/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_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:50:16,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:50:16,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:50:16,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 23:50:16,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 23:50:16,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 23:50:16,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 23:50:16,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 23:50:16,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 23:50:16,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 23:50:16,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 23:50:16,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 23:50:16,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 23:50:16,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 23:50:16,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 23:50:16,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 23:50:16,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 23:50:16,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 23:50:16,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 23:50:16,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 23:50:16,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 23:50:16,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 23:50:16,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 23:50:16,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 23:50:16,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 23:50:16,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 23:50:16,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 23:50:16,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 23:50:16,481 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 23:50:16,504 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:50:16,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:50:16,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:50:16,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:50:16,506 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:50:16,506 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:50:16,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:50:16,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:50:16,507 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:50:16,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:50:16,507 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:50:16,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:50:16,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:50:16,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:50:16,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:50:16,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:50:16,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:50:16,508 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:50:16,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:50:16,508 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:50:16,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:50:16,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:50:16,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:50:16,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:50:16,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:50:16,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:50:16,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:50:16,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:50:16,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:50:16,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:50:16,509 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:50:16,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:50:16,510 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:50:16,510 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:50:16,510 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:50:16,510 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:50:16,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:50:16,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:50:16,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:50:16,717 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:50:16,719 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:50:16,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label08.c [2023-04-01 23:50:17,669 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:50:18,101 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:50:18,101 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label08.c [2023-04-01 23:50:18,135 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f731eb8a7/59704070f9004d1e841f78f5fd8b51f1/FLAG0805c8e78 [2023-04-01 23:50:18,148 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f731eb8a7/59704070f9004d1e841f78f5fd8b51f1 [2023-04-01 23:50:18,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:50:18,151 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:50:18,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:50:18,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:50:18,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:50:18,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:50:18" (1/1) ... [2023-04-01 23:50:18,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dcddf32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:18, skipping insertion in model container [2023-04-01 23:50:18,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:50:18" (1/1) ... [2023-04-01 23:50:18,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:50:18,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:50:18,514 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_label08.c[5076,5089] [2023-04-01 23:50:19,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:50:19,364 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:50:19,388 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_label08.c[5076,5089] [2023-04-01 23:50:19,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:50:19,887 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:50:19,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:19 WrapperNode [2023-04-01 23:50:19,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:50:19,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:50:19,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:50:19,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:50:19,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:19" (1/1) ... [2023-04-01 23:50:19,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:19" (1/1) ... [2023-04-01 23:50:19,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:19" (1/1) ... [2023-04-01 23:50:19,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:19" (1/1) ... [2023-04-01 23:50:20,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:19" (1/1) ... [2023-04-01 23:50:20,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:19" (1/1) ... [2023-04-01 23:50:20,134 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:19" (1/1) ... [2023-04-01 23:50:20,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:19" (1/1) ... [2023-04-01 23:50:20,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:50:20,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:50:20,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:50:20,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:50:20,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:19" (1/1) ... [2023-04-01 23:50:20,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:50:20,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:50:20,216 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 23:50:20,281 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 23:50:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:50:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:50:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:50:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:50:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:50:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 23:50:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 23:50:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 23:50:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 23:50:20,304 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:50:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:50:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:50:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 