/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/Problem13_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:24:19,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:24:19,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:24:19,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:24:19,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:24:19,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:24:19,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:24:19,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:24:19,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:24:19,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:24:19,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:24:19,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:24:19,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:24:19,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:24:19,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:24:19,646 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:24:19,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:24:19,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:24:19,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:24:19,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:24:19,658 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 23:24:19,675 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:24:19,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:24:19,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:24:19,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:24:19,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:24:19,677 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:24:19,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:24:19,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:24:19,678 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:24:19,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:24:19,678 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:24:19,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:24:19,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:24:19,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:24:19,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:24:19,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:24:19,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:24:19,680 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:24:19,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:24:19,680 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:24:19,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:24:19,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:24:19,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:24:19,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:24:19,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:24:19,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:24:19,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:24:19,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:24:19,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:24:19,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:24:19,682 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:24:19,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:24:19,682 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:24:19,683 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:24:19,683 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:24:19,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:24:19,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:24:19,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:24:19,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:24:19,936 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:24:19,936 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:24:19,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label24.c [2023-03-30 23:24:21,117 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:24:21,547 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:24:21,547 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label24.c [2023-03-30 23:24:21,577 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe47a06e/bc1368bbcbb84739a1ebb15bc839f2c1/FLAG658a48d71 [2023-03-30 23:24:21,698 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe47a06e/bc1368bbcbb84739a1ebb15bc839f2c1 [2023-03-30 23:24:21,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:24:21,701 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:24:21,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:24:21,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:24:21,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:24:21,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:24:21" (1/1) ... [2023-03-30 23:24:21,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@326f06fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:21, skipping insertion in model container [2023-03-30 23:24:21,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:24:21" (1/1) ... [2023-03-30 23:24:21,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:24:21,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:24:22,104 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/Problem13_label24.c[4341,4354] [2023-03-30 23:24:22,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:24:22,923 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:24:22,949 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/Problem13_label24.c[4341,4354] [2023-03-30 23:24:23,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:24:23,447 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:24:23,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:23 WrapperNode [2023-03-30 23:24:23,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:24:23,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:24:23,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:24:23,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:24:23,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:23" (1/1) ... [2023-03-30 23:24:23,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:23" (1/1) ... [2023-03-30 23:24:23,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:23" (1/1) ... [2023-03-30 23:24:23,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:23" (1/1) ... [2023-03-30 23:24:23,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:23" (1/1) ... [2023-03-30 23:24:23,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:23" (1/1) ... [2023-03-30 23:24:23,706 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:23" (1/1) ... [2023-03-30 23:24:23,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:23" (1/1) ... [2023-03-30 23:24:23,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:24:23,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:24:23,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:24:23,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:24:23,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:23" (1/1) ... [2023-03-30 23:24:23,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:24:23,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:24:23,862 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 23:24:23,884 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 23:24:23,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:24:23,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:24:23,901 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:24:23,901 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:24:23,901 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:24:23,901 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:24:23,901 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:24:23,902 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:24:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:24:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:24:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:24:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:24:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:24:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:24:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:24:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:24:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:24:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:24:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:24:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:24:23,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:24:23,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:24:23,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:24:23,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:24:23,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:24:23,985 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:24:23,987 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:24:28,744 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:24:28,764 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:24:28,764 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:24:28,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:24:28 BoogieIcfgContainer [2023-03-30 23:24:28,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:24:28,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:24:28,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:24:28,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:24:28,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:24:21" (1/3) ... [2023-03-30 