/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem12_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:20:46,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:20:46,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:20:46,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:20:46,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:20:46,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:20:46,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:20:46,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:20:46,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:20:46,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:20:46,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:20:46,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:20:46,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:20:46,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:20:46,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:20:46,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:20:46,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:20:46,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:20:46,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:20:46,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:20:46,707 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:20:46,736 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:20:46,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:20:46,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:20:46,737 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:20:46,738 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:20:46,738 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:20:46,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:20:46,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:20:46,739 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:20:46,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:20:46,740 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:20:46,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:20:46,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:20:46,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:20:46,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:20:46,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:20:46,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:20:46,741 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:20:46,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:20:46,741 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:20:46,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:20:46,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:20:46,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:20:46,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:20:46,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:20:46,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:20:46,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:20:46,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:20:46,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:20:46,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:20:46,743 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:20:46,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:20:46,743 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:20:46,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:20:46,743 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:20:46,744 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:20:46,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:20:47,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:20:47,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:20:47,012 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:20:47,012 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:20:47,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label33.c [2023-03-30 23:20:48,113 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:20:48,546 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:20:48,547 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label33.c [2023-03-30 23:20:48,579 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d2de8f32/7fb1ff02725a42b9900024a52c3e9a5a/FLAG3287bc669 [2023-03-30 23:20:48,593 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d2de8f32/7fb1ff02725a42b9900024a52c3e9a5a [2023-03-30 23:20:48,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:20:48,597 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:20:48,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:20:48,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:20:48,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:20:48,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:20:48" (1/1) ... [2023-03-30 23:20:48,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77ecaa1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:48, skipping insertion in model container [2023-03-30 23:20:48,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:20:48" (1/1) ... [2023-03-30 23:20:48,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:20:48,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:20:48,971 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/eca-rers2012/Problem12_label33.c[6146,6159] [2023-03-30 23:20:49,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:20:49,688 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:20:49,716 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/eca-rers2012/Problem12_label33.c[6146,6159] [2023-03-30 23:20:50,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:20:50,098 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:20:50,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:50 WrapperNode [2023-03-30 23:20:50,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:20:50,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:20:50,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:20:50,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:20:50,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:50" (1/1) ... [2023-03-30 23:20:50,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:50" (1/1) ... [2023-03-30 23:20:50,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:50" (1/1) ... [2023-03-30 23:20:50,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:50" (1/1) ... [2023-03-30 23:20:50,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:50" (1/1) ... [2023-03-30 23:20:50,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:50" (1/1) ... [2023-03-30 23:20:50,293 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:50" (1/1) ... [2023-03-30 23:20:50,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:50" (1/1) ... [2023-03-30 23:20:50,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:20:50,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:20:50,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:20:50,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:20:50,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:50" (1/1) ... [2023-03-30 23:20:50,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:20:50,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:20:50,366 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) [2023-03-30 23:20:50,389 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 [2023-03-30 23:20:50,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:20:50,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:20:50,410 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:20:50,411 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:20:50,411 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:20:50,411 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:20:50,411 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:20:50,411 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:20:50,411 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:20:50,411 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:20:50,411 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:20:50,411 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:20:50,411 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:20:50,411 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:20:50,412 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:20:50,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:20:50,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:20:50,412 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:20:50,412 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:20:50,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:20:50,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:20:50,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:20:50,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:20:50,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:20:50,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:20:50,502 