/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/Problem19_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:56:20,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:56:20,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:56:20,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 23:56:20,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 23:56:20,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 23:56:20,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 23:56:20,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 23:56:20,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 23:56:20,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 23:56:20,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 23:56:20,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 23:56:20,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 23:56:20,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 23:56:20,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 23:56:20,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 23:56:20,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 23:56:20,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 23:56:20,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 23:56:20,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 23:56:20,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 23:56:20,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 23:56:20,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 23:56:20,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 23:56:20,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 23:56:20,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 23:56:20,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 23:56:20,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 23:56:20,548 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 23:56:20,577 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:56:20,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:56:20,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:56:20,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:56:20,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:56:20,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:56:20,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:56:20,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:56:20,580 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:56:20,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:56:20,581 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:56:20,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:56:20,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:56:20,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:56:20,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:56:20,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:56:20,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:56:20,582 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:56:20,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:56:20,582 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:56:20,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:56:20,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:56:20,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:56:20,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:56:20,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:56:20,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:56:20,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:56:20,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:56:20,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:56:20,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:56:20,583 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:56:20,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:56:20,584 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:56:20,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:56:20,584 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:56:20,584 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:56:20,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:56:20,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:56:20,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:56:20,806 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:56:20,807 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:56:20,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label28.c [2023-04-01 23:56:22,069 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:56:22,610 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:56:22,610 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label28.c [2023-04-01 23:56:22,655 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6907f91c/22d892efd68542db88effb3bf81bf225/FLAG13e6d7d89 [2023-04-01 23:56:22,674 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6907f91c/22d892efd68542db88effb3bf81bf225 [2023-04-01 23:56:22,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:56:22,677 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:56:22,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:56:22,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:56:22,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:56:22,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:56:22" (1/1) ... [2023-04-01 23:56:22,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f5af32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:22, skipping insertion in model container [2023-04-01 23:56:22,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:56:22" (1/1) ... [2023-04-01 23:56:22,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:56:22,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:56:23,142 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/Problem19_label28.c[3379,3392] [2023-04-01 23:56:24,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:56:24,224 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:56:24,252 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/Problem19_label28.c[3379,3392] [2023-04-01 23:56:24,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:56:25,014 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:56:25,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:25 WrapperNode [2023-04-01 23:56:25,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:56:25,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:56:25,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:56:25,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:56:25,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:25" (1/1) ... [2023-04-01 23:56:25,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:25" (1/1) ... [2023-04-01 23:56:25,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:25" (1/1) ... [2023-04-01 23:56:25,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:25" (1/1) ... [2023-04-01 23:56:25,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:25" (1/1) ... [2023-04-01 23:56:25,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:25" (1/1) ... [2023-04-01 23:56:25,352 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:25" (1/1) ... [2023-04-01 23:56:25,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:25" (1/1) ... [2023-04-01 23:56:25,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:56:25,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:56:25,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:56:25,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:56:25,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:25" (1/1) ... [2023-04-01 23:56:25,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:56:25,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:56:25,485 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 23:56:25,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 23:56:25,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:56:25,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:56:25,526 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:56:25,526 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:56:25,526 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:56:25,526 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 23:56:25,526 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 23:56:25,526 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 23:56:25,526 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 23:56:25,526 