/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:50:32,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:50:32,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:50:32,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 12:50:32,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:50:32,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:50:32,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:50:32,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:50:32,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:50:32,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:50:32,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:50:32,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:50:32,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:50:32,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:50:32,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:50:32,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:50:32,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 12:50:32,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:50:32,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:50:32,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:50:32,387 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:50:32,407 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:50:32,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:50:32,407 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:50:32,407 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:50:32,408 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:50:32,408 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:50:32,409 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:50:32,409 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:50:32,409 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:50:32,409 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:50:32,409 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:50:32,409 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:50:32,409 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:50:32,409 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:50:32,410 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:50:32,410 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:50:32,410 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:50:32,410 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:50:32,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:50:32,411 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:50:32,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:50:32,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:50:32,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:50:32,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:50:32,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:50:32,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:50:32,412 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:50:32,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:50:32,412 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:50:32,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:50:32,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:50:32,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:50:32,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:50:32,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:50:32,413 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:50:32,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:50:32,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:50:32,413 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:50:32,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:50:32,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:50:32,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:50:32,414 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:50:32,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:50:32,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:50:32,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:50:32,627 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:50:32,627 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:50:32,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-01 12:50:33,862 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:50:34,112 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:50:34,114 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-01 12:50:34,129 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e23f062aa/5ad1509881c5438caa1604b25a99dc58/FLAG034f46f38 [2023-04-01 12:50:34,142 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e23f062aa/5ad1509881c5438caa1604b25a99dc58 [2023-04-01 12:50:34,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:50:34,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:50:34,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:50:34,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:50:34,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:50:34,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:50:34" (1/1) ... [2023-04-01 12:50:34,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d521170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:50:34, skipping insertion in model container [2023-04-01 12:50:34,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:50:34" (1/1) ... [2023-04-01 12:50:34,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:50:34,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:50:34,406 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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13338,13351] [2023-04-01 12:50:34,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:50:34,505 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:50:34,576 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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13338,13351] [2023-04-01 12:50:34,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:50:34,662 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:50:34,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:50:34 WrapperNode [2023-04-01 12:50:34,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:50:34,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:50:34,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:50:34,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:50:34,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:50:34" (1/1) ... [2023-04-01 12:50:34,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:50:34" (1/1) ... [2023-04-01 12:50:34,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:50:34" (1/1) ... [2023-04-01 12:50:34,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:50:34" (1/1) ... [2023-04-01 12:50:34,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:50:34" (1/1) ... [2023-04-01 12:50:34,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:50:34" (1/1) ... [2023-04-01 12:50:34,766 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:50:34" (1/1) ... [2023-04-01 12:50:34,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:50:34" (1/1) ... [2023-04-01 12:50:34,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:50:34,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:50:34,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:50:34,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:50:34,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:50:34" (1/1) ... [2023-04-01 12:50:34,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:50:34,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:50:34,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:50:34,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:50:34,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:50:34,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:50:34,843 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:50:34,843 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:50:34,844 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:50:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:50:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:50:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:50:34,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:50:34,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:50:34,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:50:34,845 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:50:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:50:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:50:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:50:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:50:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:50:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:50:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:50:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:50:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:50:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:50:34,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:50:34,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:50:34,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:50:34,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:50:34,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:50:34,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:50:35,123 