23:24:28,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59721a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:24:28, skipping insertion in model container [2023-03-30 23:24:28,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:23" (2/3) ... [2023-03-30 23:24:28,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59721a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:24:28, skipping insertion in model container [2023-03-30 23:24:28,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:24:28" (3/3) ... [2023-03-30 23:24:28,780 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label24.c [2023-03-30 23:24:28,795 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:24:28,795 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:24:28,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:24:28,874 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;@4d143073, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:24:28,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:24:28,884 INFO L276 IsEmpty]: Start isEmpty. Operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 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 23:24:28,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-30 23:24:28,892 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:28,893 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] [2023-03-30 23:24:28,894 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:28,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:28,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1888607188, now seen corresponding path program 1 times [2023-03-30 23:24:28,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:28,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924487927] [2023-03-30 23:24:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:28,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:29,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:29,371 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 23:24:29,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:29,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924487927] [2023-03-30 23:24:29,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924487927] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:24:29,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:24:29,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:24:29,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609207119] [2023-03-30 23:24:29,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:24:29,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:24:29,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:29,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:24:29,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:24:29,417 INFO L87 Difference]: Start difference. First operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 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 5 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 23:24:38,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:24:38,095 INFO L93 Difference]: Finished difference Result 3970 states and 7414 transitions. [2023-03-30 23:24:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:24:38,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 35 [2023-03-30 23:24:38,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:24:38,133 INFO L225 Difference]: With dead ends: 3970 [2023-03-30 23:24:38,134 INFO L226 Difference]: Without dead ends: 2783 [2023-03-30 23:24:38,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:24:38,150 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 5709 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 5250 mSolverCounterSat, 2383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5709 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 7633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2383 IncrementalHoareTripleChecker+Valid, 5250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:24:38,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5709 Valid, 348 Invalid, 7633 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2383 Valid, 5250 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2023-03-30 23:24:38,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2023-03-30 23:24:38,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2758. [2023-03-30 23:24:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2758 states, 2718 states have (on average 1.599337748344371) internal successors, (4347), 2721 states have internal predecessors, (4347), 14 states have call successors, (14), 14 states have call predecessors, (14), 25 states have return successors, (52), 22 states have call predecessors, (52), 13 states have call successors, (52) [2023-03-30 23:24:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2758 states to 2758 states and 4413 transitions. [2023-03-30 23:24:38,367 INFO L78 Accepts]: Start accepts. Automaton has 2758 states and 4413 transitions. Word has length 35 [2023-03-30 23:24:38,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:24:38,369 INFO L495 AbstractCegarLoop]: Abstraction has 2758 states and 4413 transitions. [2023-03-30 23:24:38,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 23:24:38,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2758 states and 4413 transitions. [2023-03-30 23:24:38,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-03-30 23:24:38,379 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:38,380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:24:38,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:24:38,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:38,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:38,382 INFO L85 PathProgramCache]: Analyzing trace with hash -171072708, now seen corresponding path program 1 times [2023-03-30 23:24:38,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:38,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614905945] [2023-03-30 23:24:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:38,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:38,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:38,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:24:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:39,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:39,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614905945] [2023-03-30 23:24:39,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614905945] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:24:39,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:24:39,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:24:39,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212695733] [2023-03-30 23:24:39,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:24:39,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:24:39,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:39,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:24:39,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:24:39,017 INFO L87 Difference]: Start difference. First operand 2758 states and 4413 transitions. Second operand has 8 states, 7 states have (on average 17.0) internal successors, (119), 5 states have internal predecessors, (119), 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 23:24:46,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:24:46,064 INFO L93 Difference]: Finished difference Result 8172 states and 13340 transitions. [2023-03-30 23:24:46,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:24:46,066 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.0) internal successors, (119), 5 states have internal predecessors, (119), 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 125 [2023-03-30 23:24:46,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:24:46,105 INFO L225 Difference]: With dead ends: 8172 [2023-03-30 23:24:46,106 INFO L226 Difference]: Without dead ends: 5420 [2023-03-30 23:24:46,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:24:46,124 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 3388 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 7216 mSolverCounterSat, 1076 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3388 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 8292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1076 IncrementalHoareTripleChecker+Valid, 7216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:24:46,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3388 Valid, 792 Invalid, 8292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1076 Valid, 7216 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-03-30 23:24:46,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5420 states. [2023-03-30 23:24:46,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5420 to 5337. [2023-03-30 23:24:46,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5337 states, 5221 states have (on average 1.4443593181382877) internal successors, (7541), 5243 states have internal predecessors, (7541), 26 states have call successors, (26), 26 states have call predecessors, (26), 89 states have return successors, (274), 67 states have call predecessors, (274), 25 states have call successors, (274) [2023-03-30 23:24:46,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5337 states to 5337 states and 7841 transitions. [2023-03-30 23:24:46,339 INFO L78 Accepts]: Start accepts. Automaton has 5337 states and 7841 transitions. Word has length 125 [2023-03-30 