/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/reducercommutativity/avg20-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:46:23,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:46:23,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:46:23,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 18:46:23,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 18:46:23,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 18:46:23,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 18:46:23,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 18:46:23,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 18:46:23,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 18:46:23,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 18:46:23,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 18:46:23,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 18:46:23,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 18:46:23,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 18:46:23,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 18:46:23,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 18:46:23,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 18:46:23,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 18:46:23,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 18:46:23,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 18:46:23,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 18:46:23,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 18:46:23,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 18:46:23,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 18:46:23,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 18:46:23,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 18:46:23,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 18:46:23,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 18:46:23,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 18:46:23,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 18:46:23,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 18:46:23,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 18:46:23,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 18:46:23,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 18:46:23,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 18:46:23,563 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 18:46:23,596 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:46:23,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:46:23,597 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:46:23,597 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:46:23,598 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:46:23,598 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:46:23,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:46:23,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:46:23,599 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:46:23,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:46:23,600 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:46:23,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:46:23,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:46:23,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:46:23,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:46:23,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:46:23,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:46:23,601 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:46:23,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:46:23,601 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:46:23,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:46:23,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:46:23,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:46:23,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:46:23,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:46:23,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:46:23,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:46:23,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:46:23,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:46:23,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:46:23,603 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:46:23,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:46:23,603 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:46:23,603 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:46:23,603 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:46:23,603 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:46:23,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:46:23,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:46:23,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:46:23,880 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:46:23,880 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:46:23,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/avg20-2.i [2023-04-01 18:46:25,070 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:46:25,244 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:46:25,244 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg20-2.i [2023-04-01 18:46:25,249 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e27ed445/8f02a39870f94de8b000a3b2401c89dc/FLAG018c9f24c [2023-04-01 18:46:25,266 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e27ed445/8f02a39870f94de8b000a3b2401c89dc [2023-04-01 18:46:25,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:46:25,269 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:46:25,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:46:25,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:46:25,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:46:25,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:46:25" (1/1) ... [2023-04-01 18:46:25,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22eaabcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:25, skipping insertion in model container [2023-04-01 18:46:25,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:46:25" (1/1) ... [2023-04-01 18:46:25,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:46:25,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:46:25,448 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/reducercommutativity/avg20-2.i[1282,1295] [2023-04-01 18:46:25,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:46:25,462 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:46:25,498 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/reducercommutativity/avg20-2.i[1282,1295] [2023-04-01 18:46:25,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:46:25,511 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:46:25,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:25 WrapperNode [2023-04-01 18:46:25,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:46:25,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:46:25,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:46:25,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:46:25,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:25" (1/1) ... [2023-04-01 18:46:25,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:25" (1/1) ... [2023-04-01 18:46:25,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:25" (1/1) ... [2023-04-01 18:46:25,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:25" (1/1) ... [2023-04-01 18:46:25,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:25" (1/1) ... [2023-04-01 18:46:25,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:25" (1/1) ... [2023-04-01 18:46:25,544 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:25" (1/1) ... [2023-04-01 18:46:25,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:25" (1/1) ... [2023-04-01 18:46:25,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:46:25,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:46:25,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:46:25,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:46:25,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:25" (1/1) ... [2023-04-01 18:46:25,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:46:25,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:25,575 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 18:46:25,581 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 18:46:25,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:46:25,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:46:25,618 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:46:25,619 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2023-04-01 18:46:25,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:46:25,619 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:46:25,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:46:25,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 18:46:25,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 18:46:25,619 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:46:25,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:46:25,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:46:25,620 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2023-04-01 18:46:25,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:46:25,620 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:46:25,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:46:25,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:46:25,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:46:25,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:46:25,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:46:25,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:46:25,678 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:46:25,679 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:46:25,928 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:46:25,934 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:46:25,934 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 18:46:25,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:46:25 BoogieIcfgContainer [2023-04-01 18:46:25,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:46:25,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:46:25,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:46:25,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:46:25,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:46:25" (1/3) ... [2023-04-01 18:46:25,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d53c27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:46:25, skipping insertion in model container [2023-04-01 18:46:25,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:25" (2/3) ... [2023-04-01 18:46:25,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d53c27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:46:25, skipping insertion in model container [2023-04-01 18:46:25,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:46:25" (3/3) ... [2023-04-01 18:46:25,946 INFO L112 eAbstractionObserver]: Analyzing ICFG avg20-2.i [2023-04-01 18:46:25,962 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:46:25,962 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:46:26,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:46:26,035 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;@23893d9a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:46:26,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:46:26,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 