23:50:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 23:50:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 23:50:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 23:50:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:50:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:50:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:50:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:50:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:50:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:50:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:50:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:50:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:50:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:50:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:50:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:50:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:50:20,395 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:50:20,397 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:50:25,830 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:50:25,842 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:50:25,843 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:50:25,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:50:25 BoogieIcfgContainer [2023-04-01 23:50:25,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:50:25,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:50:25,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:50:25,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:50:25,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:50:18" (1/3) ... [2023-04-01 23:50:25,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dbccb45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:50:25, skipping insertion in model container [2023-04-01 23:50:25,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:19" (2/3) ... [2023-04-01 23:50:25,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dbccb45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:50:25, skipping insertion in model container [2023-04-01 23:50:25,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:50:25" (3/3) ... [2023-04-01 23:50:25,851 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label08.c [2023-04-01 23:50:25,862 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:50:25,862 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:50:25,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:50:25,918 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;@4b4eae4a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:50:25,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:50:25,925 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 23:50:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 23:50:25,931 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:50:25,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:50:25,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:50:25,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:50:25,935 INFO L85 PathProgramCache]: Analyzing trace with hash 903504736, now seen corresponding path program 1 times [2023-04-01 23:50:25,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:50:25,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901082393] [2023-04-01 23:50:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:50:25,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:50:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:50:26,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:50:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:50:26,367 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 23:50:26,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:50:26,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901082393] [2023-04-01 23:50:26,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901082393] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:50:26,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:50:26,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 23:50:26,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101763253] [2023-04-01 23:50:26,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:50:26,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:50:26,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:50:26,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:50:26,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:50:26,418 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 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 23:50:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:50:37,648 INFO L93 Difference]: Finished difference Result 6480 states and 12299 transitions. [2023-04-01 23:50:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 23:50:37,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 43 [2023-04-01 23:50:37,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:50:37,677 INFO L225 Difference]: With dead ends: 6480 [2023-04-01 23:50:37,677 INFO L226 Difference]: Without dead ends: 4635 [2023-04-01 23:50:37,685 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 23:50:37,688 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 7778 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 9808 mSolverCounterSat, 2328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7778 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 12136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2328 IncrementalHoareTripleChecker+Valid, 9808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:50:37,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7778 Valid, 493 Invalid, 12136 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2328 Valid, 9808 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2023-04-01 23:50:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2023-04-01 23:50:37,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 4629. [2023-04-01 23:50:37,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4571 states have (on average 1.6740319404944213) internal successors, (7652), 4574 states have internal predecessors, (7652), 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 23:50:37,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 7749 transitions. [2023-04-01 23:50:37,852 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 7749 transitions. Word has length 43 [2023-04-01 23:50:37,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:50:37,853 INFO L495 AbstractCegarLoop]: Abstraction has 4629 states and 7749 transitions. [2023-04-01 23:50:37,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 23:50:37,853 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 7749 transitions. [2023-04-01 23:50:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 23:50:37,862 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:50:37,862 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:50:37,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:50:37,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:50:37,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:50:37,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1966989606, now seen corresponding path program 1 times [2023-04-01 23:50:37,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:50:37,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192490220] [2023-04-01 23:50:37,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:50:37,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:50:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:50:38,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:50:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:50:38,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:50:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:50:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:50:38,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:50:38,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192490220] [2023-04-01 23:50:38,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192490220] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:50:38,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:50:38,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 23:50:38,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215902723] [2023-04-01 23:50:38,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:50:38,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 23:50:38,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:50:38,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 