/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/Problem18_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:46:13,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:46:13,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:46:14,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:46:14,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:46:14,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:46:14,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:46:14,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:46:14,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:46:14,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:46:14,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:46:14,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:46:14,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:46:14,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:46:14,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:46:14,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:46:14,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:46:14,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:46:14,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:46:14,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:46:14,073 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:46:14,108 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:46:14,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:46:14,109 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:46:14,109 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:46:14,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:46:14,110 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:46:14,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:46:14,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:46:14,111 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:46:14,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:46:14,112 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:46:14,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:46:14,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:46:14,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:46:14,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:46:14,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:46:14,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:46:14,112 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:46:14,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:46:14,113 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:46:14,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:46:14,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:46:14,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:46:14,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:46:14,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:46:14,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:46:14,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:46:14,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:46:14,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:46:14,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:46:14,114 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:46:14,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:46:14,115 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:46:14,115 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:46:14,115 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:46:14,115 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:46:14,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:46:14,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:46:14,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:46:14,398 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:46:14,398 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:46:14,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label46.c [2023-03-30 23:46:15,501 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:46:15,898 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:46:15,899 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label46.c [2023-03-30 23:46:15,925 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb6f4b5ef/8675e1a6bc924509bcebda4373019ff5/FLAGda2603715 [2023-03-30 23:46:15,939 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb6f4b5ef/8675e1a6bc924509bcebda4373019ff5 [2023-03-30 23:46:15,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:46:15,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:46:15,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:46:15,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:46:15,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:46:15,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:46:15" (1/1) ... [2023-03-30 23:46:15,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@175ea17b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:15, skipping insertion in model container [2023-03-30 23:46:15,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:46:15" (1/1) ... [2023-03-30 23:46:15,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:46:16,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:46:16,236 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/Problem18_label46.c[3974,3987] [2023-03-30 23:46:16,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:46:16,833 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:46:16,859 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/Problem18_label46.c[3974,3987] [2023-03-30 23:46:17,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:46:17,140 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:46:17,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:17 WrapperNode [2023-03-30 23:46:17,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:46:17,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:46:17,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:46:17,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:46:17,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:17" (1/1) ... [2023-03-30 23:46:17,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:17" (1/1) ... [2023-03-30 23:46:17,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:17" (1/1) ... [2023-03-30 23:46:17,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:17" (1/1) ... [2023-03-30 23:46:17,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:17" (1/1) ... [2023-03-30 23:46:17,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:17" (1/1) ... [2023-03-30 23:46:17,320 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:17" (1/1) ... [2023-03-30 23:46:17,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:17" (1/1) ... [2023-03-30 23:46:17,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:46:17,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:46:17,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:46:17,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:46:17,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:17" (1/1) ... [2023-03-30 23:46:17,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:46:17,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:17,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 23:46:17,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 23:46:17,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:46:17,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:46:17,420 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:46:17,420 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:46:17,420 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:46:17,420 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:46:17,420 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:46:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:46:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:46:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:46:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:46:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:46:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:46:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:46:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:46:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:46:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:46:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:46:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:46:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:46:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:46:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:46:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:46:17,504 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:46:17,506 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:46:20,280 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:46:20,291 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:46:20,291 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:46:20,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:46:20 BoogieIcfgContainer [2023-03-30 23:46:20,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:46:20,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:46:20,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:46:20,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:46:20,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:46:15" (1/3) ... [2023-03-30 23:46:20,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3becaac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:46:20, skipping insertion in model container [2023-03-30 23:46:20,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:17" (2/3) ... [2023-03-30 23:46:20,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3becaac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:46:20, skipping