/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_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:43:32,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:43:32,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:43:32,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 06:43:32,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:43:32,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:43:32,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:43:32,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:43:32,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:43:32,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:43:32,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:43:32,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:43:32,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:43:32,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:43:32,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:43:32,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:43:32,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 06:43:32,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:43:32,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:43:32,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:43:32,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:43:32,502 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:43:32,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:43:32,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:43:32,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:43:32,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:43:32,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:43:32,504 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:43:32,504 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:43:32,504 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:43:32,504 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:43:32,505 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:43:32,505 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:43:32,505 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:43:32,505 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:43:32,505 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:43:32,505 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:43:32,505 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:43:32,506 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:43:32,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:43:32,506 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:43:32,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:43:32,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:43:32,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:43:32,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:43:32,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:43:32,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:43:32,507 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:43:32,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:43:32,507 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:43:32,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:43:32,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:43:32,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:43:32,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:43:32,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:43:32,508 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:43:32,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:43:32,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:43:32,508 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:43:32,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:43:32,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:43:32,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:43:32,509 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:43:32,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:43:32,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:43:32,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:43:32,715 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:43:32,716 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:43:32,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 06:43:33,754 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:43:33,943 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:43:33,943 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 06:43:33,951 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e31e9476a/66ca7cd59a524e0bb603d69cbabf6b2e/FLAG59e3832a1 [2023-04-01 06:43:33,962 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e31e9476a/66ca7cd59a524e0bb603d69cbabf6b2e [2023-04-01 06:43:33,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:43:33,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:43:33,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:43:33,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:43:33,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:43:33,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:43:33" (1/1) ... [2023-04-01 06:43:33,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dcbddd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:43:33, skipping insertion in model container [2023-04-01 06:43:33,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:43:33" (1/1) ... [2023-04-01 06:43:33,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:43:34,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:43:34,311 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15866,15879] [2023-04-01 06:43:34,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:43:34,384 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:43:34,450 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15866,15879] [2023-04-01 06:43:34,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:43:34,491 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:43:34,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:43:34 WrapperNode [2023-04-01 06:43:34,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:43:34,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:43:34,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:43:34,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:43:34,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:43:34" (1/1) ... [2023-04-01 06:43:34,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:43:34" (1/1) ... [2023-04-01 06:43:34,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:43:34" (1/1) ... [2023-04-01 06:43:34,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:43:34" (1/1) ... [2023-04-01 06:43:34,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:43:34" (1/1) ... [2023-04-01 06:43:34,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:43:34" (1/1) ... [2023-04-01 06:43:34,548 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:43:34" (1/1) ... [2023-04-01 06:43:34,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:43:34" (1/1) ... [2023-04-01 06:43:34,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:43:34,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:43:34,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:43:34,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:43:34,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:43:34" (1/1) ... [2023-04-01 06:43:34,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:43:34,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:43:34,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:43:34,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:43:34,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:43:34,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:43:34,612 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:43:34,612 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:43:34,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:43:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:43:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:43:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:43:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:43:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:43:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:43:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:43:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:43:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:43:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:43:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:43:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:43:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:43:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:43:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:43:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:43:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:43:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:43:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:43:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:43:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:43:34,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:43:34,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:43:34,716 