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:50:35,125 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:50:35,980 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:50:36,232 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:50:36,232 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:50:36,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:50:36 BoogieIcfgContainer [2023-04-01 12:50:36,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:50:36,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:50:36,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:50:36,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:50:36,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:50:34" (1/3) ... [2023-04-01 12:50:36,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51272ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:50:36, skipping insertion in model container [2023-04-01 12:50:36,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:50:34" (2/3) ... [2023-04-01 12:50:36,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51272ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:50:36, skipping insertion in model container [2023-04-01 12:50:36,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:50:36" (3/3) ... [2023-04-01 12:50:36,247 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-01 12:50:36,262 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:50:36,262 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:50:36,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:50:36,333 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;@1805a675, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:50:36,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:50:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 276 states, 263 states have (on average 1.6768060836501901) internal successors, (441), 271 states have internal predecessors, (441), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:50:36,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-01 12:50:36,359 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:36,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:50:36,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:36,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:36,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1288628712, now seen corresponding path program 1 times [2023-04-01 12:50:36,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:36,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933634791] [2023-04-01 12:50:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:36,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:50:36,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:36,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933634791] [2023-04-01 12:50:36,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933634791] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:36,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:50:36,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:50:36,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771061530] [2023-04-01 12:50:36,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:36,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:50:36,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:36,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:50:37,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:37,003 INFO L87 Difference]: Start difference. First operand has 276 states, 263 states have (on average 1.6768060836501901) internal successors, (441), 271 states have internal predecessors, (441), 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 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:37,231 INFO L93 Difference]: Finished difference Result 488 states and 768 transitions. [2023-04-01 12:50:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:50:37,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2023-04-01 12:50:37,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:37,250 INFO L225 Difference]: With dead ends: 488 [2023-04-01 12:50:37,251 INFO L226 Difference]: Without dead ends: 350 [2023-04-01 12:50:37,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:37,263 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 184 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:37,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 908 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:50:37,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-04-01 12:50:37,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 348. [2023-04-01 12:50:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 344 states have (on average 1.5290697674418605) internal successors, (526), 344 states have internal predecessors, (526), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:37,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 529 transitions. [2023-04-01 12:50:37,352 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 529 transitions. Word has length 101 [2023-04-01 12:50:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:50:37,353 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 529 transitions. [2023-04-01 12:50:37,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:37,353 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 529 transitions. [2023-04-01 12:50:37,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 12:50:37,360 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:37,360 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] [2023-04-01 12:50:37,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:50:37,361 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:37,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:37,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1631028562, now seen corresponding path program 1 times [2023-04-01 12:50:37,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:37,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229405151] [2023-04-01 12:50:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:37,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:50:37,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:37,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229405151] [2023-04-01 12:50:37,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229405151] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:37,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:50:37,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:50:37,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501415117] [2023-04-01 12:50:37,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:37,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:50:37,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:37,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:50:37,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:37,596 INFO L87 Difference]: Start difference. First operand 348 states and 529 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:37,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:37,705 INFO L93 Difference]: Finished difference Result 642 states and 993 transitions. [2023-04-01 12:50:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:50:37,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 103 [2023-04-01 12:50:37,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:37,708 INFO L225 Difference]: With dead ends: 642 [2023-04-01 12:50:37,709 INFO L226 Difference]: Without dead ends: 454 [2023-04-01 12:50:37,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:37,711 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 160 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:37,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 696 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:50:37,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-04-01 12:50:37,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 452. [2023-04-01 12:50:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 448 states have (on average 1.5357142857142858) internal successors, (688), 448 states have internal predecessors, (688), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 691 transitions. [2023-04-01 12:50:37,732 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 691 transitions. Word has length 103 [2023-04-01 12:50:37,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:50:37,733 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 691 transitions. [2023-04-01 