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:56:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:56:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:56:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 23:56:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 23:56:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 23:56:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 23:56:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:56:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:56:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:56:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:56:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:56:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:56:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:56:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:56:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:56:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:56:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:56:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:56:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:56:25,617 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:56:25,618 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:56:32,842 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:56:32,860 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:56:32,861 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:56:32,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:56:32 BoogieIcfgContainer [2023-04-01 23:56:32,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:56:32,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:56:32,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:56:32,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:56:32,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:56:22" (1/3) ... [2023-04-01 23:56:32,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a25359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:56:32, skipping insertion in model container [2023-04-01 23:56:32,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:56:25" (2/3) ... [2023-04-01 23:56:32,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a25359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:56:32, skipping insertion in model container [2023-04-01 23:56:32,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:56:32" (3/3) ... [2023-04-01 23:56:32,872 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label28.c [2023-04-01 23:56:32,887 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:56:32,888 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:56:32,964 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:56:32,970 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;@47d88098, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:56:32,970 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:56:32,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 23:56:32,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 23:56:32,989 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:56:32,990 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] [2023-04-01 23:56:32,993 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:56:32,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:56:32,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1190056024, now seen corresponding path program 1 times [2023-04-01 23:56:33,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:56:33,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933906173] [2023-04-01 23:56:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:56:33,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:56:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:33,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:56:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:56:33,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:56:33,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933906173] [2023-04-01 23:56:33,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933906173] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:56:33,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:56:33,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 23:56:33,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656134384] [2023-04-01 23:56:33,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:56:33,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:56:33,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:56:33,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:56:33,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:56:33,559 INFO L87 Difference]: Start difference. First operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:56:47,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:56:47,648 INFO L93 Difference]: Finished difference Result 6483 states and 12306 transitions. [2023-04-01 23:56:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 23:56:47,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 29 [2023-04-01 23:56:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:56:47,691 INFO L225 Difference]: With dead ends: 6483 [2023-04-01 23:56:47,691 INFO L226 Difference]: Without dead ends: 4638 [2023-04-01 23:56:47,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:56:47,708 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 7933 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 9147 mSolverCounterSat, 3639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7933 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 12786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3639 IncrementalHoareTripleChecker+Valid, 9147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:56:47,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7933 Valid, 495 Invalid, 12786 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3639 Valid, 9147 Invalid, 0 Unknown, 0 Unchecked, 13.5s Time] [2023-04-01 23:56:47,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4638 states. [2023-04-01 23:56:47,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4638 to 4629. [2023-04-01 23:56:47,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4571 states have (on average 1.6764384161015096) internal successors, (7663), 4574 states have internal predecessors, (7663), 20 states have call successors, (20), 20 states have call predecessors, (20), 37 states have return successors, (77), 34 states have call predecessors, (77), 19 states have call successors, (77) [2023-04-01 23:56:47,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 7760 transitions. [2023-04-01 23:56:47,892 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 7760 transitions. Word has length 29 [2023-04-01 23:56:47,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:56:47,893 INFO L495 AbstractCegarLoop]: Abstraction has 4629 states and 7760 transitions. [2023-04-01 23:56:47,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:56:47,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 7760 transitions. [2023-04-01 23:56:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-01 23:56:47,897 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:56:47,898 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:56:47,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:56:47,898 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:56:47,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:56:47,899 INFO L85 PathProgramCache]: Analyzing trace with hash -319405216, now seen corresponding path program 1 times [2023-04-01 23:56:47,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:56:47,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409252377] [2023-04-01 23:56:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:56:47,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:56:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:48,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:56:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:48,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:56:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:56:48,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:56:48,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409252377] [2023-04-01 23:56:48,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409252377] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:56:48,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:56:48,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:56:48,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624347531] [2023-04-01 