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:43:34,718 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:43:35,521 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:43:35,751 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:43:35,751 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:43:35,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:43:35 BoogieIcfgContainer [2023-04-01 06:43:35,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:43:35,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:43:35,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:43:35,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:43:35,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:43:33" (1/3) ... [2023-04-01 06:43:35,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639fad1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:43:35, skipping insertion in model container [2023-04-01 06:43:35,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:43:34" (2/3) ... [2023-04-01 06:43:35,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639fad1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:43:35, skipping insertion in model container [2023-04-01 06:43:35,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:43:35" (3/3) ... [2023-04-01 06:43:35,761 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 06:43:35,772 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:43:35,773 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:43:35,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:43:35,815 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;@4dfd941c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:43:35,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:43:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 264 states, 250 states have (on average 1.78) internal successors, (445), 259 states have internal predecessors, (445), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 06:43:35,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-01 06:43:35,851 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:35,851 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] [2023-04-01 06:43:35,852 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:35,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:35,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1415042422, now seen corresponding path program 1 times [2023-04-01 06:43:35,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:35,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486227890] [2023-04-01 06:43:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:35,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:43:37,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:37,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486227890] [2023-04-01 06:43:37,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486227890] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:37,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:37,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:43:37,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386263620] [2023-04-01 06:43:37,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:37,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:43:37,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:37,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:43:37,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:43:37,081 INFO L87 Difference]: Start difference. First operand has 264 states, 250 states have (on average 1.78) internal successors, (445), 259 states have internal predecessors, (445), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:37,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:43:37,341 INFO L93 Difference]: Finished difference Result 657 states and 1104 transitions. [2023-04-01 06:43:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 06:43:37,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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 122 [2023-04-01 06:43:37,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:43:37,358 INFO L225 Difference]: With dead ends: 657 [2023-04-01 06:43:37,358 INFO L226 Difference]: Without dead ends: 445 [2023-04-01 06:43:37,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:43:37,365 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 1481 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:43:37,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1481 Valid, 862 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:43:37,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2023-04-01 06:43:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 443. [2023-04-01 06:43:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 439 states have (on average 1.3599088838268794) internal successors, (597), 439 states have internal predecessors, (597), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 600 transitions. [2023-04-01 06:43:37,481 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 600 transitions. Word has length 122 [2023-04-01 06:43:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:43:37,481 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 600 transitions. [2023-04-01 06:43:37,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 600 transitions. [2023-04-01 06:43:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-01 06:43:37,483 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:37,484 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] [2023-04-01 06:43:37,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:43:37,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:37,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:37,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1265693296, now seen corresponding path program 1 times [2023-04-01 06:43:37,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:37,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975763054] [2023-04-01 06:43:37,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:37,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:43:37,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:37,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975763054] [2023-04-01 06:43:37,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975763054] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:37,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:37,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:43:37,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141163584] [2023-04-01 06:43:37,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:37,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:43:37,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:37,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:43:37,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:43:37,610 INFO L87 Difference]: Start difference. First operand 443 states and 600 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:43:37,728 INFO L93 Difference]: Finished difference Result 934 states and 1275 transitions. [2023-04-01 06:43:37,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:43:37,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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 124 [2023-04-01 06:43:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:43:37,733 INFO L225 Difference]: With dead ends: 934 [2023-04-01 06:43:37,737 INFO L226 Difference]: Without dead ends: 595 [2023-04-01 06:43:37,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:43:37,745 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 198 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:43:37,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 622 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:43:37,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2023-04-01 06:43:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 553. [2023-04-01 06:43:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 549 states have (on average 1.3916211293260474) internal successors, (764), 549 states have internal predecessors, (764), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 767 transitions. [2023-04-01 06:43:37,794 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 767 transitions. Word has length 124 [2023-04-01 06:43:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:43:37,796 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 767 transitions. [2023-04-01 06:43:37,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:37,796 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 767 transitions. [2023-04-01 06:43:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-01 06:43:37,800 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:37,800 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] [2023-04-01 06:43:37,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:43:37,800 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:37,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:37,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1364902873, now