12:50:37,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 691 transitions. [2023-04-01 12:50:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-01 12:50:37,734 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:37,735 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] [2023-04-01 12:50:37,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:50:37,735 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:37,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:37,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1473161969, now seen corresponding path program 1 times [2023-04-01 12:50:37,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:37,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176131254] [2023-04-01 12:50:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:37,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:50:37,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:37,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176131254] [2023-04-01 12:50:37,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176131254] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:37,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:50:37,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:50:37,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289435481] [2023-04-01 12:50:37,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:37,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:50:37,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:37,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:50:37,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:37,898 INFO L87 Difference]: Start difference. First operand 452 states and 691 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:38,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:38,011 INFO L93 Difference]: Finished difference Result 972 states and 1506 transitions. [2023-04-01 12:50:38,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:50:38,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 106 [2023-04-01 12:50:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:38,018 INFO L225 Difference]: With dead ends: 972 [2023-04-01 12:50:38,018 INFO L226 Difference]: Without dead ends: 682 [2023-04-01 12:50:38,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:38,028 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 158 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:38,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 780 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:50:38,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2023-04-01 12:50:38,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2023-04-01 12:50:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 676 states have (on average 1.5414201183431953) internal successors, (1042), 676 states have internal predecessors, (1042), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1045 transitions. [2023-04-01 12:50:38,076 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1045 transitions. Word has length 106 [2023-04-01 12:50:38,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:50:38,079 INFO L495 AbstractCegarLoop]: Abstraction has 680 states and 1045 transitions. [2023-04-01 12:50:38,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:38,079 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1045 transitions. [2023-04-01 12:50:38,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-01 12:50:38,087 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:38,087 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] [2023-04-01 12:50:38,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:50:38,087 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:38,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:38,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1463497148, now seen corresponding path program 1 times [2023-04-01 12:50:38,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:38,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839063562] [2023-04-01 12:50:38,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:38,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:50:38,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:38,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839063562] [2023-04-01 12:50:38,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839063562] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:38,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:50:38,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:50:38,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758203399] [2023-04-01 12:50:38,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:38,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:50:38,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:38,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:50:38,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:38,285 INFO L87 Difference]: Start difference. First operand 680 states and 1045 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:38,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:38,441 INFO L93 Difference]: Finished difference Result 1510 states and 2347 transitions. [2023-04-01 12:50:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:50:38,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 108 [2023-04-01 12:50:38,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:38,446 INFO L225 Difference]: With dead ends: 1510 [2023-04-01 12:50:38,446 INFO L226 Difference]: Without dead ends: 992 [2023-04-01 12:50:38,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:38,449 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 157 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:38,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 713 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:50:38,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2023-04-01 12:50:38,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 990. [2023-04-01 12:50:38,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 986 states have (on average 1.550709939148073) internal successors, (1529), 986 states have internal predecessors, (1529), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:38,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1532 transitions. [2023-04-01 12:50:38,547 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1532 transitions. Word has length 108 [2023-04-01 12:50:38,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:50:38,548 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 1532 transitions. [2023-04-01 12:50:38,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:38,548 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1532 transitions. [2023-04-01 12:50:38,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 12:50:38,549 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:38,549 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] [2023-04-01 12:50:38,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:50:38,550 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:38,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:38,550 INFO L85 PathProgramCache]: Analyzing trace with hash 303133274, now seen corresponding path program 1 times [2023-04-01 12:50:38,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:38,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454762225] [2023-04-01 12:50:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:38,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:50:38,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:38,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454762225] [2023-04-01 12:50:38,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454762225] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:38,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:50:38,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:50:38,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374251390] [2023-04-01 12:50:38,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:38,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:50:38,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:50:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:38,700 INFO L87 Difference]: Start difference. First operand 990 states and 1532 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:38,891 INFO L93 Difference]: Finished difference Result 2422 states and 3763 transitions. [2023-04-01 12:50:38,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:50:38,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 111 [2023-04-01 12:50:38,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:38,904 INFO L225 Difference]: With dead ends: 2422 [2023-04-01 12:50:38,905 INFO L226 Difference]: Without dead ends: 1616 [2023-04-01 12:50:38,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:38,910 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 