23:56:48,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:56:48,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:56:48,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:56:48,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:56:48,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:56:48,505 INFO L87 Difference]: Start difference. First operand 4629 states and 7760 transitions. Second operand has 7 states, 6 states have (on average 18.666666666666668) internal successors, (112), 4 states have internal predecessors, (112), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:57:00,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:57:00,082 INFO L93 Difference]: Finished difference Result 13837 states and 23541 transitions. [2023-04-01 23:57:00,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:57:00,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.666666666666668) internal successors, (112), 4 states have internal predecessors, (112), 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 118 [2023-04-01 23:57:00,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:57:00,135 INFO L225 Difference]: With dead ends: 13837 [2023-04-01 23:57:00,136 INFO L226 Difference]: Without dead ends: 9214 [2023-04-01 23:57:00,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:57:00,153 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 8093 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 9998 mSolverCounterSat, 2126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8093 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 12124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2126 IncrementalHoareTripleChecker+Valid, 9998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:57:00,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8093 Valid, 897 Invalid, 12124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2126 Valid, 9998 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2023-04-01 23:57:00,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9214 states. [2023-04-01 23:57:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9214 to 9059. [2023-04-01 23:57:00,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9059 states, 8892 states have (on average 1.4507422402159245) internal successors, (12900), 8909 states have internal predecessors, (12900), 38 states have call successors, (38), 38 states have call predecessors, (38), 128 states have return successors, (405), 111 states have call predecessors, (405), 37 states have call successors, (405) [2023-04-01 23:57:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9059 states to 9059 states and 13343 transitions. [2023-04-01 23:57:00,424 INFO L78 Accepts]: Start accepts. Automaton has 9059 states and 13343 transitions. Word has length 118 [2023-04-01 23:57:00,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:57:00,426 INFO L495 AbstractCegarLoop]: Abstraction has 9059 states and 13343 transitions. [2023-04-01 23:57:00,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.666666666666668) internal successors, (112), 4 states have internal predecessors, (112), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:57:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 9059 states and 13343 transitions. [2023-04-01 23:57:00,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-01 23:57:00,436 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:57:00,437 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:57:00,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:57:00,437 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:57:00,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:57:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash -486793869, now seen corresponding path program 1 times [2023-04-01 23:57:00,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:57:00,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655972376] [2023-04-01 23:57:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:00,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:57:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:00,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:57:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:00,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:57:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:57:00,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:57:00,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655972376] [2023-04-01 23:57:00,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655972376] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:57:00,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:57:00,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:57:00,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57959807] [2023-04-01 23:57:00,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:57:00,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:57:00,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:57:00,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:57:00,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:57:00,971 INFO L87 Difference]: Start difference. First operand 9059 states and 13343 transitions. Second operand has 7 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:57:12,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:57:12,180 INFO L93 Difference]: Finished difference Result 27892 states and 42475 transitions. [2023-04-01 23:57:12,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:57:12,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 163 [2023-04-01 23:57:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:57:12,255 INFO L225 Difference]: With dead ends: 27892 [2023-04-01 23:57:12,255 INFO L226 Difference]: Without dead ends: 18839 [2023-04-01 23:57:12,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:57:12,283 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 11592 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 9609 mSolverCounterSat, 2149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11592 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 11758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2149 IncrementalHoareTripleChecker+Valid, 9609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:57:12,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11592 Valid, 997 Invalid, 11758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2149 Valid, 9609 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2023-04-01 23:57:12,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18839 states. [2023-04-01 23:57:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18839 to 18417. [2023-04-01 23:57:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18417 states, 17885 states have (on average 1.2922560805143974) internal successors, (23112), 17964 states have internal predecessors, (23112), 74 states have call successors, (74), 74 states have call predecessors, (74), 457 states have return successors, (1799), 378 states have call predecessors, (1799), 73 states have call successors, (1799) [2023-04-01 23:57:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18417 states to 18417 states and 24985 transitions. [2023-04-01 23:57:12,754 INFO L78 Accepts]: Start accepts. Automaton has 18417 states and 24985 transitions. Word has length 163 [2023-04-01 23:57:12,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:57:12,755 INFO L495 AbstractCegarLoop]: Abstraction has 18417 states and 24985 transitions. [2023-04-01 23:57:12,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:57:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 18417 states and 24985 transitions. [2023-04-01 23:57:12,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-04-01 23:57:12,759 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:57:12,759 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:57:12,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 23:57:12,759 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:57:12,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:57:12,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2074163132, now seen corresponding path program 1 times [2023-04-01 23:57:12,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:57:12,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266327634] [2023-04-01 