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:20:50,504 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:20:54,316 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:20:54,331 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:20:54,332 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:20:54,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:20:54 BoogieIcfgContainer [2023-03-30 23:20:54,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:20:54,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:20:54,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:20:54,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:20:54,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:20:48" (1/3) ... [2023-03-30 23:20:54,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284198c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:20:54, skipping insertion in model container [2023-03-30 23:20:54,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:50" (2/3) ... [2023-03-30 23:20:54,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284198c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:20:54, skipping insertion in model container [2023-03-30 23:20:54,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:20:54" (3/3) ... [2023-03-30 23:20:54,343 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label33.c [2023-03-30 23:20:54,361 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:20:54,361 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:20:54,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:20:54,428 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=PETRI_NET, 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;@5405ee73, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:20:54,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:20:54,435 INFO L276 IsEmpty]: Start isEmpty. Operand has 839 states, 825 states have (on average 1.907878787878788) internal successors, (1574), 826 states have internal predecessors, (1574), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 23:20:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-03-30 23:20:54,444 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:20:54,445 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] [2023-03-30 23:20:54,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:20:54,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:20:54,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2065857576, now seen corresponding path program 1 times [2023-03-30 23:20:54,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:20:54,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534632319] [2023-03-30 23:20:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:20:54,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:20:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:54,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:20:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:20:54,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:20:54,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534632319] [2023-03-30 23:20:54,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534632319] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:20:54,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:20:54,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:20:55,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025912113] [2023-03-30 23:20:55,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:20:55,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:20:55,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:20:55,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:20:55,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:20:55,045 INFO L87 Difference]: Start difference. First operand has 839 states, 825 states have (on average 1.907878787878788) internal successors, (1574), 826 states have internal predecessors, (1574), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:21:00,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:00,466 INFO L93 Difference]: Finished difference Result 2487 states and 4748 transitions. [2023-03-30 23:21:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:21:00,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-03-30 23:21:00,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:00,490 INFO L225 Difference]: With dead ends: 2487 [2023-03-30 23:21:00,490 INFO L226 Difference]: Without dead ends: 1568 [2023-03-30 23:21:00,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:21:00,505 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2397 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3593 mSolverCounterSat, 716 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2397 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 4309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 716 IncrementalHoareTripleChecker+Valid, 3593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:00,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2397 Valid, 39 Invalid, 4309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [716 Valid, 3593 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-03-30 23:21:00,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2023-03-30 23:21:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1564. [2023-03-30 23:21:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1536 states have (on average 1.5944010416666667) internal successors, (2449), 1538 states have internal predecessors, (2449), 10 states have call successors, (10), 10 states have call predecessors, (10), 17 states have return successors, (25), 15 states have call predecessors, (25), 9 states have call successors, (25) [2023-03-30 23:21:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2484 transitions. [2023-03-30 23:21:00,650 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2484 transitions. Word has length 55 [2023-03-30 23:21:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:00,651 INFO L495 AbstractCegarLoop]: Abstraction has 1564 states and 2484 transitions. [2023-03-30 23:21:00,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:21:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2484 transitions. [2023-03-30 23:21:00,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-03-30 23:21:00,655 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:00,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:21:00,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:21:00,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:00,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:00,657 INFO L85 PathProgramCache]: Analyzing trace with hash 896385959, now seen corresponding path program 1 times [2023-03-30 23:21:00,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:00,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683705400] [2023-03-30 23:21:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:00,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:00,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:00,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:01,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:01,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683705400] [2023-03-30 23:21:01,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683705400] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:01,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:21:01,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:21:01,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967920117] [2023-03-30 23:21:01,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:01,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:21:01,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:01,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:21:01,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:21:01,129 INFO L87 Difference]: Start difference. First operand 1564 states and 2484 transitions. Second operand has 7 states, 6 states have (on average 21.333333333333332) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:21:07,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:07,132 INFO L93 Difference]: Finished difference Result 4768 states and 7606 transitions. [2023-03-30 23:21:07,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 23:21:07,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 21.333333333333332) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 134 [2023-03-30 23:21:07,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:07,148 INFO L225 Difference]: With dead ends: 4768 [2023-03-30 23:21:07,149 INFO L226 Difference]: Without dead ends: 3210 [2023-03-30 23:21:07,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:21:07,154 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 4518 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 5718 mSolverCounterSat, 949 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4518 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 6667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 949 IncrementalHoareTripleChecker+Valid, 5718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:07,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4518 Valid, 112 Invalid, 6667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [949 Valid, 5718 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-03-30 23:21:07,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2023-03-30 23:21:07,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3163. [2023-03-30 23:21:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3095 states have (on average 1.4465266558966074) internal successors, (4477), 3104 states have internal predecessors, (4477), 18 states have call successors, (18), 18 states have call predecessors, (18), 49 states have return successors, (91), 40 states have call predecessors, (91), 17 states have call successors, (91) [2023-03-30 23:21:07,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 4586 transitions. [2023-03-30 23:21:07,271 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 4586 transitions. Word has length 134 [2023-03-30 23:21:07,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:07,273 INFO L495 AbstractCegarLoop]: Abstraction has 3163 states and 4586 transitions. [2023-03-30 23:21:07,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 21.333333333333332) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:21:07,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 4586 transitions. [2023-03-30 23:21:07,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-03-30 23:21:07,283 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:07,284 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:21:07,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:21:07,284 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:07,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:07,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1869086032, now seen corresponding path program 1 times [2023-03-30 23:21:07,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:07,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237288572] [2023-03-30 23:21:07,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:07,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:07,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:07,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:07,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:07,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237288572] [2023-03-30 23:21:07,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237288572] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:07,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:21:07,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:21:07,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576937451] [2023-03-30 23:21:07,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:07,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:21:07,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:07,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:21:07,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:21:07,764 INFO L87 Difference]: Start difference. First operand 3163 states and 4586 transitions. Second operand has 8 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:21:15,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:15,208 INFO L93 Difference]: Finished difference Result 12865 states and 19113 transitions. [2023-03-30 23:21:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:21:15,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 163 [2023-03-30 23:21:15,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:15,253 INFO L225 Difference]: With dead ends: 12865 [2023-03-30 23:21:15,253 INFO L226 Difference]: Without dead ends: 9708 [2023-03-30 23:21:15,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:21:15,263 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6074 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 6720 mSolverCounterSat, 2491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6074 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 9211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2491 IncrementalHoareTripleChecker+Valid, 6720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:15,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6074 Valid, 143 Invalid, 9211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2491 Valid, 6720 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-03-30 23:21:15,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9708 states. [2023-03-30 23:21:15,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9708 to 9631. [2023-03-30 23:21:15,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9631 states, 9375 states have (on average 1.30208) internal successors, (12207), 9424 states have internal predecessors, (12207), 50 states have call successors, (50), 50 states have call predecessors, (50), 205 states have return successors, (652), 156 states have call predecessors, (652), 49 states have call successors, (652) [2023-03-30 23:21:15,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9631 states to 9631 states and 12909 transitions. [2023-03-30 23:21:15,640 INFO L78 Accepts]: Start accepts. Automaton has 9631 states and 12909 transitions. Word has length 163 [2023-03-30 23:21:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:15,642 INFO L495 AbstractCegarLoop]: Abstraction has 9631 states and 12909 transitions. [2023-03-30 23:21:15,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:21:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 9631 states and 12909 transitions. [2023-03-30 23:21:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-03-30 23:21:15,644 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:15,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:21:15,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:21:15,645 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:15,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:15,646 INFO L85 PathProgramCache]: Analyzing trace with hash 325075019, now seen corresponding path program 1 times [2023-03-30 23:21:15,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:15,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53004929] [2023-03-30 23:21:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:15,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:15,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:16,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 23:21:16,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:16,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53004929] [2023-03-30 23:21:16,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53004929] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:21:16,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515011455] [2023-03-30 23:21:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:16,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:16,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:16,129 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) [2023-03-30 23:21:16,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:21:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:16,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:21:16,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:21:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:16,369 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:21:16,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515011455] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:16,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:21:16,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-03-30 23:21:16,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764442328] [2023-03-30 23:21:16,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:16,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:21:16,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:21:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:21:16,371 INFO L87 Difference]: Start difference. First operand 9631 states and 12909 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:21:19,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:19,861 INFO L93 Difference]: Finished difference Result 28732 states and 39610 transitions. [2023-03-30 23:21:19,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:21:19,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 200 [2023-03-30 23:21:19,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:19,936 INFO L225 Difference]: With dead ends: 28732 [2023-03-30 23:21:19,936 INFO L226 Difference]: Without dead ends: 19107 [2023-03-30 23:21:19,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:21:19,962 INFO L413 NwaCegarLoop]: 1475 mSDtfsCounter, 717 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2844 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 1507 SdHoareTripleChecker+Invalid, 3220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 2844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:19,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 1507 Invalid, 3220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 2844 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-30 23:21:19,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19107 states. [2023-03-30 23:21:20,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19107 to 18340. [2023-03-30 23:21:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18340 states, 17893 states have (on average 1.2712792712233834) internal successors, (22747), 17979 states have internal predecessors, (22747), 94 states have call successors, (94), 94 states have call predecessors, (94), 352 states have return successors, (1882), 266 states have call predecessors, (1882), 93 states have call successors, (1882) [2023-03-30 23:21:20,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18340 states to 18340 states and 24723 transitions. [2023-03-30 23:21:20,526 INFO L78 Accepts]: Start accepts. Automaton has 18340 states and 24723 transitions. Word has length 200 [2023-03-30 23:21:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:20,528 INFO L495 AbstractCegarLoop]: Abstraction has 18340 states and 24723 transitions. [2023-03-30 23:21:20,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:21:20,529 INFO L276 IsEmpty]: Start isEmpty. Operand 18340 states and 24723 transitions. [2023-03-30 23:21:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-03-30 23:21:20,532 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:20,532 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:21:20,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:21:20,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:20,738 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:20,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:20,739 INFO L85 PathProgramCache]: Analyzing trace with hash -982566272, now seen corresponding path program 1 times [2023-03-30 23:21:20,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:20,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566923137] [2023-03-30 23:21:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:20,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:20,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:20,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:21,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:21,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566923137] [2023-03-30 23:21:21,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566923137] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:21:21,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153736327] [2023-03-30 23:21:21,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:21,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:21,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:21,074 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:21:21,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:21:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:21,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:21:21,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:21:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:21,284 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:21:21,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153736327] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:21,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:21:21,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:21:21,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109348764] [2023-03-30 23:21:21,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:21,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:21:21,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:21,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:21:21,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:21,287 INFO L87 Difference]: Start difference. First operand 18340 states and 24723 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:21:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:24,336 INFO L93 Difference]: Finished difference Result 52301 states and 72735 transitions. [2023-03-30 23:21:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:21:24,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 203 [2023-03-30 23:21:24,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:24,458 INFO L225 Difference]: With dead ends: 52301 [2023-03-30 23:21:24,459 INFO L226 Difference]: Without dead ends: 33967 [2023-03-30 23:21:24,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:24,502 INFO L413 NwaCegarLoop]: 1333 mSDtfsCounter, 788 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2163 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 2163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:24,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 1365 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 2163 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-03-30 23:21:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33967 states. [2023-03-30 23:21:25,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33967 to 33200. [2023-03-30 23:21:25,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33200 states, 32491 states have (on average 1.2020251762026408) internal successors, (39055), 32620 states have internal predecessors, (39055), 170 states have call successors, (170), 170 states have call predecessors, (170), 538 states have return successors, (3937), 409 states have call predecessors, (3937), 169 states have call successors, (3937) [2023-03-30 23:21:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33200 states to 33200 states and 43162 transitions. [2023-03-30 23:21:25,370 INFO L78 Accepts]: Start accepts. Automaton has 33200 states and 43162 transitions. Word has length 203 [2023-03-30 23:21:25,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:25,371 INFO L495 AbstractCegarLoop]: Abstraction has 33200 states and 43162 transitions. [2023-03-30 23:21:25,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:21:25,371 INFO L276 IsEmpty]: Start isEmpty. Operand 33200 states and 43162 transitions. [2023-03-30 23:21:25,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-03-30 23:21:25,374 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:25,374 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:21:25,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:21:25,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:25,581 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:25,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:25,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1715619987, now seen corresponding path program 1 times [2023-03-30 23:21:25,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:25,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768075011] [2023-03-30 23:21:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:25,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:25,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:25,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 23:21:26,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:26,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768075011] [2023-03-30 23:21:26,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768075011] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:21:26,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290133728] [2023-03-30 23:21:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:26,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:26,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:26,082 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:21:26,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:21:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:26,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:21:26,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:21:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:26,256 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:21:26,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290133728] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:26,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:21:26,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-03-30 23:21:26,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158182817] [2023-03-30 23:21:26,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:26,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:21:26,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:21:26,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:21:26,263 INFO L87 Difference]: Start difference. First operand 33200 states and 43162 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:21:29,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:29,654 INFO L93 Difference]: Finished difference Result 82781 states and 110282 transitions. [2023-03-30 23:21:29,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:21:29,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 204 [2023-03-30 23:21:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:29,846 INFO L225 Difference]: With dead ends: 82781 [2023-03-30 23:21:29,847 INFO L226 Difference]: Without dead ends: 49587 [2023-03-30 23:21:29,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:21:29,905 INFO L413 NwaCegarLoop]: 1388 mSDtfsCounter, 727 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:29,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 1420 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-30 23:21:29,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49587 states. [2023-03-30 23:21:30,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49587 to 47286. [2023-03-30 23:21:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47286 states, 46325 states have (on average 1.1988127361036158) internal successors, (55535), 46498 states have internal predecessors, (55535), 242 states have call successors, (242), 242 states have call predecessors, (242), 718 states have return successors, (6912), 545 states have call predecessors, (6912), 241 states have call successors, (6912) [2023-03-30 23:21:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47286 states to 47286 states and 62689 transitions. [2023-03-30 23:21:30,995 INFO L78 Accepts]: Start accepts. Automaton has 47286 states and 62689 transitions. Word has length 204 [2023-03-30 23:21:30,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:30,996 INFO L495 AbstractCegarLoop]: Abstraction has 47286 states and 62689 transitions. [2023-03-30 23:21:30,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:21:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 47286 states and 62689 transitions. [2023-03-30 23:21:31,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-03-30 23:21:31,001 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:31,001 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:21:31,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 23:21:31,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:31,212 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:31,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:31,213 INFO L85 PathProgramCache]: Analyzing trace with hash -740322925, now seen corresponding path program 1 times [2023-03-30 23:21:31,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:31,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729598589] [2023-03-30 23:21:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:31,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:31,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:31,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:31,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-03-30 23:21:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-03-30 23:21:31,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:31,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729598589] [2023-03-30 23:21:31,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729598589] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:21:31,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391828867] [2023-03-30 23:21:31,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:31,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:31,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:31,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:21:31,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:21:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:31,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:21:31,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:21:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-03-30 23:21:31,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:21:31,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391828867] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:31,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:21:31,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:21:31,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969566489] [2023-03-30 23:21:31,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:31,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:21:31,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:31,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:21:31,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:31,931 INFO L87 Difference]: Start difference. First operand 47286 states and 62689 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:21:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:35,341 INFO L93 Difference]: Finished difference Result 117908 states and 161877 transitions. [2023-03-30 23:21:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:21:35,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 276 [2023-03-30 23:21:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:35,697 INFO L225 Difference]: With dead ends: 117908 [2023-03-30 23:21:35,697 INFO L226 Difference]: Without dead ends: 70628 [2023-03-30 23:21:35,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:35,751 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 846 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:35,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 1202 Invalid, 2975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-03-30 23:21:35,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70628 states. [2023-03-30 23:21:37,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70628 to 66783. [2023-03-30 23:21:37,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66783 states, 65496 states have (on average 1.2019054598754122) internal successors, (78720), 65725 states have internal predecessors, (78720), 342 states have call successors, (342), 342 states have call predecessors, (342), 944 states have return successors, (11778), 715 states have call predecessors, (11778), 341 states have call successors, (11778) [2023-03-30 23:21:37,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66783 states to 66783 states and 90840 transitions. [2023-03-30 23:21:37,416 INFO L78 Accepts]: Start accepts. Automaton has 66783 states and 90840 transitions. Word has length 276 [2023-03-30 23:21:37,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:37,416 INFO L495 AbstractCegarLoop]: Abstraction has 66783 states and 90840 transitions. [2023-03-30 23:21:37,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:21:37,417 INFO L276 IsEmpty]: Start isEmpty. Operand 66783 states and 90840 transitions. [2023-03-30 23:21:37,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-03-30 23:21:37,423 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:37,423 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:21:37,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 23:21:37,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:37,630 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:37,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:37,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1343139031, now seen corresponding path program 1 times [2023-03-30 23:21:37,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:37,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655336811] [2023-03-30 23:21:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:37,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:38,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:38,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:38,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-03-30 23:21:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 184 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:21:38,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:38,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655336811] [2023-03-30 23:21:38,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655336811] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:21:38,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734399156] [2023-03-30 23:21:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:38,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:38,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:38,299 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:21:38,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:21:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:38,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:21:38,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:21:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:38,549 INFO L327 TraceCheckSpWp]: Computing backward predicates...