23:24:46,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:24:46,341 INFO L495 AbstractCegarLoop]: Abstraction has 5337 states and 7841 transitions. [2023-03-30 23:24:46,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.0) internal successors, (119), 5 states have internal predecessors, (119), 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 23:24:46,341 INFO L276 IsEmpty]: Start isEmpty. Operand 5337 states and 7841 transitions. [2023-03-30 23:24:46,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-03-30 23:24:46,348 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:46,348 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:24:46,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:24:46,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:46,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:46,349 INFO L85 PathProgramCache]: Analyzing trace with hash 950324535, now seen corresponding path program 1 times [2023-03-30 23:24:46,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:46,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409131105] [2023-03-30 23:24:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:46,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:46,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:46,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:24:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 23:24:46,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:46,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409131105] [2023-03-30 23:24:46,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409131105] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:24:46,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571019752] [2023-03-30 23:24:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:46,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:24:46,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:24:46,755 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 23:24:46,774 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 23:24:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:46,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-30 23:24:46,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:24:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:47,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:24:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:47,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571019752] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 23:24:47,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:24:47,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 14 [2023-03-30 23:24:47,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007844204] [2023-03-30 23:24:47,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:24:47,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 23:24:47,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:47,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 23:24:47,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-03-30 23:24:47,548 INFO L87 Difference]: Start difference. First operand 5337 states and 7841 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 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 23:24:55,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:24:55,183 INFO L93 Difference]: Finished difference Result 20881 states and 32206 transitions. [2023-03-30 23:24:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:24:55,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 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 135 [2023-03-30 23:24:55,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:24:55,272 INFO L225 Difference]: With dead ends: 20881 [2023-03-30 23:24:55,273 INFO L226 Difference]: Without dead ends: 15550 [2023-03-30 23:24:55,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-03-30 23:24:55,291 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 5090 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 5140 mSolverCounterSat, 4550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5090 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 9690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4550 IncrementalHoareTripleChecker+Valid, 5140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:24:55,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5090 Valid, 378 Invalid, 9690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4550 Valid, 5140 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-03-30 23:24:55,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15550 states. [2023-03-30 23:24:55,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15550 to 15422. [2023-03-30 23:24:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15422 states, 15065 states have (on average 1.406173249253236) internal successors, (21184), 15134 states have internal predecessors, (21184), 74 states have call successors, (74), 74 states have call predecessors, (74), 282 states have return successors, (2012), 213 states have call predecessors, (2012), 73 states have call successors, (2012) [2023-03-30 23:24:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15422 states to 15422 states and 23270 transitions. [2023-03-30 23:24:55,707 INFO L78 Accepts]: Start accepts. Automaton has 15422 states and 23270 transitions. Word has length 135 [2023-03-30 23:24:55,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:24:55,708 INFO L495 AbstractCegarLoop]: Abstraction has 15422 states and 23270 transitions. [2023-03-30 23:24:55,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 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 23:24:55,709 INFO L276 IsEmpty]: Start isEmpty. Operand 15422 states and 23270 transitions. [2023-03-30 23:24:55,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-03-30 23:24:55,711 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:55,711 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:24:55,724 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 23:24:55,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:24:55,917 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:55,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:55,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1691118059, now seen corresponding path program 1 times [2023-03-30 23:24:55,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:55,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108043817] [2023-03-30 23:24:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:55,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:56,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:56,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:24:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:56,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:56,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108043817] [2023-03-30 23:24:56,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108043817] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:24:56,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354907811] [2023-03-30 23:24:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:56,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:24:56,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:24:56,173 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 23:24:56,176 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 23:24:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:56,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:24:56,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:24:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:56,330 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:24:56,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354907811] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:24:56,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:24:56,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:24:56,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743922493] [2023-03-30 23:24:56,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:24:56,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:24:56,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:56,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:24:56,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:24:56,337 INFO L87 Difference]: Start difference. First operand 15422 states and 23270 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 23:24:59,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:24:59,703 INFO L93 Difference]: Finished difference Result 45607 states and 72149 transitions. [2023-03-30 23:24:59,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:24:59,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 155 [2023-03-30 23:24:59,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:24:59,855 INFO L225 Difference]: With dead ends: 45607 [2023-03-30 23:24:59,855 INFO L226 Difference]: Without dead ends: 30191 [2023-03-30 23:24:59,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 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 23:24:59,905 INFO L413 NwaCegarLoop]: 1550 mSDtfsCounter, 1116 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2529 mSolverCounterSat, 739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 3268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 739 IncrementalHoareTripleChecker+Valid, 2529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:24:59,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 1657 Invalid, 3268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [739 Valid, 2529 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-03-30 23:24:59,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30191 states. [2023-03-30 23:25:00,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30191 to 30182. [2023-03-30 23:25:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30182 states, 29564 states have (on average 1.3516438912190503) internal successors, (39960), 29676 states have internal predecessors, (39960), 146 states have call successors, (146), 146 states have call predecessors, (146), 471 states have return successors, (5754), 359 states have call predecessors, (5754), 145 states have call successors, (5754) [2023-03-30 23:25:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30182 states to 30182 states and 45860 transitions. [2023-03-30 23:25:00,864 INFO L78 Accepts]: Start accepts. Automaton has 30182 states and 45860 transitions. Word has length 155 [2023-03-30 23:25:00,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:25:00,865 INFO L495 AbstractCegarLoop]: Abstraction has 30182 states and 45860 transitions. [2023-03-30 23:25:00,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 23:25:00,865 INFO L276 IsEmpty]: Start isEmpty. Operand 30182 states and 45860 transitions. [2023-03-30 23:25:00,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-03-30 23:25:00,872 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:25:00,872 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:25:00,881 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 23:25:01,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 23:25:01,078 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:25:01,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:25:01,079 INFO L85 PathProgramCache]: Analyzing trace with hash 391269853, now seen corresponding path program 1 times [2023-03-30 23:25:01,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:25:01,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243788169] [2023-03-30 23:25:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:01,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:25:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:01,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:25:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:01,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:25:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:25:01,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:25:01,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243788169] [2023-03-30 23:25:01,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243788169] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:25:01,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:25:01,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:25:01,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936438107] [2023-03-30 23:25:01,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:25:01,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 23:25:01,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:25:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 23:25:01,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:25:01,651 INFO L87 Difference]: Start difference. First operand 30182 states and 45860 transitions. Second operand has 6 states, 6 states have (on average 40.333333333333336) internal successors, (242), 4 states have internal predecessors, (242), 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 23:25:08,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:25:08,799 INFO L93 Difference]: Finished difference Result 79222 states and 121766 transitions. [2023-03-30 23:25:08,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:25:08,799 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.333333333333336) internal successors, (242), 4 states have internal predecessors, (242), 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 248 [2023-03-30 23:25:08,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:25:09,059 INFO L225 Difference]: With dead ends: 79222 [2023-03-30 23:25:09,059 INFO L226 Difference]: Without dead ends: 49046 [2023-03-30 23:25:09,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-30 23:25:09,114 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 5962 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 5939 mSolverCounterSat, 799 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5962 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 6738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 799 IncrementalHoareTripleChecker+Valid, 5939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:25:09,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5962 Valid, 422 Invalid, 6738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [799 Valid, 5939 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-03-30 23:25:09,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49046 states. [2023-03-30 23:25:10,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49046 to 48962. [2023-03-30 23:25:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48962 states, 48063 states have (on average 1.3360173106131537) internal successors, (64213), 48215 states have internal predecessors, (64213), 238 states have call successors, (238), 238 states have call predecessors, (238), 660 states have return successors, (10232), 508 states have call predecessors, (10232), 237 states have call successors, (10232) [2023-03-30 23:25:10,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48962 states to 48962 states and 74683 transitions. [2023-03-30 23:25:10,284 INFO L78 Accepts]: Start accepts. Automaton has 48962 states and 74683 transitions. Word has length 248 [2023-03-30 23:25:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:25:10,286 INFO L495 AbstractCegarLoop]: Abstraction has 48962 states and 74683 transitions. [2023-03-30 23:25:10,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.333333333333336) internal successors, (242), 4 states have internal predecessors, (242), 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 23:25:10,286 INFO L276 IsEmpty]: Start isEmpty. Operand 48962 states and 74683 transitions. [2023-03-30 23:25:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-03-30 23:25:10,296 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:25:10,296 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, 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, 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] [2023-03-30 23:25:10,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-30 23:25:10,297 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:25:10,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:25:10,297 INFO L85 PathProgramCache]: Analyzing trace with hash 185646731, now seen corresponding path program 1 times [2023-03-30 23:25:10,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:25:10,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263539390] [2023-03-30 23:25:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:10,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:25:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:10,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:25:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:10,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:25:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:10,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-03-30 23:25:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 56 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 23:25:11,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:25:11,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263539390] [2023-03-30 23:25:11,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263539390] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:25:11,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628438673] [2023-03-30 23:25:11,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:11,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:11,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:25:11,109 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 23:25:11,111 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 23:25:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:11,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 23:25:11,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:25:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-03-30 23:25:11,363 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:25:11,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628438673] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:25:11,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:25:11,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-30 23:25:11,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061536290] [2023-03-30 23:25:11,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:25:11,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:25:11,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:25:11,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:25:11,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:25:11,366 INFO L87 Difference]: Start difference. First operand 48962 states and 74683 transitions. Second operand has 5 states, 5 states have (on average 46.0) internal successors, (230), 4 states have internal predecessors, (230), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)