insertion in model container [2023-03-30 23:46:20,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:46:20" (3/3) ... [2023-03-30 23:46:20,300 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label46.c [2023-03-30 23:46:20,314 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:46:20,315 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:46:20,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:46:20,375 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;@10fe1503, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:46:20,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:46:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand has 774 states, 762 states have (on average 1.9041994750656168) internal successors, (1451), 763 states have internal predecessors, (1451), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 23:46:20,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-30 23:46:20,390 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:20,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:46:20,391 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:20,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:20,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1518914379, now seen corresponding path program 1 times [2023-03-30 23:46:20,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:20,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610527851] [2023-03-30 23:46:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:20,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:20,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:46:20,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:20,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610527851] [2023-03-30 23:46:20,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610527851] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:20,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:46:20,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:46:20,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790901849] [2023-03-30 23:46:20,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:20,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:46:20,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:20,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:46:20,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:46:20,919 INFO L87 Difference]: Start difference. First operand has 774 states, 762 states have (on average 1.9041994750656168) internal successors, (1451), 763 states have internal predecessors, (1451), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:46:25,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:25,327 INFO L93 Difference]: Finished difference Result 2270 states and 4349 transitions. [2023-03-30 23:46:25,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:46:25,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 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 42 [2023-03-30 23:46:25,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:25,348 INFO L225 Difference]: With dead ends: 2270 [2023-03-30 23:46:25,348 INFO L226 Difference]: Without dead ends: 1432 [2023-03-30 23:46:25,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:46:25,358 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2151 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3363 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2151 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 3955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 3363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:25,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2151 Valid, 37 Invalid, 3955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 3363 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-03-30 23:46:25,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2023-03-30 23:46:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1425. [2023-03-30 23:46:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1404 states have (on average 1.5690883190883191) internal successors, (2203), 1406 states have internal predecessors, (2203), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (18), 10 states have call predecessors, (18), 7 states have call successors, (18) [2023-03-30 23:46:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 2229 transitions. [2023-03-30 23:46:25,467 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 2229 transitions. Word has length 42 [2023-03-30 23:46:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:25,468 INFO L495 AbstractCegarLoop]: Abstraction has 1425 states and 2229 transitions. [2023-03-30 23:46:25,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:46:25,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 2229 transitions. [2023-03-30 23:46:25,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-03-30 23:46:25,474 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:25,475 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:46:25,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:46:25,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:25,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:25,476 INFO L85 PathProgramCache]: Analyzing trace with hash -214615566, now seen corresponding path program 1 times [2023-03-30 23:46:25,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:25,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481076836] [2023-03-30 23:46:25,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:25,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:25,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:25,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:46:25,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:25,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481076836] [2023-03-30 23:46:25,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481076836] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:25,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:46:25,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:46:25,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927969228] [2023-03-30 23:46:25,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:25,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:46:25,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:25,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:46:25,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:46:25,880 INFO L87 Difference]: Start difference. First operand 1425 states and 2229 transitions. Second operand has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 4 states have internal predecessors, (106), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:46:30,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:30,795 INFO L93 Difference]: Finished difference Result 4355 states and 6855 transitions. [2023-03-30 23:46:30,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:46:30,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 4 states have internal predecessors, (106), 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 112 [2023-03-30 23:46:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:30,809 INFO L225 Difference]: With dead ends: 4355 [2023-03-30 23:46:30,810 INFO L226 Difference]: Without dead ends: 2936 [2023-03-30 23:46:30,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:46:30,814 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3812 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 4845 mSolverCounterSat, 826 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3812 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 5671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 826 IncrementalHoareTripleChecker+Valid, 4845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:30,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3812 Valid, 123 Invalid, 5671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [826 Valid, 4845 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-03-30 23:46:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2023-03-30 23:46:30,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 2886. [2023-03-30 23:46:30,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2886 states, 2831 states have (on average 1.3733663016601907) internal successors, (3888), 2842 states have internal predecessors, (3888), 14 states have call successors, (14), 14 states have call predecessors, (14), 40 states have return successors, (85), 29 states have call predecessors, (85), 13 states have call successors, (85) [2023-03-30 23:46:30,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 3987 transitions. [2023-03-30 23:46:30,890 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 3987 transitions. Word has length 112 [2023-03-30 23:46:30,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:30,891 INFO L495 AbstractCegarLoop]: Abstraction has 2886 states and 3987 transitions. [2023-03-30 23:46:30,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 4 states have internal predecessors, (106), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:46:30,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 3987 transitions. [2023-03-30 23:46:30,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-03-30 23:46:30,904 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:30,904 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:46:30,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:46:30,905 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:30,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:30,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1300488214, now seen corresponding path program 1 times [2023-03-30 