seen corresponding path program 1 times [2023-04-01 06:43:37,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:37,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789647239] [2023-04-01 06:43:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:37,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:43:37,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:37,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789647239] [2023-04-01 06:43:37,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789647239] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:37,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:37,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:43:37,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664466444] [2023-04-01 06:43:37,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:37,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:43:37,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:37,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:43:37,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:43:37,904 INFO L87 Difference]: Start difference. First operand 553 states and 767 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:38,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:43:38,068 INFO L93 Difference]: Finished difference Result 1342 states and 1905 transitions. [2023-04-01 06:43:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:43:38,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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 124 [2023-04-01 06:43:38,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:43:38,074 INFO L225 Difference]: With dead ends: 1342 [2023-04-01 06:43:38,074 INFO L226 Difference]: Without dead ends: 839 [2023-04-01 06:43:38,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:43:38,080 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 241 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:43:38,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 666 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:43:38,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2023-04-01 06:43:38,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 751. [2023-04-01 06:43:38,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 747 states have (on average 1.4243641231593038) internal successors, (1064), 747 states have internal predecessors, (1064), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1067 transitions. [2023-04-01 06:43:38,168 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1067 transitions. Word has length 124 [2023-04-01 06:43:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:43:38,169 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 1067 transitions. [2023-04-01 06:43:38,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:38,170 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1067 transitions. [2023-04-01 06:43:38,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-01 06:43:38,170 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:38,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:43:38,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:43:38,171 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:38,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:38,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1304587633, now seen corresponding path program 1 times [2023-04-01 06:43:38,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:38,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231939568] [2023-04-01 06:43:38,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:38,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:43:38,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:38,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231939568] [2023-04-01 06:43:38,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231939568] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:38,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:38,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:43:38,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117203046] [2023-04-01 06:43:38,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:38,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:43:38,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:38,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:43:38,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:43:38,705 INFO L87 Difference]: Start difference. First operand 751 states and 1067 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:38,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:43:38,922 INFO L93 Difference]: Finished difference Result 1932 states and 2755 transitions. [2023-04-01 06:43:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:43:38,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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 127 [2023-04-01 06:43:38,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:43:38,927 INFO L225 Difference]: With dead ends: 1932 [2023-04-01 06:43:38,927 INFO L226 Difference]: Without dead ends: 1285 [2023-04-01 06:43:38,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:43:38,932 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 519 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:43:38,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 695 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:43:38,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2023-04-01 06:43:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1283. [2023-04-01 06:43:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1279 states have (on average 1.4128225175918687) internal successors, (1807), 1279 states have internal predecessors, (1807), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:39,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1810 transitions. [2023-04-01 06:43:39,067 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1810 transitions. Word has length 127 [2023-04-01 06:43:39,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:43:39,067 INFO L495 AbstractCegarLoop]: Abstraction has 1283 states and 1810 transitions. [2023-04-01 06:43:39,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:39,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1810 transitions. [2023-04-01 06:43:39,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-01 06:43:39,068 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:39,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:43:39,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:43:39,069 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:39,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1150807507, now seen corresponding path program 1 times [2023-04-01 06:43:39,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:39,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518978265] [2023-04-01 06:43:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:39,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:43:39,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:39,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518978265] [2023-04-01 06:43:39,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518978265] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:39,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:39,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:43:39,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565803235] [2023-04-01 06:43:39,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:39,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:43:39,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:39,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:43:39,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:43:39,141 INFO L87 Difference]: Start difference. First operand 1283 states and 1810 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:39,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:43:39,428 INFO L93 Difference]: Finished difference Result 3209 states and 4592 transitions. [2023-04-01 06:43:39,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:43:39,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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 129 [2023-04-01 06:43:39,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:43:39,435 INFO L225 Difference]: With dead ends: 3209 [2023-04-01 06:43:39,435 INFO L226 Difference]: Without dead ends: 2012 [2023-04-01 06:43:39,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:43:39,438 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 217 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:43:39,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 641 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:43:39,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2023-04-01 06:43:39,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1899. [2023-04-01 06:43:39,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1895 states have (on average 