151 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:38,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 746 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:50:38,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2023-04-01 12:50:39,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1614. [2023-04-01 12:50:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1610 states have (on average 1.5440993788819877) internal successors, (2486), 1610 states have internal predecessors, (2486), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:39,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2489 transitions. [2023-04-01 12:50:39,082 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2489 transitions. Word has length 111 [2023-04-01 12:50:39,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:50:39,082 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 2489 transitions. [2023-04-01 12:50:39,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:39,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2489 transitions. [2023-04-01 12:50:39,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-01 12:50:39,084 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:39,084 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] [2023-04-01 12:50:39,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:50:39,085 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:39,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:39,085 INFO L85 PathProgramCache]: Analyzing trace with hash -124475916, now seen corresponding path program 1 times [2023-04-01 12:50:39,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:39,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346494881] [2023-04-01 12:50:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:39,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:50:39,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:39,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346494881] [2023-04-01 12:50:39,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346494881] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:39,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:50:39,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:50:39,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019684272] [2023-04-01 12:50:39,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:39,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:50:39,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:39,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:50:39,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:39,259 INFO L87 Difference]: Start difference. First operand 1614 states and 2489 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:39,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:39,491 INFO L93 Difference]: Finished difference Result 3872 states and 6008 transitions. [2023-04-01 12:50:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:50:39,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 113 [2023-04-01 12:50:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:39,505 INFO L225 Difference]: With dead ends: 3872 [2023-04-01 12:50:39,505 INFO L226 Difference]: Without dead ends: 2442 [2023-04-01 12:50:39,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:39,511 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 150 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:39,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 715 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:50:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2023-04-01 12:50:39,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2440. [2023-04-01 12:50:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2436 states have (on average 1.5492610837438423) internal successors, (3774), 2436 states have internal predecessors, (3774), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3777 transitions. [2023-04-01 12:50:39,726 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3777 transitions. Word has length 113 [2023-04-01 12:50:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:50:39,726 INFO L495 AbstractCegarLoop]: Abstraction has 2440 states and 3777 transitions. [2023-04-01 12:50:39,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3777 transitions. [2023-04-01 12:50:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-04-01 12:50:39,727 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:39,727 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] [2023-04-01 12:50:39,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:50:39,728 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:39,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash 948756071, now seen corresponding path program 1 times [2023-04-01 12:50:39,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:39,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814240476] [2023-04-01 12:50:39,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:39,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:50:39,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:39,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814240476] [2023-04-01 12:50:39,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814240476] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:39,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:50:39,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:50:39,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267303350] [2023-04-01 12:50:39,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:39,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:50:39,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:39,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:50:39,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:39,849 INFO L87 Difference]: Start difference. First operand 2440 states and 3777 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:40,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:40,251 INFO L93 Difference]: Finished difference Result 6368 states and 9836 transitions. [2023-04-01 12:50:40,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:50:40,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 116 [2023-04-01 12:50:40,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:40,268 INFO L225 Difference]: With dead ends: 6368 [2023-04-01 12:50:40,269 INFO L226 Difference]: Without dead ends: 4134 [2023-04-01 12:50:40,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:40,274 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 144 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:40,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 712 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:50:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2023-04-01 12:50:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 4132. [2023-04-01 12:50:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4132 states, 4128 states have (on average 1.5334302325581395) internal successors, (6330), 4128 states have internal predecessors, (6330), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4132 states to 4132 states and 6333 transitions. [2023-04-01 12:50:40,627 INFO L78 Accepts]: Start accepts. Automaton has 4132 states and 6333 transitions. Word has length 116 [2023-04-01 12:50:40,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:50:40,627 INFO L495 AbstractCegarLoop]: Abstraction has 4132 states and 6333 transitions. [2023-04-01 12:50:40,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:40,627 INFO L276 IsEmpty]: Start isEmpty. Operand 4132 states and 6333 transitions. [2023-04-01 12:50:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-01 12:50:40,629 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:40,629 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] [2023-04-01 12:50:40,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:50:40,629 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:40,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:40,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1960607373, now seen corresponding path program 1 times [2023-04-01 12:50:40,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:40,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114556366] [2023-04-01 12:50:40,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:40,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:50:40,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:40,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114556366] [2023-04-01 12:50:40,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114556366] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:40,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:50:40,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:50:40,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626926716] [2023-04-01 12:50:40,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:40,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:50:40,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:40,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:50:40,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:40,749 INFO L87 Difference]: Start difference. First operand 4132 states and 6333 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:41,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:41,276 INFO L93 Difference]: Finished difference Result 10314 states and 15873 transitions. [2023-04-01 12:50:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:50:41,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 118 [2023-04-01 12:50:41,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:41,300 INFO L225 Difference]: With dead ends: 10314 [2023-04-01 12:50:41,300 INFO L226 Difference]: Without dead ends: 6388 [2023-04-01 12:50:41,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:41,310 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 143 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:41,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 717 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:50:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6388 states. [2023-04-01 12:50:41,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6388 to 6386. [2023-04-01 12:50:41,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6386 states, 6382 states have (on average 1.537292384832341) internal successors, (9811), 6382 states have internal predecessors, (9811), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 9814 transitions. [2023-04-01 12:50:41,780 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 9814 transitions. Word has length 118 [2023-04-01 12:50:41,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:50:41,780 INFO L495 AbstractCegarLoop]: Abstraction has 6386 states and 9814 transitions. [2023-04-01 12:50:41,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 9814 transitions. [2023-04-01 12:50:41,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 12:50:41,782 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:41,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:50:41,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:50:41,782 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:41,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:41,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1940796581, now seen corresponding path program 1 times [2023-04-01 12:50:41,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:41,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119256561] [2023-04-01 12:50:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:41,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:50:41,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:41,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119256561] [2023-04-01 12:50:41,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119256561] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:41,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:50:41,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:50:41,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805574615] [2023-04-01 12:50:41,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:41,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:50:41,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:41,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:50:41,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:50:41,978 INFO L87 Difference]: Start difference. First operand 6386 states and 9814 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:43,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:43,065 INFO L93 Difference]: Finished difference Result 16010 states and 24680 transitions. [2023-04-01 12:50:43,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:50:43,065 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2023-04-01 12:50:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:43,118 INFO L225 Difference]: With dead ends: 16010 [2023-04-01 12:50:43,118 INFO L226 Difference]: Without dead ends: 9798 [2023-04-01 12:50:43,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:50:43,134 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 1233 mSDsluCounter, 3141 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 3522 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:43,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 3522 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:50:43,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9798 states. [2023-04-01 12:50:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9798 to 9741. [2023-04-01 12:50:43,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9741 states, 9737 states have (on average 1.54308308513916) internal successors, (15025), 9737 states have internal predecessors, (15025), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:44,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9741 states to 9741 states and 15028 transitions. [2023-04-01 12:50:44,018 INFO L78 Accepts]: Start accepts. Automaton has 9741 states and 15028 transitions. Word has length 121 [2023-04-01 12:50:44,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:50:44,019 INFO L495 AbstractCegarLoop]: Abstraction has 9741 states and 15028 transitions. [2023-04-01 12:50:44,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:44,020 INFO L276 IsEmpty]: Start isEmpty. Operand 9741 states and 15028 transitions. [2023-04-01 12:50:44,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-01 12:50:44,021 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:44,021 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 12:50:44,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:50:44,021 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:44,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:44,025 INFO L85 PathProgramCache]: Analyzing trace with hash -31016443, now seen corresponding path program 1 times [2023-04-01 12:50:44,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:44,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640588496] [2023-04-01 12:50:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:44,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:50:44,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:44,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640588496] [2023-04-01 12:50:44,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640588496] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:44,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:50:44,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:50:44,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822809925] [2023-04-01 12:50:44,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:44,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:50:44,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:44,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:50:44,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:50:44,186 INFO L87 Difference]: Start difference. First operand 9741 states and 15028 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 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 12:50:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:45,063 INFO L93 Difference]: Finished difference Result 19256 states and 29721 transitions. [2023-04-01 12:50:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:50:45,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 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 12:50:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:45,090 INFO L225 Difference]: With dead ends: 19256 [2023-04-01 12:50:45,091 INFO L226 Difference]: Without dead ends: 9743 [2023-04-01 12:50:45,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:50:45,114 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 301 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:45,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1056 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:50:45,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9743 states. [2023-04-01 12:50:45,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9743 to 9734. [2023-04-01 12:50:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9734 states, 9730 states have (on average 1.5399794450154163) internal successors, (14984), 9730 states have internal predecessors, (14984), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9734 states to 9734 states and 14987 transitions. [2023-04-01 12:50:45,950 INFO L78 Accepts]: Start accepts. Automaton has 9734 states and 14987 transitions. Word has length 122 [2023-04-01 12:50:45,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:50:45,950 INFO L495 AbstractCegarLoop]: Abstraction has 9734 states and 14987 transitions. [2023-04-01 12:50:45,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 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 12:50:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 9734 states and 14987 transitions. [2023-04-01 12:50:45,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 12:50:45,952 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:45,952 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] [2023-04-01 12:50:45,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:50:45,952 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:45,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:45,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1675882112, now seen corresponding path program 1 times [2023-04-01 12:50:45,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:45,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467582189] [2023-04-01 12:50:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:45,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:50:46,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:46,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467582189] [2023-04-01 12:50:46,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467582189] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:46,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:50:46,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:50:46,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360986031] [2023-04-01 12:50:46,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:46,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:50:46,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:46,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:50:46,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:50:46,418 INFO L87 Difference]: Start difference. First operand 9734 states and 14987 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:47,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:47,813 INFO L93 Difference]: Finished difference Result 15584 states and 23757 transitions. [2023-04-01 12:50:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:50:47,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2023-04-01 12:50:47,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:47,852 INFO L225 Difference]: With dead ends: 15584 [2023-04-01 12:50:47,852 INFO L226 Difference]: Without dead ends: 15582 [2023-04-01 12:50:47,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:50:47,858 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 309 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:47,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 1772 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:50:47,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15582 states. [2023-04-01 12:50:48,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15582 to 9858. [2023-04-01 12:50:48,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9858 states, 9854 states have (on average 1.5257763344834585) internal successors, (15035), 9854 states have internal predecessors, (15035), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:48,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9858 states to 9858 states and 15038 transitions. [2023-04-01 12:50:48,832 INFO L78 Accepts]: Start accepts. Automaton has 9858 states and 15038 transitions. Word has length 131 [2023-04-01 12:50:48,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:50:48,832 INFO L495 AbstractCegarLoop]: Abstraction has 9858 states and 15038 transitions. [2023-04-01 12:50:48,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:48,832 INFO L276 IsEmpty]: Start isEmpty. Operand 9858 states and 15038 transitions. [2023-04-01 12:50:48,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-04-01 12:50:48,834 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:48,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:50:48,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:50:48,834 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:48,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:48,835 INFO L85 PathProgramCache]: Analyzing trace with hash 348139099, now seen corresponding path program 1 times [2023-04-01 12:50:48,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:48,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645866996] [2023-04-01 12:50:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:48,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:50:51,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:51,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645866996] [2023-04-01 12:50:51,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645866996] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:50:51,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529089362] [2023-04-01 12:50:51,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:51,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:50:51,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:50:51,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:50:51,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:50:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:51,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 12:50:51,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:50:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 12:50:52,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:50:52,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529089362] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:52,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:50:52,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-01 12:50:52,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341053171] [2023-04-01 12:50:52,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:52,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:50:52,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:52,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:50:52,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:50:52,116 INFO L87 Difference]: Start difference. First operand 9858 states and 15038 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:54,474 INFO L93 Difference]: Finished difference Result 29083 states and 44332 transitions. [2023-04-01 12:50:54,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:50:54,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 143 [2023-04-01 12:50:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:54,538 INFO L225 Difference]: With dead ends: 29083 [2023-04-01 12:50:54,538 INFO L226 Difference]: Without dead ends: 19248 [2023-04-01 12:50:54,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:50:54,568 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 1011 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:54,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 721 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:50:54,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19248 states. [2023-04-01 12:50:56,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19248 to 19246. [2023-04-01 12:50:56,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19246 states, 19242 states have (on average 1.519176800748363) internal successors, (29232), 19242 states have internal predecessors, (29232), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19246 states to 19246 states and 29235 transitions. [2023-04-01 12:50:56,345 INFO L78 Accepts]: Start accepts. Automaton has 19246 states and 29235 transitions. Word has length 143 [2023-04-01 12:50:56,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:50:56,345 INFO L495 AbstractCegarLoop]: Abstraction has 19246 states and 29235 transitions. [2023-04-01 12:50:56,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:56,346 INFO L276 IsEmpty]: Start isEmpty. Operand 19246 states and 29235 transitions. [2023-04-01 12:50:56,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-04-01 12:50:56,348 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:56,348 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:50:56,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 12:50:56,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 12:50:56,558 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:56,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:56,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1357810605, now seen corresponding path program 1 times [2023-04-01 12:50:56,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:56,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068006007] [2023-04-01 12:50:56,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:56,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 12:50:56,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:56,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068006007] [2023-04-01 