/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_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:36:12,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:36:12,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:36:12,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 22:36:12,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 22:36:12,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 22:36:12,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 22:36:12,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 22:36:12,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 22:36:12,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 22:36:12,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 22:36:12,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 22:36:12,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 22:36:12,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 22:36:12,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 22:36:12,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 22:36:12,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 22:36:12,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 22:36:12,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 22:36:12,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 22:36:12,916 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 [2023-04-01 22:36:12,928 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:36:12,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:36:12,929 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:36:12,929 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:36:12,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:36:12,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:36:12,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:36:12,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:36:12,930 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:36:12,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:36:12,930 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:36:12,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:36:12,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:36:12,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:36:12,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:36:12,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:36:12,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:36:12,931 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:36:12,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:36:12,931 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:36:12,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:36:12,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:36:12,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:36:12,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:36:12,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:36:12,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:36:12,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:36:12,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:36:12,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:36:12,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:36:12,932 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:36:12,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:36:12,932 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:36:12,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:36:12,932 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:36:12,932 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:36:13,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:36:13,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:36:13,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:36:13,112 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:36:13,114 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:36:13,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label03.c [2023-04-01 22:36:14,057 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:36:14,375 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:36:14,375 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label03.c [2023-04-01 22:36:14,400 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/172f9b278/421e152221f644e68ccda09f56a3e021/FLAGff9c94804 [2023-04-01 22:36:14,625 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/172f9b278/421e152221f644e68ccda09f56a3e021 [2023-04-01 22:36:14,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:36:14,628 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:36:14,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:36:14,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:36:14,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:36:14,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:36:14" (1/1) ... [2023-04-01 22:36:14,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@494c77f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:14, skipping insertion in model container [2023-04-01 22:36:14,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:36:14" (1/1) ... [2023-04-01 22:36:14,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:36:14,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:36:14,953 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_label03.c[5036,5049] [2023-04-01 22:36:15,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:36:15,461 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:36:15,482 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_label03.c[5036,5049] [2023-04-01 22:36:15,791 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:36:15,808 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:36:15,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:15 WrapperNode [2023-04-01 22:36:15,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:36:15,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:36:15,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:36:15,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:36:15,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:15" (1/1) ... [2023-04-01 22:36:15,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:15" (1/1) ... [2023-04-01 22:36:15,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:15" (1/1) ... [2023-04-01 22:36:15,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:15" (1/1) ... [2023-04-01 22:36:15,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:15" (1/1) ... [2023-04-01 22:36:15,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:15" (1/1) ... [2023-04-01 22:36:16,004 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:15" (1/1) ... [2023-04-01 22:36:16,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:15" (1/1) ... [2023-04-01 22:36:16,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:36:16,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:36:16,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:36:16,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:36:16,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:15" (1/1) ... [2023-04-01 22:36:16,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:36:16,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:36:16,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 22:36:16,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 22:36:16,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:36:16,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:36:16,105 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:36:16,106 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:36:16,106 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:36:16,106 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 22:36:16,106 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 22:36:16,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:36:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:36:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:36:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 22:36:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 