23:50:38,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:50:38,185 INFO L87 Difference]: Start difference. First operand 4629 states and 7749 transitions. Second operand has 8 states, 7 states have (on average 16.428571428571427) internal successors, (115), 5 states have internal predecessors, (115), 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 23:50:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:50:47,992 INFO L93 Difference]: Finished difference Result 10809 states and 17786 transitions. [2023-04-01 23:50:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 23:50:47,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 16.428571428571427) internal successors, (115), 5 states have internal predecessors, (115), 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 121 [2023-04-01 23:50:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:50:48,016 INFO L225 Difference]: With dead ends: 10809 [2023-04-01 23:50:48,017 INFO L226 Difference]: Without dead ends: 6186 [2023-04-01 23:50:48,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:50:48,030 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 5313 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 11948 mSolverCounterSat, 1993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5313 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 13941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1993 IncrementalHoareTripleChecker+Valid, 11948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:50:48,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5313 Valid, 818 Invalid, 13941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1993 Valid, 11948 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2023-04-01 23:50:48,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2023-04-01 23:50:48,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 6137. [2023-04-01 23:50:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6137 states, 6029 states have (on average 1.4795156742411677) internal successors, (8920), 6039 states have internal predecessors, (8920), 26 states have call successors, (26), 26 states have call predecessors, (26), 81 states have return successors, (175), 71 states have call predecessors, (175), 25 states have call successors, (175) [2023-04-01 23:50:48,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6137 states to 6137 states and 9121 transitions. [2023-04-01 23:50:48,167 INFO L78 Accepts]: Start accepts. Automaton has 6137 states and 9121 transitions. Word has length 121 [2023-04-01 23:50:48,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:50:48,168 INFO L495 AbstractCegarLoop]: Abstraction has 6137 states and 9121 transitions. [2023-04-01 23:50:48,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 16.428571428571427) internal successors, (115), 5 states have internal predecessors, (115), 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 23:50:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 6137 states and 9121 transitions. [2023-04-01 23:50:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-01 23:50:48,171 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:50:48,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:50:48,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:50:48,172 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:50:48,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:50:48,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1556122950, now seen corresponding path program 1 times [2023-04-01 23:50:48,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:50:48,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253752234] [2023-04-01 23:50:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:50:48,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:50:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:50:48,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:50:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:50:48,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:50:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:50:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:50:48,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:50:48,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253752234] [2023-04-01 23:50:48,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253752234] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:50:48,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:50:48,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:50:48,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604504267] [2023-04-01 23:50:48,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:50:48,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:50:48,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:50:48,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:50:48,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:50:48,466 INFO L87 Difference]: Start difference. First operand 6137 states and 9121 transitions. Second operand has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 4 states have internal predecessors, (118), 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 23:50:58,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:50:58,558 INFO L93 Difference]: Finished difference Result 18713 states and 28143 transitions. [2023-04-01 23:50:58,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:50:58,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 4 states have internal predecessors, (118), 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 124 [2023-04-01 23:50:58,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:50:58,602 INFO L225 Difference]: With dead ends: 18713 [2023-04-01 23:50:58,603 INFO L226 Difference]: Without dead ends: 12582 [2023-04-01 23:50:58,613 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 23:50:58,613 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 14123 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 9844 mSolverCounterSat, 829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14123 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 10673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 9844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:50:58,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14123 Valid, 783 Invalid, 10673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [829 Valid, 9844 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2023-04-01 23:50:58,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12582 states. [2023-04-01 23:50:58,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12582 to 12184. [2023-04-01 23:50:58,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12184 states, 11913 states have (on average 1.428859229413246) internal successors, (17022), 11946 states have internal predecessors, (17022), 50 states have call successors, (50), 50 states have call predecessors, (50), 220 states have return successors, (561), 187 states have call predecessors, (561), 49 states have call successors, (561) [2023-04-01 23:50:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12184 states to 12184 states and 17633 transitions. [2023-04-01 23:50:58,829 INFO L78 Accepts]: Start accepts. Automaton has 12184 states and 17633 transitions. Word has length 124 [2023-04-01 23:50:58,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:50:58,830 INFO L495 AbstractCegarLoop]: Abstraction has 12184 states and 17633 transitions. [2023-04-01 23:50:58,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 4 states have internal predecessors, (118), 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 23:50:58,831 INFO L276 IsEmpty]: Start isEmpty. Operand 12184 states and 17633 transitions. [2023-04-01 23:50:58,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-04-01 23:50:58,835 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:50:58,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:50:58,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 23:50:58,836 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:50:58,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:50:58,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1851356912, now seen corresponding path program 1 times [2023-04-01 23:50:58,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:50:58,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906559295] [2023-04-01 23:50:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:50:58,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:50:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:50:59,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:50:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:50:59,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:50:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:50:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:50:59,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:50:59,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906559295] [2023-04-01 23:50:59,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906559295] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:50:59,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:50:59,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:50:59,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536445028] [2023-04-01 23:50:59,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:50:59,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:50:59,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:50:59,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:50:59,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:50:59,149 INFO L87 Difference]: Start difference. First operand 12184 states and 17633 transitions. Second operand has 7 states, 6 states have (on average 23.0) internal successors, (138), 4 states have internal predecessors, (138), 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 23:51:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:51:10,022 INFO L93 Difference]: Finished difference Result 37596 states and 55301 transitions. [2023-04-01 23:51:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:51:10,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 23.0) internal successors, (138), 4 states have internal predecessors, (138), 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 144 [2023-04-01 23:51:10,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:51:10,085 INFO L225 Difference]: With dead ends: 37596 [2023-04-01 23:51:10,086 INFO L226 Difference]: Without dead ends: 25418 [2023-04-01 23:51:10,105 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 23:51:10,110 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 5859 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 11344 mSolverCounterSat, 2113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5859 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 13457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2113 IncrementalHoareTripleChecker+Valid, 11344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:51:10,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5859 Valid, 956 Invalid, 13457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2113 Valid, 11344 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2023-04-01 23:51:10,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25418 states. [2023-04-01 23:51:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25418 to 23097. [2023-04-01 23:51:10,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23097 states, 22383 states have (on average 1.280302014922039) internal successors, (28657), 22485 states have internal predecessors, (28657), 92 states have call successors, (92), 92 states have call predecessors, (92), 621 states have return successors, (1845), 519 states have call predecessors, (1845), 91 states have call successors, (1845) [2023-04-01 23:51:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23097 states to 23097 states and 30594 transitions. [2023-04-01 23:51:10,513 INFO L78 Accepts]: Start accepts. Automaton has 23097 states and 30594 transitions. Word has length 144 [2023-04-01 23:51:10,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:51:10,514 INFO L495 AbstractCegarLoop]: Abstraction has 23097 states and 30594 transitions. [2023-04-01 23:51:10,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 23.0) internal successors, (138), 4 states have internal predecessors, (138), 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 23:51:10,514 INFO L276 IsEmpty]: Start isEmpty. Operand 23097 states and 30594 transitions. [2023-04-01 23:51:10,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-04-01 23:51:10,515 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:51:10,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:10,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 23:51:10,515 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:51:10,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:51:10,515 INFO L85 PathProgramCache]: Analyzing trace with hash -84398064, now seen corresponding path program 1 times [2023-04-01 23:51:10,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:51:10,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505922965] [2023-04-01 23:51:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:51:10,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:51:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:10,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:51:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:10,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:51:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:51:10,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:51:10,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505922965] [2023-04-01 23:51:10,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505922965] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:51:10,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:51:10,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:51:10,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488168722] [2023-04-01 23:51:10,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:51:10,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:51:10,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:51:10,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:51:10,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:51:10,872 INFO L87 Difference]: Start difference. First operand 23097 states and 30594 transitions. Second operand has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 4 states have internal predecessors, (145), 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 23:51:22,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:51:22,145 INFO L93 Difference]: Finished difference Result 71609 states and 98293 transitions. [2023-04-01 23:51:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:51:22,146 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 4 states have internal predecessors, (145), 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 151 [2023-04-01 23:51:22,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:51:22,259 INFO L225 Difference]: With dead ends: 71609 [2023-04-01 23:51:22,259 INFO L226 Difference]: Without dead ends: 48518 [2023-04-01 23:51:22,301 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 23:51:22,301 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 8119 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 11713 mSolverCounterSat, 2089 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8119 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 13802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2089 IncrementalHoareTripleChecker+Valid, 11713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:51:22,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8119 Valid, 1047 Invalid, 13802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2089 Valid, 11713 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2023-04-01 23:51:22,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48518 states. [2023-04-01 23:51:23,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48518 to 45399. [2023-04-01 23:51:23,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45399 states, 43518 states have (on average 1.1893469368996736) internal successors, (51758), 43847 states have internal predecessors, (51758), 176 states have call successors, (176), 176 states have call predecessors, (176), 1704 states have return successors, (6069), 1375 states have call predecessors, (6069), 175 states have call successors, (6069) [2023-04-01 23:51:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45399 states to 45399 states and 58003 transitions. [2023-04-01 23:51:23,193 INFO L78 Accepts]: Start accepts. Automaton has 45399 states and 58003 transitions. Word has length 151 [2023-04-01 23:51:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:51:23,193 INFO L495 AbstractCegarLoop]: Abstraction has 45399 states and 58003 transitions. [2023-04-01 23:51:23,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 4 states have internal predecessors, (145), 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 23:51:23,193 INFO L276 IsEmpty]: Start isEmpty. Operand 45399 states and 58003 transitions. [2023-04-01 23:51:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2023-04-01 23:51:23,202 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:51:23,203 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:23,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 23:51:23,203 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:51:23,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:51:23,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1733380356, now seen corresponding path program 1 times [2023-04-01 23:51:23,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:51:23,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337035282] [2023-04-01 23:51:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:51:23,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:51:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:23,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:51:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:23,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:51:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:23,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:51:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:24,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:51:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:24,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 601 [2023-04-01 23:51:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 23:51:24,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:51:24,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337035282] [2023-04-01 23:51:24,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337035282] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:51:24,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477655830] [2023-04-01 23:51:24,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:51:24,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:51:24,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:51:24,169 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 23:51:24,172 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 23:51:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:24,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:51:24,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:51:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:51:24,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:51:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:51:24,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477655830] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:51:24,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:51:24,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:51:24,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663741164] [2023-04-01 23:51:24,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:51:24,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:51:24,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:51:24,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:51:24,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:51:24,838 INFO L87 Difference]: Start difference. First operand 45399 states and 58003 transitions. Second operand has 11 states, 11 states have (on average 78.27272727272727) internal successors, (861), 9 states have internal predecessors, (861), 4 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 23:51:42,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:51:42,725 INFO L93 Difference]: Finished difference Result 173882 states and 245278 transitions. [2023-04-01 23:51:42,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 23:51:42,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 78.27272727272727) internal successors, (861), 9 states have internal predecessors, (861), 4 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 714 [2023-04-01 23:51:42,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:51:43,239 INFO L225 Difference]: With dead ends: 173882 [2023-04-01 23:51:43,239 INFO L226 Difference]: Without dead ends: 128489 [2023-04-01 23:51:43,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1464 GetRequests, 1438 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:51:43,311 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 8078 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 19507 mSolverCounterSat, 4543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8078 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 24050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4543 IncrementalHoareTripleChecker+Valid, 19507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:51:43,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8078 Valid, 1643 Invalid, 24050 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4543 Valid, 19507 Invalid, 0 Unknown, 0 Unchecked, 16.3s Time] [2023-04-01 23:51:43,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128489 states. [2023-04-01 23:51:45,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128489 to 123431. [2023-04-01 23:51:45,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123431 states, 118361 states have (on average 1.1383056919086523) internal successors, (134731), 119355 states have internal predecessors, (134731), 482 states have call successors, (482), 482 states have call predecessors, (482), 4587 states have return successors, (23922), 3593 states have call predecessors, (23922), 481 states have call successors, (23922) [2023-04-01 23:51:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123431 states to 123431 states and 159135 transitions. [2023-04-01 23:51:46,014 INFO L78 Accepts]: Start accepts. Automaton has 123431 states and 159135 transitions. Word has length 714 [2023-04-01 23:51:46,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:51:46,016 INFO L495 AbstractCegarLoop]: Abstraction has 123431 states and 159135 transitions. [2023-04-01 23:51:46,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 78.27272727272727) internal successors, (861), 9 states have internal predecessors, (861), 4 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 23:51:46,016 INFO L276 IsEmpty]: Start isEmpty. Operand 123431 states and 159135 transitions. [2023-04-01 23:51:46,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 919 [2023-04-01 23:51:46,137 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:51:46,138 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:46,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 23:51:46,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 23:51:46,339 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:51:46,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:51:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2080610782, now seen corresponding path program 1 times [2023-04-01 23:51:46,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:51:46,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143198988] [2023-04-01 23:51:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:51:46,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:51:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:47,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:51:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:47,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:51:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:47,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:51:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:47,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-01 23:51:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:47,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 719 [2023-04-01 23:51:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 435 proven. 2 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2023-04-01 23:51:47,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:51:47,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143198988] [2023-04-01 23:51:47,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143198988] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:51:47,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158502821] [2023-04-01 23:51:47,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:51:47,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:51:47,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:51:47,781 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 23:51:47,787 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 23:51:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:48,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:51:48,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:51:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 437 proven. 2 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2023-04-01 23:51:48,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:51:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 437 proven. 2 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2023-04-01 23:51:48,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158502821] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:51:48,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:51:48,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 23:51:48,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749509983] [2023-04-01 23:51:48,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:51:48,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:51:48,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:51:48,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:51:48,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:51:48,680 INFO L87 Difference]: Start difference. First operand 123431 states and 159135 transitions. Second operand has 12 states, 12 states have (on average 85.75) internal successors, (1029), 10 states have internal predecessors, (1029), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 23:52:09,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:52:09,503 INFO L93 Difference]: Finished difference Result 331039 states and 454634 transitions. [2023-04-01 23:52:09,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 23:52:09,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 85.75) internal successors, (1029), 10 states have internal predecessors, (1029), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 918 [2023-04-01 23:52:09,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:52:10,308 INFO L225 Difference]: With dead ends: 331039 [2023-04-01 23:52:10,309 INFO L226 Difference]: Without dead ends: 207614 [2023-04-01 23:52:10,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1878 GetRequests, 1853 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:52:10,425 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 15207 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 25380 mSolverCounterSat, 5642 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15207 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 31022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5642 IncrementalHoareTripleChecker+Valid, 25380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:52:10,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15207 Valid, 1656 Invalid, 31022 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5642 Valid, 25380 Invalid, 0 Unknown, 0 Unchecked, 18.1s Time] [2023-04-01 23:52:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207614 states. [2023-04-01 23:52:13,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207614 to 199792. [2023-04-01 23:52:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199792 states, 192626 states have (on average 1.1385119350451134) internal successors, (219307), 194056 states have internal predecessors, (219307), 794 states have call successors, (794), 794 states have call predecessors, (794), 6371 states have return successors, (46980), 4941 states have call predecessors, (46980), 793 states have call successors, (46980) [2023-04-01 23:52:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199792 states to 199792 states and 267081 transitions. [2023-04-01 23:52:14,516 INFO L78 Accepts]: Start accepts. Automaton has 199792 states and 267081 transitions. Word has length 918 [2023-04-01 23:52:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:52:14,518 INFO L495 AbstractCegarLoop]: Abstraction has 199792 states and 267081 transitions. [2023-04-01 23:52:14,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 85.75) internal successors, (1029), 10 states have internal predecessors, (1029), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 23:52:14,519 INFO L276 IsEmpty]: Start isEmpty. Operand 199792 states and 267081 transitions. [2023-04-01 23:52:14,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2023-04-01 23:52:14,597 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:52:14,597 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:52:14,604 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 23:52:14,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-04-01 23:52:14,803 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:52:14,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:52:14,803 INFO L85 PathProgramCache]: Analyzing trace with hash 901394279, now seen corresponding path program 1 times [2023-04-01 23:52:14,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:52:14,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632326206] [2023-04-01 23:52:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:52:14,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:52:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:16,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:52:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:16,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:52:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:16,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2023-04-01 23:52:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:16,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:52:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:16,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:52:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:16,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 845 [2023-04-01 23:52:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 269 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-04-01 23:52:16,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:52:16,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632326206] [2023-04-01 23:52:16,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632326206] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:52:16,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854131439] [2023-04-01 23:52:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:52:16,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:52:16,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:52:16,737 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 23:52:16,755 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 23:52:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:17,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:52:17,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:52:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 271 proven. 2 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-04-01 23:52:17,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:52:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 271 proven. 2 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-04-01 23:52:17,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854131439] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:52:17,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:52:17,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 23:52:17,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221110505] [2023-04-01 23:52:17,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:52:17,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:52:17,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:52:17,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:52:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:52:17,433 INFO L87 Difference]: Start difference. First operand 199792 states and 267081 transitions. Second operand has 12 states, 12 states have (on average 76.16666666666667) internal successors, (914), 10 states have internal predecessors, (914), 5 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 23:52:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:52:35,627 INFO L93 Difference]: Finished difference Result 459884 states and 623054 transitions. [2023-04-01 23:52:35,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 23:52:35,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 76.16666666666667) internal successors, (914), 10 states have internal predecessors, (914), 5 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 961 [2023-04-01 23:52:35,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:52:36,472 INFO L225 Difference]: With dead ends: 459884 [2023-04-01 23:52:36,473 INFO L226 Difference]: Without dead ends: 251061 [2023-04-01 23:52:36,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1969 GetRequests, 1943 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2023-04-01 23:52:36,769 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 10398 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 22057 mSolverCounterSat, 4789 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10415 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 26846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4789 IncrementalHoareTripleChecker+Valid, 22057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:52:36,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10415 Valid, 1158 Invalid, 26846 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4789 Valid, 22057 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time] [2023-04-01 23:52:36,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251061 states. [2023-04-01 23:52:40,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251061 to 246112. [2023-04-01 23:52:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246112 states, 237936 states have (on average 1.079723118821868) internal successors, (256905), 239494 states have internal predecessors, (256905), 1117 states have call successors, (1117), 986 states have call predecessors, (1117), 7058 states have return successors, (45042), 5631 states have call predecessors, (45042), 1116 states have call successors, (45042) [2023-04-01 23:52:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246112 states to 246112 states and 303064 transitions. [2023-04-01 23:52:41,233 INFO L78 Accepts]: Start accepts. Automaton has 246112 states and 303064 transitions. Word has length 961 [2023-04-01 23:52:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:52:41,234 INFO L495 AbstractCegarLoop]: Abstraction has 246112 states and 303064 transitions. [2023-04-01 23:52:41,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 76.16666666666667) internal successors, (914), 10 states have internal predecessors, (914), 5 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 23:52:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 246112 states and 303064 transitions. [2023-04-01 23:52:41,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1105 [2023-04-01 23:52:41,260 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:52:41,260 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:52:41,267 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 23:52:41,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:52:41,466 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:52:41,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:52:41,466 INFO L85 PathProgramCache]: Analyzing trace with hash 349438202, now seen corresponding path program 1 times [2023-04-01 23:52:41,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:52:41,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012775099] [2023-04-01 23:52:41,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:52:41,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:52:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:42,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:52:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:42,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:52:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:42,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:52:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:42,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-01 23:52:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:42,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 719 [2023-04-01 23:52:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:42,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 808 [2023-04-01 23:52:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:42,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 934 [2023-04-01 23:52:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 187 proven. 5 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-04-01 23:52:42,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:52:42,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012775099] [2023-04-01 23:52:42,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012775099] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:52:42,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621945500] [2023-04-01 23:52:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:52:42,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:52:42,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:52:42,497 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 23:52:42,501 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 23:52:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:42,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 1491 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:52:42,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:52:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 981 proven. 2 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2023-04-01 23:52:42,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:52:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 375 proven. 176 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2023-04-01 23:52:43,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621945500] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:52:43,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:52:43,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2023-04-01 23:52:43,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971285863] [2023-04-01 23:52:43,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:52:43,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:52:43,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:52:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:52:43,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:52:43,251 INFO L87 Difference]: Start difference. First operand 246112 states and 303064 transitions. Second operand has 12 states, 12 states have (on average 71.83333333333333) internal successors, (862), 10 states have internal predecessors, (862), 5 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 23:53:33,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:53:33,382 INFO L93 Difference]: Finished difference Result 1183249 states and 1631776 transitions. [2023-04-01 23:53:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 23:53:33,397 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 71.83333333333333) internal successors, (862), 10 states have internal predecessors, (862), 5 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 1104 [2023-04-01 23:53:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:53:38,106 INFO L225 Difference]: With dead ends: 1183249 [2023-04-01 23:53:38,106 INFO L226 Difference]: Without dead ends: 938530 [2023-04-01 23:53:38,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2300 GetRequests, 2250 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=1914, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 23:53:38,783 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 22305 mSDsluCounter, 1809 mSDsCounter, 0 mSdLazyCounter, 52755 mSolverCounterSat, 9725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22305 SdHoareTripleChecker+Valid, 2231 SdHoareTripleChecker+Invalid, 62480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 9725 IncrementalHoareTripleChecker+Valid, 52755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:53:38,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22305 Valid, 2231 Invalid, 62480 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [9725 Valid, 52755 Invalid, 0 Unknown, 0 Unchecked, 39.5s Time] [2023-04-01 23:53:39,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938530 states. [2023-04-01 23:53:53,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938530 to 929765. [2023-04-01 23:53:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929765 states, 910910 states have (on average 1.073104917060961) internal successors, (977502), 913688 states have internal predecessors, (977502), 4436 states have call successors, (4436), 3878 states have call predecessors, (4436), 14418 states have return successors, (202985), 12198 states have call predecessors, (202985), 4435 states have call successors, (202985)