1.4369393139841689) internal successors, (2723), 1895 states have internal predecessors, (2723), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 2726 transitions. [2023-04-01 06:43:39,690 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 2726 transitions. Word has length 129 [2023-04-01 06:43:39,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:43:39,691 INFO L495 AbstractCegarLoop]: Abstraction has 1899 states and 2726 transitions. [2023-04-01 06:43:39,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:39,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 2726 transitions. [2023-04-01 06:43:39,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 06:43:39,692 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:39,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:43:39,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:43:39,693 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:39,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:39,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1785373716, now seen corresponding path program 1 times [2023-04-01 06:43:39,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:39,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582808867] [2023-04-01 06:43:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:39,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:43:39,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:39,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582808867] [2023-04-01 06:43:39,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582808867] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:39,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:39,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:43:39,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508587146] [2023-04-01 06:43:39,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:39,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:43:39,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:39,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:43:39,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:43:39,781 INFO L87 Difference]: Start difference. First operand 1899 states and 2726 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:43:40,105 INFO L93 Difference]: Finished difference Result 3736 states and 5406 transitions. [2023-04-01 06:43:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:43:40,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 132 [2023-04-01 06:43:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:43:40,115 INFO L225 Difference]: With dead ends: 3736 [2023-04-01 06:43:40,115 INFO L226 Difference]: Without dead ends: 2854 [2023-04-01 06:43:40,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:43:40,118 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 216 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:43:40,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 654 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:43:40,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2023-04-01 06:43:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2852. [2023-04-01 06:43:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2848 states have (on average 1.428370786516854) internal successors, (4068), 2848 states have internal predecessors, (4068), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:40,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4071 transitions. [2023-04-01 06:43:40,420 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4071 transitions. Word has length 132 [2023-04-01 06:43:40,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:43:40,421 INFO L495 AbstractCegarLoop]: Abstraction has 2852 states and 4071 transitions. [2023-04-01 06:43:40,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4071 transitions. [2023-04-01 06:43:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 06:43:40,423 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:40,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:43:40,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:43:40,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:40,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:40,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1087602212, now seen corresponding path program 1 times [2023-04-01 06:43:40,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:40,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85250516] [2023-04-01 06:43:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:40,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:43:40,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:40,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85250516] [2023-04-01 06:43:40,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85250516] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:40,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:40,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:43:40,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484661430] [2023-04-01 06:43:40,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:40,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:43:40,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:40,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:43:40,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:43:40,554 INFO L87 Difference]: Start difference. First operand 2852 states and 4071 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:40,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:43:40,998 INFO L93 Difference]: Finished difference Result 5626 states and 8043 transitions. [2023-04-01 06:43:40,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:43:40,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 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 132 [2023-04-01 06:43:40,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:43:41,007 INFO L225 Difference]: With dead ends: 5626 [2023-04-01 06:43:41,007 INFO L226 Difference]: Without dead ends: 2852 [2023-04-01 06:43:41,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:43:41,013 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 900 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:43:41,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 261 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:43:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2023-04-01 06:43:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2852. [2023-04-01 06:43:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2848 states have (on average 1.4101123595505618) internal successors, (4016), 2848 states have internal predecessors, (4016), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:41,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4019 transitions. [2023-04-01 06:43:41,333 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4019 transitions. Word has length 132 [2023-04-01 06:43:41,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:43:41,334 INFO L495 AbstractCegarLoop]: Abstraction has 2852 states and 4019 transitions. [2023-04-01 06:43:41,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4019 transitions. [2023-04-01 06:43:41,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 06:43:41,336 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:41,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:43:41,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:43:41,337 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:41,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:41,337 INFO L85 PathProgramCache]: Analyzing trace with hash -81225217, now seen corresponding path program 1 times [2023-04-01 06:43:41,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:41,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015696219] [2023-04-01 06:43:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:41,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:43:41,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:41,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015696219] [2023-04-01 06:43:41,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015696219] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:41,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:41,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:43:41,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176234923] [2023-04-01 06:43:41,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:41,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:43:41,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:41,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:43:41,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:43:41,902 INFO L87 Difference]: Start difference. First operand 2852 states and 4019 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:42,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:43:42,691 INFO L93 Difference]: Finished difference Result 8048 states and 11395 transitions. [2023-04-01 06:43:42,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:43:42,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 