22:36:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:36:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:36:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:36:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:36:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:36:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:36:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:36:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:36:16,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:36:16,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:36:16,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:36:16,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:36:16,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:36:16,173 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:36:16,174 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:36:19,812 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:36:19,822 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:36:19,822 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:36:19,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:36:19 BoogieIcfgContainer [2023-04-01 22:36:19,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:36:19,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:36:19,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:36:19,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:36:19,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:36:14" (1/3) ... [2023-04-01 22:36:19,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20316e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:36:19, skipping insertion in model container [2023-04-01 22:36:19,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:15" (2/3) ... [2023-04-01 22:36:19,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20316e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:36:19, skipping insertion in model container [2023-04-01 22:36:19,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:36:19" (3/3) ... [2023-04-01 22:36:19,829 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label03.c [2023-04-01 22:36:19,841 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:36:19,841 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:36:19,884 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:36:19,888 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;@4a262f24, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:36:19,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:36:19,894 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) [2023-04-01 22:36:19,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 22:36:19,900 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:36:19,900 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] [2023-04-01 22:36:19,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:36:19,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:36:19,904 INFO L85 PathProgramCache]: Analyzing trace with hash -397279655, now seen corresponding path program 1 times [2023-04-01 22:36:19,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:36:19,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556213859] [2023-04-01 22:36:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:19,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:36:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:20,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:36:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:36:20,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:36:20,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556213859] [2023-04-01 22:36:20,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556213859] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:36:20,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:36:20,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 22:36:20,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069194114] [2023-04-01 22:36:20,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:36:20,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:36:20,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:36:20,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:36:20,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:36:20,316 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 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2023-04-01 22:36:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:36:27,568 INFO L93 Difference]: Finished difference Result 3970 states and 7414 transitions. [2023-04-01 22:36:27,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:36:27,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 40 [2023-04-01 22:36:27,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:36:27,596 INFO L225 Difference]: With dead ends: 3970 [2023-04-01 22:36:27,597 INFO L226 Difference]: Without dead ends: 2783 [2023-04-01 22:36:27,607 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 [2023-04-01 22:36:27,611 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 5699 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 5250 mSolverCounterSat, 2383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5699 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 7633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2383 IncrementalHoareTripleChecker+Valid, 5250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:36:27,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5699 Valid, 348 Invalid, 7633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2383 Valid, 5250 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-04-01 22:36:27,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2023-04-01 22:36:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2758. [2023-04-01 22:36:27,745 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) [2023-04-01 22:36:27,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2758 states to 2758 states and 4413 transitions. [2023-04-01 22:36:27,756 INFO L78 Accepts]: Start accepts. Automaton has 2758 states and 4413 transitions. Word has length 40 [2023-04-01 22:36:27,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:36:27,758 INFO L495 AbstractCegarLoop]: Abstraction has 2758 states and 4413 transitions. [2023-04-01 22:36:27,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2023-04-01 22:36:27,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2758 states and 4413 transitions. [2023-04-01 22:36:27,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-01 22:36:27,766 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:36:27,767 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:36:27,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:36:27,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:36:27,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:36:27,768 INFO L85 PathProgramCache]: Analyzing trace with hash -941110352, now seen corresponding path program 1 times [2023-04-01 22:36:27,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:36:27,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111920999] [2023-04-01 22:36:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:27,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:36:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:28,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:36:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:28,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:36:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:36:28,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:36:28,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111920999] [2023-04-01 22:36:28,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111920999] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:36:28,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:36:28,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 22:36:28,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754107676] [2023-04-01 22:36:28,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:36:28,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:36:28,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:36:28,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:36:28,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:36:28,237 INFO L87 Difference]: Start difference. First operand 2758 states and 4413 transitions. Second operand has 8 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2023-04-01 22:36:34,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:36:34,445 INFO L93 Difference]: Finished difference Result 8172 states and 13340 transitions. [2023-04-01 22:36:34,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:36:34,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 130 [2023-04-01 22:36:34,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:36:34,464 INFO L225 Difference]: With dead ends: 8172 [2023-04-01 22:36:34,465 INFO L226 Difference]: Without dead ends: 5420 [2023-04-01 22:36:34,473 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 [2023-04-01 22:36:34,477 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 3388 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 7216 mSolverCounterSat, 1076 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s 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, 6.