18:46:26,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 18:46:26,049 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:26,049 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:46:26,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:26,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash -56143050, now seen corresponding path program 1 times [2023-04-01 18:46:26,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:26,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324902967] [2023-04-01 18:46:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:26,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:26,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:26,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:46:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:26,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-01 18:46:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:26,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 18:46:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 18:46:26,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:26,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324902967] [2023-04-01 18:46:26,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324902967] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:46:26,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:46:26,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:46:26,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786923253] [2023-04-01 18:46:26,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:46:26,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:46:26,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:26,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:46:26,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:46:26,383 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 18:46:26,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:26,476 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2023-04-01 18:46:26,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:46:26,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-04-01 18:46:26,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:26,484 INFO L225 Difference]: With dead ends: 54 [2023-04-01 18:46:26,484 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 18:46:26,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:46:26,490 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:26,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 10 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:46:26,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 18:46:26,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-01 18:46:26,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:46:26,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-04-01 18:46:26,525 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2023-04-01 18:46:26,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:26,525 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-04-01 18:46:26,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 18:46:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-04-01 18:46:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 18:46:26,527 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:26,527 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:46:26,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:46:26,528 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:26,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:26,529 INFO L85 PathProgramCache]: Analyzing trace with hash 809042352, now seen corresponding path program 1 times [2023-04-01 18:46:26,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:26,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114528358] [2023-04-01 18:46:26,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:26,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:26,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:26,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:46:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:26,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-01 18:46:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:26,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 18:46:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 18:46:26,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:26,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114528358] [2023-04-01 18:46:26,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114528358] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:46:26,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831064636] [2023-04-01 18:46:26,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:26,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:26,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:26,722 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 18:46:26,749 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 18:46:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:26,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 18:46:26,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:46:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 18:46:26,891 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 18:46:26,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831064636] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:46:26,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 18:46:26,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 18:46:26,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694606217] [2023-04-01 18:46:26,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:46:26,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:46:26,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:26,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:46:26,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:46:26,897 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 18:46:26,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:26,911 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2023-04-01 18:46:26,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:46:26,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-04-01 18:46:26,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:26,916 INFO L225 Difference]: With dead ends: 46 [2023-04-01 18:46:26,916 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 18:46:26,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:46:26,919 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:26,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:46:26,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 18:46:26,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-04-01 18:46:26,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:46:26,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-04-01 18:46:26,935 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2023-04-01 18:46:26,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:26,936 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-04-01 18:46:26,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 18:46:26,936 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-04-01 18:46:26,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 18:46:26,938 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:26,938 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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 18:46:26,949 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 18:46:27,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:27,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:27,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:27,145 INFO L85 PathProgramCache]: Analyzing trace with hash -873205998, now seen corresponding path program 1 times [2023-04-01 18:46:27,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:27,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29373810] [2023-04-01 18:46:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:27,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:27,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:27,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 18:46:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:27,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-04-01 18:46:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:27,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 18:46:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 18:46:27,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:27,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29373810] [2023-04-01 18:46:27,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29373810] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:46:27,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932838056] [2023-04-01 18:46:27,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:27,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:27,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:27,363 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 18:46:27,391 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 18:46:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:27,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 18:46:27,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:46:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:46:27,446 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 18:46:27,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932838056] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:46:27,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 18:46:27,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-04-01 18:46:27,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836355724] [2023-04-01 18:46:27,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:46:27,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:46:27,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:27,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:46:27,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:46:27,449 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 18:46:27,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:27,461 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2023-04-01 18:46:27,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:46:27,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2023-04-01 18:46:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:27,463 INFO L225 Difference]: With dead ends: 46 [2023-04-01 18:46:27,463 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 18:46:27,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:46:27,464 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:27,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:46:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 18:46:27,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-04-01 18:46:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:46:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-01 18:46:27,471 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2023-04-01 18:46:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:27,471 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-01 18:46:27,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 18:46:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-01 