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 132 [2023-04-01 06:43:42,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:43:42,708 INFO L225 Difference]: With dead ends: 8048 [2023-04-01 06:43:42,709 INFO L226 Difference]: Without dead ends: 5438 [2023-04-01 06:43:42,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:43:42,715 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 533 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:43:42,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 746 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:43:42,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5438 states. [2023-04-01 06:43:43,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5438 to 5436. [2023-04-01 06:43:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5436 states, 5432 states have (on average 1.4004050073637702) internal successors, (7607), 5432 states have internal predecessors, (7607), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5436 states to 5436 states and 7610 transitions. [2023-04-01 06:43:43,376 INFO L78 Accepts]: Start accepts. Automaton has 5436 states and 7610 transitions. Word has length 132 [2023-04-01 06:43:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:43:43,376 INFO L495 AbstractCegarLoop]: Abstraction has 5436 states and 7610 transitions. [2023-04-01 06:43:43,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:43,376 INFO L276 IsEmpty]: Start isEmpty. Operand 5436 states and 7610 transitions. [2023-04-01 06:43:43,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 06:43:43,379 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:43,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:43:43,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:43:43,379 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:43,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:43,380 INFO L85 PathProgramCache]: Analyzing trace with hash -31282791, now seen corresponding path program 1 times [2023-04-01 06:43:43,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:43,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435664558] [2023-04-01 06:43:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:43,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:43:43,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:43,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435664558] [2023-04-01 06:43:43,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435664558] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:43,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:43,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:43:43,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284308398] [2023-04-01 06:43:43,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:43,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:43:43,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:43,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:43:43,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:43:43,959 INFO L87 Difference]: Start difference. First operand 5436 states and 7610 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:44,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:43:44,644 INFO L93 Difference]: Finished difference Result 8724 states and 12327 transitions. [2023-04-01 06:43:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:43:44,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 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 132 [2023-04-01 06:43:44,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:43:44,660 INFO L225 Difference]: With dead ends: 8724 [2023-04-01 06:43:44,660 INFO L226 Difference]: Without dead ends: 5689 [2023-04-01 06:43:44,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:43:44,665 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 504 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:43:44,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 776 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:43:44,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5689 states. [2023-04-01 06:43:45,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5689 to 4897. [2023-04-01 06:43:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4897 states, 4893 states have (on average 1.4030247292049867) internal successors, (6865), 4893 states have internal predecessors, (6865), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4897 states to 4897 states and 6868 transitions. [2023-04-01 06:43:45,300 INFO L78 Accepts]: Start accepts. Automaton has 4897 states and 6868 transitions. Word has length 132 [2023-04-01 06:43:45,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:43:45,300 INFO L495 AbstractCegarLoop]: Abstraction has 4897 states and 6868 transitions. [2023-04-01 06:43:45,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:45,300 INFO L276 IsEmpty]: Start isEmpty. Operand 4897 states and 6868 transitions. [2023-04-01 06:43:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 06:43:45,302 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:45,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:43:45,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:43:45,303 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:45,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:45,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1749215372, now seen corresponding path program 1 times [2023-04-01 06:43:45,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:45,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468336056] [2023-04-01 06:43:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:45,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:43:45,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:45,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468336056] [2023-04-01 06:43:45,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468336056] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:45,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:45,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 06:43:45,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829064732] [2023-04-01 06:43:45,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:45,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:43:45,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:45,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:43:45,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:43:45,865 INFO L87 Difference]: Start difference. First operand 4897 states and 6868 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:46,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:43:46,844 INFO L93 Difference]: Finished difference Result 11399 states and 16048 transitions. [2023-04-01 06:43:46,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 06:43:46,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 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 132 [2023-04-01 06:43:46,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:43:46,863 INFO L225 Difference]: With dead ends: 11399 [2023-04-01 06:43:46,863 INFO L226 Difference]: Without dead ends: 6884 [2023-04-01 06:43:46,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:43:46,870 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 860 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:43:46,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 813 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:43:46,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6884 states. [2023-04-01 06:43:47,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6884 to 6882. [2023-04-01 06:43:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6882 states, 6878 states have (on average 1.384704856062809) internal successors, (9524), 6878 states have internal predecessors, (9524), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6882 states to 6882 states and 9527 transitions. [2023-04-01 06:43:47,780 INFO L78 Accepts]: Start accepts. Automaton has 6882 states and 9527 transitions. Word has length 132 [2023-04-01 06:43:47,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:43:47,781 INFO L495 AbstractCegarLoop]: Abstraction has 6882 states and 9527 transitions. [2023-04-01 06:43:47,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:43:47,781 INFO L276 IsEmpty]: Start isEmpty. Operand 6882 states and 9527 transitions. [2023-04-01 06:43:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 06:43:47,784 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:47,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:43:47,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 06:43:47,784 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:47,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:47,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1482139424, now seen corresponding path program 1 times [2023-04-01 06:43:47,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:47,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689184854] [2023-04-01 06:43:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:47,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:43:57,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:57,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689184854] [2023-04-01 06:43:57,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689184854] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:57,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:57,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2023-04-01 06:43:57,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076482935] [2023-04-01 06:43:57,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:57,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-01 06:43:57,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:57,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-01 06:43:57,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 06:43:57,063 INFO L87 Difference]: Start difference. First operand 6882 states and 9527 transitions. Second operand has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 38 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:44:14,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:44:14,390 INFO L93 Difference]: Finished difference Result 24980 states and 35041 transitions. [2023-04-01 06:44:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-01 06:44:14,392 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 38 states have internal predecessors, (134), 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 137 [2023-04-01 06:44:14,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:44:14,425 INFO L225 Difference]: With dead ends: 24980 [2023-04-01 06:44:14,425 INFO L226 Difference]: Without dead ends: 18144 [2023-04-01 06:44:14,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1500, Invalid=5810, Unknown=0, NotChecked=0, Total=7310 [2023-04-01 06:44:14,438 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 5885 mSDsluCounter, 6229 mSDsCounter, 0 mSdLazyCounter, 5963 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5885 SdHoareTripleChecker+Valid, 6609 SdHoareTripleChecker+Invalid, 6070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 5963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:44:14,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5885 Valid, 6609 Invalid, 6070 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [107 Valid, 5963 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-04-01 06:44:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18144 states. [2023-04-01 06:44:16,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18144 to 13677. [2023-04-01 06:44:17,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13677 states, 13673 states have (on average 1.4016675199297886) internal successors, (19165), 13673 states have internal predecessors, (19165), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:44:17,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13677 states to 13677 states and 19168 transitions. [2023-04-01 06:44:17,036 INFO L78 Accepts]: Start accepts. Automaton has 13677 states and 19168 transitions. Word has length 137 [2023-04-01 06:44:17,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:44:17,037 INFO L495 AbstractCegarLoop]: Abstraction has 13677 states and 19168 transitions. [2023-04-01 06:44:17,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 38 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:44:17,038 INFO L276 IsEmpty]: Start isEmpty. Operand 13677 states and 19168 transitions. [2023-04-01 06:44:17,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 06:44:17,043 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:44:17,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:44:17,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 06:44:17,043 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:44:17,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:44:17,043 INFO L85 PathProgramCache]: Analyzing trace with hash 266116557, now seen corresponding path program 1 times [2023-04-01 06:44:17,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:44:17,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495454918] [2023-04-01 06:44:17,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:44:17,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:44:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:44:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:44:17,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:44:17,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495454918] [2023-04-01 06:44:17,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495454918] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:44:17,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:44:17,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:44:17,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204086661] [2023-04-01 06:44:17,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:44:17,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:44:17,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:44:17,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:44:17,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:44:17,529 INFO L87 Difference]: Start difference. First operand 13677 states and 19168 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:44:20,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:44:20,064 INFO L93 Difference]: Finished difference Result 17983 states and 25291 transitions. [2023-04-01 06:44:20,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:44:20,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 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 [2023-04-01 06:44:20,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:44:20,089 INFO L225 Difference]: With dead ends: 17983 [2023-04-01 06:44:20,089 INFO L226 Difference]: Without dead ends: 12854 [2023-04-01 06:44:20,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:44:20,098 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 867 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:44:20,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 711 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:44:20,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12854 states. [2023-04-01 06:44:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12854 to 12852. [2023-04-01 06:44:22,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12852 states, 12848 states have (on average 1.4015410958904109) internal successors, (18007), 12848 states have internal predecessors, (18007), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:44:22,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12852 states to 12852 states and 18010 transitions. [2023-04-01 06:44:22,714 INFO L78 Accepts]: Start accepts. Automaton has 12852 states and 18010 transitions. Word has length 137 [2023-04-01 06:44:22,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:44:22,714 INFO L495 AbstractCegarLoop]: Abstraction has 12852 states and 18010 transitions. [2023-04-01 06:44:22,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:44:22,715 INFO L276 IsEmpty]: Start isEmpty. Operand 12852 states and 18010 transitions. [2023-04-01 06:44:22,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 06:44:22,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:44:22,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:44:22,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 06:44:22,719 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:44:22,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:44:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1102287040, now seen corresponding path program 1 times [2023-04-01 06:44:22,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:44:22,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766406937] [2023-04-01 06:44:22,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:44:22,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:44:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:44:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:44:26,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:44:26,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766406937] [2023-04-01 06:44:26,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766406937] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:44:26,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:44:26,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2023-04-01 06:44:26,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408094011] [2023-04-01 06:44:26,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:44:26,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 06:44:26,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:44:26,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 06:44:26,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2023-04-01 06:44:26,155 INFO L87 Difference]: Start difference. First operand 12852 states and 18010 transitions. Second operand has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 27 states have internal predecessors, (134), 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)