12:50:56,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068006007] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:56,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:50:56,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:50:56,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021624782] [2023-04-01 12:50:56,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:56,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:50:56,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:56,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:50:56,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:56,688 INFO L87 Difference]: Start difference. First operand 19246 states and 29235 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:58,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:58,897 INFO L93 Difference]: Finished difference Result 44421 states and 67660 transitions. [2023-04-01 12:50:58,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:50:58,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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 144 [2023-04-01 12:50:58,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:58,991 INFO L225 Difference]: With dead ends: 44421 [2023-04-01 12:50:58,991 INFO L226 Difference]: Without dead ends: 25539 [2023-04-01 12:50:59,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:59,035 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 150 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:59,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 718 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:50:59,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25539 states. [2023-04-01 12:51:01,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25539 to 25537. [2023-04-01 12:51:01,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25537 states, 25533 states have (on average 1.507813417929738) internal successors, (38499), 25533 states have internal predecessors, (38499), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:51:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25537 states to 25537 states and 38502 transitions. [2023-04-01 12:51:01,707 INFO L78 Accepts]: Start accepts. Automaton has 25537 states and 38502 transitions. Word has length 144 [2023-04-01 12:51:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:51:01,707 INFO L495 AbstractCegarLoop]: Abstraction has 25537 states and 38502 transitions. [2023-04-01 12:51:01,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:51:01,708 INFO L276 IsEmpty]: Start isEmpty. Operand 25537 states and 38502 transitions. [2023-04-01 12:51:01,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 12:51:01,710 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:51:01,710 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:51:01,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:51:01,710 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:51:01,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:51:01,711 INFO L85 PathProgramCache]: Analyzing trace with hash 944259736, now seen corresponding path program 1 times [2023-04-01 12:51:01,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:51:01,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331569183] [2023-04-01 12:51:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:51:01,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:51:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:51:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 12:51:01,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:51:01,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331569183] [2023-04-01 12:51:01,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331569183] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:51:01,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:51:01,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:51:01,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746757239] [2023-04-01 12:51:01,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:51:01,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:51:01,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:51:01,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:51:01,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:51:01,829 INFO L87 Difference]: Start difference. First operand 25537 states and 38502 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:51:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:51:06,244 INFO L93 Difference]: Finished difference Result 74977 states and 112902 transitions. [2023-04-01 12:51:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:51:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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 145 [2023-04-01 12:51:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:51:06,412 INFO L225 Difference]: With dead ends: 74977 [2023-04-01 12:51:06,412 INFO L226 Difference]: Without dead ends: 49559 [2023-04-01 12:51:06,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:51:06,473 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 268 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:51:06,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1033 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:51:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49559 states. [2023-04-01 12:51:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49559 to 49557. [2023-04-01 12:51:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49557 states, 49553 states have (on average 1.4991625128650132) internal successors, (74288), 49553 states have internal predecessors, (74288), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:51:11,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49557 states to 49557 states and 74291 transitions. [2023-04-01 12:51:11,774 INFO L78 Accepts]: Start accepts. Automaton has 49557 states and 74291 transitions. Word has length 145 [2023-04-01 12:51:11,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:51:11,775 INFO L495 AbstractCegarLoop]: Abstraction has 49557 states and 74291 transitions. [2023-04-01 12:51:11,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:51:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand 49557 states and 74291 transitions. [2023-04-01 12:51:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 12:51:11,779 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:51:11,779 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:51:11,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 12:51:11,780 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:51:11,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:51:11,780 INFO L85 PathProgramCache]: Analyzing trace with hash 295082936, now seen corresponding path program 1 times [2023-04-01 12:51:11,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:51:11,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525173202] [2023-04-01 12:51:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:51:11,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:51:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:51:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 12:51:11,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:51:11,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525173202] [2023-04-01 12:51:11,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525173202] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:51:11,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:51:11,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:51:11,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264266309] [2023-04-01 12:51:11,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:51:11,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:51:11,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:51:11,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:51:11,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:51:11,887 INFO L87 Difference]: Start difference. First operand 49557 states and 74291 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:51:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:51:21,282 INFO L93 Difference]: Finished difference Result 148553 states and 222691 transitions. [2023-04-01 12:51:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:51:21,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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 145 [2023-04-01 12:51:21,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:51:21,728 INFO L225 Difference]: With dead ends: 148553 [2023-04-01 12:51:21,728 INFO L226 Difference]: Without dead ends: 99043 [2023-04-01 12:51:21,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:51:21,809 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 358 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:51:21,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 725 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:51:21,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99043 states.