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:36:34,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3388 Valid, 792 Invalid, 8292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1076 Valid, 7216 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-04-01 22:36:34,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5420 states. [2023-04-01 22:36:34,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5420 to 5337. [2023-04-01 22:36:34,583 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) [2023-04-01 22:36:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5337 states to 5337 states and 7841 transitions. [2023-04-01 22:36:34,596 INFO L78 Accepts]: Start accepts. Automaton has 5337 states and 7841 transitions. Word has length 130 [2023-04-01 22:36:34,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:36:34,597 INFO L495 AbstractCegarLoop]: Abstraction has 5337 states and 7841 transitions. [2023-04-01 22:36:34,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2023-04-01 22:36:34,598 INFO L276 IsEmpty]: Start isEmpty. Operand 5337 states and 7841 transitions. [2023-04-01 22:36:34,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-01 22:36:34,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:36:34,603 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:36:34,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 22:36:34,604 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:36:34,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:36:34,604 INFO L85 PathProgramCache]: Analyzing trace with hash 644891605, now seen corresponding path program 1 times [2023-04-01 22:36:34,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:36:34,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625532087] [2023-04-01 22:36:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:34,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:36:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:34,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:36:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:34,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:36:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:36:34,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:36:34,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625532087] [2023-04-01 22:36:34,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625532087] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:36:34,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549868491] [2023-04-01 22:36:34,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:34,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:36:34,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:36:34,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:36:34,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 22:36:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:34,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 22:36:34,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:36:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:36:35,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:36:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:36:35,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549868491] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 22:36:35,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 22:36:35,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 13 [2023-04-01 22:36:35,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002969039] [2023-04-01 22:36:35,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:36:35,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 22:36:35,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:36:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 22:36:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-04-01 22:36:35,519 INFO L87 Difference]: Start difference. First operand 5337 states and 7841 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 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) [2023-04-01 22:36:40,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 22:36:43,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:36:43,557 INFO L93 Difference]: Finished difference Result 20810 states and 31800 transitions. [2023-04-01 22:36:43,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:36:43,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 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 140 [2023-04-01 22:36:43,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:36:43,677 INFO L225 Difference]: With dead ends: 20810 [2023-04-01 22:36:43,677 INFO L226 Difference]: Without dead ends: 15479 [2023-04-01 22:36:43,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-04-01 22:36:43,689 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 4811 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 5068 mSolverCounterSat, 3354 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4811 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 8423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3354 IncrementalHoareTripleChecker+Valid, 5068 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:36:43,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4811 Valid, 387 Invalid, 8423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3354 Valid, 5068 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2023-04-01 22:36:43,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15479 states. [2023-04-01 22:36:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15479 to 15346. [2023-04-01 22:36:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15346 states, 15008 states have (on average 1.4386327292110874) internal successors, (21591), 15072 states have internal predecessors, (21591), 74 states have call successors, (74), 74 states have call predecessors, (74), 263 states have return successors, (1752), 199 states have call predecessors, (1752), 73 states have call successors, (1752) [2023-04-01 22:36:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15346 states to 15346 states and 23417 transitions. [2023-04-01 22:36:43,968 INFO L78 Accepts]: Start accepts. Automaton has 15346 states and 23417 transitions. Word has length 140 [2023-04-01 22:36:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:36:43,969 INFO L495 AbstractCegarLoop]: Abstraction has 15346 states and 23417 transitions. [2023-04-01 22:36:43,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 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) [2023-04-01 22:36:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 15346 states and 23417 transitions. [2023-04-01 22:36:43,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-04-01 22:36:43,973 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:36:43,973 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, 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, 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] [2023-04-01 22:36:43,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 22:36:44,178 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 [2023-04-01 22:36:44,178 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:36:44,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:36:44,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1017639508, now seen corresponding path program 1 times [2023-04-01 22:36:44,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:36:44,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703511792] [2023-04-01 22:36:44,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:44,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:36:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:44,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:36:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:44,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:36:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:44,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:36:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:36:44,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:36:44,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703511792] [2023-04-01 22:36:44,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703511792] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:36:44,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216670963] [2023-04-01 22:36:44,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:44,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:36:44,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:36:44,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:36:44,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 22:36:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:44,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:36:44,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:36:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:36:44,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:36:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:36:45,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216670963] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:36:45,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:36:45,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 22:36:45,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953831905] [2023-04-01 22:36:45,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:36:45,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 22:36:45,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:36:45,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 22:36:45,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:36:45,081 INFO L87 Difference]: Start difference. First operand 15346 states and 23417 transitions. Second operand has 12 states, 12 states have (on average 40.75) internal successors, (489), 10 states have internal predecessors, (489), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 22:36:55,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:36:55,387 INFO L93 Difference]: Finished difference Result 68795 states and 120599 transitions. [2023-04-01 22:36:55,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 22:36:55,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 40.75) internal successors, (489), 10 states have internal predecessors, (489), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 260 [2023-04-01 22:36:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:36:55,604 INFO L225 Difference]: With dead ends: 68795 [2023-04-01 22:36:55,604 INFO L226 Difference]: Without dead ends: 53455 [2023-04-01 22:36:55,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 528 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=282, Invalid=1124, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 22:36:55,664 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 9262 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 9987 mSolverCounterSat, 4547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9262 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 14534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4547 IncrementalHoareTripleChecker+Valid, 9987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:36:55,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9262 Valid, 1129 Invalid, 14534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4547 Valid, 9987 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2023-04-01 22:36:55,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53455 states. [2023-04-01 22:36:56,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53455 to 47433. [2023-04-01 22:36:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47433 states, 46177 states have (on average 1.2518353292764797) internal successors, (57806), 46478 states have internal predecessors, (57806), 226 states have call successors, (226), 226 states have call predecessors, (226), 1029 states have return successors, (12641), 728 states have call predecessors, (12641), 225 states have call successors, (12641) [2023-04-01 22:36:56,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47433 states to 47433 states and 70673 transitions. [2023-04-01 22:36:56,957 INFO L78 Accepts]: Start accepts. Automaton has 47433 states and 70673 transitions. Word has length 260 [2023-04-01 22:36:56,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:36:56,957 INFO L495 AbstractCegarLoop]: Abstraction has 47433 states and 70673 transitions. [2023-04-01 22:36:56,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 40.75) internal successors, (489), 10 states have internal predecessors, (489), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 22:36:56,958 INFO L276 IsEmpty]: Start isEmpty. Operand 47433 states and 70673 transitions. [2023-04-01 22:36:56,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2023-04-01 22:36:56,967 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:36:56,967 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 22:36:56,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 22:36:57,171 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 [2023-04-01 22:36:57,172 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:36:57,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:36:57,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1084239483, now seen corresponding path program 1 times [2023-04-01 22:36:57,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:36:57,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259680790] [2023-04-01 22:36:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:57,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:36:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:57,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:36:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:57,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:36:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:57,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-04-01 22:36:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:57,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-04-01 22:36:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 104 proven. 269 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:36:58,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:36:58,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259680790] [2023-04-01 22:36:58,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259680790] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:36:58,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906405784] [2023-04-01 22:36:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:58,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:36:58,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:36:58,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:36:58,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 22:36:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:58,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:36:58,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:36:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 292 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 22:36:58,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:36:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 292 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 22:36:58,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906405784] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:36:58,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:36:58,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2023-04-01 22:36:58,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684737656] [2023-04-01 22:36:58,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:36:58,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 22:36:58,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:36:58,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 22:36:58,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-04-01 22:36:58,569 INFO L87 Difference]: Start difference. First operand 47433 states and 70673 transitions. Second operand has 15 states, 15 states have (on average 37.6) internal successors, (564), 13 states have internal predecessors, (564), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 22:37:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:37:18,197 INFO L93 Difference]: Finished difference Result 135174 states and 197020 transitions. [2023-04-01 22:37:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-04-01 22:37:18,201 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 37.6) internal successors, (564), 13 states have internal predecessors, (564), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 352 [2023-04-01 22:37:18,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:37:18,435 INFO L225 Difference]: With dead ends: 135174 [2023-04-01 22:37:18,435 INFO L226 Difference]: Without dead ends: 87747 [2023-04-01 22:37:18,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 783 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4458 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1394, Invalid=10378, Unknown=0, NotChecked=0, Total=11772 [2023-04-01 22:37:18,506 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 14639 mSDsluCounter, 1838 mSDsCounter, 0 mSdLazyCounter, 31194 mSolverCounterSat, 4050 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14639 SdHoareTripleChecker+Valid, 2133 SdHoareTripleChecker+Invalid, 35244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4050 IncrementalHoareTripleChecker+Valid, 31194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:37:18,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14639 Valid, 2133 Invalid, 35244 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4050 Valid, 31194 Invalid, 0 Unknown, 0 Unchecked, 16.7s Time] [2023-04-01 22:37:18,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87747 states. [2023-04-01 22:37:19,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87747 to 80966. [2023-04-01 22:37:19,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80966 states, 79164 states have (on average 1.122505179121823) internal successors, (88862), 79561 states have internal predecessors, (88862), 402 states have call successors, (402), 390 states have call predecessors, (402), 1399 states have return successors, (11689), 1014 states have call predecessors, (11689), 401 states have call successors, (11689) [2023-04-01 22:37:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80966 states to 80966 states and 100953 transitions. [2023-04-01 22:37:20,319 INFO L78 Accepts]: Start accepts. Automaton has 80966 states and 100953 transitions. Word has length 352 [2023-04-01 22:37:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:37:20,320 INFO L495 AbstractCegarLoop]: Abstraction has 80966 states and 100953 transitions. [2023-04-01 22:37:20,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 37.6) internal successors, (564), 13 states have internal predecessors, (564), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 22:37:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 80966 states and 100953 transitions. [2023-04-01 22:37:20,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-04-01 22:37:20,347 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:37:20,347 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 22:37:20,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 22:37:20,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:20,553 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:37:20,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:37:20,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1880485616, now seen corresponding path program 1 times [2023-04-01 22:37:20,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:37:20,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144149915] [2023-04-01 22:37:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:20,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:37:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:21,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:37:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:21,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:37:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:21,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:37:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:21,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:37:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:21,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2023-04-01 22:37:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 304 proven. 103 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-04-01 22:37:21,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:37:21,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144149915] [2023-04-01 22:37:21,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144149915] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:37:21,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878201313] [2023-04-01 22:37:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:21,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:21,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:37:21,401 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:37:21,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 22:37:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:21,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:37:21,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:37:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 539 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 22:37:21,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:37:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 311 proven. 100 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-04-01 22:37:21,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878201313] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:37:21,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:37:21,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 22:37:21,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558334882] [2023-04-01 22:37:21,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:37:21,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 22:37:21,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:37:21,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 22:37:21,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:37:21,899 INFO L87 Difference]: Start difference. First operand 80966 states and 100953 transitions. Second operand has 12 states, 12 states have (on average 49.5) internal successors, (594), 10 states have internal predecessors, (594), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 22:37:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:37:34,361 INFO L93 Difference]: Finished difference Result 209679 states and 279252 transitions. [2023-04-01 22:37:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 22:37:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 49.5) internal successors, (594), 10 states have internal predecessors, (594), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 455 [2023-04-01 22:37:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:37:35,101 INFO L225 Difference]: With dead ends: 209679 [2023-04-01 22:37:35,101 INFO L226 Difference]: Without dead ends: 127075 [2023-04-01 22:37:35,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 929 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2023-04-01 22:37:35,199 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 8736 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 15775 mSolverCounterSat, 2223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8740 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 17998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2223 IncrementalHoareTripleChecker+Valid, 15775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:37:35,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8740 Valid, 1158 Invalid, 17998 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2223 Valid, 15775 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2023-04-01 22:37:35,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127075 states. [2023-04-01 22:37:36,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127075 to 125855. [2023-04-01 22:37:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125855 states, 122819 states have (on average 1.0805901367052329) internal successors, (132717), 123531 states have internal predecessors, (132717), 758 states have call successors, (758), 602 states have call predecessors, (758), 2277 states have return successors, (22733), 1721 states have call predecessors, (22733), 757 states have call successors, (22733) [2023-04-01 22:37:37,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125855 states to 125855 states and 156208 transitions. [2023-04-01 22:37:37,615 INFO L78 Accepts]: Start accepts. Automaton has 125855 states and 156208 transitions. Word has length 455 [2023-04-01 22:37:37,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:37:37,616 INFO L495 AbstractCegarLoop]: Abstraction has 125855 states and 156208 transitions. [2023-04-01 22:37:37,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 49.5) internal successors, (594), 10 states have internal predecessors, (594), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 22:37:37,616 INFO L276 IsEmpty]: Start isEmpty. Operand 125855 states and 156208 transitions. [2023-04-01 22:37:37,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-04-01 22:37:37,645 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:37:37,645 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 22:37:37,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 22:37:37,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:37,851 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:37:37,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:37:37,851 INFO L85 PathProgramCache]: Analyzing trace with hash -705339595, now seen corresponding path program 1 times [2023-04-01 22:37:37,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:37:37,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570435635] [2023-04-01 22:37:37,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:37,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:37:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:38,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:37:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:38,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:37:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:38,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:37:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:38,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2023-04-01 22:37:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:38,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 22:37:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 223 proven. 168 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2023-04-01 22:37:38,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:37:38,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570435635] [2023-04-01 22:37:38,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570435635] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:37:38,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469284179] [2023-04-01 22:37:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:38,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:38,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:37:38,439 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:37:38,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 22:37:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:38,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 22:37:38,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:37:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 440 proven. 2 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2023-04-01 22:37:38,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:37:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 144 proven. 438 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 22:37:39,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469284179] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:37:39,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:37:39,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2023-04-01 22:37:39,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424250818] [2023-04-01 22:37:39,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:37:39,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 22:37:39,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:37:39,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 22:37:39,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-04-01 22:37:39,332 INFO L87 Difference]: Start difference. First operand 125855 states and 156208 transitions. Second operand has 18 states, 18 states have (on average 37.111111111111114) internal successors, (668), 16 states have internal predecessors, (668), 7 states have call successors, (14), 9 states have call predecessors, (14), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:38:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:38:10,059 INFO L93 Difference]: Finished difference Result 422792 states and 541965 transitions. [2023-04-01 22:38:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2023-04-01 22:38:10,060 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 37.111111111111114) internal successors, (668), 16 states have internal predecessors, (668), 7 states have call successors, (14), 9 states have call predecessors, (14), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 471 [2023-04-01 22:38:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:38:11,034 INFO L225 Difference]: With dead ends: 422792 [2023-04-01 22:38:11,034 INFO L226 Difference]: Without dead ends: 293674 [2023-04-01 22:38:11,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1189 GetRequests, 1052 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7193 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2465, Invalid=16717, Unknown=0, NotChecked=0, Total=19182 [2023-04-01 22:38:11,236 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 16959 mSDsluCounter, 2619 mSDsCounter, 0 mSdLazyCounter, 31375 mSolverCounterSat, 6834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16964 SdHoareTripleChecker+Valid, 3038 SdHoareTripleChecker+Invalid, 38209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6834 IncrementalHoareTripleChecker+Valid, 31375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:38:11,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16964 Valid, 3038 Invalid, 38209 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6834 Valid, 31375 Invalid, 0 Unknown, 0 Unchecked, 24.8s Time] [2023-04-01 22:38:11,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293674 states. [2023-04-01 22:38:15,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293674 to 272895. [2023-04-01 22:38:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272895 states, 266949 states have (on average 1.0567149530434652) internal successors, (282089), 268332 states have internal predecessors, (282089), 1647 states have call successors, (1647), 1314 states have call predecessors, (1647), 4298 states have return successors, (47583), 3248 states have call predecessors, (47583), 1646 states have call successors, (47583) [2023-04-01 22:38:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272895 states to 272895 states and 331319 transitions. [2023-04-01 22:38:17,090 INFO L78 Accepts]: Start accepts. Automaton has 272895 states and 331319 transitions. Word has length 471 [2023-04-01 22:38:17,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:38:17,091 INFO L495 AbstractCegarLoop]: Abstraction has 272895 states and 331319 transitions. [2023-04-01 22:38:17,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 37.111111111111114) internal successors, (668), 16 states have internal predecessors, (668), 7 states have call successors, (14), 9 states have call predecessors, (14), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:38:17,092 INFO L276 IsEmpty]: Start isEmpty. Operand 272895 states and 331319 transitions. [2023-04-01 22:38:17,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-04-01 22:38:17,134 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:38:17,135 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:38:17,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 22:38:17,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:38:17,343 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:38:17,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:38:17,344 INFO L85 PathProgramCache]: Analyzing trace with hash -105875166, now seen corresponding path program 1 times [2023-04-01 22:38:17,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:38:17,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212893439] [2023-04-01 22:38:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:38:17,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:38:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:18,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:38:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:18,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:38:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:18,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:38:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:18,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-04-01 22:38:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:18,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 317 [2023-04-01 22:38:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 293 proven. 93 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2023-04-01 22:38:18,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:38:18,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212893439] [2023-04-01 22:38:18,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212893439] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:38:18,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955743487] [2023-04-01 22:38:18,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:38:18,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:38:18,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:38:18,388 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:38:18,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 22:38:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:18,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:38:18,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:38:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 568 proven. 2 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-04-01 22:38:18,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:38:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 303 proven. 81 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2023-04-01 22:38:18,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955743487] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:38:18,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:38:18,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2023-04-01 22:38:18,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327631929] [2023-04-01 22:38:18,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:38:18,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 22:38:18,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:38:18,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 22:38:18,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-04-01 22:38:18,844 INFO L87 Difference]: Start difference. First operand 272895 states and 331319 transitions. Second operand has 13 states, 13 states have (on average 41.53846153846154) internal successors, (540), 11 states have internal predecessors, (540), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 22:38:31,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:38:31,849 INFO L93 Difference]: Finished difference Result 546629 states and 667460 transitions. [2023-04-01 22:38:31,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 22:38:31,850 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 41.53846153846154) internal successors, (540), 11 states have internal predecessors, (540), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 494 [2023-04-01 22:38:31,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:38:32,807 INFO L225 Difference]: With dead ends: 546629 [2023-04-01 22:38:32,807 INFO L226 Difference]: Without dead ends: 273744 [2023-04-01 22:38:33,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 1011 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 22:38:33,207 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 13507 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 15216 mSolverCounterSat, 2365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13507 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 17581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2365 IncrementalHoareTripleChecker+Valid, 15216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:38:33,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13507 Valid, 1011 Invalid, 17581 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2365 Valid, 15216 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2023-04-01 22:38:33,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273744 states. [2023-04-01 22:38:37,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273744 to 272428. [2023-04-01 22:38:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272428 states, 266345 states have (on average 1.0471043195855) internal successors, (278891), 267804 states have internal predecessors, (278891), 1641 states have call successors, (1641), 1310 states have call predecessors, (1641), 4441 states have return successors, (39700), 3313 states have call predecessors, (39700), 1640 states have call successors, (39700) [2023-04-01 22:38:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272428 states to 272428 states and 320232 transitions. [2023-04-01 22:38:38,383 INFO L78 Accepts]: Start accepts. Automaton has 272428 states and 320232 transitions. Word has length 494 [2023-04-01 22:38:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:38:38,384 INFO L495 AbstractCegarLoop]: Abstraction has 272428 states and 320232 transitions. [2023-04-01 22:38:38,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.53846153846154) internal successors, (540), 11 states have internal predecessors, (540), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 22:38:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand 272428 states and 320232 transitions. [2023-04-01 22:38:38,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2023-04-01 22:38:38,408 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:38:38,408 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2023-04-01 22:38:38,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 22:38:38,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:38:38,614 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:38:38,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:38:38,614 INFO L85 PathProgramCache]: Analyzing trace with hash -40773408, now seen corresponding path program 1 times [2023-04-01 22:38:38,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:38:38,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457807709] [2023-04-01 22:38:38,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:38:38,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:38:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:39,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:38:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:39,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:38:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:39,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:38:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:39,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:38:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:39,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2023-04-01 22:38:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:39,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2023-04-01 22:38:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 322 proven. 138 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2023-04-01 22:38:39,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:38:39,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457807709] [2023-04-01 22:38:39,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457807709] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:38:39,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110296670] [2023-04-01 22:38:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:38:39,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:38:39,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:38:39,197 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:38:39,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 22:38:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:39,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:38:39,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:38:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 351 proven. 0 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2023-04-01 22:38:39,831 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:38:39,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110296670] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:38:39,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:38:39,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 22:38:39,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500581704] [2023-04-01 22:38:39,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:38:39,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:38:39,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:38:39,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:38:39,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 22:38:39,835 INFO L87 Difference]: Start difference. First operand 272428 states and 320232 transitions. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 4 states have internal predecessors, (241), 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) [2023-04-01 22:38:47,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:38:47,057 INFO L93 Difference]: Finished difference Result 551934 states and 637588 transitions. [2023-04-01 22:38:47,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 22:38:47,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 4 states have internal predecessors, (241), 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) Word has length 507 [2023-04-01 22:38:47,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:38:47,916 INFO L225 Difference]: With dead ends: 551934 [2023-04-01 22:38:47,917 INFO L226 Difference]: Without dead ends: 280340 [2023-04-01 22:38:48,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-04-01 22:38:48,129 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 2643 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 5079 mSolverCounterSat, 881 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2643 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 5960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 881 IncrementalHoareTripleChecker+Valid, 5079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:38:48,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2643 Valid, 563 Invalid, 5960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [881 Valid, 5079 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 22:38:48,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280340 states. [2023-04-01 22:38:51,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280340 to 277723. [2023-04-01 22:38:52,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277723 states, 271846 states have (on average 1.0463828785415272) internal successors, (284455), 273327 states have internal predecessors, (284455), 1367 states have call successors, (1367), 1342 states have call predecessors, (1367), 4509 states have return successors, (28113), 3053 states have call predecessors, (28113), 1366 states have call successors, (28113) [2023-04-01 22:38:52,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277723 states to 277723 states and 313935 transitions. [2023-04-01 22:38:52,768 INFO L78 Accepts]: Start accepts. Automaton has 277723 states and 313935 transitions. Word has length 507 [2023-04-01 22:38:52,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:38:52,768 INFO L495 AbstractCegarLoop]: Abstraction has 277723 states and 313935 transitions. [2023-04-01 22:38:52,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 4 states have internal predecessors, (241), 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) [2023-04-01 22:38:52,768 INFO L276 IsEmpty]: Start isEmpty. Operand 277723 states and 313935 transitions. [2023-04-01 22:38:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2023-04-01 22:38:52,787 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:38:52,787 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 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] [2023-04-01 22:38:52,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 22:38:52,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:38:52,993 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:38:52,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:38:52,993 INFO L85 PathProgramCache]: Analyzing trace with hash -48964032, now seen corresponding path program 1 times [2023-04-01 22:38:52,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:38:52,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302186305] [2023-04-01 22:38:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:38:52,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:38:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:53,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:38:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:53,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:38:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:53,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:38:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:53,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2023-04-01 22:38:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:54,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2023-04-01 22:38:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:54,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 459 [2023-04-01 22:38:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 303 proven. 550 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-04-01 22:38:54,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:38:54,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302186305] [2023-04-01 22:38:54,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302186305] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:38:54,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683562907] [2023-04-01 22:38:54,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:38:54,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:38:54,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:38:54,061 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:38:54,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 22:38:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:54,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 22:38:54,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:38:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 768 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-04-01 22:38:56,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:39:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 178 proven. 682 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-04-01 22:39:00,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683562907] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:39:00,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:39:00,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2023-04-01 22:39:00,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678530757] [2023-04-01 22:39:00,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:39:00,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 22:39:00,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:39:00,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 22:39:00,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-04-01 22:39:00,435 INFO L87 Difference]: Start difference. First operand 277723 states and 313935 transitions. Second operand has 25 states, 25 states have (on average 47.24) internal successors, (1181), 23 states have internal predecessors, (1181), 8 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11)