23:46:30,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:30,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663106566] [2023-03-30 23:46:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:30,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:31,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:31,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:46:31,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:31,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663106566] [2023-03-30 23:46:31,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663106566] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:31,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:46:31,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:46:31,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29800027] [2023-03-30 23:46:31,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:31,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:46:31,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:31,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:46:31,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:46:31,446 INFO L87 Difference]: Start difference. First operand 2886 states and 3987 transitions. Second operand has 8 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:46:37,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:37,739 INFO L93 Difference]: Finished difference Result 11696 states and 16595 transitions. [2023-03-30 23:46:37,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:46:37,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 174 [2023-03-30 23:46:37,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:37,773 INFO L225 Difference]: With dead ends: 11696 [2023-03-30 23:46:37,773 INFO L226 Difference]: Without dead ends: 8816 [2023-03-30 23:46:37,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:46:37,782 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3829 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 7432 mSolverCounterSat, 1568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3829 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 9000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1568 IncrementalHoareTripleChecker+Valid, 7432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:37,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3829 Valid, 118 Invalid, 9000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1568 Valid, 7432 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-03-30 23:46:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8816 states. [2023-03-30 23:46:37,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8816 to 8757. [2023-03-30 23:46:37,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8757 states, 8556 states have (on average 1.2331697054698456) internal successors, (10551), 8606 states have internal predecessors, (10551), 38 states have call successors, (38), 38 states have call predecessors, (38), 162 states have return successors, (568), 112 states have call predecessors, (568), 37 states have call successors, (568) [2023-03-30 23:46:37,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8757 states to 8757 states and 11157 transitions. [2023-03-30 23:46:37,997 INFO L78 Accepts]: Start accepts. Automaton has 8757 states and 11157 transitions. Word has length 174 [2023-03-30 23:46:37,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:37,999 INFO L495 AbstractCegarLoop]: Abstraction has 8757 states and 11157 transitions. [2023-03-30 23:46:38,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:46:38,000 INFO L276 IsEmpty]: Start isEmpty. Operand 8757 states and 11157 transitions. [2023-03-30 23:46:38,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-03-30 23:46:38,002 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:38,003 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:46:38,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:46:38,004 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:38,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:38,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1471197630, now seen corresponding path program 1 times [2023-03-30 23:46:38,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:38,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573634741] [2023-03-30 23:46:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:38,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:38,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:38,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:38,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:46:38,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:38,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573634741] [2023-03-30 23:46:38,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573634741] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:38,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103947788] [2023-03-30 23:46:38,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:38,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:38,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:38,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:46:38,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:46:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:38,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:38,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:46:38,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:46:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:46:38,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103947788] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:46:38,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:46:38,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:46:38,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513157847] [2023-03-30 23:46:38,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:46:38,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:46:38,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:38,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:46:38,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:46:38,955 INFO L87 Difference]: Start difference. First operand 8757 states and 11157 transitions. Second operand has 11 states, 11 states have (on average 33.72727272727273) internal successors, (371), 9 states have internal predecessors, (371), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:46:46,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:46,436 INFO L93 Difference]: Finished difference Result 23722 states and 31240 transitions. [2023-03-30 23:46:46,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-30 23:46:46,437 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 33.72727272727273) internal successors, (371), 9 states have internal predecessors, (371), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 237 [2023-03-30 23:46:46,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:46,492 INFO L225 Difference]: With dead ends: 23722 [2023-03-30 23:46:46,492 INFO L226 Difference]: Without dead ends: 13303 [2023-03-30 23:46:46,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 478 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2023-03-30 23:46:46,513 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 4024 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 11892 mSolverCounterSat, 2372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4027 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 14264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2372 IncrementalHoareTripleChecker+Valid, 11892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:46,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4027 Valid, 203 Invalid, 14264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2372 Valid, 11892 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-03-30 23:46:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13303 states. [2023-03-30 23:46:46,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13303 to 11715. [2023-03-30 23:46:46,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11715 states, 11430 states have (on average 1.0864391951006125) internal successors, (12418), 11510 states have internal predecessors, (12418), 50 states have call successors, (50), 50 states have call predecessors, (50), 234 states have return successors, (723), 154 states have call predecessors, (723), 49 states have call successors, (723) [2023-03-30 23:46:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11715 states to 11715 states and 13191 transitions. [2023-03-30 23:46:46,771 INFO L78 Accepts]: Start accepts. Automaton has 11715 states and 13191 transitions. Word has length 237 [2023-03-30 23:46:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:46,773 INFO L495 AbstractCegarLoop]: Abstraction has 11715 states and 13191 transitions. [2023-03-30 23:46:46,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 33.72727272727273) internal successors, (371), 9 states have internal predecessors, (371), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:46:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand 11715 states and 13191 transitions. [2023-03-30 23:46:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2023-03-30 23:46:46,779 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:46,779 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, 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, 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] [2023-03-30 23:46:46,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:46:46,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:46,985 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:46,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:46,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1878529396, now seen corresponding path program 1 times [2023-03-30 23:46:46,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:46,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617454711] [2023-03-30 23:46:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:46,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:47,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:47,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:47,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:47,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:46:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 108 proven. 3 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:46:47,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:47,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617454711] [2023-03-30 23:46:47,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617454711] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:47,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336662787] [2023-03-30 23:46:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:47,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:47,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:47,402 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:46:47,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:46:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:47,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:47,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:46:47,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:46:47,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336662787] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:47,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:46:47,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:46:47,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726629873] [2023-03-30 23:46:47,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:47,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:46:47,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:47,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:46:47,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:46:47,610 INFO L87 Difference]: Start difference. First operand 11715 states and 13191 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:46:49,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:49,376 INFO L93 Difference]: Finished difference Result 33457 states and 38616 transitions. [2023-03-30 23:46:49,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:46:49,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 358 [2023-03-30 23:46:49,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:49,447 INFO L225 Difference]: With dead ends: 33457 [2023-03-30 23:46:49,447 INFO L226 Difference]: Without dead ends: 21748 [2023-03-30 23:46:49,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:46:49,544 INFO L413 NwaCegarLoop]: 905 mSDtfsCounter, 673 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:49,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 931 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1743 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-30 23:46:49,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21748 states. [2023-03-30 23:46:49,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21748 to 21743. [2023-03-30 23:46:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21743 states, 21292 states have (on average 1.0749577306030433) internal successors, (22888), 21418 states have internal predecessors, (22888), 92 states have call successors, (92), 92 states have call predecessors, (92), 358 states have return successors, (1698), 232 states have call predecessors, (1698), 91 states have call successors, (1698) [2023-03-30 23:46:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21743 states to 21743 states and 24678 transitions. [2023-03-30 23:46:49,964 INFO L78 Accepts]: Start accepts. Automaton has 21743 states and 24678 transitions. Word has length 358 [2023-03-30 23:46:49,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:49,966 INFO L495 AbstractCegarLoop]: Abstraction has 21743 states and 24678 transitions. [2023-03-30 23:46:49,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:46:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 21743 states and 24678 transitions. [2023-03-30 23:46:49,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2023-03-30 23:46:49,973 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:49,973 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, 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, 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] [2023-03-30 23:46:49,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:46:50,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:50,180 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:50,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:50,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2000401268, now seen corresponding path program 1 times [2023-03-30 23:46:50,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:50,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410478756] [2023-03-30 23:46:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:50,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:50,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:50,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:50,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:50,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:46:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 107 proven. 12 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2023-03-30 23:46:50,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:50,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410478756] [2023-03-30 23:46:50,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410478756] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:50,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089720876] [2023-03-30 23:46:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:50,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:50,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:50,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:46:50,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:46:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:50,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:50,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:46:51,040 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:46:51,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089720876] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:51,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:46:51,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 9 [2023-03-30 23:46:51,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929063709] [2023-03-30 23:46:51,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:51,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:46:51,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:51,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:46:51,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-03-30 23:46:51,046 INFO L87 Difference]: Start difference. First operand 21743 states and 24678 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:46:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:52,809 INFO L93 Difference]: Finished difference Result 43480 states and 49350 transitions. [2023-03-30 23:46:52,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:46:52,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 402 [2023-03-30 23:46:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:52,873 INFO L225 Difference]: With dead ends: 43480 [2023-03-30 23:46:52,873 INFO L226 Difference]: Without dead ends: 21743 [2023-03-30 23:46:52,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-03-30 23:46:52,916 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 730 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:52,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 946 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-30 23:46:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21743 states. [2023-03-30 23:46:53,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21743 to 20329. [2023-03-30 23:46:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20329 states, 19894 states have (on average 1.0521262692269027) internal successors, (20931), 20018 states have internal predecessors, (20931), 86 states have call successors, (86), 86 states have call predecessors, (86), 348 states have return successors, (1118), 224 states have call predecessors, (1118), 85 states have call successors, (1118) [2023-03-30 23:46:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20329 states to 20329 states and 22135 transitions. [2023-03-30 23:46:53,381 INFO L78 Accepts]: Start accepts. Automaton has 20329 states and 22135 transitions. Word has length 402 [2023-03-30 23:46:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:53,381 INFO L495 AbstractCegarLoop]: Abstraction has 20329 states and 22135 transitions. [2023-03-30 23:46:53,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:46:53,382 INFO L276 IsEmpty]: Start isEmpty. Operand 20329 states and 22135 transitions. [2023-03-30 23:46:53,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2023-03-30 23:46:53,391 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:53,391 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, 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, 3, 3, 3, 3, 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] [2023-03-30 23:46:53,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 23:46:53,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:53,597 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:53,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:53,598 INFO L85 PathProgramCache]: Analyzing trace with hash -393434745, now seen corresponding path program 1 times [2023-03-30 23:46:53,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:53,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469251748] [2023-03-30 23:46:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:53,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:54,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:54,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:54,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:54,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:46:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:54,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2023-03-30 23:46:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 443 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2023-03-30 23:46:54,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:54,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469251748] [2023-03-30 23:46:54,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469251748] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:54,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987175092] [2023-03-30 23:46:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:54,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:54,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:54,281 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:46:54,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:46:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:54,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:54,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 446 proven. 2 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:46:54,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:46:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 446 proven. 2 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:46:54,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987175092] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:46:54,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:46:54,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:46:54,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140554997] [2023-03-30 23:46:54,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:46:54,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:46:54,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:54,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:46:54,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:46:54,945 INFO L87 Difference]: Start difference. First operand 20329 states and 22135 transitions. Second operand has 12 states, 12 states have (on average 40.416666666666664) internal successors, (485), 10 states have internal predecessors, (485), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:47:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:47:01,545 INFO L93 Difference]: Finished difference Result 46454 states and 51175 transitions. [2023-03-30 23:47:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-30 23:47:01,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 40.416666666666664) internal successors, (485), 10 states have internal predecessors, (485), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 466 [2023-03-30 23:47:01,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:47:01,603 INFO L225 Difference]: With dead ends: 46454 [2023-03-30 23:47:01,603 INFO L226 Difference]: Without dead ends: 23993 [2023-03-30 23:47:01,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 968 GetRequests, 946 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2023-03-30 23:47:01,631 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 3739 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 10638 mSolverCounterSat, 1011 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3739 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 11649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1011 IncrementalHoareTripleChecker+Valid, 10638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:47:01,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3739 Valid, 250 Invalid, 11649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1011 Valid, 10638 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-03-30 23:47:01,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23993 states. [2023-03-30 23:47:01,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23993 to 23939. [2023-03-30 23:47:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23939 states, 23434 states have (on average 1.0516343774003585) internal successors, (24644), 23578 states have internal predecessors, (24644), 101 states have call successors, (101), 101 states have call predecessors, (101), 403 states have return successors, (1391), 259 states have call predecessors, (1391), 100 states have call successors, (1391) [2023-03-30 23:47:02,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23939 states to 23939 states and 26136 transitions. [2023-03-30 23:47:02,000 INFO L78 Accepts]: Start accepts. Automaton has 23939 states and 26136 transitions. Word has length 466 [2023-03-30 23:47:02,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:47:02,001 INFO L495 AbstractCegarLoop]: Abstraction has 23939 states and 26136 transitions. [2023-03-30 23:47:02,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 40.416666666666664) internal successors, (485), 10 states have internal predecessors, (485), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:47:02,001 INFO L276 IsEmpty]: Start isEmpty. Operand 23939 states and 26136 transitions. [2023-03-30 23:47:02,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-03-30 23:47:02,011 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:47:02,012 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, 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, 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] [2023-03-30 23:47:02,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 23:47:02,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:47:02,221 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:47:02,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:47:02,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1757017369, now seen corresponding path program 1 times [2023-03-30 23:47:02,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:47:02,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684060127] [2023-03-30 23:47:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:47:02,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:47:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:47:02,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:47:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:47:02,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:47:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:47:02,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:47:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:47:02,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:47:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:47:02,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2023-03-30 23:47:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:47:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 381 proven. 2 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-03-30 23:47:02,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:47:02,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684060127] [2023-03-30 23:47:02,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684060127] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:47:02,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44328487] [2023-03-30 23:47:02,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:47:02,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:47:02,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:47:02,672 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:47:02,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:47:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:47:02,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:47:02,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:47:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 384 proven. 2 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:47:02,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:47:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 384 proven. 2 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:47:03,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44328487] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:47:03,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:47:03,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:47:03,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581682230] [2023-03-30 23:47:03,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:47:03,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:47:03,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:47:03,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:47:03,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:47:03,216 INFO L87 Difference]: Start difference. First operand 23939 states and 26136 transitions. Second operand has 11 states, 11 states have (on average 36.90909090909091) internal successors, (406), 9 states have internal predecessors, (406), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)