23:57:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:12,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:57:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:12,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:57:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:12,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:57:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:13,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-04-01 23:57:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 44 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 23:57:13,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:57:13,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266327634] [2023-04-01 23:57:13,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266327634] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:57:13,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075643786] [2023-04-01 23:57:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:13,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:57:13,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:57:13,113 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:57:13,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 23:57:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:13,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:57:13,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:57:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-01 23:57:13,416 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:57:13,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075643786] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:57:13,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:57:13,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2023-04-01 23:57:13,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918018738] [2023-04-01 23:57:13,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:57:13,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:57:13,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:57:13,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:57:13,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:57:13,418 INFO L87 Difference]: Start difference. First operand 18417 states and 24985 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:57:22,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:57:22,031 INFO L93 Difference]: Finished difference Result 55851 states and 78306 transitions. [2023-04-01 23:57:22,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 23:57:22,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 182 [2023-04-01 23:57:22,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:57:22,166 INFO L225 Difference]: With dead ends: 55851 [2023-04-01 23:57:22,166 INFO L226 Difference]: Without dead ends: 37440 [2023-04-01 23:57:22,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:57:22,222 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 8211 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 8101 mSolverCounterSat, 1008 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8211 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 9109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1008 IncrementalHoareTripleChecker+Valid, 8101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:57:22,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8211 Valid, 941 Invalid, 9109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1008 Valid, 8101 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2023-04-01 23:57:22,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37440 states. [2023-04-01 23:57:23,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37440 to 32598. [2023-04-01 23:57:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32598 states, 31421 states have (on average 1.2786353075968302) internal successors, (40176), 31627 states have internal predecessors, (40176), 128 states have call successors, (128), 128 states have call predecessors, (128), 1048 states have return successors, (4196), 842 states have call predecessors, (4196), 127 states have call successors, (4196) [2023-04-01 23:57:23,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32598 states to 32598 states and 44500 transitions. [2023-04-01 23:57:23,274 INFO L78 Accepts]: Start accepts. Automaton has 32598 states and 44500 transitions. Word has length 182 [2023-04-01 23:57:23,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:57:23,276 INFO L495 AbstractCegarLoop]: Abstraction has 32598 states and 44500 transitions. [2023-04-01 23:57:23,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:57:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 32598 states and 44500 transitions. [2023-04-01 23:57:23,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-04-01 23:57:23,279 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:57:23,282 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:57:23,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 23:57:23,492 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 [2023-04-01 23:57:23,493 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:57:23,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:57:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1101293278, now seen corresponding path program 1 times [2023-04-01 23:57:23,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:57:23,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109619863] [2023-04-01 23:57:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:23,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:57:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:23,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:57:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:23,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:57:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:23,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-04-01 23:57:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 44 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 23:57:23,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:57:23,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109619863] [2023-04-01 23:57:23,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109619863] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:57:23,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020612787] [2023-04-01 23:57:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:23,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:57:23,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:57:23,821 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:57:23,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 23:57:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:23,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:57:23,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:57:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-01 23:57:24,098 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:57:24,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020612787] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:57:24,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:57:24,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 23:57:24,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364249228] [2023-04-01 23:57:24,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:57:24,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:57:24,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:57:24,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:57:24,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:57:24,100 INFO L87 Difference]: Start difference. First operand 32598 states and 44500 transitions. Second operand has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:57:33,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:57:33,925 INFO L93 Difference]: Finished difference Result 98970 states and 145136 transitions. [2023-04-01 23:57:33,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 23:57:33,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 198 [2023-04-01 23:57:33,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:57:34,156 INFO L225 Difference]: With dead ends: 98970 [2023-04-01 23:57:34,156 INFO L226 Difference]: Without dead ends: 66378 [2023-04-01 23:57:34,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:57:34,203 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 4826 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 8381 mSolverCounterSat, 3379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4826 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 11760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3379 IncrementalHoareTripleChecker+Valid, 8381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:57:34,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4826 Valid, 1202 Invalid, 11760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3379 Valid, 8381 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2023-04-01 23:57:34,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66378 states. [2023-04-01 23:57:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66378 to 63488. [2023-04-01 23:57:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63488 states, 60948 states have (on average 1.2307376780206076) internal successors, (75011), 61436 states have internal predecessors, (75011), 248 states have call successors, (248), 248 states have call predecessors, (248), 2291 states have return successors, (12861), 1803 states have call predecessors, (12861), 247 states have call successors, (12861) [2023-04-01 23:57:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63488 states to 63488 states and 88120 transitions. [2023-04-01 23:57:35,770 INFO L78 Accepts]: Start accepts. Automaton has 63488 states and 88120 transitions. Word has length 198 [2023-04-01 23:57:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:57:35,770 INFO L495 AbstractCegarLoop]: Abstraction has 63488 states and 88120 transitions. [2023-04-01 23:57:35,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:57:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 63488 states and 88120 transitions. [2023-04-01 23:57:35,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2023-04-01 23:57:35,779 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:57:35,779 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:57:35,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 23:57:35,985 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 [2023-04-01 23:57:35,986 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:57:35,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:57:35,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1614324419, now seen corresponding path program 1 times [2023-04-01 23:57:35,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:57:35,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387530346] [2023-04-01 23:57:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:35,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:57:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:36,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:57:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:36,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:57:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:36,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2023-04-01 23:57:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:36,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 329 [2023-04-01 23:57:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 165 proven. 97 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2023-04-01 23:57:36,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:57:36,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387530346] [2023-04-01 23:57:36,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387530346] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:57:36,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573971857] [2023-04-01 23:57:36,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:36,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:57:36,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:57:36,621 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:57:36,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 23:57:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:36,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:57:36,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:57:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 371 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-01 23:57:36,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:57:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 166 proven. 98 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-04-01 23:57:37,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573971857] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:57:37,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:57:37,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 23:57:37,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043598395] [2023-04-01 23:57:37,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:57:37,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:57:37,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:57:37,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:57:37,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:57:37,640 INFO L87 Difference]: Start difference. First operand 63488 states and 88120 transitions. Second operand has 12 states, 12 states have (on average 54.333333333333336) internal successors, (652), 10 states have internal predecessors, (652), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 23:58:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:58:17,143 INFO L93 Difference]: Finished difference Result 258271 states and 435019 transitions. [2023-04-01 23:58:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-04-01 23:58:17,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 54.333333333333336) internal successors, (652), 10 states have internal predecessors, (652), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 484 [2023-04-01 23:58:17,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:58:18,641 INFO L225 Difference]: With dead ends: 258271 [2023-04-01 23:58:18,641 INFO L226 Difference]: Without dead ends: 184548 [2023-04-01 23:58:18,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1099 GetRequests, 1028 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=814, Invalid=4298, Unknown=0, NotChecked=0, Total=5112 [2023-04-01 23:58:18,802 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 17076 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 48268 mSolverCounterSat, 5601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17080 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 53869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 5601 IncrementalHoareTripleChecker+Valid, 48268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:58:18,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17080 Valid, 2563 Invalid, 53869 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [5601 Valid, 48268 Invalid, 0 Unknown, 0 Unchecked, 35.3s Time] [2023-04-01 23:58:19,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184548 states. [2023-04-01 23:58:22,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184548 to 178598. [2023-04-01 23:58:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178598 states, 172207 states have (on average 1.1473575406342367) internal successors, (197583), 173461 states have internal predecessors, (197583), 820 states have call successors, (820), 710 states have call predecessors, (820), 5570 states have return successors, (57879), 4426 states have call predecessors, (57879), 819 states have call successors, (57879) [2023-04-01 23:58:24,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178598 states to 178598 states and 256282 transitions. [2023-04-01 23:58:24,315 INFO L78 Accepts]: Start accepts. Automaton has 178598 states and 256282 transitions. Word has length 484 [2023-04-01 23:58:24,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:58:24,316 INFO L495 AbstractCegarLoop]: Abstraction has 178598 states and 256282 transitions. [2023-04-01 23:58:24,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.333333333333336) internal successors, (652), 10 states have internal predecessors, (652), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 23:58:24,317 INFO L276 IsEmpty]: Start isEmpty. Operand 178598 states and 256282 transitions. [2023-04-01 23:58:24,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1040 [2023-04-01 23:58:24,352 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:58:24,353 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:58:24,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 23:58:24,559 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 [2023-04-01 23:58:24,560 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:58:24,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:58:24,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2045045944, now seen corresponding path program 1 times [2023-04-01 23:58:24,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:58:24,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909899926] [2023-04-01 23:58:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:58:24,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:58:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:25,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:58:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:25,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:58:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:25,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2023-04-01 23:58:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:26,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:58:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:26,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 727 [2023-04-01 23:58:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:26,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 891 [2023-04-01 23:58:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 304 proven. 287 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-04-01 23:58:26,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:58:26,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909899926] [2023-04-01 23:58:26,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909899926] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:58:26,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741893620] [2023-04-01 23:58:26,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:58:26,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:58:26,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:58:26,689 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:58:26,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 23:58:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:27,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:58:27,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:58:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 833 proven. 2 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2023-04-01 23:58:27,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:58:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 305 proven. 289 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2023-04-01 23:58:29,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741893620] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:58:29,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:58:29,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:58:29,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184346682] [2023-04-01 23:58:29,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:58:29,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:58:29,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:58:29,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:58:29,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:58:29,346 INFO L87 Difference]: Start difference. First operand 178598 states and 256282 transitions. Second operand has 11 states, 11 states have (on average 171.72727272727272) internal successors, (1889), 9 states have internal predecessors, (1889), 7 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-01 23:58:56,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:58:56,943 INFO L93 Difference]: Finished difference Result 432426 states and 635075 transitions. [2023-04-01 23:58:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-01 23:58:56,944 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 171.72727272727272) internal successors, (1889), 9 states have internal predecessors, (1889), 7 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 1039 [2023-04-01 23:58:56,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:58:58,148 INFO L225 Difference]: With dead ends: 432426 [2023-04-01 23:58:58,148 INFO L226 Difference]: Without dead ends: 252453 [2023-04-01 23:58:58,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2178 GetRequests, 2124 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=487, Invalid=2269, Unknown=0, NotChecked=0, Total=2756 [2023-04-01 23:58:58,349 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 14081 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 30376 mSolverCounterSat, 6763 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14081 SdHoareTripleChecker+Valid, 1965 SdHoareTripleChecker+Invalid, 37139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6763 IncrementalHoareTripleChecker+Valid, 30376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:58:58,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14081 Valid, 1965 Invalid, 37139 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6763 Valid, 30376 Invalid, 0 Unknown, 0 Unchecked, 23.3s Time] [2023-04-01 23:58:58,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252453 states. [2023-04-01 23:59:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252453 to 244407. [2023-04-01 23:59:02,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244407 states, 236276 states have (on average 1.1031971084663699) internal successors, (260659), 237862 states have internal predecessors, (260659), 1114 states have call successors, (1114), 980 states have call predecessors, (1114), 7016 states have return successors, (64280), 5564 states have call predecessors, (64280), 1113 states have call successors, (64280) [2023-04-01 23:59:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244407 states to 244407 states and 326053 transitions. [2023-04-01 23:59:03,781 INFO L78 Accepts]: Start accepts. Automaton has 244407 states and 326053 transitions. Word has length 1039 [2023-04-01 23:59:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:59:03,782 INFO L495 AbstractCegarLoop]: Abstraction has 244407 states and 326053 transitions. [2023-04-01 23:59:03,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.72727272727272) internal successors, (1889), 9 states have internal predecessors, (1889), 7 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-01 23:59:03,782 INFO L276 IsEmpty]: Start isEmpty. Operand 244407 states and 326053 transitions. [2023-04-01 23:59:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 927 [2023-04-01 23:59:03,796 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:59:03,797 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:59:03,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 23:59:04,003 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 [2023-04-01 23:59:04,004 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:59:04,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:59:04,005 INFO L85 PathProgramCache]: Analyzing trace with hash 88914131, now seen corresponding path program 1 times [2023-04-01 23:59:04,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:59:04,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030502325] [2023-04-01 23:59:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:59:04,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:59:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:05,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:59:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:05,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:59:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:05,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:59:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:05,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:59:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:05,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 634 [2023-04-01 23:59:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:05,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 833 [2023-04-01 23:59:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 204 proven. 