18:46:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 18:46:27,473 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:27,473 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 18:46:27,483 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 18:46:27,678 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,SelfDestructingSolverStorable2 [2023-04-01 18:46:27,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:27,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:27,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1356290064, now seen corresponding path program 1 times [2023-04-01 18:46:27,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:27,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336885537] [2023-04-01 18:46:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:27,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:27,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:27,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 18:46:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:27,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-04-01 18:46:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:27,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 18:46:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 18:46:27,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:27,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336885537] [2023-04-01 18:46:27,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336885537] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:46:27,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158902245] [2023-04-01 18:46:27,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:27,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:27,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:27,805 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 18:46:27,833 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 18:46:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:27,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 18:46:27,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:46:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 18:46:27,917 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 18:46:27,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158902245] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:46:27,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 18:46:27,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 18:46:27,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611478403] [2023-04-01 18:46:27,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:46:27,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:46:27,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:27,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:46:27,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:46:27,919 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 18:46:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:27,938 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-04-01 18:46:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:46:27,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-04-01 18:46:27,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:27,940 INFO L225 Difference]: With dead ends: 43 [2023-04-01 18:46:27,940 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 18:46:27,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:46:27,943 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:27,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:46:27,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 18:46:27,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-04-01 18:46:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:46:27,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-04-01 18:46:27,958 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2023-04-01 18:46:27,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:27,959 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-04-01 18:46:27,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 18:46:27,960 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-04-01 18:46:27,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 18:46:27,963 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:27,963 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 18:46:27,975 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 18:46:28,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:28,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:28,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:28,177 INFO L85 PathProgramCache]: Analyzing trace with hash 820504686, now seen corresponding path program 1 times [2023-04-01 18:46:28,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:28,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988242661] [2023-04-01 18:46:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:28,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:28,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:28,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 18:46:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:28,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-04-01 18:46:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:28,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 18:46:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 18:46:28,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:28,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988242661] [2023-04-01 18:46:28,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988242661] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:46:28,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535745760] [2023-04-01 18:46:28,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:28,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:28,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:28,303 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 18:46:28,305 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 18:46:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:28,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:46:28,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:46:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 18:46:28,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:46:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 18:46:28,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535745760] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:46:28,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:46:28,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:46:28,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888894891] [2023-04-01 18:46:28,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:46:28,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:46:28,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:28,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:46:28,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:46:28,478 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 18:46:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:28,610 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-04-01 18:46:28,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:46:28,611 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2023-04-01 18:46:28,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:28,614 INFO L225 Difference]: With dead ends: 55 [2023-04-01 18:46:28,614 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 18:46:28,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 18:46:28,616 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:28,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 22 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:46:28,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 18:46:28,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-01 18:46:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:46:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-04-01 18:46:28,630 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 42 [2023-04-01 18:46:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:28,630 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-04-01 18:46:28,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 18:46:28,631 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-04-01 18:46:28,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 18:46:28,632 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:28,633 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 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 18:46:28,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 18:46:28,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:28,839 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:28,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:28,839 INFO L85 PathProgramCache]: Analyzing trace with hash 715769748, now seen corresponding path program 2 times [2023-04-01 18:46:28,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:28,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570941595] [2023-04-01 18:46:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:28,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:28,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:28,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:46:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:28,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 18:46:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:28,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 18:46:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 18:46:28,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:28,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570941595] [2023-04-01 18:46:28,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570941595] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:46:28,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853285456] [2023-04-01 18:46:28,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:46:28,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:28,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:28,953 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:46:28,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 18:46:29,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:46:29,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:46:29,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:46:29,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:46:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 18:46:29,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:46:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 18:46:29,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853285456] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:46:29,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:46:29,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-04-01 18:46:29,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688898884] [2023-04-01 18:46:29,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:46:29,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 18:46:29,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:29,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 18:46:29,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-04-01 18:46:29,211 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 18:46:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:29,455 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2023-04-01 18:46:29,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 18:46:29,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-04-01 18:46:29,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:29,458 INFO L225 Difference]: With dead ends: 70 [2023-04-01 18:46:29,458 INFO L226 Difference]: Without dead ends: 50 [2023-04-01 18:46:29,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2023-04-01 18:46:29,460 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:29,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 22 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:46:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-01 18:46:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-04-01 18:46:29,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:46:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2023-04-01 18:46:29,473 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 48 [2023-04-01 18:46:29,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:29,473 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2023-04-01 18:46:29,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 18:46:29,474 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2023-04-01 18:46:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 18:46:29,480 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:29,480 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 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 18:46:29,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 18:46:29,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:29,686 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:29,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:29,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1150751298, now seen corresponding path program 3 times [2023-04-01 18:46:29,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:29,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507769960] [2023-04-01 18:46:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:29,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:29,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:29,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 18:46:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:29,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-04-01 18:46:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:29,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 18:46:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2023-04-01 18:46:29,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:29,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507769960] [2023-04-01 18:46:29,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507769960] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:46:29,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556601605] [2023-04-01 18:46:29,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:46:29,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:29,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:29,790 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:46:29,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 18:46:29,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 18:46:29,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:46:29,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:46:29,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:46:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2023-04-01 18:46:29,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:46:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2023-04-01 18:46:29,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556601605] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:46:29,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:46:29,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:46:29,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346689428] [2023-04-01 18:46:29,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:46:29,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:46:29,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:29,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:46:29,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:46:29,925 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 18:46:30,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:30,044 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2023-04-01 18:46:30,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:46:30,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2023-04-01 18:46:30,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:30,046 INFO L225 Difference]: With dead ends: 70 [2023-04-01 18:46:30,046 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 18:46:30,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 18:46:30,047 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:30,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 27 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:46:30,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 18:46:30,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-04-01 18:46:30,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:46:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2023-04-01 18:46:30,059 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 66 [2023-04-01 18:46:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:30,060 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2023-04-01 18:46:30,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 18:46:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2023-04-01 18:46:30,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 18:46:30,061 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:30,061 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:46:30,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 18:46:30,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:30,267 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:30,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1303232968, now seen corresponding path program 4 times [2023-04-01 18:46:30,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:30,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531617845] [2023-04-01 18:46:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:30,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:30,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:30,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:30,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 18:46:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:30,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-04-01 18:46:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:30,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 18:46:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-04-01 18:46:30,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:30,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531617845] [2023-04-01 18:46:30,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531617845] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:46:30,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697993199] [2023-04-01 18:46:30,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:46:30,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:30,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:30,520 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:46:30,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 18:46:30,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:46:30,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:46:30,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 18:46:30,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:46:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-04-01 18:46:30,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:46:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-04-01 18:46:30,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697993199] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:46:30,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:46:30,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2023-04-01 18:46:30,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68950950] [2023-04-01 18:46:30,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:46:30,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 18:46:30,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:30,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 18:46:30,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-04-01 18:46:30,714 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 18:46:31,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:31,016 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2023-04-01 18:46:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 18:46:31,017 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2023-04-01 18:46:31,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:31,017 INFO L225 Difference]: With dead ends: 94 [2023-04-01 18:46:31,017 INFO L226 Difference]: Without dead ends: 66 [2023-04-01 18:46:31,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 18:46:31,019 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:31,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 27 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:46:31,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-01 18:46:31,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2023-04-01 18:46:31,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:46:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2023-04-01 18:46:31,028 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 72 [2023-04-01 18:46:31,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:31,028 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2023-04-01 18:46:31,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 18:46:31,028 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2023-04-01 18:46:31,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-01 18:46:31,029 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:31,029 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:46:31,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 18:46:31,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:31,235 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:31,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:31,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1213572626, now seen corresponding path program 5 times [2023-04-01 18:46:31,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:31,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535590203] [2023-04-01 18:46:31,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:31,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:31,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:31,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 18:46:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:31,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-04-01 18:46:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:31,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-04-01 18:46:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2023-04-01 18:46:31,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:31,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535590203] [2023-04-01 18:46:31,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535590203] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:46:31,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991504658] [2023-04-01 18:46:31,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:46:31,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:31,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:31,517 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:46:31,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 18:46:32,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-04-01 18:46:32,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:46:32,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 18:46:32,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:46:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2023-04-01 18:46:32,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:46:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-04-01 18:46:32,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991504658] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:46:32,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:46:32,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-04-01 18:46:32,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293102629] [2023-04-01 18:46:32,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:46:32,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 18:46:32,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:32,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 18:46:32,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-04-01 18:46:32,738 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 18:46:33,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:33,246 INFO L93 Difference]: Finished difference Result 120 states and 139 transitions. [2023-04-01 18:46:33,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 18:46:33,247 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 98 [2023-04-01 18:46:33,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:33,248 INFO L225 Difference]: With dead ends: 120 [2023-04-01 18:46:33,248 INFO L226 Difference]: Without dead ends: 84 [2023-04-01 18:46:33,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 18:46:33,250 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 76 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:33,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 37 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:46:33,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-04-01 18:46:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2023-04-01 18:46:33,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:46:33,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2023-04-01 18:46:33,258 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 98 [2023-04-01 18:46:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:33,259 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2023-04-01 18:46:33,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 18:46:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2023-04-01 18:46:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-01 18:46:33,260 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:33,260 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:46:33,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 18:46:33,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 18:46:33,468 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:33,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:33,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2081093604, now seen corresponding path program 6 times [2023-04-01 18:46:33,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:33,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352271145] [2023-04-01 18:46:33,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:33,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:33,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:33,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 18:46:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:33,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-04-01 18:46:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:33,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-04-01 18:46:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1879 trivial. 0 not checked. [2023-04-01 18:46:33,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:33,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352271145] [2023-04-01 18:46:33,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352271145] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:46:33,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452521015] [2023-04-01 18:46:33,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 18:46:33,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:33,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:33,885 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:46:33,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 18:46:34,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-04-01 18:46:34,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:46:34,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:46:34,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:46:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 850 proven. 16 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2023-04-01 18:46:34,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:46:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2007 trivial. 0 not checked. [2023-04-01 18:46:34,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452521015] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:46:34,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:46:34,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 26 [2023-04-01 18:46:34,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131011984] [2023-04-01 18:46:34,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:46:34,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 18:46:34,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:34,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 18:46:34,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2023-04-01 18:46:34,343 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 18:46:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:34,794 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2023-04-01 18:46:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 18:46:34,795 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 148 [2023-04-01 18:46:34,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:34,796 INFO L225 Difference]: With dead ends: 150 [2023-04-01 18:46:34,796 INFO L226 Difference]: Without dead ends: 98 [2023-04-01 18:46:34,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=510, Invalid=1842, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 18:46:34,798 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:34,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 42 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:46:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-01 18:46:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2023-04-01 18:46:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:46:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2023-04-01 18:46:34,807 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 148 [2023-04-01 18:46:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:34,808 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2023-04-01 18:46:34,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 18:46:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2023-04-01 18:46:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 18:46:34,809 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:34,809 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:46:34,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 18:46:35,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 18:46:35,016 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:35,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:35,016 INFO L85 PathProgramCache]: Analyzing trace with hash 803592634, now seen corresponding path program 7 times [2023-04-01 18:46:35,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:35,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837939436] [2023-04-01 18:46:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:35,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:35,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:35,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 18:46:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:35,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-04-01 18:46:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:35,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 18:46:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-04-01 18:46:35,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:35,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837939436] [2023-04-01 18:46:35,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837939436] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:46:35,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64059190] [2023-04-01 18:46:35,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 18:46:35,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:35,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:35,458 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:46:35,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 18:46:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:35,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 18:46:35,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:46:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-04-01 18:46:35,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:46:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-04-01 18:46:35,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64059190] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:46:35,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:46:35,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2023-04-01 18:46:35,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795202489] [2023-04-01 18:46:35,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:46:35,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 18:46:35,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:35,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 18:46:35,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2023-04-01 18:46:35,883 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 18:46:36,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:36,283 INFO L93 Difference]: Finished difference Result 175 states and 189 transitions. [2023-04-01 18:46:36,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 18:46:36,284 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 162 [2023-04-01 18:46:36,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:36,284 INFO L225 Difference]: With dead ends: 175 [2023-04-01 18:46:36,284 INFO L226 Difference]: Without dead ends: 111 [2023-04-01 18:46:36,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 317 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=716, Invalid=1176, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 18:46:36,286 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 62 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:36,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 42 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:46:36,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-01 18:46:36,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2023-04-01 18:46:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:46:36,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2023-04-01 18:46:36,297 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 162 [2023-04-01 18:46:36,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:36,297 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2023-04-01 18:46:36,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 18:46:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2023-04-01 18:46:36,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-04-01 18:46:36,299 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:36,299 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 20, 20, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:46:36,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 18:46:36,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 18:46:36,505 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:36,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:36,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2147330408, now seen corresponding path program 8 times [2023-04-01 18:46:36,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:36,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464083622] [2023-04-01 18:46:36,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:36,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:36,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:36,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-04-01 18:46:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:37,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-04-01 18:46:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:37,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-04-01 18:46:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 1319 trivial. 0 not checked. [2023-04-01 18:46:37,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:37,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464083622] [2023-04-01 18:46:37,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464083622] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:46:37,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888991810] [2023-04-01 18:46:37,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:46:37,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:37,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:37,051 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:46:37,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 18:46:37,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:46:37,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:46:37,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 18:46:37,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:46:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 844 proven. 196 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2023-04-01 18:46:37,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:46:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 1319 trivial. 0 not checked. [2023-04-01 18:46:37,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888991810] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:46:37,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:46:37,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 23 [2023-04-01 18:46:37,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259575017] [2023-04-01 18:46:37,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:46:37,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 18:46:37,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:37,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 18:46:37,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2023-04-01 18:46:37,492 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 18:46:37,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:37,873 INFO L93 Difference]: Finished difference Result 186 states and 201 transitions. [2023-04-01 18:46:37,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 18:46:37,873 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 176 [2023-04-01 18:46:37,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:37,875 INFO L225 Difference]: With dead ends: 186 [2023-04-01 18:46:37,875 INFO L226 Difference]: Without dead ends: 123 [2023-04-01 18:46:37,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 345 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 18:46:37,876 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 62 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:37,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 42 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:46:37,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-04-01 18:46:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2023-04-01 18:46:37,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:46:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2023-04-01 18:46:37,884 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 176 [2023-04-01 18:46:37,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:37,884 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2023-04-01 18:46:37,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 18:46:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2023-04-01 18:46:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-04-01 18:46:37,886 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:37,886 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 20, 20, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:46:37,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 18:46:38,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 18:46:38,099 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:38,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:38,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1681278492, now seen corresponding path program 9 times [2023-04-01 18:46:38,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:38,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252871514] [2023-04-01 18:46:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:38,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:38,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:46:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:38,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-04-01 18:46:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:38,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-04-01 18:46:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:38,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2023-04-01 18:46:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:46:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4135 trivial. 0 not checked. [2023-04-01 18:46:38,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:46:38,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252871514] [2023-04-01 18:46:38,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252871514] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:46:38,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996575145] [2023-04-01 18:46:38,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:46:38,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:46:38,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:46:38,497 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:46:38,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 18:46:39,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-04-01 18:46:39,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:46:39,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:46:39,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:46:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 1690 proven. 100 refuted. 0 times theorem prover too weak. 2445 trivial. 0 not checked. [2023-04-01 18:46:39,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:46:39,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4135 trivial. 0 not checked. [2023-04-01 18:46:39,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996575145] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:46:39,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:46:39,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 23 [2023-04-01 18:46:39,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465984629] [2023-04-01 18:46:39,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:46:39,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 18:46:39,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:46:39,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 18:46:39,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2023-04-01 18:46:39,905 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 18:46:40,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:46:40,224 INFO L93 Difference]: Finished difference Result 192 states and 205 transitions. [2023-04-01 18:46:40,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 18:46:40,225 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 212 [2023-04-01 18:46:40,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:46:40,226 INFO L225 Difference]: With dead ends: 192 [2023-04-01 18:46:40,226 INFO L226 Difference]: Without dead ends: 141 [2023-04-01 18:46:40,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 420 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=652, Invalid=1070, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 18:46:40,227 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 60 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:46:40,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 37 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:46:40,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-04-01 18:46:40,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2023-04-01 18:46:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:46:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2023-04-01 18:46:40,236 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 212 [2023-04-01 18:46:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:46:40,236 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2023-04-01 18:46:40,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 18:46:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2023-04-01 18:46:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-01 18:46:40,238 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:46:40,238 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:46:40,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 18:46:40,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 18:46:40,449 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:46:40,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:46:40,450 INFO L85 PathProgramCache]: Analyzing trace with hash -456703606, now seen corresponding path program 10 times [2023-04-01 18:46:40,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:46:40,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387034770] [2023-04-01 18:46:40,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:46:40,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:46:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat