-04-03 02:38:23,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:23,886 INFO L225 Difference]: With dead ends: 14138 [2023-04-03 02:38:23,886 INFO L226 Difference]: Without dead ends: 8065 [2023-04-03 02:38:23,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=806, Invalid=4894, Unknown=0, NotChecked=0, Total=5700 [2023-04-03 02:38:23,894 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 2930 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 2232 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2930 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:23,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2930 Valid, 1755 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2232 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-03 02:38:23,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2023-04-03 02:38:25,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7436. [2023-04-03 02:38:25,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7436 states, 7432 states have (on average 1.2147470398277718) internal successors, (9028), 7432 states have internal predecessors, (9028), 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) [2023-04-03 02:38:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7436 states to 7436 states and 9031 transitions. [2023-04-03 02:38:25,888 INFO L78 Accepts]: Start accepts. Automaton has 7436 states and 9031 transitions. Word has length 136 [2023-04-03 02:38:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:25,888 INFO L495 AbstractCegarLoop]: Abstraction has 7436 states and 9031 transitions. [2023-04-03 02:38:25,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.695652173913044) internal successors, (131), 22 states have internal predecessors, (131), 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) [2023-04-03 02:38:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 7436 states and 9031 transitions. [2023-04-03 02:38:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-03 02:38:25,893 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:25,894 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:25,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-03 02:38:26,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-04-03 02:38:26,095 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:26,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:26,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2064891803, now seen corresponding path program 1 times [2023-04-03 02:38:26,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:26,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914928235] [2023-04-03 02:38:26,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:26,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:38:26,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:26,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914928235] [2023-04-03 02:38:26,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914928235] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:26,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:26,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:38:26,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152846542] [2023-04-03 02:38:26,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:26,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:38:26,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:26,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:38:26,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:38:26,230 INFO L87 Difference]: Start difference. First operand 7436 states and 9031 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 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) [2023-04-03 02:38:28,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:28,867 INFO L93 Difference]: Finished difference Result 15621 states and 18899 transitions. [2023-04-03 02:38:28,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:38:28,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 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 136 [2023-04-03 02:38:28,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:28,877 INFO L225 Difference]: With dead ends: 15621 [2023-04-03 02:38:28,877 INFO L226 Difference]: Without dead ends: 8315 [2023-04-03 02:38:28,883 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 [2023-04-03 02:38:28,884 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 683 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:28,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 260 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:38:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8315 states. [2023-04-03 02:38:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8315 to 7436. [2023-04-03 02:38:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7436 states, 7432 states have (on average 1.2129978471474705) internal successors, (9015), 7432 states have internal predecessors, (9015), 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) [2023-04-03 02:38:30,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7436 states to 7436 states and 9018 transitions. [2023-04-03 02:38:30,936 INFO L78 Accepts]: Start accepts. Automaton has 7436 states and 9018 transitions. Word has length 136 [2023-04-03 02:38:30,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:30,936 INFO L495 AbstractCegarLoop]: Abstraction has 7436 states and 9018 transitions. [2023-04-03 02:38:30,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 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) [2023-04-03 02:38:30,936 INFO L276 IsEmpty]: Start isEmpty. Operand 7436 states and 9018 transitions. [2023-04-03 02:38:30,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-03 02:38:30,941 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:30,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:30,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-03 02:38:30,941 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:30,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:30,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1422537152, now seen corresponding path program 1 times [2023-04-03 02:38:30,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:30,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766537387] [2023-04-03 02:38:30,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:30,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:38:31,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:31,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766537387] [2023-04-03 02:38:31,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766537387] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:31,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:31,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:38:31,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610965102] [2023-04-03 02:38:31,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:31,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:38:31,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:31,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:38:31,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:38:31,199 INFO L87 Difference]: Start difference. First operand 7436 states and 9018 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 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) [2023-04-03 02:38:35,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:35,140 INFO L93 Difference]: Finished difference Result 18309 states and 22350 transitions. [2023-04-03 02:38:35,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-03 02:38:35,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 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 136 [2023-04-03 02:38:35,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:35,154 INFO L225 Difference]: With dead ends: 18309 [2023-04-03 02:38:35,154 INFO L226 Difference]: Without dead ends: 12083 [2023-04-03 02:38:35,162 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 [2023-04-03 02:38:35,163 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 1653 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:35,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1653 Valid, 474 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:38:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12083 states. [2023-04-03 02:38:38,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12083 to 10118. [2023-04-03 02:38:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10118 states, 10114 states have (on average 1.2032825786039154) internal successors, (12170), 10114 states have internal predecessors, (12170), 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) [2023-04-03 02:38:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10118 states to 10118 states and 12173 transitions. [2023-04-03 02:38:38,092 INFO L78 Accepts]: Start accepts. Automaton has 10118 states and 12173 transitions. Word has length 136 [2023-04-03 02:38:38,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:38,092 INFO L495 AbstractCegarLoop]: Abstraction has 10118 states and 12173 transitions. [2023-04-03 02:38:38,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 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) [2023-04-03 02:38:38,092 INFO L276 IsEmpty]: Start isEmpty. Operand 10118 states and 12173 transitions. [2023-04-03 02:38:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-03 02:38:38,100 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:38,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:38,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-03 02:38:38,100 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:38,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:38,100 INFO L85 PathProgramCache]: Analyzing trace with hash 124592096, now seen corresponding path program 1 times [2023-04-03 02:38:38,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:38,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249025422] [2023-04-03 02:38:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:38,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:40,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:40,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249025422] [2023-04-03 02:38:40,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249025422] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:38:40,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115583159] [2023-04-03 02:38:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:40,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:38:40,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:38:40,426 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:38:40,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 02:38:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:40,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-03 02:38:40,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:38:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:38:42,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:38:42,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115583159] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:42,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:38:42,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [27] total 44 [2023-04-03 02:38:42,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536675660] [2023-04-03 02:38:42,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:42,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:38:42,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:42,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:38:42,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1701, Unknown=0, NotChecked=0, Total=1892 [2023-04-03 02:38:42,580 INFO L87 Difference]: Start difference. First operand 10118 states and 12173 transitions. Second operand has 19 states, 19 states have (on average 6.947368421052632) internal successors, (132), 18 states have internal predecessors, (132), 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) [2023-04-03 02:38:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:49,145 INFO L93 Difference]: Finished difference Result 21416 states and 25754 transitions. [2023-04-03 02:38:49,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-03 02:38:49,145 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.947368421052632) internal successors, (132), 18 states have internal predecessors, (132), 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 136 [2023-04-03 02:38:49,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:49,161 INFO L225 Difference]: With dead ends: 21416 [2023-04-03 02:38:49,161 INFO L226 Difference]: Without dead ends: 13214 [2023-04-03 02:38:49,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=621, Invalid=3935, Unknown=0, NotChecked=0, Total=4556 [2023-04-03 02:38:49,173 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 1818 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1818 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 2600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:49,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1818 Valid, 2010 Invalid, 2600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-03 02:38:49,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13214 states. [2023-04-03 02:38:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13214 to 10967. [2023-04-03 02:38:52,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10967 states, 10963 states have (on average 1.1877223387758826) internal successors, (13021), 10963 states have internal predecessors, (13021), 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) [2023-04-03 02:38:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10967 states to 10967 states and 13024 transitions. [2023-04-03 02:38:52,601 INFO L78 Accepts]: Start accepts. Automaton has 10967 states and 13024 transitions. Word has length 136 [2023-04-03 02:38:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:52,602 INFO L495 AbstractCegarLoop]: Abstraction has 10967 states and 13024 transitions. [2023-04-03 02:38:52,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.947368421052632) internal successors, (132), 18 states have internal predecessors, (132), 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) [2023-04-03 02:38:52,602 INFO L276 IsEmpty]: Start isEmpty. Operand 10967 states and 13024 transitions. [2023-04-03 02:38:52,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-03 02:38:52,610 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:52,610 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:52,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-03 02:38:52,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-04-03 02:38:52,811 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:52,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:52,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1731553902, now seen corresponding path program 1 times [2023-04-03 02:38:52,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:52,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706918883] [2023-04-03 02:38:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:52,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:52,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:38:52,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:52,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706918883] [2023-04-03 02:38:52,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706918883] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:52,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:52,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:38:52,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638870918] [2023-04-03 02:38:52,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:52,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:38:52,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:52,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:38:52,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:38:52,925 INFO L87 Difference]: Start difference. First operand 10967 states and 13024 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 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) [2023-04-03 02:38:56,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:56,787 INFO L93 Difference]: Finished difference Result 18973 states and 22497 transitions. [2023-04-03 02:38:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:38:56,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 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 136 [2023-04-03 02:38:56,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:56,799 INFO L225 Difference]: With dead ends: 18973 [2023-04-03 02:38:56,799 INFO L226 Difference]: Without dead ends: 11385 [2023-04-03 02:38:56,807 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 [2023-04-03 02:38:56,808 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 556 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:56,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 257 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:38:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11385 states. [2023-04-03 02:39:00,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11385 to 10945. [2023-04-03 02:39:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10945 states, 10941 states have (on average 1.1860890229412302) internal successors, (12977), 10941 states have internal predecessors, (12977), 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) [2023-04-03 02:39:00,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10945 states to 10945 states and 12980 transitions. [2023-04-03 02:39:00,286 INFO L78 Accepts]: Start accepts. Automaton has 10945 states and 12980 transitions. Word has length 136 [2023-04-03 02:39:00,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:00,287 INFO L495 AbstractCegarLoop]: Abstraction has 10945 states and 12980 transitions. [2023-04-03 02:39:00,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 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) [2023-04-03 02:39:00,287 INFO L276 IsEmpty]: Start isEmpty. Operand 10945 states and 12980 transitions. [2023-04-03 02:39:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-03 02:39:00,296 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:00,296 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:00,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-03 02:39:00,297 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:00,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:00,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1655737047, now seen corresponding path program 1 times [2023-04-03 02:39:00,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:00,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641354310] [2023-04-03 02:39:00,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:00,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:39:00,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:00,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641354310] [2023-04-03 02:39:00,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641354310] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:00,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:39:00,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:39:00,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640918707] [2023-04-03 02:39:00,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:00,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:39:00,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:00,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:39:00,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:39:00,533 INFO L87 Difference]: Start difference. First operand 10945 states and 12980 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 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) [2023-04-03 02:39:05,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:39:05,804 INFO L93 Difference]: Finished difference Result 24634 states and 29332 transitions. [2023-04-03 02:39:05,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-03 02:39:05,805 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 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 136 [2023-04-03 02:39:05,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:39:05,820 INFO L225 Difference]: With dead ends: 24634 [2023-04-03 02:39:05,820 INFO L226 Difference]: Without dead ends: 14975 [2023-04-03 02:39:05,829 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 [2023-04-03 02:39:05,830 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 1444 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1444 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:39:05,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1444 Valid, 309 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:39:05,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14975 states. [2023-04-03 02:39:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14975 to 13929. [2023-04-03 02:39:10,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13929 states, 13925 states have (on average 1.1849910233393177) internal successors, (16501), 13925 states have internal predecessors, (16501), 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) [2023-04-03 02:39:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13929 states to 13929 states and 16504 transitions. [2023-04-03 02:39:10,252 INFO L78 Accepts]: Start accepts. Automaton has 13929 states and 16504 transitions. Word has length 136 [2023-04-03 02:39:10,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:10,253 INFO L495 AbstractCegarLoop]: Abstraction has 13929 states and 16504 transitions. [2023-04-03 02:39:10,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 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) [2023-04-03 02:39:10,253 INFO L276 IsEmpty]: Start isEmpty. Operand 13929 states and 16504 transitions. [2023-04-03 02:39:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-03 02:39:10,263 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:10,263 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:10,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-04-03 02:39:10,263 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:10,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:10,264 INFO L85 PathProgramCache]: Analyzing trace with hash 42966692, now seen corresponding path program 1 times [2023-04-03 02:39:10,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:10,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517758618] [2023-04-03 02:39:10,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:10,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:39:13,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:13,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517758618] [2023-04-03 02:39:13,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517758618] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:39:13,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031054753] [2023-04-03 02:39:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:13,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:39:13,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:39:13,419 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:39:13,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 02:39:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:13,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 59 conjunts are in the unsatisfiable core [2023-04-03 02:39:13,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:39:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:39:15,212 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:39:15,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031054753] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:15,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:39:15,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [36] total 51 [2023-04-03 02:39:15,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000324434] [2023-04-03 02:39:15,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:15,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:39:15,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:15,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:39:15,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2266, Unknown=0, NotChecked=0, Total=2550 [2023-04-03 02:39:15,214 INFO L87 Difference]: Start difference. First operand 13929 states and 16504 transitions. Second operand has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 16 states have internal predecessors, (127), 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) [2023-04-03 02:39:19,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:39:19,411 INFO L93 Difference]: Finished difference Result 22570 states and 26795 transitions. [2023-04-03 02:39:19,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:39:19,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 16 states have internal predecessors, (127), 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 136 [2023-04-03 02:39:19,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:39:19,425 INFO L225 Difference]: With dead ends: 22570 [2023-04-03 02:39:19,425 INFO L226 Difference]: Without dead ends: 11045 [2023-04-03 02:39:19,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=321, Invalid=2541, Unknown=0, NotChecked=0, Total=2862 [2023-04-03 02:39:19,437 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 446 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:39:19,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 801 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:39:19,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11045 states. [2023-04-03 02:39:23,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11045 to 11016. [2023-04-03 02:39:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11016 states, 11012 states have (on average 1.1839811115147112) internal successors, (13038), 11012 states have internal predecessors, (13038), 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) [2023-04-03 02:39:23,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11016 states to 11016 states and 13041 transitions. [2023-04-03 02:39:23,127 INFO L78 Accepts]: Start accepts. Automaton has 11016 states and 13041 transitions. Word has length 136 [2023-04-03 02:39:23,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:23,127 INFO L495 AbstractCegarLoop]: Abstraction has 11016 states and 13041 transitions. [2023-04-03 02:39:23,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 16 states have internal predecessors, (127), 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) [2023-04-03 02:39:23,127 INFO L276 IsEmpty]: Start isEmpty. Operand 11016 states and 13041 transitions. [2023-04-03 02:39:23,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-03 02:39:23,135 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:23,135 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:23,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-03 02:39:23,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:39:23,335 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:23,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:23,336 INFO L85 PathProgramCache]: Analyzing trace with hash 558468190, now seen corresponding path program 1 times [2023-04-03 02:39:23,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:23,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576417074] [2023-04-03 02:39:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:23,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:39:23,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:23,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576417074] [2023-04-03 02:39:23,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576417074] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:23,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:39:23,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:39:23,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947988909] [2023-04-03 02:39:23,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:23,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:39:23,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:23,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:39:23,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:39:23,396 INFO L87 Difference]: Start difference. First operand 11016 states and 13041 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2023-04-03 02:39:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:39:27,155 INFO L93 Difference]: Finished difference Result 18128 states and 21652 transitions. [2023-04-03 02:39:27,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:39:27,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 137 [2023-04-03 02:39:27,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:39:27,168 INFO L225 Difference]: With dead ends: 18128 [2023-04-03 02:39:27,168 INFO L226 Difference]: Without dead ends: 11204 [2023-04-03 02:39:27,174 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 [2023-04-03 02:39:27,174 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 190 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:39:27,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 271 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:39:27,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11204 states. [2023-04-03 02:39:30,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11204 to 9791. [2023-04-03 02:39:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9791 states, 9787 states have (on average 1.1748237457852253) internal successors, (11498), 9787 states have internal predecessors, (11498), 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) [2023-04-03 02:39:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9791 states to 9791 states and 11501 transitions. [2023-04-03 02:39:30,382 INFO L78 Accepts]: Start accepts. Automaton has 9791 states and 11501 transitions. Word has length 137 [2023-04-03 02:39:30,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:30,382 INFO L495 AbstractCegarLoop]: Abstraction has 9791 states and 11501 transitions. [2023-04-03 02:39:30,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2023-04-03 02:39:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 9791 states and 11501 transitions. [2023-04-03 02:39:30,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-03 02:39:30,388 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:30,389 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:30,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-04-03 02:39:30,389 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:30,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:30,389 INFO L85 PathProgramCache]: Analyzing trace with hash -164571116, now seen corresponding path program 1 times [2023-04-03 02:39:30,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:30,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857403579] [2023-04-03 02:39:30,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:30,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:39:30,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:30,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857403579] [2023-04-03 02:39:30,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857403579] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:30,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:39:30,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:39:30,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528736199] [2023-04-03 02:39:30,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:30,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:39:30,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:30,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:39:30,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:39:30,457 INFO L87 Difference]: Start difference. First operand 9791 states and 11501 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2023-04-03 02:39:33,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:39:33,402 INFO L93 Difference]: Finished difference Result 14361 states and 16980 transitions. [2023-04-03 02:39:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:39:33,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 137 [2023-04-03 02:39:33,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:39:33,412 INFO L225 Difference]: With dead ends: 14361 [2023-04-03 02:39:33,412 INFO L226 Difference]: Without dead ends: 8771 [2023-04-03 02:39:33,419 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 [2023-04-03 02:39:33,420 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 179 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:39:33,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 210 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:39:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8771 states. [2023-04-03 02:39:36,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8771 to 8460. [2023-04-03 02:39:36,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8460 states, 8456 states have (on average 1.1653263954588458) internal successors, (9854), 8456 states have internal predecessors, (9854), 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) [2023-04-03 02:39:36,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8460 states to 8460 states and 9857 transitions. [2023-04-03 02:39:36,155 INFO L78 Accepts]: Start accepts. Automaton has 8460 states and 9857 transitions. Word has length 137 [2023-04-03 02:39:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:36,155 INFO L495 AbstractCegarLoop]: Abstraction has 8460 states and 9857 transitions. [2023-04-03 02:39:36,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2023-04-03 02:39:36,155 INFO L276 IsEmpty]: Start isEmpty. Operand 8460 states and 9857 transitions. [2023-04-03 02:39:36,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-03 02:39:36,160 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:36,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:36,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-04-03 02:39:36,160 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:36,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:36,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1648955749, now seen corresponding path program 1 times [2023-04-03 02:39:36,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:36,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809791484] [2023-04-03 02:39:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:36,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:39:38,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:38,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809791484] [2023-04-03 02:39:38,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809791484] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:39:38,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789371292] [2023-04-03 02:39:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:38,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:39:38,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:39:38,346 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:39:38,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-03 02:39:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:38,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 52 conjunts are in the unsatisfiable core [2023-04-03 02:39:38,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:39:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 02:39:41,468 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:39:41,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789371292] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:41,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:39:41,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [27] total 46 [2023-04-03 02:39:41,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27176873] [2023-04-03 02:39:41,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:41,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:39:41,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:41,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:39:41,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2023-04-03 02:39:41,471 INFO L87 Difference]: Start difference. First operand 8460 states and 9857 transitions. Second operand has 21 states, 21 states have (on average 6.333333333333333) internal successors, (133), 20 states have internal predecessors, (133), 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) [2023-04-03 02:39:46,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:39:46,602 INFO L93 Difference]: Finished difference Result 10996 states and 12869 transitions. [2023-04-03 02:39:46,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-03 02:39:46,602 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.333333333333333) internal successors, (133), 20 states have internal predecessors, (133), 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 139 [2023-04-03 02:39:46,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:39:46,618 INFO L225 Difference]: With dead ends: 10996 [2023-04-03 02:39:46,618 INFO L226 Difference]: Without dead ends: 10156 [2023-04-03 02:39:46,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=345, Invalid=2847, Unknown=0, NotChecked=0, Total=3192 [2023-04-03 02:39:46,624 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 901 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 1571 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:39:46,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [901 Valid, 1571 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:39:46,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10156 states. [2023-04-03 02:39:49,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10156 to 8459. [2023-04-03 02:39:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8459 states, 8455 states have (on average 1.1649911295091662) internal successors, (9850), 8455 states have internal predecessors, (9850), 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) [2023-04-03 02:39:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8459 states to 8459 states and 9853 transitions. [2023-04-03 02:39:49,414 INFO L78 Accepts]: Start accepts. Automaton has 8459 states and 9853 transitions. Word has length 139 [2023-04-03 02:39:49,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:49,415 INFO L495 AbstractCegarLoop]: Abstraction has 8459 states and 9853 transitions. [2023-04-03 02:39:49,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.333333333333333) internal successors, (133), 20 states have internal predecessors, (133), 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) [2023-04-03 02:39:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 8459 states and 9853 transitions. [2023-04-03 02:39:49,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-03 02:39:49,420 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:49,420 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:49,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-03 02:39:49,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:39:49,621 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:49,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:49,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1616436078, now seen corresponding path program 1 times [2023-04-03 02:39:49,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:49,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997654442] [2023-04-03 02:39:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:49,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:39:49,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:49,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997654442] [2023-04-03 02:39:49,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997654442] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:49,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:39:49,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:39:49,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015866732] [2023-04-03 02:39:49,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:49,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:39:49,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:49,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:39:49,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:39:49,869 INFO L87 Difference]: Start difference. First operand 8459 states and 9853 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2023-04-03 02:39:53,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:39:53,342 INFO L93 Difference]: Finished difference Result 12297 states and 14380 transitions. [2023-04-03 02:39:53,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:39:53,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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 139 [2023-04-03 02:39:53,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:39:53,351 INFO L225 Difference]: With dead ends: 12297 [2023-04-03 02:39:53,351 INFO L226 Difference]: Without dead ends: 9271 [2023-04-03 02:39:53,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:39:53,356 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 607 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:39:53,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 519 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:39:53,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9271 states. [2023-04-03 02:39:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9271 to 7482. [2023-04-03 02:39:55,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7482 states, 7478 states have (on average 1.1584648301684943) internal successors, (8663), 7478 states have internal predecessors, (8663), 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) [2023-04-03 02:39:55,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7482 states to 7482 states and 8666 transitions. [2023-04-03 02:39:55,851 INFO L78 Accepts]: Start accepts. Automaton has 7482 states and 8666 transitions. Word has length 139 [2023-04-03 02:39:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:55,851 INFO L495 AbstractCegarLoop]: Abstraction has 7482 states and 8666 transitions. [2023-04-03 02:39:55,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2023-04-03 02:39:55,852 INFO L276 IsEmpty]: Start isEmpty. Operand 7482 states and 8666 transitions. [2023-04-03 02:39:55,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-03 02:39:55,857 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:55,857 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:55,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-04-03 02:39:55,857 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:55,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:55,857 INFO L85 PathProgramCache]: Analyzing trace with hash 246821457, now seen corresponding path program 1 times [2023-04-03 02:39:55,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:55,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729666445] [2023-04-03 02:39:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:55,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:39:56,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:56,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729666445] [2023-04-03 02:39:56,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729666445] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:56,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:39:56,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-03 02:39:56,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051329311] [2023-04-03 02:39:56,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:56,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:39:56,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:56,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:39:56,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:39:56,681 INFO L87 Difference]: Start difference. First operand 7482 states and 8666 transitions. Second operand has 12 states, 12 states have (on average 10.833333333333334) internal successors, (130), 11 states have internal predecessors, (130), 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) [2023-04-03 02:40:01,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:01,248 INFO L93 Difference]: Finished difference Result 10859 states and 12580 transitions. [2023-04-03 02:40:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-03 02:40:01,249 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.833333333333334) internal successors, (130), 11 states have internal predecessors, (130), 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 139 [2023-04-03 02:40:01,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:01,258 INFO L225 Difference]: With dead ends: 10859 [2023-04-03 02:40:01,258 INFO L226 Difference]: Without dead ends: 9164 [2023-04-03 02:40:01,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:40:01,261 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 1337 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1337 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:01,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1337 Valid, 1181 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:40:01,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9164 states. [2023-04-03 02:40:03,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9164 to 7292. [2023-04-03 02:40:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7292 states, 7288 states have (on average 1.1601262349066959) internal successors, (8455), 7288 states have internal predecessors, (8455), 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) [2023-04-03 02:40:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7292 states to 7292 states and 8458 transitions. [2023-04-03 02:40:03,889 INFO L78 Accepts]: Start accepts. Automaton has 7292 states and 8458 transitions. Word has length 139 [2023-04-03 02:40:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:03,889 INFO L495 AbstractCegarLoop]: Abstraction has 7292 states and 8458 transitions. [2023-04-03 02:40:03,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.833333333333334) internal successors, (130), 11 states have internal predecessors, (130), 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) [2023-04-03 02:40:03,889 INFO L276 IsEmpty]: Start isEmpty. Operand 7292 states and 8458 transitions. [2023-04-03 02:40:03,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-03 02:40:03,893 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:03,893 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:40:03,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-04-03 02:40:03,894 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:03,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:03,894 INFO L85 PathProgramCache]: Analyzing trace with hash 181021172, now seen corresponding path program 1 times [2023-04-03 02:40:03,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:03,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383681058] [2023-04-03 02:40:03,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:03,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 02:40:05,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:05,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383681058] [2023-04-03 02:40:05,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383681058] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:05,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:05,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:40:05,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959425874] [2023-04-03 02:40:05,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:05,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:40:05,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:05,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:40:05,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:40:05,325 INFO L87 Difference]: Start difference. First operand 7292 states and 8458 transitions. Second operand has 20 states, 20 states have (on average 6.65) internal successors, (133), 19 states have internal predecessors, (133), 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) [2023-04-03 02:40:10,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:10,704 INFO L93 Difference]: Finished difference Result 10233 states and 11904 transitions. [2023-04-03 02:40:10,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 02:40:10,705 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.65) internal successors, (133), 19 states have internal predecessors, (133), 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 139 [2023-04-03 02:40:10,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:10,714 INFO L225 Difference]: With dead ends: 10233 [2023-04-03 02:40:10,714 INFO L226 Difference]: Without dead ends: 8369 [2023-04-03 02:40:10,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=265, Invalid=1067, Unknown=0, NotChecked=0, Total=1332 [2023-04-03 02:40:10,717 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 1587 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 2156 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1587 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:10,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1587 Valid, 1861 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2156 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-03 02:40:10,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8369 states. [2023-04-03 02:40:13,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8369 to 7047. [2023-04-03 02:40:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 7043 states have (on average 1.1574613091012353) internal successors, (8152), 7043 states have internal predecessors, (8152), 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) [2023-04-03 02:40:13,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 8155 transitions. [2023-04-03 02:40:13,396 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 8155 transitions. Word has length 139 [2023-04-03 02:40:13,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:13,396 INFO L495 AbstractCegarLoop]: Abstraction has 7047 states and 8155 transitions. [2023-04-03 02:40:13,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.65) internal successors, (133), 19 states have internal predecessors, (133), 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) [2023-04-03 02:40:13,396 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 8155 transitions. [2023-04-03 02:40:13,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-03 02:40:13,401 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:13,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:40:13,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-04-03 02:40:13,401 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:13,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:13,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1803003115, now seen corresponding path program 1 times [2023-04-03 02:40:13,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:13,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240010942] [2023-04-03 02:40:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:13,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:40:13,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:13,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240010942] [2023-04-03 02:40:13,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240010942] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:13,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:13,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:40:13,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067959066] [2023-04-03 02:40:13,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:13,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:40:13,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:13,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:40:13,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:40:13,451 INFO L87 Difference]: Start difference. First operand 7047 states and 8155 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2023-04-03 02:40:16,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:16,474 INFO L93 Difference]: Finished difference Result 11702 states and 13699 transitions. [2023-04-03 02:40:16,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:40:16,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 140 [2023-04-03 02:40:16,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:16,483 INFO L225 Difference]: With dead ends: 11702 [2023-04-03 02:40:16,483 INFO L226 Difference]: Without dead ends: 7383 [2023-04-03 02:40:16,487 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 [2023-04-03 02:40:16,488 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 180 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:16,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 242 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:40:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7383 states. [2023-04-03 02:40:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7383 to 6825. [2023-04-03 02:40:19,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6825 states, 6821 states have (on average 1.1436739481014515) internal successors, (7801), 6821 states have internal predecessors, (7801), 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) [2023-04-03 02:40:19,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6825 states to 6825 states and 7804 transitions. [2023-04-03 02:40:19,097 INFO L78 Accepts]: Start accepts. Automaton has 6825 states and 7804 transitions. Word has length 140 [2023-04-03 02:40:19,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:19,097 INFO L495 AbstractCegarLoop]: Abstraction has 6825 states and 7804 transitions. [2023-04-03 02:40:19,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2023-04-03 02:40:19,098 INFO L276 IsEmpty]: Start isEmpty. Operand 6825 states and 7804 transitions. [2023-04-03 02:40:19,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-04-03 02:40:19,102 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:19,103 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:40:19,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-04-03 02:40:19,103 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:19,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:19,103 INFO L85 PathProgramCache]: Analyzing trace with hash -427071342, now seen corresponding path program 1 times [2023-04-03 02:40:19,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:19,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047175332] [2023-04-03 02:40:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:19,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:40:19,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:19,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047175332] [2023-04-03 02:40:19,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047175332] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:19,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:19,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:40:19,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581108268] [2023-04-03 02:40:19,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:19,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:40:19,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:19,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:40:19,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:40:19,362 INFO L87 Difference]: Start difference. First operand 6825 states and 7804 transitions. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 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) [2023-04-03 02:40:22,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:22,872 INFO L93 Difference]: Finished difference Result 12016 states and 13878 transitions. [2023-04-03 02:40:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:40:22,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 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 142 [2023-04-03 02:40:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:22,883 INFO L225 Difference]: With dead ends: 12016 [2023-04-03 02:40:22,883 INFO L226 Difference]: Without dead ends: 8133 [2023-04-03 02:40:22,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:40:22,889 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 1270 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1270 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:22,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1270 Valid, 356 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:40:22,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8133 states. [2023-04-03 02:40:25,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8133 to 5983. [2023-04-03 02:40:25,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5983 states, 5979 states have (on average 1.1312928583375146) internal successors, (6764), 5979 states have internal predecessors, (6764), 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) [2023-04-03 02:40:25,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5983 states to 5983 states and 6767 transitions. [2023-04-03 02:40:25,329 INFO L78 Accepts]: Start accepts. Automaton has 5983 states and 6767 transitions. Word has length 142 [2023-04-03 02:40:25,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:25,329 INFO L495 AbstractCegarLoop]: Abstraction has 5983 states and 6767 transitions. [2023-04-03 02:40:25,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 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) [2023-04-03 02:40:25,330 INFO L276 IsEmpty]: Start isEmpty. Operand 5983 states and 6767 transitions. [2023-04-03 02:40:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-04-03 02:40:25,333 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:25,334 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:40:25,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-04-03 02:40:25,334 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:25,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:25,334 INFO L85 PathProgramCache]: Analyzing trace with hash -73118798, now seen corresponding path program 1 times [2023-04-03 02:40:25,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:25,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928938549] [2023-04-03 02:40:25,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:25,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:40:25,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:25,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928938549] [2023-04-03 02:40:25,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928938549] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:25,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:25,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-03 02:40:25,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078073520] [2023-04-03 02:40:25,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:25,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:40:25,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:25,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:40:25,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:40:25,980 INFO L87 Difference]: Start difference. First operand 5983 states and 6767 transitions. Second operand has 12 states, 12 states have (on average 11.083333333333334) internal successors, (133), 11 states have internal predecessors, (133), 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) [2023-04-03 02:40:30,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:30,193 INFO L93 Difference]: Finished difference Result 7675 states and 8712 transitions. [2023-04-03 02:40:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-03 02:40:30,193 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 11.083333333333334) internal successors, (133), 11 states have internal predecessors, (133), 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 142 [2023-04-03 02:40:30,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:30,202 INFO L225 Difference]: With dead ends: 7675 [2023-04-03 02:40:30,202 INFO L226 Difference]: Without dead ends: 6824 [2023-04-03 02:40:30,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:40:30,204 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 1085 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:30,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1085 Valid, 1199 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:40:30,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6824 states. [2023-04-03 02:40:32,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6824 to 5643. [2023-04-03 02:40:32,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5643 states, 5639 states have (on average 1.1264408583082106) internal successors, (6352), 5639 states have internal predecessors, (6352), 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) [2023-04-03 02:40:32,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5643 states to 5643 states and 6355 transitions. [2023-04-03 02:40:32,623 INFO L78 Accepts]: Start accepts. Automaton has 5643 states and 6355 transitions. Word has length 142 [2023-04-03 02:40:32,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:32,624 INFO L495 AbstractCegarLoop]: Abstraction has 5643 states and 6355 transitions. [2023-04-03 02:40:32,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.083333333333334) internal successors, (133), 11 states have internal predecessors, (133), 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) [2023-04-03 02:40:32,624 INFO L276 IsEmpty]: Start isEmpty. Operand 5643 states and 6355 transitions. [2023-04-03 02:40:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-04-03 02:40:32,629 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:32,629 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:40:32,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-04-03 02:40:32,629 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:32,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:32,630 INFO L85 PathProgramCache]: Analyzing trace with hash -948337459, now seen corresponding path program 1 times [2023-04-03 02:40:32,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:32,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714189800] [2023-04-03 02:40:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:32,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:40:32,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:32,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714189800] [2023-04-03 02:40:32,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714189800] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:32,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:32,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:40:32,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882408416] [2023-04-03 02:40:32,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:32,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:40:32,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:32,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:40:32,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:40:32,930 INFO L87 Difference]: Start difference. First operand 5643 states and 6355 transitions. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 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) [2023-04-03 02:40:35,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:35,895 INFO L93 Difference]: Finished difference Result 9328 states and 10509 transitions. [2023-04-03 02:40:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:40:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 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 142 [2023-04-03 02:40:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:35,902 INFO L225 Difference]: With dead ends: 9328 [2023-04-03 02:40:35,902 INFO L226 Difference]: Without dead ends: 5805 [2023-04-03 02:40:35,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:40:35,906 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 839 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:35,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 386 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:40:35,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5805 states. [2023-04-03 02:40:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5805 to 4354. [2023-04-03 02:40:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 4350 states have (on average 1.103448275862069) internal successors, (4800), 4350 states have internal predecessors, (4800), 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) [2023-04-03 02:40:37,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 4803 transitions. [2023-04-03 02:40:37,893 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 4803 transitions. Word has length 142 [2023-04-03 02:40:37,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:37,893 INFO L495 AbstractCegarLoop]: Abstraction has 4354 states and 4803 transitions. [2023-04-03 02:40:37,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 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) [2023-04-03 02:40:37,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 4803 transitions. [2023-04-03 02:40:37,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-04-03 02:40:37,896 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:37,896 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:40:37,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-04-03 02:40:37,896 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:37,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:37,896 INFO L85 PathProgramCache]: Analyzing trace with hash 273726322, now seen corresponding path program 1 times [2023-04-03 02:40:37,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:37,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22704210] [2023-04-03 02:40:37,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:37,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:44,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:44,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22704210] [2023-04-03 02:40:44,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22704210] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:40:44,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828478936] [2023-04-03 02:40:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:44,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:40:44,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:40:44,257 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:40:44,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-03 02:40:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:44,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 53 conjunts are in the unsatisfiable core [2023-04-03 02:40:44,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:40:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 02:40:47,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:40:47,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828478936] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:47,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:40:47,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [46] total 67 [2023-04-03 02:40:47,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257300797] [2023-04-03 02:40:47,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:47,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-03 02:40:47,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:47,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-03 02:40:47,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=4107, Unknown=0, NotChecked=0, Total=4422 [2023-04-03 02:40:47,752 INFO L87 Difference]: Start difference. First operand 4354 states and 4803 transitions. Second operand has 24 states, 24 states have (on average 5.666666666666667) internal successors, (136), 23 states have internal predecessors, (136), 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)