10 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2023-04-01 23:59:05,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:59:05,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030502325] [2023-04-01 23:59:05,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030502325] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:59:05,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572928193] [2023-04-01 23:59:05,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:59:05,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:59:05,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:59:05,813 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:59:05,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 23:59:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:06,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:59:06,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:59:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2023-04-01 23:59:06,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:59:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2023-04-01 23:59:06,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572928193] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:59:06,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:59:06,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-04-01 23:59:06,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683438262] [2023-04-01 23:59:06,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:59:06,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:59:06,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:59:06,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:59:06,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:59:06,536 INFO L87 Difference]: Start difference. First operand 244407 states and 326053 transitions. Second operand has 12 states, 12 states have (on average 72.41666666666667) internal successors, (869), 10 states have internal predecessors, (869), 5 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-01 23:59:21,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:59:21,299 INFO L93 Difference]: Finished difference Result 489751 states and 656889 transitions. [2023-04-01 23:59:21,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:59:21,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 72.41666666666667) internal successors, (869), 10 states have internal predecessors, (869), 5 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 926 [2023-04-01 23:59:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:59:22,363 INFO L225 Difference]: With dead ends: 489751 [2023-04-01 23:59:22,363 INFO L226 Difference]: Without dead ends: 245354 [2023-04-01 23:59:22,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1884 GetRequests, 1866 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2023-04-01 23:59:22,717 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 10472 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 17454 mSolverCounterSat, 1813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10472 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 19267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1813 IncrementalHoareTripleChecker+Valid, 17454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:59:22,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10472 Valid, 1232 Invalid, 19267 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1813 Valid, 17454 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2023-04-01 23:59:22,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245354 states. [2023-04-01 23:59:26,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245354 to 244831. [2023-04-01 23:59:26,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244831 states, 236550 states have (on average 1.0946438385119426) internal successors, (258938), 238184 states have internal predecessors, (258938), 1114 states have call successors, (1114), 980 states have call predecessors, (1114), 7166 states have return successors, (58913), 5666 states have call predecessors, (58913), 1113 states have call successors, (58913) [2023-04-01 23:59:27,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244831 states to 244831 states and 318965 transitions. [2023-04-01 23:59:27,857 INFO L78 Accepts]: Start accepts. Automaton has 244831 states and 318965 transitions. Word has length 926 [2023-04-01 23:59:27,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:59:27,859 INFO L495 AbstractCegarLoop]: Abstraction has 244831 states and 318965 transitions. [2023-04-01 23:59:27,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 72.41666666666667) internal successors, (869), 10 states have internal predecessors, (869), 5 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-01 23:59:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 244831 states and 318965 transitions. [2023-04-01 23:59:27,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2023-04-01 23:59:27,872 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:59:27,873 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:59:27,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 23:59:28,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:59:28,079 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:59:28,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:59:28,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1134370950, now seen corresponding path program 1 times [2023-04-01 23:59:28,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:59:28,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010433230] [2023-04-01 23:59:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:59:28,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:59:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:30,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:59:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:30,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:59:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:30,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:59:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:30,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:59:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:30,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 634 [2023-04-01 23:59:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 287 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 23:59:31,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:59:31,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010433230] [2023-04-01 23:59:31,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010433230] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:59:31,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227498346] [2023-04-01 23:59:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:59:31,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:59:31,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:59:31,274 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:59:31,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 23:59:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:59:31,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 23:59:31,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:59:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 291 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-01 23:59:33,785 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:59:33,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227498346] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:59:33,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:59:33,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 23:59:33,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131275980] [2023-04-01 23:59:33,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:59:33,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:59:33,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:59:33,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:59:33,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:59:33,789 INFO L87 Difference]: Start difference. First operand 244831 states and 318965 transitions. Second operand has 5 states, 5 states have (on average 178.8) internal successors, (894), 4 states have internal predecessors, (894), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 23:59:45,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:59:45,425 INFO L93 Difference]: Finished difference Result 512868 states and 667519 transitions. [2023-04-01 23:59:45,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 23:59:45,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 178.8) internal successors, (894), 4 states have internal predecessors, (894), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 927 [2023-04-01 23:59:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted.