/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:59:17,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:59:17,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:59:17,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:59:17,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:59:17,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:59:17,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:59:17,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:59:17,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:59:17,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:59:17,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:59:17,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:59:17,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:59:17,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:59:17,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:59:17,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:59:17,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:59:17,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:59:17,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:59:17,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:59:17,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:59:17,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:59:17,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:59:17,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:59:17,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:59:17,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 19:59:17,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 19:59:17,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 19:59:17,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 19:59:17,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 19:59:17,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 19:59:17,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 19:59:17,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 19:59:17,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:59:17,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:59:17,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:59:17,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 19:59:17,281 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:59:17,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:59:17,282 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:59:17,282 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:59:17,282 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:59:17,282 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:59:17,282 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:59:17,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:59:17,283 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:59:17,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:59:17,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:59:17,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:59:17,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:59:17,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:59:17,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:59:17,283 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:59:17,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:59:17,284 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:59:17,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:59:17,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:59:17,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:59:17,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:59:17,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:59:17,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:59:17,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:59:17,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:59:17,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:59:17,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:59:17,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:59:17,285 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:59:17,285 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:59:17,285 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:59:17,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:59:17,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:59:17,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:59:17,432 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:59:17,432 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:59:17,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-01-27 19:59:18,430 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:59:18,612 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:59:18,612 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-01-27 19:59:18,616 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8718f120/a1e7a298b1ba4cc1aa19e8ced67c5e6d/FLAG5e31bd9db [2023-01-27 19:59:18,627 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8718f120/a1e7a298b1ba4cc1aa19e8ced67c5e6d [2023-01-27 19:59:18,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:59:18,630 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:59:18,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:59:18,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:59:18,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:59:18,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:59:18" (1/1) ... [2023-01-27 19:59:18,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@241c3784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:59:18, skipping insertion in model container [2023-01-27 19:59:18,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:59:18" (1/1) ... [2023-01-27 19:59:18,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:59:18,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:59:18,757 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c[2482,2495] [2023-01-27 19:59:18,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:59:18,771 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:59:18,800 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c[2482,2495] [2023-01-27 19:59:18,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:59:18,812 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:59:18,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:59:18 WrapperNode [2023-01-27 19:59:18,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:59:18,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:59:18,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:59:18,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:59:18,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:59:18" (1/1) ... [2023-01-27 19:59:18,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:59:18" (1/1) ... [2023-01-27 19:59:18,840 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 202 [2023-01-27 19:59:18,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:59:18,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:59:18,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:59:18,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:59:18,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:59:18" (1/1) ... [2023-01-27 19:59:18,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:59:18" (1/1) ... [2023-01-27 19:59:18,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:59:18" (1/1) ... [2023-01-27 19:59:18,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:59:18" (1/1) ... [2023-01-27 19:59:18,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:59:18" (1/1) ... [2023-01-27 19:59:18,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:59:18" (1/1) ... [2023-01-27 19:59:18,857 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:59:18" (1/1) ... [2023-01-27 19:59:18,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:59:18" (1/1) ... [2023-01-27 19:59:18,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:59:18,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:59:18,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:59:18,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:59:18,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:59:18" (1/1) ... [2023-01-27 19:59:18,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:59:18,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:59:18,882 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) [2023-01-27 19:59:18,884 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 [2023-01-27 19:59:18,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:59:18,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:59:18,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:59:18,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:59:18,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 19:59:18,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 19:59:18,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 19:59:18,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 19:59:18,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:59:18,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 19:59:18,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:59:18,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:59:18,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:59:18,906 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 19:59:18,993 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:59:18,994 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:59:19,335 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:59:19,342 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:59:19,343 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-27 19:59:19,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:59:19 BoogieIcfgContainer [2023-01-27 19:59:19,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:59:19,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:59:19,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:59:19,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:59:19,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:59:18" (1/3) ... [2023-01-27 19:59:19,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa2f861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:59:19, skipping insertion in model container [2023-01-27 19:59:19,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:59:18" (2/3) ... [2023-01-27 19:59:19,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa2f861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:59:19, skipping insertion in model container [2023-01-27 19:59:19,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:59:19" (3/3) ... [2023-01-27 19:59:19,350 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2023-01-27 19:59:19,362 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:59:19,363 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 19:59:19,363 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:59:19,445 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:59:19,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 478 flow [2023-01-27 19:59:19,543 INFO L130 PetriNetUnfolder]: 21/229 cut-off events. [2023-01-27 19:59:19,543 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 19:59:19,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 229 events. 21/229 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 310 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 150. Up to 3 conditions per place. [2023-01-27 19:59:19,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 231 transitions, 478 flow [2023-01-27 19:59:19,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 221 transitions, 454 flow [2023-01-27 19:59:19,560 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:59:19,575 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 221 transitions, 454 flow [2023-01-27 19:59:19,577 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 221 transitions, 454 flow [2023-01-27 19:59:19,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 221 transitions, 454 flow [2023-01-27 19:59:19,634 INFO L130 PetriNetUnfolder]: 21/221 cut-off events. [2023-01-27 19:59:19,634 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 19:59:19,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 221 events. 21/221 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 310 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 150. Up to 3 conditions per place. [2023-01-27 19:59:19,641 INFO L119 LiptonReduction]: Number of co-enabled transitions 5192 [2023-01-27 19:59:24,421 INFO L134 LiptonReduction]: Checked pairs total: 5413 [2023-01-27 19:59:24,421 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-01-27 19:59:24,454 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:59:24,460 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=false, 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;@45f6512d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:59:24,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 19:59:24,468 INFO L130 PetriNetUnfolder]: 5/22 cut-off events. [2023-01-27 19:59:24,468 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 19:59:24,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:24,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:24,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:24,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:24,474 INFO L85 PathProgramCache]: Analyzing trace with hash 40498280, now seen corresponding path program 1 times [2023-01-27 19:59:24,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:24,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70626798] [2023-01-27 19:59:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:24,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:25,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:25,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70626798] [2023-01-27 19:59:25,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70626798] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:59:25,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:59:25,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 19:59:25,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407072683] [2023-01-27 19:59:25,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:59:25,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:59:25,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:59:25,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:59:25,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:59:25,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 483 [2023-01-27 19:59:25,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 165.14285714285714) internal successors, (1156), 7 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:25,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:59:25,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 483 [2023-01-27 19:59:25,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:59:25,391 INFO L130 PetriNetUnfolder]: 177/320 cut-off events. [2023-01-27 19:59:25,391 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-01-27 19:59:25,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 320 events. 177/320 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1171 event pairs, 20 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 320. Up to 134 conditions per place. [2023-01-27 19:59:25,394 INFO L137 encePairwiseOnDemand]: 475/483 looper letters, 60 selfloop transitions, 10 changer transitions 4/74 dead transitions. [2023-01-27 19:59:25,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 74 transitions, 335 flow [2023-01-27 19:59:25,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 19:59:25,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 19:59:25,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1381 transitions. [2023-01-27 19:59:25,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3574016563146998 [2023-01-27 19:59:25,411 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1381 transitions. [2023-01-27 19:59:25,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1381 transitions. [2023-01-27 19:59:25,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:59:25,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1381 transitions. [2023-01-27 19:59:25,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 172.625) internal successors, (1381), 8 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:25,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:25,430 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:25,431 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 8 states and 1381 transitions. [2023-01-27 19:59:25,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 74 transitions, 335 flow [2023-01-27 19:59:25,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 74 transitions, 309 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 19:59:25,444 INFO L231 Difference]: Finished difference. Result has 31 places, 32 transitions, 113 flow [2023-01-27 19:59:25,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=113, PETRI_PLACES=31, PETRI_TRANSITIONS=32} [2023-01-27 19:59:25,447 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2023-01-27 19:59:25,447 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 32 transitions, 113 flow [2023-01-27 19:59:25,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.14285714285714) internal successors, (1156), 7 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:25,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:25,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:25,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:59:25,448 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:25,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:25,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1445248948, now seen corresponding path program 2 times [2023-01-27 19:59:25,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:25,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920009460] [2023-01-27 19:59:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:25,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:25,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:25,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920009460] [2023-01-27 19:59:25,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920009460] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:59:25,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:59:25,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 19:59:25,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978763263] [2023-01-27 19:59:25,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:59:25,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:59:25,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:59:25,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:59:25,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:59:25,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 483 [2023-01-27 19:59:25,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 113 flow. Second operand has 7 states, 7 states have (on average 165.14285714285714) internal successors, (1156), 7 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:25,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:59:25,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 483 [2023-01-27 19:59:25,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:59:25,789 INFO L130 PetriNetUnfolder]: 182/340 cut-off events. [2023-01-27 19:59:25,789 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-01-27 19:59:25,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 814 conditions, 340 events. 182/340 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1316 event pairs, 22 based on Foata normal form. 1/297 useless extension candidates. Maximal degree in co-relation 527. Up to 134 conditions per place. [2023-01-27 19:59:25,791 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 54 selfloop transitions, 12 changer transitions 8/74 dead transitions. [2023-01-27 19:59:25,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 74 transitions, 365 flow [2023-01-27 19:59:25,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 19:59:25,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 19:59:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1378 transitions. [2023-01-27 19:59:25,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35662525879917184 [2023-01-27 19:59:25,794 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1378 transitions. [2023-01-27 19:59:25,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1378 transitions. [2023-01-27 19:59:25,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:59:25,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1378 transitions. [2023-01-27 19:59:25,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 172.25) internal successors, (1378), 8 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:25,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:25,802 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:25,802 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 113 flow. Second operand 8 states and 1378 transitions. [2023-01-27 19:59:25,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 74 transitions, 365 flow [2023-01-27 19:59:25,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 74 transitions, 363 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-27 19:59:25,805 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 161 flow [2023-01-27 19:59:25,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=161, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-01-27 19:59:25,806 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2023-01-27 19:59:25,806 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 161 flow [2023-01-27 19:59:25,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.14285714285714) internal successors, (1156), 7 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:25,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:25,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:25,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:59:25,807 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:25,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:25,807 INFO L85 PathProgramCache]: Analyzing trace with hash 168744916, now seen corresponding path program 1 times [2023-01-27 19:59:25,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:25,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204152704] [2023-01-27 19:59:25,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:25,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:25,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:25,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204152704] [2023-01-27 19:59:25,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204152704] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:59:25,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952606356] [2023-01-27 19:59:25,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:25,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:25,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:59:25,955 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) [2023-01-27 19:59:25,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 19:59:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:26,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-27 19:59:26,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:59:26,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:26,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 145 [2023-01-27 19:59:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:26,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:59:26,812 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:26,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 165 [2023-01-27 19:59:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:26,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952606356] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:59:26,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:59:26,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-27 19:59:26,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307179109] [2023-01-27 19:59:26,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:59:26,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 19:59:26,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:59:26,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 19:59:26,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-01-27 19:59:26,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 483 [2023-01-27 19:59:26,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 161 flow. Second operand has 20 states, 20 states have (on average 164.9) internal successors, (3298), 20 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:26,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:59:26,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 483 [2023-01-27 19:59:26,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:59:27,697 INFO L130 PetriNetUnfolder]: 497/913 cut-off events. [2023-01-27 19:59:27,697 INFO L131 PetriNetUnfolder]: For 583/583 co-relation queries the response was YES. [2023-01-27 19:59:27,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2334 conditions, 913 events. 497/913 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4453 event pairs, 190 based on Foata normal form. 26/827 useless extension candidates. Maximal degree in co-relation 2101. Up to 333 conditions per place. [2023-01-27 19:59:27,701 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 115 selfloop transitions, 24 changer transitions 8/147 dead transitions. [2023-01-27 19:59:27,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 147 transitions, 805 flow [2023-01-27 19:59:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 19:59:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 19:59:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2743 transitions. [2023-01-27 19:59:27,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3549430641821946 [2023-01-27 19:59:27,707 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2743 transitions. [2023-01-27 19:59:27,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2743 transitions. [2023-01-27 19:59:27,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:59:27,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2743 transitions. [2023-01-27 19:59:27,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 171.4375) internal successors, (2743), 16 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:27,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 483.0) internal successors, (8211), 17 states have internal predecessors, (8211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:27,720 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 483.0) internal successors, (8211), 17 states have internal predecessors, (8211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:27,720 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 161 flow. Second operand 16 states and 2743 transitions. [2023-01-27 19:59:27,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 147 transitions, 805 flow [2023-01-27 19:59:27,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 147 transitions, 788 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-01-27 19:59:27,724 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 333 flow [2023-01-27 19:59:27,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=333, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2023-01-27 19:59:27,725 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 34 predicate places. [2023-01-27 19:59:27,725 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 333 flow [2023-01-27 19:59:27,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 164.9) internal successors, (3298), 20 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:27,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:27,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:27,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 19:59:27,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:27,931 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:27,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:27,932 INFO L85 PathProgramCache]: Analyzing trace with hash 924557380, now seen corresponding path program 2 times [2023-01-27 19:59:27,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:27,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238597317] [2023-01-27 19:59:27,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:27,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:28,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:28,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238597317] [2023-01-27 19:59:28,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238597317] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:59:28,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782259314] [2023-01-27 19:59:28,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:59:28,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:28,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:59:28,121 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) [2023-01-27 19:59:28,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 19:59:28,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 19:59:28,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:59:28,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-27 19:59:28,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:59:28,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:28,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 107 [2023-01-27 19:59:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:59:28,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:59:28,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782259314] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:59:28,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:59:28,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-01-27 19:59:28,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870050984] [2023-01-27 19:59:28,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:59:28,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:59:28,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:59:28,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:59:28,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-01-27 19:59:28,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 483 [2023-01-27 19:59:28,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 333 flow. Second operand has 7 states, 7 states have (on average 165.28571428571428) internal successors, (1157), 7 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:28,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:59:28,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 483 [2023-01-27 19:59:28,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:59:28,637 INFO L130 PetriNetUnfolder]: 559/1071 cut-off events. [2023-01-27 19:59:28,637 INFO L131 PetriNetUnfolder]: For 1615/1615 co-relation queries the response was YES. [2023-01-27 19:59:28,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3020 conditions, 1071 events. 559/1071 cut-off events. For 1615/1615 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5746 event pairs, 88 based on Foata normal form. 38/975 useless extension candidates. Maximal degree in co-relation 2599. Up to 457 conditions per place. [2023-01-27 19:59:28,641 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 72 selfloop transitions, 30 changer transitions 6/108 dead transitions. [2023-01-27 19:59:28,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 108 transitions, 741 flow [2023-01-27 19:59:28,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 19:59:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 19:59:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1379 transitions. [2023-01-27 19:59:28,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35688405797101447 [2023-01-27 19:59:28,645 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1379 transitions. [2023-01-27 19:59:28,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1379 transitions. [2023-01-27 19:59:28,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:59:28,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1379 transitions. [2023-01-27 19:59:28,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 172.375) internal successors, (1379), 8 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:28,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:28,652 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:28,652 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 333 flow. Second operand 8 states and 1379 transitions. [2023-01-27 19:59:28,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 108 transitions, 741 flow [2023-01-27 19:59:28,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 108 transitions, 698 flow, removed 20 selfloop flow, removed 1 redundant places. [2023-01-27 19:59:28,661 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 497 flow [2023-01-27 19:59:28,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=497, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2023-01-27 19:59:28,662 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 44 predicate places. [2023-01-27 19:59:28,662 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 497 flow [2023-01-27 19:59:28,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.28571428571428) internal successors, (1157), 7 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:28,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:28,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:28,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-27 19:59:28,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-01-27 19:59:28,867 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:28,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:28,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1125552358, now seen corresponding path program 1 times [2023-01-27 19:59:28,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:28,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363261558] [2023-01-27 19:59:28,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:28,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:29,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:29,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363261558] [2023-01-27 19:59:29,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363261558] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:59:29,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605648462] [2023-01-27 19:59:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:29,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:29,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:59:29,026 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) [2023-01-27 19:59:29,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 19:59:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:29,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 19:59:29,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:59:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:29,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:59:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:29,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605648462] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 19:59:29,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 19:59:29,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-01-27 19:59:29,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088318066] [2023-01-27 19:59:29,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:59:29,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:59:29,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:59:29,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:59:29,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-01-27 19:59:29,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 483 [2023-01-27 19:59:29,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 497 flow. Second operand has 7 states, 7 states have (on average 172.42857142857142) internal successors, (1207), 7 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:29,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:59:29,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 483 [2023-01-27 19:59:29,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:59:29,507 INFO L130 PetriNetUnfolder]: 599/1159 cut-off events. [2023-01-27 19:59:29,507 INFO L131 PetriNetUnfolder]: For 2711/2711 co-relation queries the response was YES. [2023-01-27 19:59:29,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3574 conditions, 1159 events. 599/1159 cut-off events. For 2711/2711 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6308 event pairs, 194 based on Foata normal form. 0/1027 useless extension candidates. Maximal degree in co-relation 3090. Up to 234 conditions per place. [2023-01-27 19:59:29,512 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 102 selfloop transitions, 17 changer transitions 8/127 dead transitions. [2023-01-27 19:59:29,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 127 transitions, 980 flow [2023-01-27 19:59:29,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 19:59:29,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 19:59:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1791 transitions. [2023-01-27 19:59:29,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37080745341614907 [2023-01-27 19:59:29,516 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1791 transitions. [2023-01-27 19:59:29,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1791 transitions. [2023-01-27 19:59:29,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:59:29,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1791 transitions. [2023-01-27 19:59:29,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 179.1) internal successors, (1791), 10 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:29,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:29,524 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:29,524 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 497 flow. Second operand 10 states and 1791 transitions. [2023-01-27 19:59:29,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 127 transitions, 980 flow [2023-01-27 19:59:29,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 127 transitions, 969 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-27 19:59:29,530 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 550 flow [2023-01-27 19:59:29,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=550, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2023-01-27 19:59:29,530 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 54 predicate places. [2023-01-27 19:59:29,530 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 550 flow [2023-01-27 19:59:29,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 172.42857142857142) internal successors, (1207), 7 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:29,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:29,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:29,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-27 19:59:29,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:29,736 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:29,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:29,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1919531260, now seen corresponding path program 1 times [2023-01-27 19:59:29,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:29,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513299118] [2023-01-27 19:59:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:29,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:29,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:29,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513299118] [2023-01-27 19:59:29,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513299118] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:59:29,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:59:29,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 19:59:29,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248185091] [2023-01-27 19:59:29,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:59:29,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 19:59:29,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:59:29,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 19:59:29,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:59:29,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 483 [2023-01-27 19:59:29,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 550 flow. Second operand has 5 states, 5 states have (on average 176.6) internal successors, (883), 5 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:29,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:59:29,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 483 [2023-01-27 19:59:29,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:59:29,913 INFO L130 PetriNetUnfolder]: 463/919 cut-off events. [2023-01-27 19:59:29,913 INFO L131 PetriNetUnfolder]: For 2411/2411 co-relation queries the response was YES. [2023-01-27 19:59:29,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3081 conditions, 919 events. 463/919 cut-off events. For 2411/2411 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4733 event pairs, 314 based on Foata normal form. 24/942 useless extension candidates. Maximal degree in co-relation 2854. Up to 766 conditions per place. [2023-01-27 19:59:29,917 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 52 selfloop transitions, 2 changer transitions 26/80 dead transitions. [2023-01-27 19:59:29,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 685 flow [2023-01-27 19:59:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 19:59:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 19:59:29,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 909 transitions. [2023-01-27 19:59:29,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763975155279503 [2023-01-27 19:59:29,919 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 909 transitions. [2023-01-27 19:59:29,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 909 transitions. [2023-01-27 19:59:29,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:59:29,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 909 transitions. [2023-01-27 19:59:29,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 181.8) internal successors, (909), 5 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:29,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 483.0) internal successors, (2898), 6 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:29,924 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 483.0) internal successors, (2898), 6 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:29,924 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 550 flow. Second operand 5 states and 909 transitions. [2023-01-27 19:59:29,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 685 flow [2023-01-27 19:59:29,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 80 transitions, 635 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-01-27 19:59:29,929 INFO L231 Difference]: Finished difference. Result has 74 places, 54 transitions, 343 flow [2023-01-27 19:59:29,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=74, PETRI_TRANSITIONS=54} [2023-01-27 19:59:29,929 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2023-01-27 19:59:29,929 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 54 transitions, 343 flow [2023-01-27 19:59:29,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.6) internal successors, (883), 5 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:29,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:29,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:29,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:59:29,930 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:29,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:29,930 INFO L85 PathProgramCache]: Analyzing trace with hash -106514784, now seen corresponding path program 1 times [2023-01-27 19:59:29,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:29,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523157835] [2023-01-27 19:59:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:29,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:59:29,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:29,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523157835] [2023-01-27 19:59:29,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523157835] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:59:29,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:59:29,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 19:59:29,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289510024] [2023-01-27 19:59:29,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:59:29,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 19:59:29,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:59:29,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 19:59:30,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:59:30,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 483 [2023-01-27 19:59:30,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 54 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:30,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:59:30,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 483 [2023-01-27 19:59:30,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:59:30,109 INFO L130 PetriNetUnfolder]: 266/526 cut-off events. [2023-01-27 19:59:30,109 INFO L131 PetriNetUnfolder]: For 1644/1644 co-relation queries the response was YES. [2023-01-27 19:59:30,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 526 events. 266/526 cut-off events. For 1644/1644 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2212 event pairs, 158 based on Foata normal form. 24/549 useless extension candidates. Maximal degree in co-relation 1793. Up to 375 conditions per place. [2023-01-27 19:59:30,112 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 32 selfloop transitions, 4 changer transitions 22/58 dead transitions. [2023-01-27 19:59:30,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 430 flow [2023-01-27 19:59:30,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 19:59:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 19:59:30,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 907 transitions. [2023-01-27 19:59:30,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3755693581780538 [2023-01-27 19:59:30,114 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 907 transitions. [2023-01-27 19:59:30,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 907 transitions. [2023-01-27 19:59:30,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:59:30,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 907 transitions. [2023-01-27 19:59:30,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 181.4) internal successors, (907), 5 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:30,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 483.0) internal successors, (2898), 6 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:30,118 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 483.0) internal successors, (2898), 6 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:30,118 INFO L175 Difference]: Start difference. First operand has 74 places, 54 transitions, 343 flow. Second operand 5 states and 907 transitions. [2023-01-27 19:59:30,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 430 flow [2023-01-27 19:59:30,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 58 transitions, 392 flow, removed 8 selfloop flow, removed 9 redundant places. [2023-01-27 19:59:30,122 INFO L231 Difference]: Finished difference. Result has 60 places, 36 transitions, 176 flow [2023-01-27 19:59:30,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=60, PETRI_TRANSITIONS=36} [2023-01-27 19:59:30,123 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2023-01-27 19:59:30,123 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 36 transitions, 176 flow [2023-01-27 19:59:30,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:30,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:30,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:30,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 19:59:30,125 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:30,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:30,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1869828197, now seen corresponding path program 1 times [2023-01-27 19:59:30,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:30,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651636388] [2023-01-27 19:59:30,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:30,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:30,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:30,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651636388] [2023-01-27 19:59:30,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651636388] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:59:30,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308704157] [2023-01-27 19:59:30,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:30,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:30,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:59:30,533 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) [2023-01-27 19:59:30,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 19:59:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:30,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 19:59:30,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:59:30,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 19:59:30,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:59:30,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:59:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:30,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:59:38,110 WARN L222 SmtUtils]: Spent 6.95s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 19:59:38,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:38,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-01-27 19:59:38,225 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:38,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 598 treesize of output 546 [2023-01-27 19:59:38,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:38,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 255 [2023-01-27 19:59:38,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:38,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-01-27 19:59:38,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:38,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-01-27 19:59:38,456 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:38,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1206 treesize of output 1090 [2023-01-27 19:59:38,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:38,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 255 [2023-01-27 19:59:38,533 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:38,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-01-27 19:59:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:38,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308704157] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:59:38,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:59:38,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2023-01-27 19:59:38,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688686993] [2023-01-27 19:59:38,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:59:38,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 19:59:38,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:59:38,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 19:59:38,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=531, Unknown=31, NotChecked=0, Total=702 [2023-01-27 19:59:38,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 483 [2023-01-27 19:59:38,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 36 transitions, 176 flow. Second operand has 27 states, 27 states have (on average 138.55555555555554) internal successors, (3741), 27 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:38,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:59:38,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 483 [2023-01-27 19:59:38,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:59:39,732 INFO L130 PetriNetUnfolder]: 588/1042 cut-off events. [2023-01-27 19:59:39,732 INFO L131 PetriNetUnfolder]: For 3058/3058 co-relation queries the response was YES. [2023-01-27 19:59:39,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3664 conditions, 1042 events. 588/1042 cut-off events. For 3058/3058 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4968 event pairs, 76 based on Foata normal form. 32/1072 useless extension candidates. Maximal degree in co-relation 3626. Up to 313 conditions per place. [2023-01-27 19:59:39,737 INFO L137 encePairwiseOnDemand]: 469/483 looper letters, 77 selfloop transitions, 23 changer transitions 0/100 dead transitions. [2023-01-27 19:59:39,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 100 transitions, 672 flow [2023-01-27 19:59:39,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 19:59:39,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 19:59:39,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1869 transitions. [2023-01-27 19:59:39,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2976588628762542 [2023-01-27 19:59:39,741 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1869 transitions. [2023-01-27 19:59:39,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1869 transitions. [2023-01-27 19:59:39,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:59:39,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1869 transitions. [2023-01-27 19:59:39,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 143.76923076923077) internal successors, (1869), 13 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:39,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:39,750 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:39,750 INFO L175 Difference]: Start difference. First operand has 60 places, 36 transitions, 176 flow. Second operand 13 states and 1869 transitions. [2023-01-27 19:59:39,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 100 transitions, 672 flow [2023-01-27 19:59:39,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 100 transitions, 554 flow, removed 55 selfloop flow, removed 9 redundant places. [2023-01-27 19:59:39,757 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 281 flow [2023-01-27 19:59:39,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=281, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-01-27 19:59:39,757 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 33 predicate places. [2023-01-27 19:59:39,757 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 281 flow [2023-01-27 19:59:39,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 138.55555555555554) internal successors, (3741), 27 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:39,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:39,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:39,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-27 19:59:39,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:39,963 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:39,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:39,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1008614899, now seen corresponding path program 2 times [2023-01-27 19:59:39,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:39,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221876614] [2023-01-27 19:59:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:39,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:40,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:40,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221876614] [2023-01-27 19:59:40,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221876614] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:59:40,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221714663] [2023-01-27 19:59:40,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:59:40,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:40,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:59:40,313 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) [2023-01-27 19:59:40,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 19:59:40,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:59:40,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:59:40,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 19:59:40,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:59:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:40,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:59:40,715 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 19:59:40,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 91 [2023-01-27 19:59:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:40,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221714663] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 19:59:40,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 19:59:40,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 23 [2023-01-27 19:59:40,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311934767] [2023-01-27 19:59:40,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:59:40,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 19:59:40,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:59:40,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 19:59:40,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-01-27 19:59:40,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 483 [2023-01-27 19:59:40,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 281 flow. Second operand has 10 states, 10 states have (on average 150.9) internal successors, (1509), 10 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:40,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:59:40,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 483 [2023-01-27 19:59:40,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:59:41,221 INFO L130 PetriNetUnfolder]: 702/1236 cut-off events. [2023-01-27 19:59:41,221 INFO L131 PetriNetUnfolder]: For 2149/2149 co-relation queries the response was YES. [2023-01-27 19:59:41,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4479 conditions, 1236 events. 702/1236 cut-off events. For 2149/2149 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6064 event pairs, 198 based on Foata normal form. 4/1240 useless extension candidates. Maximal degree in co-relation 4439. Up to 652 conditions per place. [2023-01-27 19:59:41,227 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 72 selfloop transitions, 39 changer transitions 0/111 dead transitions. [2023-01-27 19:59:41,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 111 transitions, 833 flow [2023-01-27 19:59:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 19:59:41,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 19:59:41,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2019 transitions. [2023-01-27 19:59:41,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3215480172001911 [2023-01-27 19:59:41,231 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2019 transitions. [2023-01-27 19:59:41,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2019 transitions. [2023-01-27 19:59:41,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:59:41,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2019 transitions. [2023-01-27 19:59:41,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 155.30769230769232) internal successors, (2019), 13 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:41,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:41,240 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:41,240 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 281 flow. Second operand 13 states and 2019 transitions. [2023-01-27 19:59:41,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 111 transitions, 833 flow [2023-01-27 19:59:41,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 111 transitions, 799 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-01-27 19:59:41,245 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 556 flow [2023-01-27 19:59:41,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=556, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-01-27 19:59:41,245 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 46 predicate places. [2023-01-27 19:59:41,246 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 556 flow [2023-01-27 19:59:41,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 150.9) internal successors, (1509), 10 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:41,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:41,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:41,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 19:59:41,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:41,457 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:41,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:41,457 INFO L85 PathProgramCache]: Analyzing trace with hash -571449319, now seen corresponding path program 3 times [2023-01-27 19:59:41,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:41,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066030800] [2023-01-27 19:59:41,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:41,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:41,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:41,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066030800] [2023-01-27 19:59:41,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066030800] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:59:41,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340455396] [2023-01-27 19:59:41,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 19:59:41,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:41,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:59:41,910 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) [2023-01-27 19:59:41,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 19:59:41,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 19:59:41,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:59:41,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 19:59:41,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:59:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:42,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:59:42,384 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 19:59:42,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-01-27 19:59:42,399 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:59:42,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 4 [2023-01-27 19:59:42,404 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:59:42,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 4 [2023-01-27 19:59:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:42,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340455396] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:59:42,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:59:42,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-01-27 19:59:42,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903790578] [2023-01-27 19:59:42,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:59:42,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 19:59:42,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:59:42,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 19:59:42,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-01-27 19:59:42,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 483 [2023-01-27 19:59:42,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 556 flow. Second operand has 22 states, 22 states have (on average 146.72727272727272) internal successors, (3228), 22 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:42,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:59:42,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 483 [2023-01-27 19:59:42,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:59:43,064 INFO L130 PetriNetUnfolder]: 790/1412 cut-off events. [2023-01-27 19:59:43,064 INFO L131 PetriNetUnfolder]: For 5103/5103 co-relation queries the response was YES. [2023-01-27 19:59:43,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6307 conditions, 1412 events. 790/1412 cut-off events. For 5103/5103 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7256 event pairs, 272 based on Foata normal form. 32/1444 useless extension candidates. Maximal degree in co-relation 6260. Up to 759 conditions per place. [2023-01-27 19:59:43,071 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 84 selfloop transitions, 33 changer transitions 0/117 dead transitions. [2023-01-27 19:59:43,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 117 transitions, 1096 flow [2023-01-27 19:59:43,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 19:59:43,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 19:59:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1663 transitions. [2023-01-27 19:59:43,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3130058347449652 [2023-01-27 19:59:43,074 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1663 transitions. [2023-01-27 19:59:43,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1663 transitions. [2023-01-27 19:59:43,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:59:43,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1663 transitions. [2023-01-27 19:59:43,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 151.1818181818182) internal successors, (1663), 11 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:43,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:43,081 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:43,081 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 556 flow. Second operand 11 states and 1663 transitions. [2023-01-27 19:59:43,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 117 transitions, 1096 flow [2023-01-27 19:59:43,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 1006 flow, removed 40 selfloop flow, removed 4 redundant places. [2023-01-27 19:59:43,091 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 688 flow [2023-01-27 19:59:43,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=688, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2023-01-27 19:59:43,091 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 55 predicate places. [2023-01-27 19:59:43,091 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 688 flow [2023-01-27 19:59:43,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 146.72727272727272) internal successors, (3228), 22 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:43,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:43,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:43,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 19:59:43,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:43,297 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:43,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:43,298 INFO L85 PathProgramCache]: Analyzing trace with hash -20464861, now seen corresponding path program 4 times [2023-01-27 19:59:43,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:43,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42039214] [2023-01-27 19:59:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:43,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:43,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:43,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42039214] [2023-01-27 19:59:43,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42039214] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:59:43,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657888852] [2023-01-27 19:59:43,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 19:59:43,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:43,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:59:43,673 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) [2023-01-27 19:59:43,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 19:59:43,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 19:59:43,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:59:43,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 19:59:43,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:59:43,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 19:59:43,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:59:43,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:59:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:59:43,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:59:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:59:44,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657888852] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:59:44,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:59:44,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 6] total 22 [2023-01-27 19:59:44,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371431309] [2023-01-27 19:59:44,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:59:44,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 19:59:44,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:59:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 19:59:44,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-01-27 19:59:44,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 483 [2023-01-27 19:59:44,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 688 flow. Second operand has 22 states, 22 states have (on average 139.04545454545453) internal successors, (3059), 22 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:44,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:59:44,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 483 [2023-01-27 19:59:44,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:59:45,245 INFO L130 PetriNetUnfolder]: 948/1710 cut-off events. [2023-01-27 19:59:45,246 INFO L131 PetriNetUnfolder]: For 7364/7364 co-relation queries the response was YES. [2023-01-27 19:59:45,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7957 conditions, 1710 events. 948/1710 cut-off events. For 7364/7364 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9299 event pairs, 230 based on Foata normal form. 32/1742 useless extension candidates. Maximal degree in co-relation 7906. Up to 894 conditions per place. [2023-01-27 19:59:45,255 INFO L137 encePairwiseOnDemand]: 469/483 looper letters, 86 selfloop transitions, 61 changer transitions 0/147 dead transitions. [2023-01-27 19:59:45,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 147 transitions, 1409 flow [2023-01-27 19:59:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 19:59:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 19:59:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1870 transitions. [2023-01-27 19:59:45,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29781812390508045 [2023-01-27 19:59:45,261 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1870 transitions. [2023-01-27 19:59:45,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1870 transitions. [2023-01-27 19:59:45,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:59:45,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1870 transitions. [2023-01-27 19:59:45,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 143.84615384615384) internal successors, (1870), 13 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:45,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:45,270 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:45,270 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 688 flow. Second operand 13 states and 1870 transitions. [2023-01-27 19:59:45,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 147 transitions, 1409 flow [2023-01-27 19:59:45,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 147 transitions, 1329 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-01-27 19:59:45,284 INFO L231 Difference]: Finished difference. Result has 90 places, 108 transitions, 1106 flow [2023-01-27 19:59:45,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1106, PETRI_PLACES=90, PETRI_TRANSITIONS=108} [2023-01-27 19:59:45,285 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 65 predicate places. [2023-01-27 19:59:45,285 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 108 transitions, 1106 flow [2023-01-27 19:59:45,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 139.04545454545453) internal successors, (3059), 22 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:45,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:45,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:45,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 19:59:45,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:45,493 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:45,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:45,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1451051645, now seen corresponding path program 5 times [2023-01-27 19:59:45,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:45,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805676507] [2023-01-27 19:59:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:45,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:45,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:45,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805676507] [2023-01-27 19:59:45,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805676507] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:59:45,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747547242] [2023-01-27 19:59:45,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 19:59:45,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:45,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:59:45,929 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) [2023-01-27 19:59:45,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 19:59:46,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:59:46,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:59:46,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 19:59:46,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:59:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:59:46,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:59:46,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747547242] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:59:46,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:59:46,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2023-01-27 19:59:46,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15357283] [2023-01-27 19:59:46,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:59:46,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:59:46,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:59:46,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:59:46,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-01-27 19:59:46,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 483 [2023-01-27 19:59:46,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 108 transitions, 1106 flow. Second operand has 6 states, 6 states have (on average 172.16666666666666) internal successors, (1033), 6 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:46,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:59:46,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 483 [2023-01-27 19:59:46,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:59:46,357 INFO L130 PetriNetUnfolder]: 932/1654 cut-off events. [2023-01-27 19:59:46,357 INFO L131 PetriNetUnfolder]: For 9795/9795 co-relation queries the response was YES. [2023-01-27 19:59:46,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8750 conditions, 1654 events. 932/1654 cut-off events. For 9795/9795 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8865 event pairs, 310 based on Foata normal form. 4/1658 useless extension candidates. Maximal degree in co-relation 8693. Up to 1017 conditions per place. [2023-01-27 19:59:46,368 INFO L137 encePairwiseOnDemand]: 475/483 looper letters, 100 selfloop transitions, 30 changer transitions 0/130 dead transitions. [2023-01-27 19:59:46,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 130 transitions, 1487 flow [2023-01-27 19:59:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:59:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:59:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1071 transitions. [2023-01-27 19:59:46,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2023-01-27 19:59:46,370 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1071 transitions. [2023-01-27 19:59:46,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1071 transitions. [2023-01-27 19:59:46,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:59:46,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1071 transitions. [2023-01-27 19:59:46,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 178.5) internal successors, (1071), 6 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:46,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:46,374 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:46,374 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 1106 flow. Second operand 6 states and 1071 transitions. [2023-01-27 19:59:46,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 130 transitions, 1487 flow [2023-01-27 19:59:46,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 1441 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-01-27 19:59:46,397 INFO L231 Difference]: Finished difference. Result has 92 places, 109 transitions, 1130 flow [2023-01-27 19:59:46,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1130, PETRI_PLACES=92, PETRI_TRANSITIONS=109} [2023-01-27 19:59:46,398 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 67 predicate places. [2023-01-27 19:59:46,398 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 109 transitions, 1130 flow [2023-01-27 19:59:46,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 172.16666666666666) internal successors, (1033), 6 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:46,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:46,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:46,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-27 19:59:46,603 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,SelfDestructingSolverStorable11 [2023-01-27 19:59:46,603 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:46,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:46,603 INFO L85 PathProgramCache]: Analyzing trace with hash -900067187, now seen corresponding path program 6 times [2023-01-27 19:59:46,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:46,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866833389] [2023-01-27 19:59:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:46,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:47,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:47,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866833389] [2023-01-27 19:59:47,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866833389] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:59:47,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512739050] [2023-01-27 19:59:47,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 19:59:47,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:47,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:59:47,071 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) [2023-01-27 19:59:47,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 19:59:47,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 19:59:47,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:59:47,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 19:59:47,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:59:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:47,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:59:47,537 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:59:47,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:59:47,572 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 19:59:47,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 66 [2023-01-27 19:59:47,594 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:59:47,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:59:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:47,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512739050] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 19:59:47,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 19:59:47,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2023-01-27 19:59:47,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861893309] [2023-01-27 19:59:47,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:59:47,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 19:59:47,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:59:47,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 19:59:47,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-01-27 19:59:47,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 483 [2023-01-27 19:59:47,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 109 transitions, 1130 flow. Second operand has 10 states, 10 states have (on average 150.9) internal successors, (1509), 10 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:47,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:59:47,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 483 [2023-01-27 19:59:47,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:59:48,149 INFO L130 PetriNetUnfolder]: 916/1598 cut-off events. [2023-01-27 19:59:48,149 INFO L131 PetriNetUnfolder]: For 9260/9260 co-relation queries the response was YES. [2023-01-27 19:59:48,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8585 conditions, 1598 events. 916/1598 cut-off events. For 9260/9260 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8387 event pairs, 216 based on Foata normal form. 4/1602 useless extension candidates. Maximal degree in co-relation 8530. Up to 812 conditions per place. [2023-01-27 19:59:48,158 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 80 selfloop transitions, 62 changer transitions 0/142 dead transitions. [2023-01-27 19:59:48,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 142 transitions, 1599 flow [2023-01-27 19:59:48,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 19:59:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 19:59:48,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2018 transitions. [2023-01-27 19:59:48,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32138875617136486 [2023-01-27 19:59:48,160 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2018 transitions. [2023-01-27 19:59:48,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2018 transitions. [2023-01-27 19:59:48,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:59:48,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2018 transitions. [2023-01-27 19:59:48,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 155.23076923076923) internal successors, (2018), 13 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:48,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:48,166 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:48,166 INFO L175 Difference]: Start difference. First operand has 92 places, 109 transitions, 1130 flow. Second operand 13 states and 2018 transitions. [2023-01-27 19:59:48,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 142 transitions, 1599 flow [2023-01-27 19:59:48,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 142 transitions, 1541 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-01-27 19:59:48,187 INFO L231 Difference]: Finished difference. Result has 101 places, 109 transitions, 1198 flow [2023-01-27 19:59:48,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1198, PETRI_PLACES=101, PETRI_TRANSITIONS=109} [2023-01-27 19:59:48,187 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 76 predicate places. [2023-01-27 19:59:48,187 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 109 transitions, 1198 flow [2023-01-27 19:59:48,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 150.9) internal successors, (1509), 10 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:48,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:48,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:48,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 19:59:48,392 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,SelfDestructingSolverStorable12 [2023-01-27 19:59:48,392 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:48,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:48,392 INFO L85 PathProgramCache]: Analyzing trace with hash -525642385, now seen corresponding path program 7 times [2023-01-27 19:59:48,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:48,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025820142] [2023-01-27 19:59:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:48,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:48,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:48,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025820142] [2023-01-27 19:59:48,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025820142] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:59:48,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546345365] [2023-01-27 19:59:48,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 19:59:48,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:48,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:59:48,757 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) [2023-01-27 19:59:48,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 19:59:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:48,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 19:59:48,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:59:48,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 19:59:48,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:59:48,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:59:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:49,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:59:49,508 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:49,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-01-27 19:59:49,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:49,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 598 treesize of output 546 [2023-01-27 19:59:49,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:49,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 255 [2023-01-27 19:59:49,546 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:49,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-01-27 19:59:49,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:49,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-01-27 19:59:49,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:49,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1206 treesize of output 1090 [2023-01-27 19:59:49,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:49,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 239 [2023-01-27 19:59:49,762 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:49,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 223 [2023-01-27 19:59:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:49,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546345365] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:59:49,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:59:49,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2023-01-27 19:59:49,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226740080] [2023-01-27 19:59:49,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:59:49,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 19:59:49,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:59:49,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 19:59:49,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=684, Unknown=10, NotChecked=0, Total=812 [2023-01-27 19:59:49,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 483 [2023-01-27 19:59:49,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 1198 flow. Second operand has 29 states, 29 states have (on average 138.51724137931035) internal successors, (4017), 29 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:49,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:59:49,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 483 [2023-01-27 19:59:49,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:59:50,826 INFO L130 PetriNetUnfolder]: 1202/2132 cut-off events. [2023-01-27 19:59:50,826 INFO L131 PetriNetUnfolder]: For 13561/13561 co-relation queries the response was YES. [2023-01-27 19:59:50,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11780 conditions, 2132 events. 1202/2132 cut-off events. For 13561/13561 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12156 event pairs, 228 based on Foata normal form. 4/2136 useless extension candidates. Maximal degree in co-relation 11720. Up to 927 conditions per place. [2023-01-27 19:59:50,840 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 79 selfloop transitions, 103 changer transitions 0/182 dead transitions. [2023-01-27 19:59:50,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 182 transitions, 2240 flow [2023-01-27 19:59:50,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 19:59:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 19:59:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1988 transitions. [2023-01-27 19:59:50,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2939958592132505 [2023-01-27 19:59:50,844 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1988 transitions. [2023-01-27 19:59:50,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1988 transitions. [2023-01-27 19:59:50,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:59:50,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1988 transitions. [2023-01-27 19:59:50,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 142.0) internal successors, (1988), 14 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:50,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:50,850 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:50,850 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 1198 flow. Second operand 14 states and 1988 transitions. [2023-01-27 19:59:50,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 182 transitions, 2240 flow [2023-01-27 19:59:50,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 182 transitions, 2115 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-01-27 19:59:50,885 INFO L231 Difference]: Finished difference. Result has 110 places, 144 transitions, 1863 flow [2023-01-27 19:59:50,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1863, PETRI_PLACES=110, PETRI_TRANSITIONS=144} [2023-01-27 19:59:50,886 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 85 predicate places. [2023-01-27 19:59:50,886 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 144 transitions, 1863 flow [2023-01-27 19:59:50,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 138.51724137931035) internal successors, (4017), 29 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:50,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:50,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:50,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-01-27 19:59:51,091 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,SelfDestructingSolverStorable13 [2023-01-27 19:59:51,091 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:51,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:51,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1427234071, now seen corresponding path program 8 times [2023-01-27 19:59:51,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:51,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143998105] [2023-01-27 19:59:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:51,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:51,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:51,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143998105] [2023-01-27 19:59:51,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143998105] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:59:51,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223428238] [2023-01-27 19:59:51,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:59:51,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:51,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:59:51,501 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) [2023-01-27 19:59:51,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 19:59:51,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:59:51,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:59:51,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 19:59:51,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:59:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:51,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:59:51,870 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:59:51,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:59:51,906 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 19:59:51,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 66 [2023-01-27 19:59:51,925 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:59:51,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:59:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:52,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223428238] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:59:52,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:59:52,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-01-27 19:59:52,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921711425] [2023-01-27 19:59:52,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:59:52,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 19:59:52,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:59:52,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 19:59:52,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2023-01-27 19:59:52,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 483 [2023-01-27 19:59:52,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 144 transitions, 1863 flow. Second operand has 22 states, 22 states have (on average 146.8181818181818) internal successors, (3230), 22 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:52,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:59:52,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 483 [2023-01-27 19:59:52,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:59:52,629 INFO L130 PetriNetUnfolder]: 1170/2100 cut-off events. [2023-01-27 19:59:52,629 INFO L131 PetriNetUnfolder]: For 17969/17969 co-relation queries the response was YES. [2023-01-27 19:59:52,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13038 conditions, 2100 events. 1170/2100 cut-off events. For 17969/17969 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11860 event pairs, 292 based on Foata normal form. 32/2132 useless extension candidates. Maximal degree in co-relation 12973. Up to 1203 conditions per place. [2023-01-27 19:59:52,640 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 128 selfloop transitions, 55 changer transitions 0/183 dead transitions. [2023-01-27 19:59:52,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 183 transitions, 2513 flow [2023-01-27 19:59:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 19:59:52,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 19:59:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1662 transitions. [2023-01-27 19:59:52,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31281761716544326 [2023-01-27 19:59:52,642 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1662 transitions. [2023-01-27 19:59:52,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1662 transitions. [2023-01-27 19:59:52,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:59:52,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1662 transitions. [2023-01-27 19:59:52,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 151.0909090909091) internal successors, (1662), 11 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:52,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:52,646 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:52,646 INFO L175 Difference]: Start difference. First operand has 110 places, 144 transitions, 1863 flow. Second operand 11 states and 1662 transitions. [2023-01-27 19:59:52,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 183 transitions, 2513 flow [2023-01-27 19:59:52,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 183 transitions, 2392 flow, removed 27 selfloop flow, removed 6 redundant places. [2023-01-27 19:59:52,698 INFO L231 Difference]: Finished difference. Result has 118 places, 150 transitions, 2021 flow [2023-01-27 19:59:52,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2021, PETRI_PLACES=118, PETRI_TRANSITIONS=150} [2023-01-27 19:59:52,699 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 93 predicate places. [2023-01-27 19:59:52,699 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 150 transitions, 2021 flow [2023-01-27 19:59:52,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 146.8181818181818) internal successors, (3230), 22 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:52,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:52,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:52,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-27 19:59:52,904 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,SelfDestructingSolverStorable14 [2023-01-27 19:59:52,904 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:52,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:52,904 INFO L85 PathProgramCache]: Analyzing trace with hash -134892999, now seen corresponding path program 9 times [2023-01-27 19:59:52,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:52,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680173612] [2023-01-27 19:59:52,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:52,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:53,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:53,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680173612] [2023-01-27 19:59:53,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680173612] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:59:53,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959635044] [2023-01-27 19:59:53,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 19:59:53,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:53,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:59:53,452 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) [2023-01-27 19:59:53,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 19:59:53,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 19:59:53,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:59:53,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 19:59:53,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:59:53,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 19:59:53,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:59:53,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:59:53,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:59:53,896 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 19:59:53,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-01-27 19:59:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:53,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:59:54,476 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:54,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 31 [2023-01-27 19:59:54,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:54,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2023-01-27 19:59:54,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:54,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-01-27 19:59:54,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:54,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 31 [2023-01-27 19:59:54,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:54,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2023-01-27 19:59:54,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:54,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-01-27 19:59:54,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:54,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 104 [2023-01-27 19:59:54,555 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:59:54,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3750 treesize of output 3350 [2023-01-27 19:59:54,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:54,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 854 treesize of output 806 [2023-01-27 19:59:54,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:54,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 752 treesize of output 664 [2023-01-27 19:59:55,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:55,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959635044] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:59:55,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:59:55,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2023-01-27 19:59:55,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270164533] [2023-01-27 19:59:55,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:59:55,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 19:59:55,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:59:55,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 19:59:55,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=799, Unknown=9, NotChecked=0, Total=930 [2023-01-27 19:59:55,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 483 [2023-01-27 19:59:55,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 150 transitions, 2021 flow. Second operand has 31 states, 31 states have (on average 138.6451612903226) internal successors, (4298), 31 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:55,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:59:55,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 483 [2023-01-27 19:59:55,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:59:56,335 INFO L130 PetriNetUnfolder]: 1202/2156 cut-off events. [2023-01-27 19:59:56,335 INFO L131 PetriNetUnfolder]: For 20029/20029 co-relation queries the response was YES. [2023-01-27 19:59:56,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13749 conditions, 2156 events. 1202/2156 cut-off events. For 20029/20029 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12246 event pairs, 190 based on Foata normal form. 40/2196 useless extension candidates. Maximal degree in co-relation 13680. Up to 1132 conditions per place. [2023-01-27 19:59:56,348 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 135 selfloop transitions, 57 changer transitions 0/192 dead transitions. [2023-01-27 19:59:56,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 192 transitions, 2825 flow [2023-01-27 19:59:56,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 19:59:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 19:59:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1570 transitions. [2023-01-27 19:59:56,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2955015998494259 [2023-01-27 19:59:56,350 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1570 transitions. [2023-01-27 19:59:56,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1570 transitions. [2023-01-27 19:59:56,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:59:56,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1570 transitions. [2023-01-27 19:59:56,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 142.72727272727272) internal successors, (1570), 11 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:56,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:56,354 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:56,355 INFO L175 Difference]: Start difference. First operand has 118 places, 150 transitions, 2021 flow. Second operand 11 states and 1570 transitions. [2023-01-27 19:59:56,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 192 transitions, 2825 flow [2023-01-27 19:59:56,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 192 transitions, 2736 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-01-27 19:59:56,408 INFO L231 Difference]: Finished difference. Result has 124 places, 153 transitions, 2146 flow [2023-01-27 19:59:56,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2146, PETRI_PLACES=124, PETRI_TRANSITIONS=153} [2023-01-27 19:59:56,409 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 99 predicate places. [2023-01-27 19:59:56,409 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 153 transitions, 2146 flow [2023-01-27 19:59:56,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 138.6451612903226) internal successors, (4298), 31 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:59:56,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:59:56,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:59:56,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 19:59:56,614 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,SelfDestructingSolverStorable15 [2023-01-27 19:59:56,614 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:59:56,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:59:56,615 INFO L85 PathProgramCache]: Analyzing trace with hash -71803201, now seen corresponding path program 10 times [2023-01-27 19:59:56,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:59:56,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689739269] [2023-01-27 19:59:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:59:56,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:59:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:59:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:59:57,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:59:57,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689739269] [2023-01-27 19:59:57,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689739269] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:59:57,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107887956] [2023-01-27 19:59:57,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 19:59:57,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:59:57,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:59:57,024 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:59:57,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 19:59:57,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 19:59:57,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:59:57,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-27 19:59:57,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:59:57,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 19:59:57,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:59:57,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:59:57,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 19:59:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:59:57,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:59:59,858 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:59,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 107 [2023-01-27 19:59:59,872 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:59:59,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2126 treesize of output 1886 [2023-01-27 19:59:59,905 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:59,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 922 treesize of output 826 [2023-01-27 19:59:59,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:59:59,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 818 treesize of output 766 [2023-01-27 20:00:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:00:00,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107887956] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:00:00,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:00:00,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-01-27 20:00:00,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795606717] [2023-01-27 20:00:00,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:00:00,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 20:00:00,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:00:00,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 20:00:00,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=665, Unknown=13, NotChecked=0, Total=812 [2023-01-27 20:00:00,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 483 [2023-01-27 20:00:00,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 153 transitions, 2146 flow. Second operand has 29 states, 29 states have (on average 138.6206896551724) internal successors, (4020), 29 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:00,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:00:00,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 483 [2023-01-27 20:00:00,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:00:02,653 INFO L130 PetriNetUnfolder]: 2136/3876 cut-off events. [2023-01-27 20:00:02,653 INFO L131 PetriNetUnfolder]: For 36806/36806 co-relation queries the response was YES. [2023-01-27 20:00:02,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23507 conditions, 3876 events. 2136/3876 cut-off events. For 36806/36806 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 24984 event pairs, 432 based on Foata normal form. 24/3900 useless extension candidates. Maximal degree in co-relation 23436. Up to 1152 conditions per place. [2023-01-27 20:00:02,677 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 183 selfloop transitions, 122 changer transitions 0/305 dead transitions. [2023-01-27 20:00:02,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 305 transitions, 4306 flow [2023-01-27 20:00:02,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 20:00:02,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 20:00:02,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2739 transitions. [2023-01-27 20:00:02,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2984635501797973 [2023-01-27 20:00:02,691 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2739 transitions. [2023-01-27 20:00:02,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2739 transitions. [2023-01-27 20:00:02,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:00:02,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2739 transitions. [2023-01-27 20:00:02,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 144.1578947368421) internal successors, (2739), 19 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:02,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:02,698 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:02,698 INFO L175 Difference]: Start difference. First operand has 124 places, 153 transitions, 2146 flow. Second operand 19 states and 2739 transitions. [2023-01-27 20:00:02,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 305 transitions, 4306 flow [2023-01-27 20:00:02,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 305 transitions, 4137 flow, removed 47 selfloop flow, removed 8 redundant places. [2023-01-27 20:00:02,816 INFO L231 Difference]: Finished difference. Result has 141 places, 190 transitions, 2848 flow [2023-01-27 20:00:02,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2848, PETRI_PLACES=141, PETRI_TRANSITIONS=190} [2023-01-27 20:00:02,817 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 116 predicate places. [2023-01-27 20:00:02,817 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 190 transitions, 2848 flow [2023-01-27 20:00:02,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 138.6206896551724) internal successors, (4020), 29 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:02,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:00:02,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:00:02,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-27 20:00:03,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-27 20:00:03,023 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:00:03,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:00:03,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1227810281, now seen corresponding path program 11 times [2023-01-27 20:00:03,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:00:03,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50856115] [2023-01-27 20:00:03,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:00:03,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:00:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:00:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:00:03,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:00:03,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50856115] [2023-01-27 20:00:03,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50856115] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:00:03,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135372654] [2023-01-27 20:00:03,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:00:03,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:00:03,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:00:03,538 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:00:03,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 20:00:03,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:00:03,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:00:03,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-27 20:00:03,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:00:03,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:00:03,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 20:00:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:00:03,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:00:04,056 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse5 (forall ((~a2~0.offset Int) (v_ArrVal_607 (Array Int Int)) (~a2~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_607) ~a2~0.base) (+ ~a2~0.offset .cse3)) |c_thread1Thread1of1ForFork0_#t~mem1#1|))))) (and (forall ((~a2~0.offset Int) (v_ArrVal_607 (Array Int Int)) (~a2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_607))) (let ((.cse2 (select .cse4 ~a2~0.base))) (let ((.cse1 (select .cse2 ~a2~0.offset)) (.cse0 (select (select .cse4 c_~a1~0.base) c_~a1~0.offset))) (or (< (+ 2147483647 .cse0) .cse1) (= .cse0 .cse1) (not (= (select .cse2 (+ ~a2~0.offset .cse3)) |c_thread1Thread1of1ForFork0_#t~mem1#1|)) (< (+ .cse1 2147483648) .cse0)))))) (or (< 0 c_~n1~0) .cse5) (or (< 0 c_~n2~0) .cse5)))) is different from false [2023-01-27 20:00:04,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:04,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 365 treesize of output 429 [2023-01-27 20:00:04,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:04,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 245 treesize of output 244 [2023-01-27 20:00:04,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 209 [2023-01-27 20:00:04,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 203 [2023-01-27 20:00:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:00:07,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135372654] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:00:07,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:00:07,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2023-01-27 20:00:07,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669801548] [2023-01-27 20:00:07,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:00:07,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 20:00:07,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:00:07,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 20:00:07,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=515, Unknown=1, NotChecked=46, Total=650 [2023-01-27 20:00:07,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 483 [2023-01-27 20:00:07,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 190 transitions, 2848 flow. Second operand has 26 states, 26 states have (on average 143.03846153846155) internal successors, (3719), 26 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:07,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:00:07,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 483 [2023-01-27 20:00:07,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:00:08,221 INFO L130 PetriNetUnfolder]: 2032/3676 cut-off events. [2023-01-27 20:00:08,221 INFO L131 PetriNetUnfolder]: For 41979/41979 co-relation queries the response was YES. [2023-01-27 20:00:08,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23868 conditions, 3676 events. 2032/3676 cut-off events. For 41979/41979 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 23463 event pairs, 694 based on Foata normal form. 76/3752 useless extension candidates. Maximal degree in co-relation 23791. Up to 2697 conditions per place. [2023-01-27 20:00:08,263 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 162 selfloop transitions, 59 changer transitions 0/221 dead transitions. [2023-01-27 20:00:08,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 221 transitions, 3556 flow [2023-01-27 20:00:08,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:00:08,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:00:08,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1614 transitions. [2023-01-27 20:00:08,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3037831733483907 [2023-01-27 20:00:08,265 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1614 transitions. [2023-01-27 20:00:08,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1614 transitions. [2023-01-27 20:00:08,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:00:08,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1614 transitions. [2023-01-27 20:00:08,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 146.72727272727272) internal successors, (1614), 11 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:08,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:08,269 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:08,269 INFO L175 Difference]: Start difference. First operand has 141 places, 190 transitions, 2848 flow. Second operand 11 states and 1614 transitions. [2023-01-27 20:00:08,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 221 transitions, 3556 flow [2023-01-27 20:00:08,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 221 transitions, 3314 flow, removed 44 selfloop flow, removed 8 redundant places. [2023-01-27 20:00:08,365 INFO L231 Difference]: Finished difference. Result has 144 places, 185 transitions, 2678 flow [2023-01-27 20:00:08,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=2527, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2678, PETRI_PLACES=144, PETRI_TRANSITIONS=185} [2023-01-27 20:00:08,365 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 119 predicate places. [2023-01-27 20:00:08,365 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 185 transitions, 2678 flow [2023-01-27 20:00:08,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 143.03846153846155) internal successors, (3719), 26 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:08,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:00:08,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:00:08,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 20:00:08,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:00:08,570 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:00:08,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:00:08,570 INFO L85 PathProgramCache]: Analyzing trace with hash 806001645, now seen corresponding path program 12 times [2023-01-27 20:00:08,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:00:08,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891739801] [2023-01-27 20:00:08,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:00:08,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:00:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:00:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:00:08,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:00:08,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891739801] [2023-01-27 20:00:08,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891739801] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:00:08,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635082710] [2023-01-27 20:00:08,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:00:08,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:00:08,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:00:08,869 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:00:08,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 20:00:09,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 20:00:09,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:00:09,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 20:00:09,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:00:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:00:09,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:00:09,691 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 20:00:09,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 206 treesize of output 223 [2023-01-27 20:00:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:00:09,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635082710] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:00:09,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:00:09,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 9] total 26 [2023-01-27 20:00:09,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181557021] [2023-01-27 20:00:09,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:00:09,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:00:09,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:00:09,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:00:09,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2023-01-27 20:00:09,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 483 [2023-01-27 20:00:09,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 185 transitions, 2678 flow. Second operand has 9 states, 9 states have (on average 144.11111111111111) internal successors, (1297), 9 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:09,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:00:09,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 483 [2023-01-27 20:00:09,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:00:10,878 INFO L130 PetriNetUnfolder]: 2130/3900 cut-off events. [2023-01-27 20:00:10,879 INFO L131 PetriNetUnfolder]: For 39081/39081 co-relation queries the response was YES. [2023-01-27 20:00:10,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24739 conditions, 3900 events. 2130/3900 cut-off events. For 39081/39081 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25434 event pairs, 446 based on Foata normal form. 6/3906 useless extension candidates. Maximal degree in co-relation 24662. Up to 2077 conditions per place. [2023-01-27 20:00:10,905 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 123 selfloop transitions, 127 changer transitions 4/254 dead transitions. [2023-01-27 20:00:10,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 254 transitions, 3891 flow [2023-01-27 20:00:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 20:00:10,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 20:00:10,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1785 transitions. [2023-01-27 20:00:10,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3079710144927536 [2023-01-27 20:00:10,926 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1785 transitions. [2023-01-27 20:00:10,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1785 transitions. [2023-01-27 20:00:10,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:00:10,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1785 transitions. [2023-01-27 20:00:10,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 148.75) internal successors, (1785), 12 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:10,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:10,931 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:10,931 INFO L175 Difference]: Start difference. First operand has 144 places, 185 transitions, 2678 flow. Second operand 12 states and 1785 transitions. [2023-01-27 20:00:10,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 254 transitions, 3891 flow [2023-01-27 20:00:11,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 254 transitions, 3741 flow, removed 9 selfloop flow, removed 9 redundant places. [2023-01-27 20:00:11,080 INFO L231 Difference]: Finished difference. Result has 153 places, 225 transitions, 3596 flow [2023-01-27 20:00:11,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=2550, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3596, PETRI_PLACES=153, PETRI_TRANSITIONS=225} [2023-01-27 20:00:11,081 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 128 predicate places. [2023-01-27 20:00:11,081 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 225 transitions, 3596 flow [2023-01-27 20:00:11,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 144.11111111111111) internal successors, (1297), 9 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:11,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:00:11,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:00:11,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-27 20:00:11,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:00:11,290 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:00:11,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:00:11,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1568119743, now seen corresponding path program 13 times [2023-01-27 20:00:11,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:00:11,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090837162] [2023-01-27 20:00:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:00:11,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:00:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:00:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:00:11,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:00:11,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090837162] [2023-01-27 20:00:11,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090837162] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:00:11,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856067373] [2023-01-27 20:00:11,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:00:11,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:00:11,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:00:11,630 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:00:11,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 20:00:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:00:11,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 20:00:11,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:00:11,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 20:00:11,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:00:11,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:00:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:00:11,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:00:12,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:12,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-01-27 20:00:12,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:12,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 274 [2023-01-27 20:00:12,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:12,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 239 [2023-01-27 20:00:12,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:12,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 223 [2023-01-27 20:00:12,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:12,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-01-27 20:00:12,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:12,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1206 treesize of output 1090 [2023-01-27 20:00:12,474 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:12,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 239 [2023-01-27 20:00:12,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:12,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 223 [2023-01-27 20:00:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:00:12,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856067373] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:00:12,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:00:12,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2023-01-27 20:00:12,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932534269] [2023-01-27 20:00:12,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:00:12,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 20:00:12,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:00:12,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 20:00:12,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=560, Unknown=14, NotChecked=0, Total=702 [2023-01-27 20:00:12,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 483 [2023-01-27 20:00:12,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 225 transitions, 3596 flow. Second operand has 27 states, 27 states have (on average 138.55555555555554) internal successors, (3741), 27 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:12,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:00:12,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 483 [2023-01-27 20:00:12,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:00:13,880 INFO L130 PetriNetUnfolder]: 2092/3794 cut-off events. [2023-01-27 20:00:13,880 INFO L131 PetriNetUnfolder]: For 45543/45543 co-relation queries the response was YES. [2023-01-27 20:00:13,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26519 conditions, 3794 events. 2092/3794 cut-off events. For 45543/45543 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 24530 event pairs, 410 based on Foata normal form. 8/3802 useless extension candidates. Maximal degree in co-relation 26437. Up to 1889 conditions per place. [2023-01-27 20:00:13,906 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 97 selfloop transitions, 156 changer transitions 1/254 dead transitions. [2023-01-27 20:00:13,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 254 transitions, 4231 flow [2023-01-27 20:00:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:00:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:00:13,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2132 transitions. [2023-01-27 20:00:13,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29427191166321603 [2023-01-27 20:00:13,910 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2132 transitions. [2023-01-27 20:00:13,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2132 transitions. [2023-01-27 20:00:13,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:00:13,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2132 transitions. [2023-01-27 20:00:13,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 142.13333333333333) internal successors, (2132), 15 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:13,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 483.0) internal successors, (7728), 16 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:13,917 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 483.0) internal successors, (7728), 16 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:13,917 INFO L175 Difference]: Start difference. First operand has 153 places, 225 transitions, 3596 flow. Second operand 15 states and 2132 transitions. [2023-01-27 20:00:13,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 254 transitions, 4231 flow [2023-01-27 20:00:14,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 254 transitions, 4122 flow, removed 53 selfloop flow, removed 2 redundant places. [2023-01-27 20:00:14,087 INFO L231 Difference]: Finished difference. Result has 167 places, 223 transitions, 3770 flow [2023-01-27 20:00:14,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=3389, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3770, PETRI_PLACES=167, PETRI_TRANSITIONS=223} [2023-01-27 20:00:14,087 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 142 predicate places. [2023-01-27 20:00:14,087 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 223 transitions, 3770 flow [2023-01-27 20:00:14,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 138.55555555555554) internal successors, (3741), 27 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:14,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:00:14,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:00:14,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-27 20:00:14,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:00:14,293 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:00:14,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:00:14,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1588118134, now seen corresponding path program 1 times [2023-01-27 20:00:14,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:00:14,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635644375] [2023-01-27 20:00:14,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:00:14,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:00:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:00:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:00:14,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:00:14,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635644375] [2023-01-27 20:00:14,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635644375] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:00:14,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948352357] [2023-01-27 20:00:14,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:00:14,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:00:14,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:00:14,941 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:00:14,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 20:00:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:00:15,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-27 20:00:15,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:00:15,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 20:00:15,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:00:15,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:00:15,440 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:00:15,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:00:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:00:15,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:00:22,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:22,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-01-27 20:00:22,382 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:00:22,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 253 [2023-01-27 20:00:22,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:22,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 222 [2023-01-27 20:00:22,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:22,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 206 [2023-01-27 20:00:22,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:22,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-01-27 20:00:22,768 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:00:22,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 566 treesize of output 509 [2023-01-27 20:00:22,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:22,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-01-27 20:00:22,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:22,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-01-27 20:00:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:00:23,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948352357] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:00:23,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:00:23,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 35 [2023-01-27 20:00:23,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314543603] [2023-01-27 20:00:23,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:00:23,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-27 20:00:23,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:00:23,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-27 20:00:23,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1076, Unknown=15, NotChecked=0, Total=1332 [2023-01-27 20:00:23,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 483 [2023-01-27 20:00:23,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 223 transitions, 3770 flow. Second operand has 37 states, 37 states have (on average 129.56756756756758) internal successors, (4794), 37 states have internal predecessors, (4794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:23,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:00:23,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 483 [2023-01-27 20:00:23,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:00:25,583 INFO L130 PetriNetUnfolder]: 2252/4152 cut-off events. [2023-01-27 20:00:25,583 INFO L131 PetriNetUnfolder]: For 53684/53684 co-relation queries the response was YES. [2023-01-27 20:00:25,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29631 conditions, 4152 events. 2252/4152 cut-off events. For 53684/53684 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 27813 event pairs, 388 based on Foata normal form. 10/4162 useless extension candidates. Maximal degree in co-relation 29544. Up to 1461 conditions per place. [2023-01-27 20:00:25,609 INFO L137 encePairwiseOnDemand]: 467/483 looper letters, 279 selfloop transitions, 125 changer transitions 11/415 dead transitions. [2023-01-27 20:00:25,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 415 transitions, 6489 flow [2023-01-27 20:00:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 20:00:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 20:00:25,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3247 transitions. [2023-01-27 20:00:25,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2801069703243616 [2023-01-27 20:00:25,613 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3247 transitions. [2023-01-27 20:00:25,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3247 transitions. [2023-01-27 20:00:25,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:00:25,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3247 transitions. [2023-01-27 20:00:25,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 135.29166666666666) internal successors, (3247), 24 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:25,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 483.0) internal successors, (12075), 25 states have internal predecessors, (12075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:25,623 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 483.0) internal successors, (12075), 25 states have internal predecessors, (12075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:25,623 INFO L175 Difference]: Start difference. First operand has 167 places, 223 transitions, 3770 flow. Second operand 24 states and 3247 transitions. [2023-01-27 20:00:25,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 415 transitions, 6489 flow [2023-01-27 20:00:25,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 415 transitions, 6381 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-01-27 20:00:25,796 INFO L231 Difference]: Finished difference. Result has 189 places, 271 transitions, 4561 flow [2023-01-27 20:00:25,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=3670, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4561, PETRI_PLACES=189, PETRI_TRANSITIONS=271} [2023-01-27 20:00:25,797 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 164 predicate places. [2023-01-27 20:00:25,797 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 271 transitions, 4561 flow [2023-01-27 20:00:25,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 129.56756756756758) internal successors, (4794), 37 states have internal predecessors, (4794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:25,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:00:25,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:00:25,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-27 20:00:26,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:00:26,003 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:00:26,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:00:26,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1970275389, now seen corresponding path program 1 times [2023-01-27 20:00:26,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:00:26,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519631978] [2023-01-27 20:00:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:00:26,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:00:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:00:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:00:26,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:00:26,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519631978] [2023-01-27 20:00:26,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519631978] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:00:26,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857486595] [2023-01-27 20:00:26,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:00:26,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:00:26,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:00:26,309 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:00:26,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 20:00:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:00:26,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-27 20:00:26,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:00:26,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:26,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 111 [2023-01-27 20:00:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:00:26,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:00:26,907 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:26,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 165 [2023-01-27 20:00:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:00:27,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857486595] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:00:27,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:00:27,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-01-27 20:00:27,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187759937] [2023-01-27 20:00:27,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:00:27,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 20:00:27,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:00:27,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 20:00:27,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2023-01-27 20:00:27,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 483 [2023-01-27 20:00:27,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 271 transitions, 4561 flow. Second operand has 27 states, 27 states have (on average 165.22222222222223) internal successors, (4461), 27 states have internal predecessors, (4461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:27,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:00:27,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 483 [2023-01-27 20:00:27,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:00:29,263 INFO L130 PetriNetUnfolder]: 5541/10406 cut-off events. [2023-01-27 20:00:29,264 INFO L131 PetriNetUnfolder]: For 147387/147387 co-relation queries the response was YES. [2023-01-27 20:00:29,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75845 conditions, 10406 events. 5541/10406 cut-off events. For 147387/147387 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 84580 event pairs, 815 based on Foata normal form. 314/10720 useless extension candidates. Maximal degree in co-relation 75407. Up to 4092 conditions per place. [2023-01-27 20:00:29,337 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 696 selfloop transitions, 229 changer transitions 21/946 dead transitions. [2023-01-27 20:00:29,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 946 transitions, 17285 flow [2023-01-27 20:00:29,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 20:00:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 20:00:29,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3251 transitions. [2023-01-27 20:00:29,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35425520322545495 [2023-01-27 20:00:29,340 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3251 transitions. [2023-01-27 20:00:29,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3251 transitions. [2023-01-27 20:00:29,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:00:29,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3251 transitions. [2023-01-27 20:00:29,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 171.10526315789474) internal successors, (3251), 19 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:29,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:29,348 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:29,348 INFO L175 Difference]: Start difference. First operand has 189 places, 271 transitions, 4561 flow. Second operand 19 states and 3251 transitions. [2023-01-27 20:00:29,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 946 transitions, 17285 flow [2023-01-27 20:00:30,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 946 transitions, 16866 flow, removed 88 selfloop flow, removed 9 redundant places. [2023-01-27 20:00:30,270 INFO L231 Difference]: Finished difference. Result has 204 places, 492 transitions, 9058 flow [2023-01-27 20:00:30,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=4424, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9058, PETRI_PLACES=204, PETRI_TRANSITIONS=492} [2023-01-27 20:00:30,270 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 179 predicate places. [2023-01-27 20:00:30,271 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 492 transitions, 9058 flow [2023-01-27 20:00:30,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 165.22222222222223) internal successors, (4461), 27 states have internal predecessors, (4461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:30,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:00:30,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:00:30,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-01-27 20:00:30,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:00:30,476 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:00:30,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:00:30,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1997958036, now seen corresponding path program 2 times [2023-01-27 20:00:30,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:00:30,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499813873] [2023-01-27 20:00:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:00:30,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:00:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:00:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:00:30,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:00:30,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499813873] [2023-01-27 20:00:30,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499813873] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:00:30,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627143953] [2023-01-27 20:00:30,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:00:30,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:00:30,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:00:30,976 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:00:31,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-27 20:00:31,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 20:00:31,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:00:31,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-27 20:00:31,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:00:31,558 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:00:31,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:00:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:00:31,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:00:31,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627143953] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:00:31,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:00:31,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-01-27 20:00:31,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441485205] [2023-01-27 20:00:31,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:00:31,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 20:00:31,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:00:31,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 20:00:31,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:00:31,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 483 [2023-01-27 20:00:31,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 492 transitions, 9058 flow. Second operand has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:31,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:00:31,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 483 [2023-01-27 20:00:31,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:00:34,016 INFO L130 PetriNetUnfolder]: 5556/10466 cut-off events. [2023-01-27 20:00:34,017 INFO L131 PetriNetUnfolder]: For 171064/171064 co-relation queries the response was YES. [2023-01-27 20:00:34,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80752 conditions, 10466 events. 5556/10466 cut-off events. For 171064/171064 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 85792 event pairs, 2130 based on Foata normal form. 15/10481 useless extension candidates. Maximal degree in co-relation 78879. Up to 7629 conditions per place. [2023-01-27 20:00:34,099 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 454 selfloop transitions, 89 changer transitions 14/557 dead transitions. [2023-01-27 20:00:34,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 557 transitions, 11037 flow [2023-01-27 20:00:34,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:00:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:00:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1774 transitions. [2023-01-27 20:00:34,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33389798607189913 [2023-01-27 20:00:34,101 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1774 transitions. [2023-01-27 20:00:34,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1774 transitions. [2023-01-27 20:00:34,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:00:34,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1774 transitions. [2023-01-27 20:00:34,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 161.27272727272728) internal successors, (1774), 11 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:34,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:34,106 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:34,109 INFO L175 Difference]: Start difference. First operand has 204 places, 492 transitions, 9058 flow. Second operand 11 states and 1774 transitions. [2023-01-27 20:00:34,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 557 transitions, 11037 flow [2023-01-27 20:00:35,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 557 transitions, 10887 flow, removed 71 selfloop flow, removed 4 redundant places. [2023-01-27 20:00:35,422 INFO L231 Difference]: Finished difference. Result has 213 places, 500 transitions, 9337 flow [2023-01-27 20:00:35,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=8928, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9337, PETRI_PLACES=213, PETRI_TRANSITIONS=500} [2023-01-27 20:00:35,423 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 188 predicate places. [2023-01-27 20:00:35,423 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 500 transitions, 9337 flow [2023-01-27 20:00:35,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:35,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:00:35,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:00:35,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-27 20:00:35,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:00:35,628 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:00:35,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:00:35,629 INFO L85 PathProgramCache]: Analyzing trace with hash 773329696, now seen corresponding path program 3 times [2023-01-27 20:00:35,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:00:35,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542348921] [2023-01-27 20:00:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:00:35,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:00:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:00:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:00:35,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:00:35,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542348921] [2023-01-27 20:00:35,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542348921] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:00:35,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106931000] [2023-01-27 20:00:35,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:00:35,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:00:35,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:00:35,992 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:00:35,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-27 20:00:36,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-01-27 20:00:36,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:00:36,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-27 20:00:36,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:00:36,492 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:00:36,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:00:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:00:36,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:00:36,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106931000] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:00:36,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:00:36,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-01-27 20:00:36,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228127906] [2023-01-27 20:00:36,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:00:36,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 20:00:36,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:00:36,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 20:00:36,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:00:36,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 483 [2023-01-27 20:00:36,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 500 transitions, 9337 flow. Second operand has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:36,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:00:36,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 483 [2023-01-27 20:00:36,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:00:38,950 INFO L130 PetriNetUnfolder]: 5556/10476 cut-off events. [2023-01-27 20:00:38,950 INFO L131 PetriNetUnfolder]: For 177652/177652 co-relation queries the response was YES. [2023-01-27 20:00:38,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81812 conditions, 10476 events. 5556/10476 cut-off events. For 177652/177652 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 85763 event pairs, 2134 based on Foata normal form. 25/10501 useless extension candidates. Maximal degree in co-relation 81181. Up to 7629 conditions per place. [2023-01-27 20:00:39,036 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 452 selfloop transitions, 81 changer transitions 19/552 dead transitions. [2023-01-27 20:00:39,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 552 transitions, 11057 flow [2023-01-27 20:00:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:00:39,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:00:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1775 transitions. [2023-01-27 20:00:39,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33408620365142105 [2023-01-27 20:00:39,042 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1775 transitions. [2023-01-27 20:00:39,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1775 transitions. [2023-01-27 20:00:39,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:00:39,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1775 transitions. [2023-01-27 20:00:39,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 161.36363636363637) internal successors, (1775), 11 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:39,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:39,050 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:39,050 INFO L175 Difference]: Start difference. First operand has 213 places, 500 transitions, 9337 flow. Second operand 11 states and 1775 transitions. [2023-01-27 20:00:39,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 552 transitions, 11057 flow [2023-01-27 20:00:40,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 552 transitions, 10869 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-01-27 20:00:40,335 INFO L231 Difference]: Finished difference. Result has 216 places, 492 transitions, 9185 flow [2023-01-27 20:00:40,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=9153, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9185, PETRI_PLACES=216, PETRI_TRANSITIONS=492} [2023-01-27 20:00:40,336 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 191 predicate places. [2023-01-27 20:00:40,336 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 492 transitions, 9185 flow [2023-01-27 20:00:40,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:40,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:00:40,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:00:40,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-01-27 20:00:40,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-01-27 20:00:40,541 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:00:40,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:00:40,541 INFO L85 PathProgramCache]: Analyzing trace with hash 176099406, now seen corresponding path program 4 times [2023-01-27 20:00:40,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:00:40,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685214694] [2023-01-27 20:00:40,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:00:40,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:00:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:00:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:00:40,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:00:40,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685214694] [2023-01-27 20:00:40,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685214694] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:00:40,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218694336] [2023-01-27 20:00:40,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:00:40,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:00:40,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:00:40,976 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:00:40,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 20:00:41,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:00:41,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:00:41,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 46 conjunts are in the unsatisfiable core [2023-01-27 20:00:41,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:00:41,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 20:00:41,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:00:41,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:00:41,320 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:00:41,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 24 [2023-01-27 20:00:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:00:41,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:00:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:00:42,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218694336] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:00:42,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:00:42,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 11] total 23 [2023-01-27 20:00:42,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140773244] [2023-01-27 20:00:42,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:00:42,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 20:00:42,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:00:42,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 20:00:42,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:00:42,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 483 [2023-01-27 20:00:42,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 492 transitions, 9185 flow. Second operand has 8 states, 8 states have (on average 166.5) internal successors, (1332), 8 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:42,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:00:42,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 483 [2023-01-27 20:00:42,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:00:45,308 INFO L130 PetriNetUnfolder]: 6111/11546 cut-off events. [2023-01-27 20:00:45,308 INFO L131 PetriNetUnfolder]: For 203729/203729 co-relation queries the response was YES. [2023-01-27 20:00:45,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92624 conditions, 11546 events. 6111/11546 cut-off events. For 203729/203729 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 96230 event pairs, 2380 based on Foata normal form. 5/11551 useless extension candidates. Maximal degree in co-relation 91902. Up to 9866 conditions per place. [2023-01-27 20:00:45,392 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 566 selfloop transitions, 54 changer transitions 8/628 dead transitions. [2023-01-27 20:00:45,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 628 transitions, 13070 flow [2023-01-27 20:00:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 20:00:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 20:00:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1378 transitions. [2023-01-27 20:00:45,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35662525879917184 [2023-01-27 20:00:45,394 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1378 transitions. [2023-01-27 20:00:45,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1378 transitions. [2023-01-27 20:00:45,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:00:45,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1378 transitions. [2023-01-27 20:00:45,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 172.25) internal successors, (1378), 8 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:45,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:45,397 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:45,397 INFO L175 Difference]: Start difference. First operand has 216 places, 492 transitions, 9185 flow. Second operand 8 states and 1378 transitions. [2023-01-27 20:00:45,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 628 transitions, 13070 flow [2023-01-27 20:00:46,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 628 transitions, 12734 flow, removed 39 selfloop flow, removed 10 redundant places. [2023-01-27 20:00:46,962 INFO L231 Difference]: Finished difference. Result has 215 places, 528 transitions, 10116 flow [2023-01-27 20:00:46,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=9005, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10116, PETRI_PLACES=215, PETRI_TRANSITIONS=528} [2023-01-27 20:00:46,963 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 190 predicate places. [2023-01-27 20:00:46,963 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 528 transitions, 10116 flow [2023-01-27 20:00:46,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 166.5) internal successors, (1332), 8 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:46,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:00:46,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:00:46,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-01-27 20:00:47,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-01-27 20:00:47,168 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:00:47,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:00:47,168 INFO L85 PathProgramCache]: Analyzing trace with hash 706975026, now seen corresponding path program 5 times [2023-01-27 20:00:47,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:00:47,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630658932] [2023-01-27 20:00:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:00:47,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:00:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:00:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:00:47,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:00:47,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630658932] [2023-01-27 20:00:47,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630658932] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:00:47,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142721196] [2023-01-27 20:00:47,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:00:47,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:00:47,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:00:47,682 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:00:47,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 20:00:47,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:00:47,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:00:47,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-27 20:00:47,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:00:47,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 20:00:47,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:00:47,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:00:48,182 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:00:48,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:00:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:00:48,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:00:51,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:51,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-01-27 20:00:51,018 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:00:51,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 253 [2023-01-27 20:00:51,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:51,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 222 [2023-01-27 20:00:51,035 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:51,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 206 [2023-01-27 20:00:51,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:51,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-01-27 20:00:51,282 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:00:51,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 566 treesize of output 509 [2023-01-27 20:00:51,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:51,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-01-27 20:00:51,311 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:00:51,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-01-27 20:00:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:00:51,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142721196] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:00:51,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:00:51,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 33 [2023-01-27 20:00:51,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14859313] [2023-01-27 20:00:51,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:00:51,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 20:00:51,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:00:51,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 20:00:51,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=971, Unknown=11, NotChecked=0, Total=1190 [2023-01-27 20:00:51,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 483 [2023-01-27 20:00:51,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 528 transitions, 10116 flow. Second operand has 35 states, 35 states have (on average 129.5142857142857) internal successors, (4533), 35 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:51,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:00:51,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 483 [2023-01-27 20:00:51,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:00:55,694 INFO L130 PetriNetUnfolder]: 6007/11563 cut-off events. [2023-01-27 20:00:55,694 INFO L131 PetriNetUnfolder]: For 199959/199959 co-relation queries the response was YES. [2023-01-27 20:00:55,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90881 conditions, 11563 events. 6007/11563 cut-off events. For 199959/199959 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 98595 event pairs, 1584 based on Foata normal form. 130/11693 useless extension candidates. Maximal degree in co-relation 90156. Up to 5748 conditions per place. [2023-01-27 20:00:55,781 INFO L137 encePairwiseOnDemand]: 467/483 looper letters, 393 selfloop transitions, 240 changer transitions 32/665 dead transitions. [2023-01-27 20:00:55,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 665 transitions, 13009 flow [2023-01-27 20:00:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 20:00:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 20:00:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2963 transitions. [2023-01-27 20:00:55,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27884434406173536 [2023-01-27 20:00:55,784 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2963 transitions. [2023-01-27 20:00:55,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2963 transitions. [2023-01-27 20:00:55,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:00:55,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2963 transitions. [2023-01-27 20:00:55,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 134.6818181818182) internal successors, (2963), 22 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:55,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 483.0) internal successors, (11109), 23 states have internal predecessors, (11109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:55,791 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 483.0) internal successors, (11109), 23 states have internal predecessors, (11109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:55,791 INFO L175 Difference]: Start difference. First operand has 215 places, 528 transitions, 10116 flow. Second operand 22 states and 2963 transitions. [2023-01-27 20:00:55,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 665 transitions, 13009 flow [2023-01-27 20:00:57,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 665 transitions, 12948 flow, removed 21 selfloop flow, removed 2 redundant places. [2023-01-27 20:00:57,387 INFO L231 Difference]: Finished difference. Result has 240 places, 557 transitions, 11199 flow [2023-01-27 20:00:57,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=9902, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11199, PETRI_PLACES=240, PETRI_TRANSITIONS=557} [2023-01-27 20:00:57,388 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 215 predicate places. [2023-01-27 20:00:57,388 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 557 transitions, 11199 flow [2023-01-27 20:00:57,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 129.5142857142857) internal successors, (4533), 35 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:57,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:00:57,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:00:57,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-27 20:00:57,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-27 20:00:57,598 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:00:57,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:00:57,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1885109360, now seen corresponding path program 6 times [2023-01-27 20:00:57,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:00:57,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660099093] [2023-01-27 20:00:57,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:00:57,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:00:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:00:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:00:58,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:00:58,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660099093] [2023-01-27 20:00:58,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660099093] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:00:58,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691199227] [2023-01-27 20:00:58,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:00:58,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:00:58,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:00:58,068 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:00:58,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 20:00:58,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-01-27 20:00:58,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:00:58,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-27 20:00:58,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:00:58,485 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:00:58,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:00:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:00:58,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:00:58,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691199227] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:00:58,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:00:58,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-01-27 20:00:58,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082359425] [2023-01-27 20:00:58,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:00:58,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 20:00:58,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:00:58,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 20:00:58,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:00:58,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 483 [2023-01-27 20:00:58,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 557 transitions, 11199 flow. Second operand has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:00:58,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:00:58,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 483 [2023-01-27 20:00:58,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:01:01,255 INFO L130 PetriNetUnfolder]: 5962/11478 cut-off events. [2023-01-27 20:01:01,255 INFO L131 PetriNetUnfolder]: For 214391/214391 co-relation queries the response was YES. [2023-01-27 20:01:01,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93355 conditions, 11478 events. 5962/11478 cut-off events. For 214391/214391 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 97922 event pairs, 2155 based on Foata normal form. 10/11488 useless extension candidates. Maximal degree in co-relation 92788. Up to 7709 conditions per place. [2023-01-27 20:01:01,349 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 522 selfloop transitions, 68 changer transitions 28/618 dead transitions. [2023-01-27 20:01:01,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 618 transitions, 13102 flow [2023-01-27 20:01:01,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:01:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:01:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2087 transitions. [2023-01-27 20:01:01,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33237776716037587 [2023-01-27 20:01:01,351 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2087 transitions. [2023-01-27 20:01:01,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2087 transitions. [2023-01-27 20:01:01,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:01:01,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2087 transitions. [2023-01-27 20:01:01,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 160.53846153846155) internal successors, (2087), 13 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:01,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:01,356 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:01,356 INFO L175 Difference]: Start difference. First operand has 240 places, 557 transitions, 11199 flow. Second operand 13 states and 2087 transitions. [2023-01-27 20:01:01,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 618 transitions, 13102 flow [2023-01-27 20:01:03,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 618 transitions, 12536 flow, removed 114 selfloop flow, removed 14 redundant places. [2023-01-27 20:01:03,108 INFO L231 Difference]: Finished difference. Result has 239 places, 547 transitions, 10575 flow [2023-01-27 20:01:03,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10687, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10575, PETRI_PLACES=239, PETRI_TRANSITIONS=547} [2023-01-27 20:01:03,109 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 214 predicate places. [2023-01-27 20:01:03,109 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 547 transitions, 10575 flow [2023-01-27 20:01:03,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:03,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:01:03,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:01:03,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-27 20:01:03,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:01:03,314 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:01:03,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:01:03,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1136977276, now seen corresponding path program 7 times [2023-01-27 20:01:03,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:01:03,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795029542] [2023-01-27 20:01:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:01:03,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:01:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:01:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:01:03,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:01:03,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795029542] [2023-01-27 20:01:03,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795029542] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:01:03,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472000306] [2023-01-27 20:01:03,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:01:03,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:01:03,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:01:03,785 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:01:03,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 20:01:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:01:03,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-27 20:01:03,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:01:03,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 20:01:04,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:01:04,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:01:04,306 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:01:04,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:01:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:01:04,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:01:09,103 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:01:09,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-01-27 20:01:09,112 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:01:09,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 253 [2023-01-27 20:01:09,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:01:09,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 222 [2023-01-27 20:01:09,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:01:09,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 206 [2023-01-27 20:01:09,419 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:01:09,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-01-27 20:01:09,429 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:01:09,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 253 [2023-01-27 20:01:09,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:01:09,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 222 [2023-01-27 20:01:09,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:01:09,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 206 [2023-01-27 20:01:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:01:09,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472000306] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:01:09,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:01:09,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 34 [2023-01-27 20:01:09,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193872045] [2023-01-27 20:01:09,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:01:09,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-27 20:01:09,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:01:09,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-27 20:01:09,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1075, Unknown=16, NotChecked=0, Total=1260 [2023-01-27 20:01:09,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 483 [2023-01-27 20:01:09,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 547 transitions, 10575 flow. Second operand has 36 states, 36 states have (on average 129.58333333333334) internal successors, (4665), 36 states have internal predecessors, (4665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:09,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:01:09,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 483 [2023-01-27 20:01:09,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:01:14,176 INFO L130 PetriNetUnfolder]: 6314/12182 cut-off events. [2023-01-27 20:01:14,177 INFO L131 PetriNetUnfolder]: For 206362/206362 co-relation queries the response was YES. [2023-01-27 20:01:14,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97412 conditions, 12182 events. 6314/12182 cut-off events. For 206362/206362 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 105232 event pairs, 1949 based on Foata normal form. 30/12212 useless extension candidates. Maximal degree in co-relation 96625. Up to 7037 conditions per place. [2023-01-27 20:01:14,299 INFO L137 encePairwiseOnDemand]: 467/483 looper letters, 457 selfloop transitions, 146 changer transitions 64/667 dead transitions. [2023-01-27 20:01:14,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 667 transitions, 13351 flow [2023-01-27 20:01:14,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 20:01:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 20:01:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3474 transitions. [2023-01-27 20:01:14,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2766364070711897 [2023-01-27 20:01:14,302 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3474 transitions. [2023-01-27 20:01:14,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3474 transitions. [2023-01-27 20:01:14,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:01:14,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3474 transitions. [2023-01-27 20:01:14,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 133.6153846153846) internal successors, (3474), 26 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:14,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 483.0) internal successors, (13041), 27 states have internal predecessors, (13041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:14,327 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 483.0) internal successors, (13041), 27 states have internal predecessors, (13041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:14,328 INFO L175 Difference]: Start difference. First operand has 239 places, 547 transitions, 10575 flow. Second operand 26 states and 3474 transitions. [2023-01-27 20:01:14,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 667 transitions, 13351 flow [2023-01-27 20:01:16,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 667 transitions, 13127 flow, removed 26 selfloop flow, removed 9 redundant places. [2023-01-27 20:01:16,545 INFO L231 Difference]: Finished difference. Result has 264 places, 533 transitions, 10593 flow [2023-01-27 20:01:16,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10383, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10593, PETRI_PLACES=264, PETRI_TRANSITIONS=533} [2023-01-27 20:01:16,546 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 239 predicate places. [2023-01-27 20:01:16,546 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 533 transitions, 10593 flow [2023-01-27 20:01:16,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 129.58333333333334) internal successors, (4665), 36 states have internal predecessors, (4665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:16,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:01:16,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:01:16,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-01-27 20:01:16,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-27 20:01:16,753 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:01:16,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:01:16,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1536392364, now seen corresponding path program 8 times [2023-01-27 20:01:16,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:01:16,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624167133] [2023-01-27 20:01:16,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:01:16,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:01:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:01:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:01:17,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:01:17,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624167133] [2023-01-27 20:01:17,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624167133] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:01:17,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75543644] [2023-01-27 20:01:17,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:01:17,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:01:17,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:01:17,159 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:01:17,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-27 20:01:17,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 20:01:17,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:01:17,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-27 20:01:17,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:01:17,591 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:01:17,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:01:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:01:17,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:01:17,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75543644] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:01:17,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:01:17,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-01-27 20:01:17,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091749125] [2023-01-27 20:01:17,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:01:17,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 20:01:17,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:01:17,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 20:01:17,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:01:17,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 483 [2023-01-27 20:01:17,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 533 transitions, 10593 flow. Second operand has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:17,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:01:17,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 483 [2023-01-27 20:01:17,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:01:20,184 INFO L130 PetriNetUnfolder]: 6074/11662 cut-off events. [2023-01-27 20:01:20,184 INFO L131 PetriNetUnfolder]: For 250409/250409 co-relation queries the response was YES. [2023-01-27 20:01:20,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98583 conditions, 11662 events. 6074/11662 cut-off events. For 250409/250409 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 99818 event pairs, 2270 based on Foata normal form. 10/11672 useless extension candidates. Maximal degree in co-relation 97715. Up to 7757 conditions per place. [2023-01-27 20:01:20,307 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 473 selfloop transitions, 73 changer transitions 17/563 dead transitions. [2023-01-27 20:01:20,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 563 transitions, 11971 flow [2023-01-27 20:01:20,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:01:20,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:01:20,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1607 transitions. [2023-01-27 20:01:20,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.332712215320911 [2023-01-27 20:01:20,310 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1607 transitions. [2023-01-27 20:01:20,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1607 transitions. [2023-01-27 20:01:20,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:01:20,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1607 transitions. [2023-01-27 20:01:20,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 160.7) internal successors, (1607), 10 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:20,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:20,313 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:20,313 INFO L175 Difference]: Start difference. First operand has 264 places, 533 transitions, 10593 flow. Second operand 10 states and 1607 transitions. [2023-01-27 20:01:20,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 563 transitions, 11971 flow [2023-01-27 20:01:22,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 563 transitions, 11605 flow, removed 82 selfloop flow, removed 15 redundant places. [2023-01-27 20:01:22,617 INFO L231 Difference]: Finished difference. Result has 253 places, 531 transitions, 10354 flow [2023-01-27 20:01:22,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10243, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10354, PETRI_PLACES=253, PETRI_TRANSITIONS=531} [2023-01-27 20:01:22,619 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 228 predicate places. [2023-01-27 20:01:22,619 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 531 transitions, 10354 flow [2023-01-27 20:01:22,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:22,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:01:22,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:01:22,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-01-27 20:01:22,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-27 20:01:22,825 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:01:22,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:01:22,825 INFO L85 PathProgramCache]: Analyzing trace with hash 86442636, now seen corresponding path program 9 times [2023-01-27 20:01:22,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:01:22,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095021852] [2023-01-27 20:01:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:01:22,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:01:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:01:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:01:23,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:01:23,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095021852] [2023-01-27 20:01:23,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095021852] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:01:23,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523826996] [2023-01-27 20:01:23,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:01:23,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:01:23,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:01:23,352 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:01:23,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-27 20:01:23,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-01-27 20:01:23,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:01:23,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-27 20:01:23,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:01:23,769 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:01:23,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:01:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:01:23,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:01:23,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523826996] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:01:23,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:01:23,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-01-27 20:01:23,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668188044] [2023-01-27 20:01:23,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:01:23,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 20:01:23,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:01:23,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 20:01:23,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:01:23,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 483 [2023-01-27 20:01:23,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 531 transitions, 10354 flow. Second operand has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:23,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:01:23,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 483 [2023-01-27 20:01:23,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:01:26,538 INFO L130 PetriNetUnfolder]: 5984/11477 cut-off events. [2023-01-27 20:01:26,538 INFO L131 PetriNetUnfolder]: For 241783/241783 co-relation queries the response was YES. [2023-01-27 20:01:26,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95276 conditions, 11477 events. 5984/11477 cut-off events. For 241783/241783 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 97121 event pairs, 1782 based on Foata normal form. 35/11512 useless extension candidates. Maximal degree in co-relation 94816. Up to 7692 conditions per place. [2023-01-27 20:01:26,643 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 322 selfloop transitions, 229 changer transitions 12/563 dead transitions. [2023-01-27 20:01:26,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 563 transitions, 11703 flow [2023-01-27 20:01:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:01:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:01:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1762 transitions. [2023-01-27 20:01:26,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33163937511763597 [2023-01-27 20:01:26,651 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1762 transitions. [2023-01-27 20:01:26,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1762 transitions. [2023-01-27 20:01:26,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:01:26,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1762 transitions. [2023-01-27 20:01:26,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 160.1818181818182) internal successors, (1762), 11 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:26,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:26,669 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:26,669 INFO L175 Difference]: Start difference. First operand has 253 places, 531 transitions, 10354 flow. Second operand 11 states and 1762 transitions. [2023-01-27 20:01:26,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 563 transitions, 11703 flow [2023-01-27 20:01:28,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 563 transitions, 11539 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-01-27 20:01:28,644 INFO L231 Difference]: Finished difference. Result has 252 places, 530 transitions, 10659 flow [2023-01-27 20:01:28,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10179, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10659, PETRI_PLACES=252, PETRI_TRANSITIONS=530} [2023-01-27 20:01:28,645 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 227 predicate places. [2023-01-27 20:01:28,645 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 530 transitions, 10659 flow [2023-01-27 20:01:28,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:28,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:01:28,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:01:28,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-27 20:01:28,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:01:28,850 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:01:28,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:01:28,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2043106630, now seen corresponding path program 10 times [2023-01-27 20:01:28,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:01:28,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126601398] [2023-01-27 20:01:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:01:28,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:01:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:01:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:01:29,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:01:29,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126601398] [2023-01-27 20:01:29,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126601398] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:01:29,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795128040] [2023-01-27 20:01:29,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:01:29,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:01:29,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:01:29,460 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:01:29,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-27 20:01:29,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:01:29,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:01:29,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-27 20:01:29,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:01:29,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 20:01:29,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:01:29,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:01:29,975 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:01:29,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:01:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:01:30,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:01:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:01:30,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795128040] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:01:30,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:01:30,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 11] total 30 [2023-01-27 20:01:30,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128546736] [2023-01-27 20:01:30,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:01:30,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 20:01:30,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:01:30,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 20:01:30,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2023-01-27 20:01:30,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 483 [2023-01-27 20:01:30,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 530 transitions, 10659 flow. Second operand has 8 states, 8 states have (on average 166.5) internal successors, (1332), 8 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:30,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:01:30,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 483 [2023-01-27 20:01:30,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:01:34,177 INFO L130 PetriNetUnfolder]: 6211/12217 cut-off events. [2023-01-27 20:01:34,178 INFO L131 PetriNetUnfolder]: For 277530/277530 co-relation queries the response was YES. [2023-01-27 20:01:34,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102996 conditions, 12217 events. 6211/12217 cut-off events. For 277530/277530 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 107244 event pairs, 1568 based on Foata normal form. 5/12222 useless extension candidates. Maximal degree in co-relation 101995. Up to 7182 conditions per place. [2023-01-27 20:01:34,267 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 347 selfloop transitions, 237 changer transitions 51/635 dead transitions. [2023-01-27 20:01:34,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 635 transitions, 13865 flow [2023-01-27 20:01:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:01:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:01:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1724 transitions. [2023-01-27 20:01:34,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.356935817805383 [2023-01-27 20:01:34,271 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1724 transitions. [2023-01-27 20:01:34,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1724 transitions. [2023-01-27 20:01:34,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:01:34,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1724 transitions. [2023-01-27 20:01:34,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 172.4) internal successors, (1724), 10 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:34,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:34,283 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:34,283 INFO L175 Difference]: Start difference. First operand has 252 places, 530 transitions, 10659 flow. Second operand 10 states and 1724 transitions. [2023-01-27 20:01:34,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 635 transitions, 13865 flow [2023-01-27 20:01:36,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 635 transitions, 13315 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-01-27 20:01:36,267 INFO L231 Difference]: Finished difference. Result has 257 places, 553 transitions, 11282 flow [2023-01-27 20:01:36,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10233, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11282, PETRI_PLACES=257, PETRI_TRANSITIONS=553} [2023-01-27 20:01:36,268 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 232 predicate places. [2023-01-27 20:01:36,268 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 553 transitions, 11282 flow [2023-01-27 20:01:36,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 166.5) internal successors, (1332), 8 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:36,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:01:36,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:01:36,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-01-27 20:01:36,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:01:36,477 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:01:36,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:01:36,477 INFO L85 PathProgramCache]: Analyzing trace with hash -583152636, now seen corresponding path program 11 times [2023-01-27 20:01:36,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:01:36,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576398498] [2023-01-27 20:01:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:01:36,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:01:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:01:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:01:36,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:01:36,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576398498] [2023-01-27 20:01:36,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576398498] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:01:36,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105805775] [2023-01-27 20:01:36,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:01:36,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:01:36,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:01:36,982 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:01:36,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-27 20:01:37,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:01:37,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:01:37,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-27 20:01:37,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:01:37,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 20:01:37,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:01:37,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:01:37,439 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:01:37,442 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:01:37,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:01:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:01:37,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:01:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:01:37,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105805775] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:01:37,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:01:37,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11] total 29 [2023-01-27 20:01:37,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143325643] [2023-01-27 20:01:37,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:01:37,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:01:37,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:01:37,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:01:37,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2023-01-27 20:01:37,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 483 [2023-01-27 20:01:37,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 553 transitions, 11282 flow. Second operand has 11 states, 11 states have (on average 145.8181818181818) internal successors, (1604), 11 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:37,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:01:37,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 483 [2023-01-27 20:01:37,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:01:41,078 INFO L130 PetriNetUnfolder]: 5854/11738 cut-off events. [2023-01-27 20:01:41,078 INFO L131 PetriNetUnfolder]: For 262114/262114 co-relation queries the response was YES. [2023-01-27 20:01:41,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98403 conditions, 11738 events. 5854/11738 cut-off events. For 262114/262114 co-relation queries the response was YES. Maximal size of possible extension queue 800. Compared 104361 event pairs, 1773 based on Foata normal form. 5/11743 useless extension candidates. Maximal degree in co-relation 98189. Up to 7971 conditions per place. [2023-01-27 20:01:41,177 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 331 selfloop transitions, 236 changer transitions 19/586 dead transitions. [2023-01-27 20:01:41,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 586 transitions, 12707 flow [2023-01-27 20:01:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:01:41,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:01:41,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1644 transitions. [2023-01-27 20:01:41,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3094297007340486 [2023-01-27 20:01:41,180 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1644 transitions. [2023-01-27 20:01:41,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1644 transitions. [2023-01-27 20:01:41,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:01:41,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1644 transitions. [2023-01-27 20:01:41,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 149.45454545454547) internal successors, (1644), 11 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:41,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:41,196 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:41,196 INFO L175 Difference]: Start difference. First operand has 257 places, 553 transitions, 11282 flow. Second operand 11 states and 1644 transitions. [2023-01-27 20:01:41,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 586 transitions, 12707 flow [2023-01-27 20:01:43,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 586 transitions, 12649 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-01-27 20:01:43,596 INFO L231 Difference]: Finished difference. Result has 263 places, 545 transitions, 11488 flow [2023-01-27 20:01:43,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11226, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11488, PETRI_PLACES=263, PETRI_TRANSITIONS=545} [2023-01-27 20:01:43,597 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 238 predicate places. [2023-01-27 20:01:43,597 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 545 transitions, 11488 flow [2023-01-27 20:01:43,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 145.8181818181818) internal successors, (1604), 11 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:43,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:01:43,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:01:43,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-01-27 20:01:43,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:01:43,802 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:01:43,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:01:43,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1270141606, now seen corresponding path program 12 times [2023-01-27 20:01:43,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:01:43,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099645035] [2023-01-27 20:01:43,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:01:43,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:01:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:01:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:01:44,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:01:44,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099645035] [2023-01-27 20:01:44,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099645035] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:01:44,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231749143] [2023-01-27 20:01:44,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:01:44,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:01:44,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:01:44,273 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:01:44,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-27 20:01:44,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-01-27 20:01:44,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:01:44,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-27 20:01:44,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:01:44,632 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:01:44,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:01:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:01:44,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:01:44,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231749143] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:01:44,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:01:44,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2023-01-27 20:01:44,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858837535] [2023-01-27 20:01:44,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:01:44,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 20:01:44,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:01:44,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 20:01:44,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:01:44,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 483 [2023-01-27 20:01:44,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 545 transitions, 11488 flow. Second operand has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:44,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:01:44,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 483 [2023-01-27 20:01:44,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:01:47,592 INFO L130 PetriNetUnfolder]: 5819/11653 cut-off events. [2023-01-27 20:01:47,592 INFO L131 PetriNetUnfolder]: For 266575/266575 co-relation queries the response was YES. [2023-01-27 20:01:47,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98564 conditions, 11653 events. 5819/11653 cut-off events. For 266575/266575 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 103332 event pairs, 1801 based on Foata normal form. 5/11658 useless extension candidates. Maximal degree in co-relation 98172. Up to 7977 conditions per place. [2023-01-27 20:01:47,691 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 326 selfloop transitions, 228 changer transitions 18/572 dead transitions. [2023-01-27 20:01:47,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 572 transitions, 12746 flow [2023-01-27 20:01:47,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 20:01:47,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 20:01:47,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1917 transitions. [2023-01-27 20:01:47,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3307453416149068 [2023-01-27 20:01:47,693 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1917 transitions. [2023-01-27 20:01:47,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1917 transitions. [2023-01-27 20:01:47,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:01:47,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1917 transitions. [2023-01-27 20:01:47,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.75) internal successors, (1917), 12 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:47,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:47,697 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:47,697 INFO L175 Difference]: Start difference. First operand has 263 places, 545 transitions, 11488 flow. Second operand 12 states and 1917 transitions. [2023-01-27 20:01:47,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 572 transitions, 12746 flow [2023-01-27 20:01:49,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 572 transitions, 12215 flow, removed 15 selfloop flow, removed 13 redundant places. [2023-01-27 20:01:49,455 INFO L231 Difference]: Finished difference. Result has 257 places, 533 transitions, 11200 flow [2023-01-27 20:01:49,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10961, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11200, PETRI_PLACES=257, PETRI_TRANSITIONS=533} [2023-01-27 20:01:49,455 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 232 predicate places. [2023-01-27 20:01:49,455 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 533 transitions, 11200 flow [2023-01-27 20:01:49,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:49,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:01:49,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:01:49,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-01-27 20:01:49,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:01:49,661 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:01:49,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:01:49,661 INFO L85 PathProgramCache]: Analyzing trace with hash 785848930, now seen corresponding path program 13 times [2023-01-27 20:01:49,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:01:49,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774563736] [2023-01-27 20:01:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:01:49,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:01:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:01:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:01:50,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:01:50,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774563736] [2023-01-27 20:01:50,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774563736] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:01:50,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328909180] [2023-01-27 20:01:50,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:01:50,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:01:50,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:01:50,248 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:01:50,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-27 20:01:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:01:50,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-27 20:01:50,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:01:50,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 20:01:50,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:01:50,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:01:50,800 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:01:50,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:01:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:01:50,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:01:55,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:01:55,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-01-27 20:01:55,752 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:01:55,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1142 treesize of output 1021 [2023-01-27 20:01:55,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:01:55,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-01-27 20:01:55,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:01:55,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-01-27 20:01:56,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:01:56,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-01-27 20:01:56,019 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:01:56,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 253 [2023-01-27 20:01:56,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:01:56,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-01-27 20:01:56,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:01:56,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-01-27 20:01:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:01:56,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328909180] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:01:56,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:01:56,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 36 [2023-01-27 20:01:56,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196295728] [2023-01-27 20:01:56,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:01:56,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-27 20:01:56,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:01:56,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-27 20:01:56,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1145, Unknown=18, NotChecked=0, Total=1406 [2023-01-27 20:01:56,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 483 [2023-01-27 20:01:56,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 533 transitions, 11200 flow. Second operand has 38 states, 38 states have (on average 129.57894736842104) internal successors, (4924), 38 states have internal predecessors, (4924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:01:56,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:01:56,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 483 [2023-01-27 20:01:56,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:02:02,629 INFO L130 PetriNetUnfolder]: 5904/11630 cut-off events. [2023-01-27 20:02:02,629 INFO L131 PetriNetUnfolder]: For 277570/277570 co-relation queries the response was YES. [2023-01-27 20:02:02,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99639 conditions, 11630 events. 5904/11630 cut-off events. For 277570/277570 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 101410 event pairs, 1206 based on Foata normal form. 20/11650 useless extension candidates. Maximal degree in co-relation 99407. Up to 6650 conditions per place. [2023-01-27 20:02:02,736 INFO L137 encePairwiseOnDemand]: 468/483 looper letters, 478 selfloop transitions, 307 changer transitions 59/844 dead transitions. [2023-01-27 20:02:02,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 844 transitions, 17140 flow [2023-01-27 20:02:02,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-01-27 20:02:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-01-27 20:02:02,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6512 transitions. [2023-01-27 20:02:02,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27515105421050406 [2023-01-27 20:02:02,741 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6512 transitions. [2023-01-27 20:02:02,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6512 transitions. [2023-01-27 20:02:02,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:02:02,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6512 transitions. [2023-01-27 20:02:02,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 132.89795918367346) internal successors, (6512), 49 states have internal predecessors, (6512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:02,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 483.0) internal successors, (24150), 50 states have internal predecessors, (24150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:02,756 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 483.0) internal successors, (24150), 50 states have internal predecessors, (24150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:02,756 INFO L175 Difference]: Start difference. First operand has 257 places, 533 transitions, 11200 flow. Second operand 49 states and 6512 transitions. [2023-01-27 20:02:02,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 844 transitions, 17140 flow [2023-01-27 20:02:04,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 844 transitions, 16193 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-01-27 20:02:04,812 INFO L231 Difference]: Finished difference. Result has 306 places, 569 transitions, 12173 flow [2023-01-27 20:02:04,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10198, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=12173, PETRI_PLACES=306, PETRI_TRANSITIONS=569} [2023-01-27 20:02:04,812 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 281 predicate places. [2023-01-27 20:02:04,812 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 569 transitions, 12173 flow [2023-01-27 20:02:04,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 129.57894736842104) internal successors, (4924), 38 states have internal predecessors, (4924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:04,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:02:04,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:02:04,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-27 20:02:05,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-01-27 20:02:05,018 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:02:05,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:02:05,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1895045882, now seen corresponding path program 14 times [2023-01-27 20:02:05,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:02:05,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726075247] [2023-01-27 20:02:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:02:05,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:02:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:02:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:02:05,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:02:05,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726075247] [2023-01-27 20:02:05,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726075247] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:02:05,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752318118] [2023-01-27 20:02:05,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:02:05,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:02:05,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:02:05,415 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:02:05,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-27 20:02:05,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 20:02:05,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:02:05,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-27 20:02:05,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:02:05,898 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:02:05,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:02:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:02:05,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:02:05,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752318118] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:02:05,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:02:05,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-01-27 20:02:05,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269316529] [2023-01-27 20:02:05,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:02:05,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 20:02:05,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:02:05,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 20:02:05,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:02:05,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 483 [2023-01-27 20:02:05,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 569 transitions, 12173 flow. Second operand has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:05,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:02:05,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 483 [2023-01-27 20:02:05,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:02:08,840 INFO L130 PetriNetUnfolder]: 5837/11448 cut-off events. [2023-01-27 20:02:08,841 INFO L131 PetriNetUnfolder]: For 330553/330553 co-relation queries the response was YES. [2023-01-27 20:02:08,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102415 conditions, 11448 events. 5837/11448 cut-off events. For 330553/330553 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 99516 event pairs, 2046 based on Foata normal form. 5/11453 useless extension candidates. Maximal degree in co-relation 102318. Up to 7869 conditions per place. [2023-01-27 20:02:08,946 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 532 selfloop transitions, 56 changer transitions 25/613 dead transitions. [2023-01-27 20:02:08,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 613 transitions, 13993 flow [2023-01-27 20:02:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:02:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:02:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1770 transitions. [2023-01-27 20:02:08,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3331451157538114 [2023-01-27 20:02:08,952 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1770 transitions. [2023-01-27 20:02:08,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1770 transitions. [2023-01-27 20:02:08,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:02:08,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1770 transitions. [2023-01-27 20:02:08,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 160.9090909090909) internal successors, (1770), 11 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:08,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:08,955 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:08,955 INFO L175 Difference]: Start difference. First operand has 306 places, 569 transitions, 12173 flow. Second operand 11 states and 1770 transitions. [2023-01-27 20:02:08,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 613 transitions, 13993 flow [2023-01-27 20:02:11,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 613 transitions, 13536 flow, removed 196 selfloop flow, removed 19 redundant places. [2023-01-27 20:02:11,253 INFO L231 Difference]: Finished difference. Result has 278 places, 560 transitions, 11681 flow [2023-01-27 20:02:11,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11818, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11681, PETRI_PLACES=278, PETRI_TRANSITIONS=560} [2023-01-27 20:02:11,253 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 253 predicate places. [2023-01-27 20:02:11,253 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 560 transitions, 11681 flow [2023-01-27 20:02:11,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:11,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:02:11,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:02:11,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-01-27 20:02:11,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:02:11,459 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:02:11,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:02:11,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1442779098, now seen corresponding path program 15 times [2023-01-27 20:02:11,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:02:11,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683820048] [2023-01-27 20:02:11,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:02:11,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:02:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:02:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:02:11,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:02:11,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683820048] [2023-01-27 20:02:11,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683820048] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:02:11,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692297937] [2023-01-27 20:02:11,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:02:11,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:02:11,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:02:11,850 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:02:11,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-27 20:02:12,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-01-27 20:02:12,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:02:12,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-27 20:02:12,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:02:12,301 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:02:12,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:02:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:02:12,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:02:12,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692297937] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:02:12,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:02:12,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-01-27 20:02:12,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423356441] [2023-01-27 20:02:12,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:02:12,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 20:02:12,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:02:12,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 20:02:12,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:02:12,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 483 [2023-01-27 20:02:12,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 560 transitions, 11681 flow. Second operand has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:12,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:02:12,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 483 [2023-01-27 20:02:12,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:02:15,185 INFO L130 PetriNetUnfolder]: 5797/11338 cut-off events. [2023-01-27 20:02:15,185 INFO L131 PetriNetUnfolder]: For 320621/320621 co-relation queries the response was YES. [2023-01-27 20:02:15,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100738 conditions, 11338 events. 5797/11338 cut-off events. For 320621/320621 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 97861 event pairs, 2165 based on Foata normal form. 5/11343 useless extension candidates. Maximal degree in co-relation 100646. Up to 7869 conditions per place. [2023-01-27 20:02:15,285 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 511 selfloop transitions, 58 changer transitions 19/588 dead transitions. [2023-01-27 20:02:15,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 588 transitions, 13125 flow [2023-01-27 20:02:15,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:02:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:02:15,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1604 transitions. [2023-01-27 20:02:15,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3320910973084886 [2023-01-27 20:02:15,287 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1604 transitions. [2023-01-27 20:02:15,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1604 transitions. [2023-01-27 20:02:15,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:02:15,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1604 transitions. [2023-01-27 20:02:15,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 160.4) internal successors, (1604), 10 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:15,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:15,290 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:15,291 INFO L175 Difference]: Start difference. First operand has 278 places, 560 transitions, 11681 flow. Second operand 10 states and 1604 transitions. [2023-01-27 20:02:15,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 588 transitions, 13125 flow [2023-01-27 20:02:17,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 588 transitions, 12974 flow, removed 9 selfloop flow, removed 10 redundant places. [2023-01-27 20:02:17,387 INFO L231 Difference]: Finished difference. Result has 271 places, 551 transitions, 11483 flow [2023-01-27 20:02:17,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11532, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11483, PETRI_PLACES=271, PETRI_TRANSITIONS=551} [2023-01-27 20:02:17,388 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 246 predicate places. [2023-01-27 20:02:17,388 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 551 transitions, 11483 flow [2023-01-27 20:02:17,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:17,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:02:17,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:02:17,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-27 20:02:17,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:02:17,593 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:02:17,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:02:17,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1271388532, now seen corresponding path program 16 times [2023-01-27 20:02:17,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:02:17,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536640253] [2023-01-27 20:02:17,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:02:17,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:02:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:02:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:02:18,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:02:18,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536640253] [2023-01-27 20:02:18,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536640253] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:02:18,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280038793] [2023-01-27 20:02:18,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:02:18,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:02:18,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:02:18,054 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:02:18,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-27 20:02:18,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:02:18,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:02:18,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 20:02:18,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:02:18,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:02:18,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 20:02:18,434 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:02:18,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:02:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:02:18,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:02:18,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280038793] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:02:18,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:02:18,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 19 [2023-01-27 20:02:18,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589458389] [2023-01-27 20:02:18,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:02:18,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 20:02:18,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:02:18,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 20:02:18,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:02:18,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 483 [2023-01-27 20:02:18,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 551 transitions, 11483 flow. Second operand has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:18,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:02:18,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 483 [2023-01-27 20:02:18,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:02:21,296 INFO L130 PetriNetUnfolder]: 5752/11268 cut-off events. [2023-01-27 20:02:21,296 INFO L131 PetriNetUnfolder]: For 314978/314978 co-relation queries the response was YES. [2023-01-27 20:02:21,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99596 conditions, 11268 events. 5752/11268 cut-off events. For 314978/314978 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 97337 event pairs, 1981 based on Foata normal form. 10/11278 useless extension candidates. Maximal degree in co-relation 99506. Up to 7865 conditions per place. [2023-01-27 20:02:21,400 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 459 selfloop transitions, 113 changer transitions 21/593 dead transitions. [2023-01-27 20:02:21,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 593 transitions, 13352 flow [2023-01-27 20:02:21,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:02:21,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:02:21,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1601 transitions. [2023-01-27 20:02:21,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33146997929606625 [2023-01-27 20:02:21,402 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1601 transitions. [2023-01-27 20:02:21,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1601 transitions. [2023-01-27 20:02:21,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:02:21,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1601 transitions. [2023-01-27 20:02:21,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 160.1) internal successors, (1601), 10 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:21,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:21,405 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:21,405 INFO L175 Difference]: Start difference. First operand has 271 places, 551 transitions, 11483 flow. Second operand 10 states and 1601 transitions. [2023-01-27 20:02:21,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 593 transitions, 13352 flow [2023-01-27 20:02:23,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 593 transitions, 13076 flow, removed 11 selfloop flow, removed 10 redundant places. [2023-01-27 20:02:23,631 INFO L231 Difference]: Finished difference. Result has 267 places, 549 transitions, 11637 flow [2023-01-27 20:02:23,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11233, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11637, PETRI_PLACES=267, PETRI_TRANSITIONS=549} [2023-01-27 20:02:23,631 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 242 predicate places. [2023-01-27 20:02:23,632 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 549 transitions, 11637 flow [2023-01-27 20:02:23,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.66666666666666) internal successors, (1868), 12 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:23,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:02:23,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:02:23,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-01-27 20:02:23,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-27 20:02:23,837 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:02:23,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:02:23,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1771610170, now seen corresponding path program 17 times [2023-01-27 20:02:23,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:02:23,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149863687] [2023-01-27 20:02:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:02:23,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:02:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:02:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:02:24,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:02:24,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149863687] [2023-01-27 20:02:24,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149863687] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:02:24,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876165339] [2023-01-27 20:02:24,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:02:24,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:02:24,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:02:24,191 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:02:24,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-27 20:02:24,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:02:24,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:02:24,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-27 20:02:24,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:02:24,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 20:02:24,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:02:24,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:02:24,596 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:02:24,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 24 [2023-01-27 20:02:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:02:24,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:02:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:02:27,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876165339] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:02:27,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:02:27,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 11] total 26 [2023-01-27 20:02:27,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338925757] [2023-01-27 20:02:27,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:02:27,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 20:02:27,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:02:27,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 20:02:27,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=598, Unknown=14, NotChecked=0, Total=756 [2023-01-27 20:02:27,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 483 [2023-01-27 20:02:27,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 549 transitions, 11637 flow. Second operand has 12 states, 12 states have (on average 141.66666666666666) internal successors, (1700), 12 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:27,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:02:27,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 483 [2023-01-27 20:02:27,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:02:31,717 INFO L130 PetriNetUnfolder]: 5756/11235 cut-off events. [2023-01-27 20:02:31,717 INFO L131 PetriNetUnfolder]: For 323262/323262 co-relation queries the response was YES. [2023-01-27 20:02:31,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99707 conditions, 11235 events. 5756/11235 cut-off events. For 323262/323262 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 96650 event pairs, 2166 based on Foata normal form. 5/11240 useless extension candidates. Maximal degree in co-relation 99616. Up to 7863 conditions per place. [2023-01-27 20:02:31,813 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 508 selfloop transitions, 123 changer transitions 12/643 dead transitions. [2023-01-27 20:02:31,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 643 transitions, 14617 flow [2023-01-27 20:02:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:02:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:02:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1898 transitions. [2023-01-27 20:02:31,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3022774327122153 [2023-01-27 20:02:31,815 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1898 transitions. [2023-01-27 20:02:31,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1898 transitions. [2023-01-27 20:02:31,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:02:31,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1898 transitions. [2023-01-27 20:02:31,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 146.0) internal successors, (1898), 13 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:31,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:31,819 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:31,819 INFO L175 Difference]: Start difference. First operand has 267 places, 549 transitions, 11637 flow. Second operand 13 states and 1898 transitions. [2023-01-27 20:02:31,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 643 transitions, 14617 flow [2023-01-27 20:02:33,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 643 transitions, 14324 flow, removed 46 selfloop flow, removed 7 redundant places. [2023-01-27 20:02:33,789 INFO L231 Difference]: Finished difference. Result has 273 places, 576 transitions, 12331 flow [2023-01-27 20:02:33,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11405, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12331, PETRI_PLACES=273, PETRI_TRANSITIONS=576} [2023-01-27 20:02:33,789 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 248 predicate places. [2023-01-27 20:02:33,789 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 576 transitions, 12331 flow [2023-01-27 20:02:33,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.66666666666666) internal successors, (1700), 12 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:33,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:02:33,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:02:33,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-01-27 20:02:33,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-27 20:02:33,995 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:02:33,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:02:33,995 INFO L85 PathProgramCache]: Analyzing trace with hash -99068368, now seen corresponding path program 18 times [2023-01-27 20:02:33,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:02:33,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566724405] [2023-01-27 20:02:33,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:02:33,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:02:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:02:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:02:34,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:02:34,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566724405] [2023-01-27 20:02:34,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566724405] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:02:34,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627025737] [2023-01-27 20:02:34,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:02:34,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:02:34,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:02:34,648 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:02:34,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-27 20:02:34,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-01-27 20:02:34,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:02:34,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:02:34,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:02:34,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2023-01-27 20:02:35,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:02:35,069 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:02:35,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2023-01-27 20:02:35,183 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:02:35,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:02:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:02:35,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:02:35,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627025737] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:02:35,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:02:35,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 22 [2023-01-27 20:02:35,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256347545] [2023-01-27 20:02:35,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:02:35,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 20:02:35,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:02:35,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 20:02:35,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:02:35,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 483 [2023-01-27 20:02:35,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 576 transitions, 12331 flow. Second operand has 13 states, 13 states have (on average 147.53846153846155) internal successors, (1918), 13 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:35,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:02:35,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 483 [2023-01-27 20:02:35,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:02:38,217 INFO L130 PetriNetUnfolder]: 5695/11129 cut-off events. [2023-01-27 20:02:38,217 INFO L131 PetriNetUnfolder]: For 319229/319229 co-relation queries the response was YES. [2023-01-27 20:02:38,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98565 conditions, 11129 events. 5695/11129 cut-off events. For 319229/319229 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 95880 event pairs, 1812 based on Foata normal form. 45/11174 useless extension candidates. Maximal degree in co-relation 98472. Up to 7869 conditions per place. [2023-01-27 20:02:38,308 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 465 selfloop transitions, 125 changer transitions 23/613 dead transitions. [2023-01-27 20:02:38,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 613 transitions, 14061 flow [2023-01-27 20:02:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:02:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:02:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1532 transitions. [2023-01-27 20:02:38,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31718426501035196 [2023-01-27 20:02:38,309 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1532 transitions. [2023-01-27 20:02:38,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1532 transitions. [2023-01-27 20:02:38,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:02:38,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1532 transitions. [2023-01-27 20:02:38,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 153.2) internal successors, (1532), 10 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:38,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:38,313 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:38,313 INFO L175 Difference]: Start difference. First operand has 273 places, 576 transitions, 12331 flow. Second operand 10 states and 1532 transitions. [2023-01-27 20:02:38,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 613 transitions, 14061 flow [2023-01-27 20:02:40,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 613 transitions, 13996 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-01-27 20:02:40,288 INFO L231 Difference]: Finished difference. Result has 277 places, 563 transitions, 12334 flow [2023-01-27 20:02:40,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12221, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12334, PETRI_PLACES=277, PETRI_TRANSITIONS=563} [2023-01-27 20:02:40,289 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 252 predicate places. [2023-01-27 20:02:40,289 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 563 transitions, 12334 flow [2023-01-27 20:02:40,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 147.53846153846155) internal successors, (1918), 13 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:40,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:02:40,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:02:40,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-27 20:02:40,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-27 20:02:40,497 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:02:40,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:02:40,497 INFO L85 PathProgramCache]: Analyzing trace with hash -349727208, now seen corresponding path program 19 times [2023-01-27 20:02:40,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:02:40,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378820103] [2023-01-27 20:02:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:02:40,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:02:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:02:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:02:41,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:02:41,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378820103] [2023-01-27 20:02:41,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378820103] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:02:41,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364426129] [2023-01-27 20:02:41,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:02:41,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:02:41,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:02:41,207 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:02:41,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-27 20:02:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:02:41,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-27 20:02:41,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:02:41,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 20:02:41,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:02:41,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:02:41,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:02:41,644 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:02:41,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2023-01-27 20:02:41,802 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:02:41,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-01-27 20:02:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:02:41,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:02:42,978 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:02:42,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 125 [2023-01-27 20:02:42,992 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:02:42,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2042 treesize of output 1810 [2023-01-27 20:02:43,048 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:02:43,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 978 treesize of output 918 [2023-01-27 20:02:43,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:02:43,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 869 treesize of output 773 [2023-01-27 20:02:48,716 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:02:48,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 30 [2023-01-27 20:02:48,727 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:02:48,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 57 [2023-01-27 20:02:48,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:02:48,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-01-27 20:02:48,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:02:48,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 30 [2023-01-27 20:02:48,776 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:02:48,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 57 [2023-01-27 20:02:48,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:02:48,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-01-27 20:02:48,812 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-01-27 20:02:48,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 1 [2023-01-27 20:02:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:02:53,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364426129] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:02:53,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:02:53,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 36 [2023-01-27 20:02:53,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661714872] [2023-01-27 20:02:53,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:02:53,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-27 20:02:53,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:02:53,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-27 20:02:53,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1202, Unknown=26, NotChecked=0, Total=1406 [2023-01-27 20:02:53,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 483 [2023-01-27 20:02:53,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 563 transitions, 12334 flow. Second operand has 38 states, 38 states have (on average 129.5) internal successors, (4921), 38 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:53,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:02:53,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 483 [2023-01-27 20:02:53,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:02:57,712 INFO L130 PetriNetUnfolder]: 5562/10870 cut-off events. [2023-01-27 20:02:57,712 INFO L131 PetriNetUnfolder]: For 314747/314747 co-relation queries the response was YES. [2023-01-27 20:02:57,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96749 conditions, 10870 events. 5562/10870 cut-off events. For 314747/314747 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 93128 event pairs, 1247 based on Foata normal form. 65/10935 useless extension candidates. Maximal degree in co-relation 96654. Up to 4535 conditions per place. [2023-01-27 20:02:57,816 INFO L137 encePairwiseOnDemand]: 468/483 looper letters, 412 selfloop transitions, 244 changer transitions 33/689 dead transitions. [2023-01-27 20:02:57,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 689 transitions, 15650 flow [2023-01-27 20:02:57,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 20:02:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 20:02:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2547 transitions. [2023-01-27 20:02:57,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27754168028767573 [2023-01-27 20:02:57,819 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2547 transitions. [2023-01-27 20:02:57,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2547 transitions. [2023-01-27 20:02:57,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:02:57,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2547 transitions. [2023-01-27 20:02:57,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 134.05263157894737) internal successors, (2547), 19 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:57,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:57,825 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:57,825 INFO L175 Difference]: Start difference. First operand has 277 places, 563 transitions, 12334 flow. Second operand 19 states and 2547 transitions. [2023-01-27 20:02:57,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 689 transitions, 15650 flow [2023-01-27 20:02:59,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 689 transitions, 15396 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-01-27 20:02:59,808 INFO L231 Difference]: Finished difference. Result has 286 places, 577 transitions, 13105 flow [2023-01-27 20:02:59,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11819, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13105, PETRI_PLACES=286, PETRI_TRANSITIONS=577} [2023-01-27 20:02:59,817 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 261 predicate places. [2023-01-27 20:02:59,817 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 577 transitions, 13105 flow [2023-01-27 20:02:59,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 129.5) internal successors, (4921), 38 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:02:59,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:02:59,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:02:59,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-01-27 20:03:00,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-27 20:03:00,022 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:03:00,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:03:00,023 INFO L85 PathProgramCache]: Analyzing trace with hash 904650408, now seen corresponding path program 20 times [2023-01-27 20:03:00,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:03:00,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947087717] [2023-01-27 20:03:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:03:00,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:03:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:03:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:03:00,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:03:00,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947087717] [2023-01-27 20:03:00,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947087717] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:03:00,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903222278] [2023-01-27 20:03:00,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:03:00,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:03:00,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:03:00,429 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:03:00,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-27 20:03:00,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 20:03:00,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:03:00,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-27 20:03:00,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:03:00,785 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:03:00,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 24 [2023-01-27 20:03:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:03:00,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:03:00,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903222278] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:03:00,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:03:00,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 15 [2023-01-27 20:03:00,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974979275] [2023-01-27 20:03:00,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:03:00,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:03:00,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:03:00,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:03:00,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-01-27 20:03:00,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 483 [2023-01-27 20:03:00,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 577 transitions, 13105 flow. Second operand has 11 states, 11 states have (on average 159.8181818181818) internal successors, (1758), 11 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:00,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:03:00,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 483 [2023-01-27 20:03:00,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:03:03,585 INFO L130 PetriNetUnfolder]: 5508/10701 cut-off events. [2023-01-27 20:03:03,586 INFO L131 PetriNetUnfolder]: For 321076/321076 co-relation queries the response was YES. [2023-01-27 20:03:03,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97511 conditions, 10701 events. 5508/10701 cut-off events. For 321076/321076 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 90737 event pairs, 1870 based on Foata normal form. 5/10706 useless extension candidates. Maximal degree in co-relation 97416. Up to 7964 conditions per place. [2023-01-27 20:03:03,696 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 524 selfloop transitions, 72 changer transitions 7/603 dead transitions. [2023-01-27 20:03:03,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 603 transitions, 14583 flow [2023-01-27 20:03:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:03:03,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:03:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1484 transitions. [2023-01-27 20:03:03,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3413848631239936 [2023-01-27 20:03:03,713 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1484 transitions. [2023-01-27 20:03:03,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1484 transitions. [2023-01-27 20:03:03,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:03:03,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1484 transitions. [2023-01-27 20:03:03,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 164.88888888888889) internal successors, (1484), 9 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:03,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:03,716 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:03,716 INFO L175 Difference]: Start difference. First operand has 286 places, 577 transitions, 13105 flow. Second operand 9 states and 1484 transitions. [2023-01-27 20:03:03,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 603 transitions, 14583 flow [2023-01-27 20:03:05,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 603 transitions, 14229 flow, removed 42 selfloop flow, removed 15 redundant places. [2023-01-27 20:03:05,697 INFO L231 Difference]: Finished difference. Result has 275 places, 576 transitions, 12907 flow [2023-01-27 20:03:05,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12765, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12907, PETRI_PLACES=275, PETRI_TRANSITIONS=576} [2023-01-27 20:03:05,697 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 250 predicate places. [2023-01-27 20:03:05,697 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 576 transitions, 12907 flow [2023-01-27 20:03:05,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 159.8181818181818) internal successors, (1758), 11 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:05,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:03:05,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:03:05,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-01-27 20:03:05,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:03:05,903 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:03:05,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:03:05,904 INFO L85 PathProgramCache]: Analyzing trace with hash 642364352, now seen corresponding path program 1 times [2023-01-27 20:03:05,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:03:05,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904398521] [2023-01-27 20:03:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:03:05,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:03:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:03:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:03:06,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:03:06,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904398521] [2023-01-27 20:03:06,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904398521] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:03:06,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040792987] [2023-01-27 20:03:06,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:03:06,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:03:06,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:03:06,096 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:03:06,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-27 20:03:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:03:06,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 46 conjunts are in the unsatisfiable core [2023-01-27 20:03:06,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:03:06,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:03:06,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:03:06,266 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-01-27 20:03:06,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-01-27 20:03:06,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 20:03:06,323 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:03:06,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-27 20:03:06,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 20:03:06,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:03:06,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:03:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:03:06,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:03:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:03:06,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040792987] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:03:06,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:03:06,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 11] total 23 [2023-01-27 20:03:06,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833893905] [2023-01-27 20:03:06,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:03:06,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 20:03:06,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:03:06,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 20:03:06,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:03:06,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 483 [2023-01-27 20:03:06,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 576 transitions, 12907 flow. Second operand has 6 states, 6 states have (on average 180.5) internal successors, (1083), 6 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:06,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:03:06,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 483 [2023-01-27 20:03:06,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:03:09,303 INFO L130 PetriNetUnfolder]: 5504/10718 cut-off events. [2023-01-27 20:03:09,303 INFO L131 PetriNetUnfolder]: For 319308/319308 co-relation queries the response was YES. [2023-01-27 20:03:09,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96891 conditions, 10718 events. 5504/10718 cut-off events. For 319308/319308 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 90926 event pairs, 2113 based on Foata normal form. 20/10738 useless extension candidates. Maximal degree in co-relation 96799. Up to 9354 conditions per place. [2023-01-27 20:03:09,389 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 593 selfloop transitions, 41 changer transitions 2/636 dead transitions. [2023-01-27 20:03:09,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 636 transitions, 15320 flow [2023-01-27 20:03:09,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 20:03:09,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 20:03:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1122 transitions. [2023-01-27 20:03:09,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38716356107660455 [2023-01-27 20:03:09,391 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1122 transitions. [2023-01-27 20:03:09,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1122 transitions. [2023-01-27 20:03:09,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:03:09,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1122 transitions. [2023-01-27 20:03:09,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:09,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:09,393 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:09,393 INFO L175 Difference]: Start difference. First operand has 275 places, 576 transitions, 12907 flow. Second operand 6 states and 1122 transitions. [2023-01-27 20:03:09,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 636 transitions, 15320 flow [2023-01-27 20:03:11,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 636 transitions, 14777 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-01-27 20:03:11,107 INFO L231 Difference]: Finished difference. Result has 267 places, 588 transitions, 12880 flow [2023-01-27 20:03:11,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12397, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12880, PETRI_PLACES=267, PETRI_TRANSITIONS=588} [2023-01-27 20:03:11,108 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 242 predicate places. [2023-01-27 20:03:11,108 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 588 transitions, 12880 flow [2023-01-27 20:03:11,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 180.5) internal successors, (1083), 6 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:11,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:03:11,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:03:11,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-01-27 20:03:11,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-01-27 20:03:11,313 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:03:11,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:03:11,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2101077848, now seen corresponding path program 2 times [2023-01-27 20:03:11,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:03:11,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930744253] [2023-01-27 20:03:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:03:11,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:03:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:03:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:03:11,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:03:11,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930744253] [2023-01-27 20:03:11,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930744253] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:03:11,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:03:11,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-27 20:03:11,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364618626] [2023-01-27 20:03:11,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:03:11,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:03:11,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:03:11,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:03:11,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:03:11,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 483 [2023-01-27 20:03:11,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 588 transitions, 12880 flow. Second operand has 9 states, 9 states have (on average 173.33333333333334) internal successors, (1560), 9 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:11,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:03:11,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 483 [2023-01-27 20:03:11,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:03:14,126 INFO L130 PetriNetUnfolder]: 5576/10846 cut-off events. [2023-01-27 20:03:14,126 INFO L131 PetriNetUnfolder]: For 315481/315481 co-relation queries the response was YES. [2023-01-27 20:03:14,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97298 conditions, 10846 events. 5576/10846 cut-off events. For 315481/315481 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 92192 event pairs, 1987 based on Foata normal form. 56/10902 useless extension candidates. Maximal degree in co-relation 97204. Up to 8036 conditions per place. [2023-01-27 20:03:14,215 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 543 selfloop transitions, 74 changer transitions 1/618 dead transitions. [2023-01-27 20:03:14,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 618 transitions, 14649 flow [2023-01-27 20:03:14,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 20:03:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 20:03:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1252 transitions. [2023-01-27 20:03:14,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37030464359656906 [2023-01-27 20:03:14,217 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1252 transitions. [2023-01-27 20:03:14,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1252 transitions. [2023-01-27 20:03:14,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:03:14,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1252 transitions. [2023-01-27 20:03:14,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.85714285714286) internal successors, (1252), 7 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:14,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:14,219 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:14,219 INFO L175 Difference]: Start difference. First operand has 267 places, 588 transitions, 12880 flow. Second operand 7 states and 1252 transitions. [2023-01-27 20:03:14,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 618 transitions, 14649 flow [2023-01-27 20:03:15,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 618 transitions, 14599 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-01-27 20:03:15,808 INFO L231 Difference]: Finished difference. Result has 273 places, 594 transitions, 13179 flow [2023-01-27 20:03:15,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12835, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13179, PETRI_PLACES=273, PETRI_TRANSITIONS=594} [2023-01-27 20:03:15,808 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 248 predicate places. [2023-01-27 20:03:15,808 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 594 transitions, 13179 flow [2023-01-27 20:03:15,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 173.33333333333334) internal successors, (1560), 9 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:15,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:03:15,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:03:15,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-01-27 20:03:15,809 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:03:15,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:03:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2001726862, now seen corresponding path program 3 times [2023-01-27 20:03:15,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:03:15,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558279869] [2023-01-27 20:03:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:03:15,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:03:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:03:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:03:15,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:03:15,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558279869] [2023-01-27 20:03:15,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558279869] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:03:15,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:03:15,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-27 20:03:16,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386424347] [2023-01-27 20:03:16,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:03:16,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:03:16,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:03:16,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:03:16,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:03:16,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 483 [2023-01-27 20:03:16,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 594 transitions, 13179 flow. Second operand has 9 states, 9 states have (on average 173.33333333333334) internal successors, (1560), 9 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:16,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:03:16,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 483 [2023-01-27 20:03:16,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:03:18,365 INFO L130 PetriNetUnfolder]: 5247/10141 cut-off events. [2023-01-27 20:03:18,366 INFO L131 PetriNetUnfolder]: For 311998/311998 co-relation queries the response was YES. [2023-01-27 20:03:18,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92613 conditions, 10141 events. 5247/10141 cut-off events. For 311998/311998 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 84309 event pairs, 1985 based on Foata normal form. 56/10197 useless extension candidates. Maximal degree in co-relation 92518. Up to 8040 conditions per place. [2023-01-27 20:03:18,465 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 495 selfloop transitions, 87 changer transitions 0/582 dead transitions. [2023-01-27 20:03:18,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 582 transitions, 13962 flow [2023-01-27 20:03:18,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 20:03:18,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 20:03:18,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1252 transitions. [2023-01-27 20:03:18,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37030464359656906 [2023-01-27 20:03:18,466 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1252 transitions. [2023-01-27 20:03:18,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1252 transitions. [2023-01-27 20:03:18,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:03:18,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1252 transitions. [2023-01-27 20:03:18,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.85714285714286) internal successors, (1252), 7 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:18,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:18,469 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:18,469 INFO L175 Difference]: Start difference. First operand has 273 places, 594 transitions, 13179 flow. Second operand 7 states and 1252 transitions. [2023-01-27 20:03:18,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 582 transitions, 13962 flow [2023-01-27 20:03:20,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 582 transitions, 13810 flow, removed 35 selfloop flow, removed 9 redundant places. [2023-01-27 20:03:20,152 INFO L231 Difference]: Finished difference. Result has 264 places, 563 transitions, 12633 flow [2023-01-27 20:03:20,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12417, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12633, PETRI_PLACES=264, PETRI_TRANSITIONS=563} [2023-01-27 20:03:20,152 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 239 predicate places. [2023-01-27 20:03:20,152 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 563 transitions, 12633 flow [2023-01-27 20:03:20,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 173.33333333333334) internal successors, (1560), 9 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:20,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:03:20,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:03:20,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-01-27 20:03:20,153 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:03:20,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:03:20,153 INFO L85 PathProgramCache]: Analyzing trace with hash 150263440, now seen corresponding path program 4 times [2023-01-27 20:03:20,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:03:20,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42365065] [2023-01-27 20:03:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:03:20,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:03:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:03:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:03:20,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:03:20,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42365065] [2023-01-27 20:03:20,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42365065] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:03:20,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967239433] [2023-01-27 20:03:20,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:03:20,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:03:20,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:03:20,360 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:03:20,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-27 20:03:20,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:03:20,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:03:20,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 20:03:20,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:03:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:03:20,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:03:20,560 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:03:20,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-01-27 20:03:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:03:20,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967239433] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:03:20,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:03:20,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2023-01-27 20:03:20,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580946451] [2023-01-27 20:03:20,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:03:20,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 20:03:20,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:03:20,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 20:03:20,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-01-27 20:03:20,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 483 [2023-01-27 20:03:20,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 563 transitions, 12633 flow. Second operand has 15 states, 15 states have (on average 173.6) internal successors, (2604), 15 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:20,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:03:20,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 483 [2023-01-27 20:03:20,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:03:23,122 INFO L130 PetriNetUnfolder]: 5289/10215 cut-off events. [2023-01-27 20:03:23,123 INFO L131 PetriNetUnfolder]: For 270388/270388 co-relation queries the response was YES. [2023-01-27 20:03:23,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91213 conditions, 10215 events. 5289/10215 cut-off events. For 270388/270388 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 84919 event pairs, 573 based on Foata normal form. 20/10235 useless extension candidates. Maximal degree in co-relation 91122. Up to 5855 conditions per place. [2023-01-27 20:03:23,330 INFO L137 encePairwiseOnDemand]: 475/483 looper letters, 354 selfloop transitions, 269 changer transitions 14/637 dead transitions. [2023-01-27 20:03:23,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 637 transitions, 15115 flow [2023-01-27 20:03:23,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 20:03:23,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 20:03:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1422 transitions. [2023-01-27 20:03:23,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36801242236024845 [2023-01-27 20:03:23,332 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1422 transitions. [2023-01-27 20:03:23,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1422 transitions. [2023-01-27 20:03:23,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:03:23,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1422 transitions. [2023-01-27 20:03:23,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 177.75) internal successors, (1422), 8 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:23,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:23,334 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:23,334 INFO L175 Difference]: Start difference. First operand has 264 places, 563 transitions, 12633 flow. Second operand 8 states and 1422 transitions. [2023-01-27 20:03:23,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 637 transitions, 15115 flow [2023-01-27 20:03:24,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 637 transitions, 15016 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 20:03:24,923 INFO L231 Difference]: Finished difference. Result has 269 places, 565 transitions, 13146 flow [2023-01-27 20:03:24,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12538, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13146, PETRI_PLACES=269, PETRI_TRANSITIONS=565} [2023-01-27 20:03:24,924 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 244 predicate places. [2023-01-27 20:03:24,924 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 565 transitions, 13146 flow [2023-01-27 20:03:24,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 173.6) internal successors, (2604), 15 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:24,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:03:24,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:03:24,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-01-27 20:03:25,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-01-27 20:03:25,129 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:03:25,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:03:25,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2119395894, now seen corresponding path program 5 times [2023-01-27 20:03:25,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:03:25,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736816697] [2023-01-27 20:03:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:03:25,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:03:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:03:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:03:25,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:03:25,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736816697] [2023-01-27 20:03:25,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736816697] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:03:25,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:03:25,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-27 20:03:25,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864514219] [2023-01-27 20:03:25,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:03:25,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:03:25,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:03:25,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:03:25,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:03:25,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 483 [2023-01-27 20:03:25,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 565 transitions, 13146 flow. Second operand has 9 states, 9 states have (on average 173.33333333333334) internal successors, (1560), 9 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:25,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:03:25,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 483 [2023-01-27 20:03:25,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:03:27,895 INFO L130 PetriNetUnfolder]: 5300/10232 cut-off events. [2023-01-27 20:03:27,895 INFO L131 PetriNetUnfolder]: For 301905/301905 co-relation queries the response was YES. [2023-01-27 20:03:27,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93275 conditions, 10232 events. 5300/10232 cut-off events. For 301905/301905 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 84959 event pairs, 1560 based on Foata normal form. 20/10252 useless extension candidates. Maximal degree in co-relation 93182. Up to 6994 conditions per place. [2023-01-27 20:03:27,981 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 316 selfloop transitions, 275 changer transitions 6/597 dead transitions. [2023-01-27 20:03:27,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 597 transitions, 14863 flow [2023-01-27 20:03:27,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 20:03:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 20:03:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1252 transitions. [2023-01-27 20:03:27,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37030464359656906 [2023-01-27 20:03:27,983 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1252 transitions. [2023-01-27 20:03:27,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1252 transitions. [2023-01-27 20:03:27,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:03:27,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1252 transitions. [2023-01-27 20:03:27,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.85714285714286) internal successors, (1252), 7 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:27,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:27,985 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:27,985 INFO L175 Difference]: Start difference. First operand has 269 places, 565 transitions, 13146 flow. Second operand 7 states and 1252 transitions. [2023-01-27 20:03:27,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 597 transitions, 14863 flow [2023-01-27 20:03:29,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 597 transitions, 14229 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-01-27 20:03:29,522 INFO L231 Difference]: Finished difference. Result has 271 places, 566 transitions, 13146 flow [2023-01-27 20:03:29,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12475, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13146, PETRI_PLACES=271, PETRI_TRANSITIONS=566} [2023-01-27 20:03:29,522 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 246 predicate places. [2023-01-27 20:03:29,523 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 566 transitions, 13146 flow [2023-01-27 20:03:29,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 173.33333333333334) internal successors, (1560), 9 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:29,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:03:29,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:03:29,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-01-27 20:03:29,523 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:03:29,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:03:29,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1912599798, now seen corresponding path program 6 times [2023-01-27 20:03:29,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:03:29,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216797368] [2023-01-27 20:03:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:03:29,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:03:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:03:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:03:29,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:03:29,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216797368] [2023-01-27 20:03:29,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216797368] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:03:29,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:03:29,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-27 20:03:29,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805737438] [2023-01-27 20:03:29,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:03:29,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:03:29,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:03:29,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:03:29,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:03:29,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 483 [2023-01-27 20:03:29,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 566 transitions, 13146 flow. Second operand has 9 states, 9 states have (on average 173.33333333333334) internal successors, (1560), 9 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:29,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:03:29,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 483 [2023-01-27 20:03:29,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:03:32,096 INFO L130 PetriNetUnfolder]: 5087/9813 cut-off events. [2023-01-27 20:03:32,096 INFO L131 PetriNetUnfolder]: For 282542/282542 co-relation queries the response was YES. [2023-01-27 20:03:32,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89527 conditions, 9813 events. 5087/9813 cut-off events. For 282542/282542 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 80709 event pairs, 1558 based on Foata normal form. 36/9849 useless extension candidates. Maximal degree in co-relation 89434. Up to 7080 conditions per place. [2023-01-27 20:03:32,177 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 276 selfloop transitions, 275 changer transitions 6/557 dead transitions. [2023-01-27 20:03:32,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 557 transitions, 13951 flow [2023-01-27 20:03:32,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 20:03:32,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 20:03:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1242 transitions. [2023-01-27 20:03:32,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2023-01-27 20:03:32,178 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1242 transitions. [2023-01-27 20:03:32,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1242 transitions. [2023-01-27 20:03:32,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:03:32,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1242 transitions. [2023-01-27 20:03:32,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 177.42857142857142) internal successors, (1242), 7 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:32,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:32,181 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:32,181 INFO L175 Difference]: Start difference. First operand has 271 places, 566 transitions, 13146 flow. Second operand 7 states and 1242 transitions. [2023-01-27 20:03:32,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 557 transitions, 13951 flow [2023-01-27 20:03:33,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 557 transitions, 13603 flow, removed 34 selfloop flow, removed 11 redundant places. [2023-01-27 20:03:33,514 INFO L231 Difference]: Finished difference. Result has 259 places, 538 transitions, 12816 flow [2023-01-27 20:03:33,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12371, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12816, PETRI_PLACES=259, PETRI_TRANSITIONS=538} [2023-01-27 20:03:33,514 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 234 predicate places. [2023-01-27 20:03:33,514 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 538 transitions, 12816 flow [2023-01-27 20:03:33,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 173.33333333333334) internal successors, (1560), 9 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:33,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:03:33,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:03:33,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-01-27 20:03:33,515 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:03:33,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:03:33,515 INFO L85 PathProgramCache]: Analyzing trace with hash 496765336, now seen corresponding path program 7 times [2023-01-27 20:03:33,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:03:33,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469996752] [2023-01-27 20:03:33,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:03:33,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:03:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:03:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:03:33,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:03:33,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469996752] [2023-01-27 20:03:33,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469996752] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:03:33,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:03:33,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-01-27 20:03:33,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303977107] [2023-01-27 20:03:33,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:03:33,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 20:03:33,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:03:33,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 20:03:33,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-01-27 20:03:33,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 483 [2023-01-27 20:03:33,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 538 transitions, 12816 flow. Second operand has 10 states, 10 states have (on average 169.1) internal successors, (1691), 10 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:33,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:03:33,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 483 [2023-01-27 20:03:33,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:03:35,941 INFO L130 PetriNetUnfolder]: 4998/9642 cut-off events. [2023-01-27 20:03:35,942 INFO L131 PetriNetUnfolder]: For 257939/257939 co-relation queries the response was YES. [2023-01-27 20:03:35,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87129 conditions, 9642 events. 4998/9642 cut-off events. For 257939/257939 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 79202 event pairs, 1860 based on Foata normal form. 20/9662 useless extension candidates. Maximal degree in co-relation 87043. Up to 8070 conditions per place. [2023-01-27 20:03:36,021 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 471 selfloop transitions, 84 changer transitions 2/557 dead transitions. [2023-01-27 20:03:36,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 557 transitions, 14160 flow [2023-01-27 20:03:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 20:03:36,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 20:03:36,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1390 transitions. [2023-01-27 20:03:36,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35973084886128365 [2023-01-27 20:03:36,022 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1390 transitions. [2023-01-27 20:03:36,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1390 transitions. [2023-01-27 20:03:36,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:03:36,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1390 transitions. [2023-01-27 20:03:36,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 173.75) internal successors, (1390), 8 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:36,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:36,025 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:36,025 INFO L175 Difference]: Start difference. First operand has 259 places, 538 transitions, 12816 flow. Second operand 8 states and 1390 transitions. [2023-01-27 20:03:36,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 557 transitions, 14160 flow [2023-01-27 20:03:37,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 557 transitions, 13534 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-01-27 20:03:37,293 INFO L231 Difference]: Finished difference. Result has 258 places, 535 transitions, 12323 flow [2023-01-27 20:03:37,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12151, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12323, PETRI_PLACES=258, PETRI_TRANSITIONS=535} [2023-01-27 20:03:37,293 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 233 predicate places. [2023-01-27 20:03:37,293 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 535 transitions, 12323 flow [2023-01-27 20:03:37,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 169.1) internal successors, (1691), 10 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:37,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:03:37,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:03:37,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-01-27 20:03:37,294 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:03:37,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:03:37,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1130417944, now seen corresponding path program 8 times [2023-01-27 20:03:37,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:03:37,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453044614] [2023-01-27 20:03:37,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:03:37,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:03:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:03:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:03:37,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:03:37,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453044614] [2023-01-27 20:03:37,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453044614] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:03:37,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:03:37,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-01-27 20:03:37,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595437588] [2023-01-27 20:03:37,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:03:37,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:03:37,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:03:37,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:03:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-01-27 20:03:37,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 483 [2023-01-27 20:03:37,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 535 transitions, 12323 flow. Second operand has 11 states, 11 states have (on average 168.9090909090909) internal successors, (1858), 11 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:37,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:03:37,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 483 [2023-01-27 20:03:37,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:03:40,080 INFO L130 PetriNetUnfolder]: 5058/9807 cut-off events. [2023-01-27 20:03:40,080 INFO L131 PetriNetUnfolder]: For 247148/247148 co-relation queries the response was YES. [2023-01-27 20:03:40,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87256 conditions, 9807 events. 5058/9807 cut-off events. For 247148/247148 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 81261 event pairs, 1827 based on Foata normal form. 30/9837 useless extension candidates. Maximal degree in co-relation 87170. Up to 8070 conditions per place. [2023-01-27 20:03:40,162 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 506 selfloop transitions, 59 changer transitions 19/584 dead transitions. [2023-01-27 20:03:40,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 584 transitions, 14154 flow [2023-01-27 20:03:40,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:03:40,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:03:40,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1737 transitions. [2023-01-27 20:03:40,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3596273291925466 [2023-01-27 20:03:40,164 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1737 transitions. [2023-01-27 20:03:40,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1737 transitions. [2023-01-27 20:03:40,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:03:40,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1737 transitions. [2023-01-27 20:03:40,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 173.7) internal successors, (1737), 10 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:40,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:40,167 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:40,167 INFO L175 Difference]: Start difference. First operand has 258 places, 535 transitions, 12323 flow. Second operand 10 states and 1737 transitions. [2023-01-27 20:03:40,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 584 transitions, 14154 flow [2023-01-27 20:03:41,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 584 transitions, 14038 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-01-27 20:03:41,497 INFO L231 Difference]: Finished difference. Result has 261 places, 526 transitions, 12123 flow [2023-01-27 20:03:41,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12207, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12123, PETRI_PLACES=261, PETRI_TRANSITIONS=526} [2023-01-27 20:03:41,497 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 236 predicate places. [2023-01-27 20:03:41,497 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 526 transitions, 12123 flow [2023-01-27 20:03:41,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 168.9090909090909) internal successors, (1858), 11 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:41,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:03:41,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:03:41,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-01-27 20:03:41,498 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:03:41,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:03:41,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1778753870, now seen corresponding path program 9 times [2023-01-27 20:03:41,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:03:41,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427927125] [2023-01-27 20:03:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:03:41,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:03:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:03:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:03:41,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:03:41,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427927125] [2023-01-27 20:03:41,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427927125] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:03:41,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675380475] [2023-01-27 20:03:41,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:03:41,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:03:41,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:03:41,803 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:03:41,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-27 20:03:41,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:03:41,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:03:41,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 20:03:41,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:03:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:03:42,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:03:42,115 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:03:42,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 20:03:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:03:42,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675380475] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:03:42,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:03:42,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2023-01-27 20:03:42,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871000808] [2023-01-27 20:03:42,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:03:42,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 20:03:42,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:03:42,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 20:03:42,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-01-27 20:03:42,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 483 [2023-01-27 20:03:42,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 526 transitions, 12123 flow. Second operand has 14 states, 14 states have (on average 173.71428571428572) internal successors, (2432), 14 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:42,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:03:42,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 483 [2023-01-27 20:03:42,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:03:44,308 INFO L130 PetriNetUnfolder]: 4903/9459 cut-off events. [2023-01-27 20:03:44,309 INFO L131 PetriNetUnfolder]: For 243593/243593 co-relation queries the response was YES. [2023-01-27 20:03:44,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84275 conditions, 9459 events. 4903/9459 cut-off events. For 243593/243593 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 77536 event pairs, 1806 based on Foata normal form. 20/9479 useless extension candidates. Maximal degree in co-relation 84189. Up to 8073 conditions per place. [2023-01-27 20:03:44,384 INFO L137 encePairwiseOnDemand]: 475/483 looper letters, 448 selfloop transitions, 87 changer transitions 5/540 dead transitions. [2023-01-27 20:03:44,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 540 transitions, 13299 flow [2023-01-27 20:03:44,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 20:03:44,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 20:03:44,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1429 transitions. [2023-01-27 20:03:44,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.369824016563147 [2023-01-27 20:03:44,385 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1429 transitions. [2023-01-27 20:03:44,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1429 transitions. [2023-01-27 20:03:44,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:03:44,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1429 transitions. [2023-01-27 20:03:44,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:44,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:44,388 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:44,388 INFO L175 Difference]: Start difference. First operand has 261 places, 526 transitions, 12123 flow. Second operand 8 states and 1429 transitions. [2023-01-27 20:03:44,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 540 transitions, 13299 flow [2023-01-27 20:03:45,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 540 transitions, 13083 flow, removed 19 selfloop flow, removed 14 redundant places. [2023-01-27 20:03:45,687 INFO L231 Difference]: Finished difference. Result has 254 places, 518 transitions, 12006 flow [2023-01-27 20:03:45,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11783, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12006, PETRI_PLACES=254, PETRI_TRANSITIONS=518} [2023-01-27 20:03:45,687 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 229 predicate places. [2023-01-27 20:03:45,688 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 518 transitions, 12006 flow [2023-01-27 20:03:45,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 173.71428571428572) internal successors, (2432), 14 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:45,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:03:45,688 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:03:45,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-01-27 20:03:45,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-01-27 20:03:45,892 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:03:45,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:03:45,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2109707449, now seen corresponding path program 2 times [2023-01-27 20:03:45,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:03:45,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746102168] [2023-01-27 20:03:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:03:45,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:03:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:03:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:03:46,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:03:46,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746102168] [2023-01-27 20:03:46,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746102168] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:03:46,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168549058] [2023-01-27 20:03:46,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:03:46,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:03:46,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:03:46,047 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:03:46,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-27 20:03:46,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:03:46,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:03:46,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-27 20:03:46,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:03:46,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:03:46,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 160 treesize of output 141 [2023-01-27 20:03:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:03:46,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:03:46,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:03:46,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 165 [2023-01-27 20:03:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:03:47,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168549058] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:03:47,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:03:47,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2023-01-27 20:03:47,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382794512] [2023-01-27 20:03:47,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:03:47,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 20:03:47,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:03:47,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 20:03:47,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2023-01-27 20:03:47,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 483 [2023-01-27 20:03:47,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 518 transitions, 12006 flow. Second operand has 27 states, 27 states have (on average 158.0) internal successors, (4266), 27 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:47,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:03:47,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 483 [2023-01-27 20:03:47,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:03:51,068 INFO L130 PetriNetUnfolder]: 5270/10157 cut-off events. [2023-01-27 20:03:51,068 INFO L131 PetriNetUnfolder]: For 266895/266895 co-relation queries the response was YES. [2023-01-27 20:03:51,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90161 conditions, 10157 events. 5270/10157 cut-off events. For 266895/266895 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 84445 event pairs, 951 based on Foata normal form. 160/10317 useless extension candidates. Maximal degree in co-relation 90078. Up to 3198 conditions per place. [2023-01-27 20:03:51,300 INFO L137 encePairwiseOnDemand]: 468/483 looper letters, 647 selfloop transitions, 625 changer transitions 69/1341 dead transitions. [2023-01-27 20:03:51,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 1341 transitions, 31087 flow [2023-01-27 20:03:51,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-01-27 20:03:51,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-01-27 20:03:51,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 7310 transitions. [2023-01-27 20:03:51,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3363239015412928 [2023-01-27 20:03:51,321 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 7310 transitions. [2023-01-27 20:03:51,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 7310 transitions. [2023-01-27 20:03:51,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:03:51,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 7310 transitions. [2023-01-27 20:03:51,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 162.44444444444446) internal successors, (7310), 45 states have internal predecessors, (7310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:51,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 483.0) internal successors, (22218), 46 states have internal predecessors, (22218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:51,351 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 483.0) internal successors, (22218), 46 states have internal predecessors, (22218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:51,351 INFO L175 Difference]: Start difference. First operand has 254 places, 518 transitions, 12006 flow. Second operand 45 states and 7310 transitions. [2023-01-27 20:03:51,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 1341 transitions, 31087 flow [2023-01-27 20:03:52,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 1341 transitions, 30709 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-01-27 20:03:52,887 INFO L231 Difference]: Finished difference. Result has 311 places, 881 transitions, 22917 flow [2023-01-27 20:03:52,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11814, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=22917, PETRI_PLACES=311, PETRI_TRANSITIONS=881} [2023-01-27 20:03:52,888 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 286 predicate places. [2023-01-27 20:03:52,888 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 881 transitions, 22917 flow [2023-01-27 20:03:52,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 158.0) internal successors, (4266), 27 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:52,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:03:52,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:03:52,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-01-27 20:03:53,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:03:53,094 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:03:53,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:03:53,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1768613792, now seen corresponding path program 10 times [2023-01-27 20:03:53,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:03:53,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443978337] [2023-01-27 20:03:53,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:03:53,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:03:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:03:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:03:53,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:03:53,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443978337] [2023-01-27 20:03:53,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443978337] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:03:53,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:03:53,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-01-27 20:03:53,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787568023] [2023-01-27 20:03:53,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:03:53,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:03:53,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:03:53,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:03:53,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-01-27 20:03:53,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 483 [2023-01-27 20:03:53,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 881 transitions, 22917 flow. Second operand has 11 states, 11 states have (on average 162.9090909090909) internal successors, (1792), 11 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:53,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:03:53,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 483 [2023-01-27 20:03:53,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:03:56,420 INFO L130 PetriNetUnfolder]: 4977/9639 cut-off events. [2023-01-27 20:03:56,420 INFO L131 PetriNetUnfolder]: For 294540/294540 co-relation queries the response was YES. [2023-01-27 20:03:56,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93729 conditions, 9639 events. 4977/9639 cut-off events. For 294540/294540 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 79902 event pairs, 1792 based on Foata normal form. 30/9669 useless extension candidates. Maximal degree in co-relation 93626. Up to 8431 conditions per place. [2023-01-27 20:03:56,514 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 768 selfloop transitions, 126 changer transitions 20/914 dead transitions. [2023-01-27 20:03:56,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 914 transitions, 25166 flow [2023-01-27 20:03:56,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:03:56,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:03:56,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1670 transitions. [2023-01-27 20:03:56,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34575569358178054 [2023-01-27 20:03:56,515 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1670 transitions. [2023-01-27 20:03:56,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1670 transitions. [2023-01-27 20:03:56,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:03:56,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1670 transitions. [2023-01-27 20:03:56,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 167.0) internal successors, (1670), 10 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:56,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:56,519 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:56,519 INFO L175 Difference]: Start difference. First operand has 311 places, 881 transitions, 22917 flow. Second operand 10 states and 1670 transitions. [2023-01-27 20:03:56,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 914 transitions, 25166 flow [2023-01-27 20:03:58,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 914 transitions, 24267 flow, removed 436 selfloop flow, removed 10 redundant places. [2023-01-27 20:03:58,837 INFO L231 Difference]: Finished difference. Result has 307 places, 874 transitions, 22163 flow [2023-01-27 20:03:58,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=22063, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=22163, PETRI_PLACES=307, PETRI_TRANSITIONS=874} [2023-01-27 20:03:58,838 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 282 predicate places. [2023-01-27 20:03:58,838 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 874 transitions, 22163 flow [2023-01-27 20:03:58,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 162.9090909090909) internal successors, (1792), 11 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:58,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:03:58,839 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:03:58,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-01-27 20:03:58,839 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:03:58,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:03:58,839 INFO L85 PathProgramCache]: Analyzing trace with hash -2075885073, now seen corresponding path program 3 times [2023-01-27 20:03:58,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:03:58,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424347088] [2023-01-27 20:03:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:03:58,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:03:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:03:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:03:59,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:03:59,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424347088] [2023-01-27 20:03:59,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424347088] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:03:59,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474843217] [2023-01-27 20:03:59,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:03:59,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:03:59,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:03:59,013 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:03:59,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-27 20:03:59,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:03:59,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:03:59,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-27 20:03:59,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:03:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:03:59,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:03:59,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:03:59,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 165 [2023-01-27 20:03:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:03:59,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474843217] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:03:59,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:03:59,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-01-27 20:03:59,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090209084] [2023-01-27 20:03:59,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:03:59,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 20:03:59,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:03:59,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 20:03:59,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2023-01-27 20:03:59,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 483 [2023-01-27 20:03:59,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 874 transitions, 22163 flow. Second operand has 29 states, 29 states have (on average 164.86206896551724) internal successors, (4781), 29 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:03:59,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:03:59,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 483 [2023-01-27 20:03:59,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:04:03,380 INFO L130 PetriNetUnfolder]: 5062/9802 cut-off events. [2023-01-27 20:04:03,380 INFO L131 PetriNetUnfolder]: For 288953/288953 co-relation queries the response was YES. [2023-01-27 20:04:03,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93164 conditions, 9802 events. 5062/9802 cut-off events. For 288953/288953 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 81199 event pairs, 1842 based on Foata normal form. 90/9892 useless extension candidates. Maximal degree in co-relation 93063. Up to 5613 conditions per place. [2023-01-27 20:04:03,469 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 1049 selfloop transitions, 139 changer transitions 20/1208 dead transitions. [2023-01-27 20:04:03,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1208 transitions, 30091 flow [2023-01-27 20:04:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 20:04:03,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 20:04:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2745 transitions. [2023-01-27 20:04:03,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35520186335403725 [2023-01-27 20:04:03,471 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2745 transitions. [2023-01-27 20:04:03,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2745 transitions. [2023-01-27 20:04:03,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:04:03,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2745 transitions. [2023-01-27 20:04:03,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 171.5625) internal successors, (2745), 16 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:03,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 483.0) internal successors, (8211), 17 states have internal predecessors, (8211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:03,476 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 483.0) internal successors, (8211), 17 states have internal predecessors, (8211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:03,476 INFO L175 Difference]: Start difference. First operand has 307 places, 874 transitions, 22163 flow. Second operand 16 states and 2745 transitions. [2023-01-27 20:04:03,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 1208 transitions, 30091 flow [2023-01-27 20:04:05,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 1208 transitions, 29225 flow, removed 40 selfloop flow, removed 17 redundant places. [2023-01-27 20:04:05,477 INFO L231 Difference]: Finished difference. Result has 307 places, 912 transitions, 22815 flow [2023-01-27 20:04:05,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=21377, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=22815, PETRI_PLACES=307, PETRI_TRANSITIONS=912} [2023-01-27 20:04:05,477 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 282 predicate places. [2023-01-27 20:04:05,478 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 912 transitions, 22815 flow [2023-01-27 20:04:05,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 164.86206896551724) internal successors, (4781), 29 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:05,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:04:05,478 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:04:05,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-01-27 20:04:05,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:04:05,683 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:04:05,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:04:05,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1698496599, now seen corresponding path program 4 times [2023-01-27 20:04:05,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:04:05,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128527338] [2023-01-27 20:04:05,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:04:05,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:04:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:04:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:04:05,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:04:05,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128527338] [2023-01-27 20:04:05,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128527338] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:04:05,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646333698] [2023-01-27 20:04:05,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:04:05,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:04:05,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:04:05,833 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:04:05,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-27 20:04:05,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:04:05,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:04:05,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-27 20:04:05,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:04:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:04:06,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:04:06,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:04:06,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 165 [2023-01-27 20:04:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:04:06,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646333698] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:04:06,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:04:06,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-01-27 20:04:06,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047963693] [2023-01-27 20:04:06,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:04:06,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 20:04:06,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:04:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 20:04:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-01-27 20:04:06,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 483 [2023-01-27 20:04:06,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 912 transitions, 22815 flow. Second operand has 25 states, 25 states have (on average 164.96) internal successors, (4124), 25 states have internal predecessors, (4124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:06,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:04:06,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 483 [2023-01-27 20:04:06,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:04:09,698 INFO L130 PetriNetUnfolder]: 4886/9586 cut-off events. [2023-01-27 20:04:09,698 INFO L131 PetriNetUnfolder]: For 293193/293193 co-relation queries the response was YES. [2023-01-27 20:04:09,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91921 conditions, 9586 events. 4886/9586 cut-off events. For 293193/293193 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 80486 event pairs, 1488 based on Foata normal form. 144/9730 useless extension candidates. Maximal degree in co-relation 91821. Up to 4124 conditions per place. [2023-01-27 20:04:09,794 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 1046 selfloop transitions, 132 changer transitions 19/1197 dead transitions. [2023-01-27 20:04:09,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1197 transitions, 30019 flow [2023-01-27 20:04:09,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 20:04:09,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 20:04:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2067 transitions. [2023-01-27 20:04:09,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35662525879917184 [2023-01-27 20:04:09,796 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2067 transitions. [2023-01-27 20:04:09,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2067 transitions. [2023-01-27 20:04:09,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:04:09,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2067 transitions. [2023-01-27 20:04:09,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 172.25) internal successors, (2067), 12 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:09,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:09,800 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:09,800 INFO L175 Difference]: Start difference. First operand has 307 places, 912 transitions, 22815 flow. Second operand 12 states and 2067 transitions. [2023-01-27 20:04:09,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1197 transitions, 30019 flow [2023-01-27 20:04:12,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1197 transitions, 29818 flow, removed 91 selfloop flow, removed 7 redundant places. [2023-01-27 20:04:12,240 INFO L231 Difference]: Finished difference. Result has 316 places, 938 transitions, 23782 flow [2023-01-27 20:04:12,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=22584, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=23782, PETRI_PLACES=316, PETRI_TRANSITIONS=938} [2023-01-27 20:04:12,241 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 291 predicate places. [2023-01-27 20:04:12,241 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 938 transitions, 23782 flow [2023-01-27 20:04:12,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 164.96) internal successors, (4124), 25 states have internal predecessors, (4124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:12,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:04:12,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:04:12,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-01-27 20:04:12,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-01-27 20:04:12,446 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:04:12,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:04:12,447 INFO L85 PathProgramCache]: Analyzing trace with hash 950430547, now seen corresponding path program 5 times [2023-01-27 20:04:12,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:04:12,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185896798] [2023-01-27 20:04:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:04:12,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:04:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:04:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:04:12,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:04:12,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185896798] [2023-01-27 20:04:12,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185896798] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:04:12,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976339623] [2023-01-27 20:04:12,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:04:12,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:04:12,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:04:12,609 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:04:12,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-27 20:04:12,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:04:12,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:04:12,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-27 20:04:12,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:04:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:04:12,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:04:13,128 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:04:13,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 165 [2023-01-27 20:04:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:04:13,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976339623] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:04:13,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:04:13,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2023-01-27 20:04:13,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061634104] [2023-01-27 20:04:13,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:04:13,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 20:04:13,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:04:13,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 20:04:13,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2023-01-27 20:04:13,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 483 [2023-01-27 20:04:13,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 938 transitions, 23782 flow. Second operand has 26 states, 26 states have (on average 164.69230769230768) internal successors, (4282), 26 states have internal predecessors, (4282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:13,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:04:13,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 483 [2023-01-27 20:04:13,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:04:16,456 INFO L130 PetriNetUnfolder]: 4729/9325 cut-off events. [2023-01-27 20:04:16,456 INFO L131 PetriNetUnfolder]: For 290224/290224 co-relation queries the response was YES. [2023-01-27 20:04:16,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90586 conditions, 9325 events. 4729/9325 cut-off events. For 290224/290224 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 78230 event pairs, 1757 based on Foata normal form. 62/9387 useless extension candidates. Maximal degree in co-relation 90482. Up to 5425 conditions per place. [2023-01-27 20:04:16,545 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 982 selfloop transitions, 132 changer transitions 17/1131 dead transitions. [2023-01-27 20:04:16,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 1131 transitions, 28912 flow [2023-01-27 20:04:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:04:16,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:04:16,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2393 transitions. [2023-01-27 20:04:16,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3538893818396924 [2023-01-27 20:04:16,547 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2393 transitions. [2023-01-27 20:04:16,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2393 transitions. [2023-01-27 20:04:16,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:04:16,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2393 transitions. [2023-01-27 20:04:16,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 170.92857142857142) internal successors, (2393), 14 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:16,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:16,552 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:16,552 INFO L175 Difference]: Start difference. First operand has 316 places, 938 transitions, 23782 flow. Second operand 14 states and 2393 transitions. [2023-01-27 20:04:16,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 1131 transitions, 28912 flow [2023-01-27 20:04:19,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1131 transitions, 28789 flow, removed 55 selfloop flow, removed 6 redundant places. [2023-01-27 20:04:19,211 INFO L231 Difference]: Finished difference. Result has 324 places, 934 transitions, 23993 flow [2023-01-27 20:04:19,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=23620, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=933, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=23993, PETRI_PLACES=324, PETRI_TRANSITIONS=934} [2023-01-27 20:04:19,212 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 299 predicate places. [2023-01-27 20:04:19,212 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 934 transitions, 23993 flow [2023-01-27 20:04:19,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 164.69230769230768) internal successors, (4282), 26 states have internal predecessors, (4282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:19,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:04:19,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:04:19,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-01-27 20:04:19,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:04:19,417 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:04:19,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:04:19,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1122305270, now seen corresponding path program 11 times [2023-01-27 20:04:19,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:04:19,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4952681] [2023-01-27 20:04:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:04:19,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:04:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:04:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:04:19,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:04:19,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4952681] [2023-01-27 20:04:19,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4952681] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:04:19,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:04:19,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-01-27 20:04:19,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698952183] [2023-01-27 20:04:19,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:04:19,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:04:19,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:04:19,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:04:19,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-01-27 20:04:19,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 483 [2023-01-27 20:04:19,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 934 transitions, 23993 flow. Second operand has 11 states, 11 states have (on average 168.9090909090909) internal successors, (1858), 11 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:19,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:04:19,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 483 [2023-01-27 20:04:19,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:04:22,720 INFO L130 PetriNetUnfolder]: 4650/9161 cut-off events. [2023-01-27 20:04:22,720 INFO L131 PetriNetUnfolder]: For 281924/281924 co-relation queries the response was YES. [2023-01-27 20:04:22,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88553 conditions, 9161 events. 4650/9161 cut-off events. For 281924/281924 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 76691 event pairs, 1779 based on Foata normal form. 30/9191 useless extension candidates. Maximal degree in co-relation 88448. Up to 8294 conditions per place. [2023-01-27 20:04:22,801 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 771 selfloop transitions, 157 changer transitions 11/939 dead transitions. [2023-01-27 20:04:22,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 939 transitions, 25784 flow [2023-01-27 20:04:22,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:04:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:04:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1551 transitions. [2023-01-27 20:04:22,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35679779158040026 [2023-01-27 20:04:22,802 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1551 transitions. [2023-01-27 20:04:22,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1551 transitions. [2023-01-27 20:04:22,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:04:22,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1551 transitions. [2023-01-27 20:04:22,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 172.33333333333334) internal successors, (1551), 9 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:22,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:22,805 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:22,805 INFO L175 Difference]: Start difference. First operand has 324 places, 934 transitions, 23993 flow. Second operand 9 states and 1551 transitions. [2023-01-27 20:04:22,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 939 transitions, 25784 flow [2023-01-27 20:04:24,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 939 transitions, 25747 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-01-27 20:04:24,872 INFO L231 Difference]: Finished difference. Result has 324 places, 912 transitions, 23837 flow [2023-01-27 20:04:24,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=23634, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23837, PETRI_PLACES=324, PETRI_TRANSITIONS=912} [2023-01-27 20:04:24,873 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 299 predicate places. [2023-01-27 20:04:24,873 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 912 transitions, 23837 flow [2023-01-27 20:04:24,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 168.9090909090909) internal successors, (1858), 11 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:24,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:04:24,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:04:24,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-01-27 20:04:24,874 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:04:24,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:04:24,874 INFO L85 PathProgramCache]: Analyzing trace with hash -858824887, now seen corresponding path program 6 times [2023-01-27 20:04:24,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:04:24,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149703402] [2023-01-27 20:04:24,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:04:24,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:04:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:04:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:04:24,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:04:24,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149703402] [2023-01-27 20:04:24,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149703402] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:04:24,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366507947] [2023-01-27 20:04:24,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:04:24,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:04:24,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:04:24,994 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:04:24,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-27 20:04:25,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 20:04:25,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:04:25,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 20:04:25,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:04:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:04:25,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:04:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:04:25,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366507947] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:04:25,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:04:25,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-01-27 20:04:25,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914328390] [2023-01-27 20:04:25,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:04:25,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 20:04:25,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:04:25,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 20:04:25,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:04:25,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 483 [2023-01-27 20:04:25,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 912 transitions, 23837 flow. Second operand has 22 states, 22 states have (on average 171.86363636363637) internal successors, (3781), 22 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:25,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:04:25,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 483 [2023-01-27 20:04:25,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:04:28,563 INFO L130 PetriNetUnfolder]: 4617/9057 cut-off events. [2023-01-27 20:04:28,563 INFO L131 PetriNetUnfolder]: For 284913/284913 co-relation queries the response was YES. [2023-01-27 20:04:28,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88462 conditions, 9057 events. 4617/9057 cut-off events. For 284913/284913 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 74981 event pairs, 935 based on Foata normal form. 13/9070 useless extension candidates. Maximal degree in co-relation 88357. Up to 3298 conditions per place. [2023-01-27 20:04:28,647 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 904 selfloop transitions, 192 changer transitions 14/1110 dead transitions. [2023-01-27 20:04:28,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 1110 transitions, 29337 flow [2023-01-27 20:04:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:04:28,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:04:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2499 transitions. [2023-01-27 20:04:28,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2023-01-27 20:04:28,649 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2499 transitions. [2023-01-27 20:04:28,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2499 transitions. [2023-01-27 20:04:28,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:04:28,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2499 transitions. [2023-01-27 20:04:28,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 178.5) internal successors, (2499), 14 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:28,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:28,654 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:28,654 INFO L175 Difference]: Start difference. First operand has 324 places, 912 transitions, 23837 flow. Second operand 14 states and 2499 transitions. [2023-01-27 20:04:28,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 1110 transitions, 29337 flow [2023-01-27 20:04:30,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 1110 transitions, 28782 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-01-27 20:04:30,585 INFO L231 Difference]: Finished difference. Result has 317 places, 913 transitions, 23823 flow [2023-01-27 20:04:30,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=23301, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=23823, PETRI_PLACES=317, PETRI_TRANSITIONS=913} [2023-01-27 20:04:30,586 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 292 predicate places. [2023-01-27 20:04:30,586 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 913 transitions, 23823 flow [2023-01-27 20:04:30,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 171.86363636363637) internal successors, (3781), 22 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:30,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:04:30,586 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:04:30,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-01-27 20:04:30,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-01-27 20:04:30,792 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:04:30,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:04:30,792 INFO L85 PathProgramCache]: Analyzing trace with hash -921077659, now seen corresponding path program 1 times [2023-01-27 20:04:30,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:04:30,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423747236] [2023-01-27 20:04:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:04:30,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:04:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:04:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:04:30,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:04:30,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423747236] [2023-01-27 20:04:30,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423747236] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:04:30,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132447549] [2023-01-27 20:04:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:04:30,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:04:30,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:04:30,863 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:04:30,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-27 20:04:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:04:31,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 20:04:31,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:04:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:04:31,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:04:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:04:31,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132447549] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:04:31,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:04:31,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-01-27 20:04:31,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792099040] [2023-01-27 20:04:31,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:04:31,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 20:04:31,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:04:31,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 20:04:31,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-01-27 20:04:31,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 483 [2023-01-27 20:04:31,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 913 transitions, 23823 flow. Second operand has 16 states, 16 states have (on average 173.1875) internal successors, (2771), 16 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:31,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:04:31,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 483 [2023-01-27 20:04:31,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:04:32,533 INFO L130 PetriNetUnfolder]: 1707/3387 cut-off events. [2023-01-27 20:04:32,533 INFO L131 PetriNetUnfolder]: For 122695/122695 co-relation queries the response was YES. [2023-01-27 20:04:32,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35548 conditions, 3387 events. 1707/3387 cut-off events. For 122695/122695 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 23374 event pairs, 502 based on Foata normal form. 126/3513 useless extension candidates. Maximal degree in co-relation 35443. Up to 1911 conditions per place. [2023-01-27 20:04:32,567 INFO L137 encePairwiseOnDemand]: 475/483 looper letters, 317 selfloop transitions, 6 changer transitions 261/584 dead transitions. [2023-01-27 20:04:32,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 584 transitions, 15219 flow [2023-01-27 20:04:32,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 20:04:32,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 20:04:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3005 transitions. [2023-01-27 20:04:32,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3659724759469005 [2023-01-27 20:04:32,570 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3005 transitions. [2023-01-27 20:04:32,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3005 transitions. [2023-01-27 20:04:32,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:04:32,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3005 transitions. [2023-01-27 20:04:32,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 176.76470588235293) internal successors, (3005), 17 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:32,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 483.0) internal successors, (8694), 18 states have internal predecessors, (8694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:32,575 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 483.0) internal successors, (8694), 18 states have internal predecessors, (8694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:32,575 INFO L175 Difference]: Start difference. First operand has 317 places, 913 transitions, 23823 flow. Second operand 17 states and 3005 transitions. [2023-01-27 20:04:32,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 584 transitions, 15219 flow [2023-01-27 20:04:33,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 584 transitions, 14462 flow, removed 77 selfloop flow, removed 21 redundant places. [2023-01-27 20:04:33,198 INFO L231 Difference]: Finished difference. Result has 310 places, 323 transitions, 6985 flow [2023-01-27 20:04:33,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11784, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6985, PETRI_PLACES=310, PETRI_TRANSITIONS=323} [2023-01-27 20:04:33,199 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 285 predicate places. [2023-01-27 20:04:33,199 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 323 transitions, 6985 flow [2023-01-27 20:04:33,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 173.1875) internal successors, (2771), 16 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:33,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:04:33,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:04:33,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-01-27 20:04:33,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:04:33,400 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:04:33,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:04:33,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1369840006, now seen corresponding path program 7 times [2023-01-27 20:04:33,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:04:33,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300487304] [2023-01-27 20:04:33,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:04:33,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:04:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:04:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:04:34,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:04:34,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300487304] [2023-01-27 20:04:34,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300487304] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:04:34,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213485863] [2023-01-27 20:04:34,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:04:34,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:04:34,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:04:34,145 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:04:34,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-27 20:04:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:04:34,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-27 20:04:34,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:04:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:04:34,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:04:35,015 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:04:35,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:04:35,051 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-01-27 20:04:35,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 62 [2023-01-27 20:04:35,096 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:04:35,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 4 [2023-01-27 20:04:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:04:35,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213485863] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:04:35,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:04:35,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 39 [2023-01-27 20:04:35,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240793089] [2023-01-27 20:04:35,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:04:35,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-27 20:04:35,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:04:35,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-27 20:04:35,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1275, Unknown=0, NotChecked=0, Total=1560 [2023-01-27 20:04:35,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 483 [2023-01-27 20:04:35,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 323 transitions, 6985 flow. Second operand has 40 states, 40 states have (on average 146.55) internal successors, (5862), 40 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:35,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:04:35,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 483 [2023-01-27 20:04:35,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:04:37,613 INFO L130 PetriNetUnfolder]: 2935/5183 cut-off events. [2023-01-27 20:04:37,613 INFO L131 PetriNetUnfolder]: For 161325/161325 co-relation queries the response was YES. [2023-01-27 20:04:37,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51123 conditions, 5183 events. 2935/5183 cut-off events. For 161325/161325 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 34504 event pairs, 296 based on Foata normal form. 136/5319 useless extension candidates. Maximal degree in co-relation 51024. Up to 1637 conditions per place. [2023-01-27 20:04:37,671 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 652 selfloop transitions, 279 changer transitions 0/931 dead transitions. [2023-01-27 20:04:37,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 931 transitions, 20925 flow [2023-01-27 20:04:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-27 20:04:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-27 20:04:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3814 transitions. [2023-01-27 20:04:37,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3158592132505176 [2023-01-27 20:04:37,674 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3814 transitions. [2023-01-27 20:04:37,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3814 transitions. [2023-01-27 20:04:37,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:04:37,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3814 transitions. [2023-01-27 20:04:37,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 152.56) internal successors, (3814), 25 states have internal predecessors, (3814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:37,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 483.0) internal successors, (12558), 26 states have internal predecessors, (12558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:37,682 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 483.0) internal successors, (12558), 26 states have internal predecessors, (12558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:37,683 INFO L175 Difference]: Start difference. First operand has 310 places, 323 transitions, 6985 flow. Second operand 25 states and 3814 transitions. [2023-01-27 20:04:37,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 931 transitions, 20925 flow [2023-01-27 20:04:38,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 931 transitions, 19688 flow, removed 416 selfloop flow, removed 46 redundant places. [2023-01-27 20:04:38,438 INFO L231 Difference]: Finished difference. Result has 241 places, 501 transitions, 11468 flow [2023-01-27 20:04:38,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=6561, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11468, PETRI_PLACES=241, PETRI_TRANSITIONS=501} [2023-01-27 20:04:38,439 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 216 predicate places. [2023-01-27 20:04:38,439 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 501 transitions, 11468 flow [2023-01-27 20:04:38,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 146.55) internal successors, (5862), 40 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:38,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:04:38,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:04:38,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-01-27 20:04:38,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-01-27 20:04:38,645 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:04:38,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:04:38,645 INFO L85 PathProgramCache]: Analyzing trace with hash 10466820, now seen corresponding path program 8 times [2023-01-27 20:04:38,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:04:38,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932394221] [2023-01-27 20:04:38,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:04:38,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:04:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:04:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:04:39,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:04:39,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932394221] [2023-01-27 20:04:39,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932394221] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:04:39,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407092792] [2023-01-27 20:04:39,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:04:39,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:04:39,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:04:39,101 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:04:39,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-27 20:04:39,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:04:39,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:04:39,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-27 20:04:39,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:04:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:04:39,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:04:39,848 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:04:39,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:04:39,883 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-01-27 20:04:39,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 62 [2023-01-27 20:04:39,901 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:04:39,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 4 [2023-01-27 20:04:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:04:40,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407092792] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:04:40,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:04:40,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 39 [2023-01-27 20:04:40,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785240277] [2023-01-27 20:04:40,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:04:40,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-27 20:04:40,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:04:40,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-27 20:04:40,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2023-01-27 20:04:40,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 483 [2023-01-27 20:04:40,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 501 transitions, 11468 flow. Second operand has 40 states, 40 states have (on average 146.55) internal successors, (5862), 40 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:40,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:04:40,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 483 [2023-01-27 20:04:40,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:04:42,900 INFO L130 PetriNetUnfolder]: 3063/5419 cut-off events. [2023-01-27 20:04:42,901 INFO L131 PetriNetUnfolder]: For 126918/126918 co-relation queries the response was YES. [2023-01-27 20:04:42,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50204 conditions, 5419 events. 3063/5419 cut-off events. For 126918/126918 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 36548 event pairs, 457 based on Foata normal form. 52/5471 useless extension candidates. Maximal degree in co-relation 50126. Up to 1677 conditions per place. [2023-01-27 20:04:42,952 INFO L137 encePairwiseOnDemand]: 469/483 looper letters, 541 selfloop transitions, 397 changer transitions 0/938 dead transitions. [2023-01-27 20:04:42,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 938 transitions, 21845 flow [2023-01-27 20:04:42,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-27 20:04:42,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-27 20:04:42,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5263 transitions. [2023-01-27 20:04:42,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31132800946465544 [2023-01-27 20:04:42,956 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5263 transitions. [2023-01-27 20:04:42,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5263 transitions. [2023-01-27 20:04:42,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:04:42,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5263 transitions. [2023-01-27 20:04:42,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 150.37142857142857) internal successors, (5263), 35 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:42,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 483.0) internal successors, (17388), 36 states have internal predecessors, (17388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:42,966 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 483.0) internal successors, (17388), 36 states have internal predecessors, (17388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:42,966 INFO L175 Difference]: Start difference. First operand has 241 places, 501 transitions, 11468 flow. Second operand 35 states and 5263 transitions. [2023-01-27 20:04:42,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 938 transitions, 21845 flow [2023-01-27 20:04:43,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 938 transitions, 21685 flow, removed 72 selfloop flow, removed 6 redundant places. [2023-01-27 20:04:43,580 INFO L231 Difference]: Finished difference. Result has 282 places, 659 transitions, 15971 flow [2023-01-27 20:04:43,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11376, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=15971, PETRI_PLACES=282, PETRI_TRANSITIONS=659} [2023-01-27 20:04:43,580 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 257 predicate places. [2023-01-27 20:04:43,580 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 659 transitions, 15971 flow [2023-01-27 20:04:43,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 146.55) internal successors, (5862), 40 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:43,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:04:43,581 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:04:43,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-01-27 20:04:43,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-01-27 20:04:43,783 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:04:43,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:04:43,783 INFO L85 PathProgramCache]: Analyzing trace with hash -779428774, now seen corresponding path program 9 times [2023-01-27 20:04:43,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:04:43,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835849619] [2023-01-27 20:04:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:04:43,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:04:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:04:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:04:44,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:04:44,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835849619] [2023-01-27 20:04:44,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835849619] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:04:44,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250526650] [2023-01-27 20:04:44,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:04:44,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:04:44,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:04:44,326 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:04:44,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-27 20:04:44,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 20:04:44,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:04:44,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 59 conjunts are in the unsatisfiable core [2023-01-27 20:04:44,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:04:44,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-01-27 20:04:44,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:04:44,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:04:45,142 INFO L321 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2023-01-27 20:04:45,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 154 [2023-01-27 20:04:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:04:45,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:04:46,069 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (+ c_~a1~0.offset 4)) (.cse7 (+ 4 c_~a2~0.offset))) (let ((.cse0 (forall ((~a1~0.base Int) (v_ArrVal_2194 (Array Int Int))) (not (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2194))) (= (select (select .cse9 ~a1~0.base) .cse6) (select (select .cse9 c_~a2~0.base) .cse7))))))) (and (or (<= c_~n2~0 c_~n1~0) .cse0) (or (<= c_~n1~0 c_~n2~0) .cse0) (forall ((~a1~0.base Int) (v_ArrVal_2194 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2194))) (let ((.cse3 (select .cse8 ~a1~0.base)) (.cse5 (select .cse8 c_~a2~0.base))) (or (forall ((|v_thread2Thread1of1ForFork1_~i~1#1_148| Int)) (let ((.cse4 (* |v_thread2Thread1of1ForFork1_~i~1#1_148| 4))) (let ((.cse2 (select .cse5 (+ .cse4 c_~a2~0.offset))) (.cse1 (select .cse3 (+ .cse4 c_~a1~0.offset)))) (or (= .cse1 .cse2) (<= c_~n1~0 |v_thread2Thread1of1ForFork1_~i~1#1_148|) (< (+ 2147483647 .cse1) .cse2) (<= c_~n2~0 |v_thread2Thread1of1ForFork1_~i~1#1_148|) (< |v_thread2Thread1of1ForFork1_~i~1#1_148| 1) (< (+ 2147483648 .cse2) .cse1))))) (not (= (select .cse3 .cse6) (select .cse5 .cse7)))))))))) is different from false [2023-01-27 20:04:46,255 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:04:46,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 138 [2023-01-27 20:04:46,291 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-01-27 20:04:46,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1638 treesize of output 1442 [2023-01-27 20:04:46,314 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:04:46,315 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:04:46,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:04:46,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1398 treesize of output 1090 [2023-01-27 20:04:46,358 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:04:46,359 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:04:46,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:04:46,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1046 treesize of output 914 [2023-01-27 20:04:49,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:04:49,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 41 [2023-01-27 20:04:49,173 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:04:49,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 726 treesize of output 642 [2023-01-27 20:04:49,192 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:04:49,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 255 [2023-01-27 20:04:49,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:04:49,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-01-27 20:04:49,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:04:49,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 41 [2023-01-27 20:04:49,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:04:49,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 726 treesize of output 642 [2023-01-27 20:04:49,370 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:04:49,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 255 [2023-01-27 20:04:49,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:04:49,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-01-27 20:04:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:04:49,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250526650] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:04:49,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:04:49,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 43 [2023-01-27 20:04:49,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261222358] [2023-01-27 20:04:49,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:04:49,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-27 20:04:49,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:04:49,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-27 20:04:49,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1600, Unknown=1, NotChecked=82, Total=1892 [2023-01-27 20:04:49,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 483 [2023-01-27 20:04:49,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 659 transitions, 15971 flow. Second operand has 44 states, 44 states have (on average 131.52272727272728) internal successors, (5787), 44 states have internal predecessors, (5787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:49,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:04:49,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 483 [2023-01-27 20:04:49,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:04:59,687 INFO L130 PetriNetUnfolder]: 5545/9772 cut-off events. [2023-01-27 20:04:59,687 INFO L131 PetriNetUnfolder]: For 276771/276771 co-relation queries the response was YES. [2023-01-27 20:04:59,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95920 conditions, 9772 events. 5545/9772 cut-off events. For 276771/276771 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 73025 event pairs, 576 based on Foata normal form. 161/9933 useless extension candidates. Maximal degree in co-relation 95829. Up to 2909 conditions per place. [2023-01-27 20:04:59,793 INFO L137 encePairwiseOnDemand]: 466/483 looper letters, 862 selfloop transitions, 734 changer transitions 76/1672 dead transitions. [2023-01-27 20:04:59,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 1672 transitions, 40351 flow [2023-01-27 20:04:59,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-01-27 20:04:59,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-01-27 20:04:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 8933 transitions. [2023-01-27 20:04:59,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2802246063115628 [2023-01-27 20:04:59,805 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 8933 transitions. [2023-01-27 20:04:59,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 8933 transitions. [2023-01-27 20:04:59,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:04:59,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 8933 transitions. [2023-01-27 20:04:59,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 135.34848484848484) internal successors, (8933), 66 states have internal predecessors, (8933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:59,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 483.0) internal successors, (32361), 67 states have internal predecessors, (32361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:59,824 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 483.0) internal successors, (32361), 67 states have internal predecessors, (32361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:04:59,824 INFO L175 Difference]: Start difference. First operand has 282 places, 659 transitions, 15971 flow. Second operand 66 states and 8933 transitions. [2023-01-27 20:04:59,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 1672 transitions, 40351 flow [2023-01-27 20:05:02,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1672 transitions, 39576 flow, removed 223 selfloop flow, removed 15 redundant places. [2023-01-27 20:05:02,313 INFO L231 Difference]: Finished difference. Result has 359 places, 1119 transitions, 28193 flow [2023-01-27 20:05:02,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=15461, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=28193, PETRI_PLACES=359, PETRI_TRANSITIONS=1119} [2023-01-27 20:05:02,314 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 334 predicate places. [2023-01-27 20:05:02,314 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 1119 transitions, 28193 flow [2023-01-27 20:05:02,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 131.52272727272728) internal successors, (5787), 44 states have internal predecessors, (5787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:02,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:05:02,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:05:02,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-01-27 20:05:02,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:05:02,536 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:05:02,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:05:02,536 INFO L85 PathProgramCache]: Analyzing trace with hash 875882456, now seen corresponding path program 10 times [2023-01-27 20:05:02,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:05:02,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874453040] [2023-01-27 20:05:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:05:02,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:05:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:05:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:05:03,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:05:03,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874453040] [2023-01-27 20:05:03,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874453040] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:05:03,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755952051] [2023-01-27 20:05:03,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:05:03,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:05:03,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:05:03,062 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:05:03,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-01-27 20:05:03,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:05:03,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:05:03,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 20:05:03,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:05:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 20:05:03,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:05:03,847 INFO L321 Elim1Store]: treesize reduction 13, result has 93.4 percent of original size [2023-01-27 20:05:03,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 119 treesize of output 218 [2023-01-27 20:05:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:05:04,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755952051] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:05:04,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:05:04,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 31 [2023-01-27 20:05:04,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824926488] [2023-01-27 20:05:04,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:05:04,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 20:05:04,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:05:04,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 20:05:04,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2023-01-27 20:05:04,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 483 [2023-01-27 20:05:04,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 1119 transitions, 28193 flow. Second operand has 31 states, 31 states have (on average 146.90322580645162) internal successors, (4554), 31 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:04,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:05:04,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 483 [2023-01-27 20:05:04,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:05:08,326 INFO L130 PetriNetUnfolder]: 5222/9254 cut-off events. [2023-01-27 20:05:08,326 INFO L131 PetriNetUnfolder]: For 394010/394010 co-relation queries the response was YES. [2023-01-27 20:05:08,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102732 conditions, 9254 events. 5222/9254 cut-off events. For 394010/394010 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 69053 event pairs, 1247 based on Foata normal form. 116/9370 useless extension candidates. Maximal degree in co-relation 102614. Up to 5923 conditions per place. [2023-01-27 20:05:08,447 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 779 selfloop transitions, 402 changer transitions 5/1186 dead transitions. [2023-01-27 20:05:08,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1186 transitions, 31900 flow [2023-01-27 20:05:08,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:05:08,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:05:08,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2256 transitions. [2023-01-27 20:05:08,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3113871635610766 [2023-01-27 20:05:08,449 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2256 transitions. [2023-01-27 20:05:08,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2256 transitions. [2023-01-27 20:05:08,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:05:08,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2256 transitions. [2023-01-27 20:05:08,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 150.4) internal successors, (2256), 15 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:08,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 483.0) internal successors, (7728), 16 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:08,454 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 483.0) internal successors, (7728), 16 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:08,454 INFO L175 Difference]: Start difference. First operand has 359 places, 1119 transitions, 28193 flow. Second operand 15 states and 2256 transitions. [2023-01-27 20:05:08,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1186 transitions, 31900 flow [2023-01-27 20:05:11,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1186 transitions, 30966 flow, removed 388 selfloop flow, removed 18 redundant places. [2023-01-27 20:05:11,677 INFO L231 Difference]: Finished difference. Result has 349 places, 1120 transitions, 28256 flow [2023-01-27 20:05:11,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=27353, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=28256, PETRI_PLACES=349, PETRI_TRANSITIONS=1120} [2023-01-27 20:05:11,678 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 324 predicate places. [2023-01-27 20:05:11,678 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 1120 transitions, 28256 flow [2023-01-27 20:05:11,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 146.90322580645162) internal successors, (4554), 31 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:11,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:05:11,679 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:05:11,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-01-27 20:05:11,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-01-27 20:05:11,884 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:05:11,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:05:11,886 INFO L85 PathProgramCache]: Analyzing trace with hash -357005494, now seen corresponding path program 11 times [2023-01-27 20:05:11,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:05:11,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304684798] [2023-01-27 20:05:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:05:11,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:05:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:05:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:05:12,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:05:12,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304684798] [2023-01-27 20:05:12,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304684798] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:05:12,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441257510] [2023-01-27 20:05:12,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:05:12,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:05:12,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:05:12,386 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:05:12,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-01-27 20:05:12,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 20:05:12,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:05:12,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 20:05:12,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:05:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:05:12,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:05:13,105 INFO L321 Elim1Store]: treesize reduction 41, result has 79.0 percent of original size [2023-01-27 20:05:13,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 141 treesize of output 193 [2023-01-27 20:05:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:05:13,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441257510] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:05:13,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:05:13,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 27 [2023-01-27 20:05:13,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047234463] [2023-01-27 20:05:13,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:05:13,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 20:05:13,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:05:13,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 20:05:13,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-01-27 20:05:13,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 483 [2023-01-27 20:05:13,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 1120 transitions, 28256 flow. Second operand has 27 states, 27 states have (on average 147.0) internal successors, (3969), 27 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:13,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:05:13,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 483 [2023-01-27 20:05:13,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:05:18,444 INFO L130 PetriNetUnfolder]: 5992/10828 cut-off events. [2023-01-27 20:05:18,444 INFO L131 PetriNetUnfolder]: For 433311/433311 co-relation queries the response was YES. [2023-01-27 20:05:18,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116377 conditions, 10828 events. 5992/10828 cut-off events. For 433311/433311 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 83873 event pairs, 1261 based on Foata normal form. 288/11116 useless extension candidates. Maximal degree in co-relation 116265. Up to 6416 conditions per place. [2023-01-27 20:05:18,571 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 999 selfloop transitions, 388 changer transitions 0/1387 dead transitions. [2023-01-27 20:05:18,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1387 transitions, 36552 flow [2023-01-27 20:05:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 20:05:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 20:05:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2728 transitions. [2023-01-27 20:05:18,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3137796181274442 [2023-01-27 20:05:18,575 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2728 transitions. [2023-01-27 20:05:18,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2728 transitions. [2023-01-27 20:05:18,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:05:18,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2728 transitions. [2023-01-27 20:05:18,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 151.55555555555554) internal successors, (2728), 18 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:18,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 483.0) internal successors, (9177), 19 states have internal predecessors, (9177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:18,580 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 483.0) internal successors, (9177), 19 states have internal predecessors, (9177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:18,580 INFO L175 Difference]: Start difference. First operand has 349 places, 1120 transitions, 28256 flow. Second operand 18 states and 2728 transitions. [2023-01-27 20:05:18,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1387 transitions, 36552 flow [2023-01-27 20:05:22,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1387 transitions, 35405 flow, removed 33 selfloop flow, removed 11 redundant places. [2023-01-27 20:05:22,198 INFO L231 Difference]: Finished difference. Result has 363 places, 1225 transitions, 31287 flow [2023-01-27 20:05:22,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=27272, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=31287, PETRI_PLACES=363, PETRI_TRANSITIONS=1225} [2023-01-27 20:05:22,200 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 338 predicate places. [2023-01-27 20:05:22,200 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1225 transitions, 31287 flow [2023-01-27 20:05:22,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 147.0) internal successors, (3969), 27 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:22,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:05:22,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:05:22,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-01-27 20:05:22,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:05:22,406 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:05:22,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:05:22,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1857435442, now seen corresponding path program 12 times [2023-01-27 20:05:22,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:05:22,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238632688] [2023-01-27 20:05:22,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:05:22,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:05:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:05:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:05:23,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:05:23,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238632688] [2023-01-27 20:05:23,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238632688] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:05:23,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855115902] [2023-01-27 20:05:23,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:05:23,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:05:23,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:05:23,061 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:05:23,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-01-27 20:05:23,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:05:23,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:05:23,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-27 20:05:23,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:05:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:05:23,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:05:24,196 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:05:24,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 64 [2023-01-27 20:05:24,255 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:05:24,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 64 [2023-01-27 20:05:24,279 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:05:24,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:05:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:05:24,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855115902] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:05:24,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:05:24,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 32 [2023-01-27 20:05:24,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485641114] [2023-01-27 20:05:24,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:05:24,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:05:24,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:05:24,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:05:24,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:05:24,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 483 [2023-01-27 20:05:24,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1225 transitions, 31287 flow. Second operand has 32 states, 32 states have (on average 140.125) internal successors, (4484), 32 states have internal predecessors, (4484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:24,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:05:24,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 483 [2023-01-27 20:05:24,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:05:42,367 INFO L130 PetriNetUnfolder]: 11221/20173 cut-off events. [2023-01-27 20:05:42,367 INFO L131 PetriNetUnfolder]: For 906641/906641 co-relation queries the response was YES. [2023-01-27 20:05:42,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227912 conditions, 20173 events. 11221/20173 cut-off events. For 906641/906641 co-relation queries the response was YES. Maximal size of possible extension queue 1291. Compared 172157 event pairs, 416 based on Foata normal form. 414/20587 useless extension candidates. Maximal degree in co-relation 227792. Up to 5983 conditions per place. [2023-01-27 20:05:42,603 INFO L137 encePairwiseOnDemand]: 467/483 looper letters, 1458 selfloop transitions, 1576 changer transitions 71/3105 dead transitions. [2023-01-27 20:05:42,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 3105 transitions, 77912 flow [2023-01-27 20:05:42,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-01-27 20:05:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2023-01-27 20:05:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 16923 transitions. [2023-01-27 20:05:42,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2994638212029516 [2023-01-27 20:05:42,612 INFO L72 ComplementDD]: Start complementDD. Operand 117 states and 16923 transitions. [2023-01-27 20:05:42,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 16923 transitions. [2023-01-27 20:05:42,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:05:42,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 117 states and 16923 transitions. [2023-01-27 20:05:42,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 118 states, 117 states have (on average 144.64102564102564) internal successors, (16923), 117 states have internal predecessors, (16923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:42,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 118 states, 118 states have (on average 483.0) internal successors, (56994), 118 states have internal predecessors, (56994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:42,651 INFO L81 ComplementDD]: Finished complementDD. Result has 118 states, 118 states have (on average 483.0) internal successors, (56994), 118 states have internal predecessors, (56994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:42,651 INFO L175 Difference]: Start difference. First operand has 363 places, 1225 transitions, 31287 flow. Second operand 117 states and 16923 transitions. [2023-01-27 20:05:42,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 3105 transitions, 77912 flow [2023-01-27 20:05:50,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 3105 transitions, 76534 flow, removed 599 selfloop flow, removed 8 redundant places. [2023-01-27 20:05:50,950 INFO L231 Difference]: Finished difference. Result has 525 places, 2278 transitions, 61850 flow [2023-01-27 20:05:50,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=30542, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=620, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=117, PETRI_FLOW=61850, PETRI_PLACES=525, PETRI_TRANSITIONS=2278} [2023-01-27 20:05:50,952 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 500 predicate places. [2023-01-27 20:05:50,952 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 2278 transitions, 61850 flow [2023-01-27 20:05:50,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 140.125) internal successors, (4484), 32 states have internal predecessors, (4484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:50,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:05:50,953 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:05:50,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-01-27 20:05:51,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-01-27 20:05:51,159 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:05:51,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:05:51,159 INFO L85 PathProgramCache]: Analyzing trace with hash 561451278, now seen corresponding path program 13 times [2023-01-27 20:05:51,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:05:51,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502342917] [2023-01-27 20:05:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:05:51,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:05:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:05:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:05:51,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:05:51,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502342917] [2023-01-27 20:05:51,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502342917] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:05:51,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625449807] [2023-01-27 20:05:51,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:05:51,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:05:51,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:05:51,813 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:05:51,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-01-27 20:05:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:05:51,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-27 20:05:51,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:05:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:05:52,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:05:52,506 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:05:52,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:05:52,539 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 20:05:52,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 70 [2023-01-27 20:05:52,553 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:05:52,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:05:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:05:52,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625449807] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:05:52,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:05:52,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 39 [2023-01-27 20:05:52,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978626994] [2023-01-27 20:05:52,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:05:52,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-27 20:05:52,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:05:52,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-27 20:05:52,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2023-01-27 20:05:52,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 483 [2023-01-27 20:05:52,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 2278 transitions, 61850 flow. Second operand has 40 states, 40 states have (on average 146.55) internal successors, (5862), 40 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:05:52,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:05:52,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 483 [2023-01-27 20:05:52,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:06:04,992 INFO L130 PetriNetUnfolder]: 10832/19196 cut-off events. [2023-01-27 20:06:04,992 INFO L131 PetriNetUnfolder]: For 942771/942771 co-relation queries the response was YES. [2023-01-27 20:06:05,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236030 conditions, 19196 events. 10832/19196 cut-off events. For 942771/942771 co-relation queries the response was YES. Maximal size of possible extension queue 1232. Compared 159714 event pairs, 2346 based on Foata normal form. 36/19232 useless extension candidates. Maximal degree in co-relation 235856. Up to 12036 conditions per place. [2023-01-27 20:06:05,262 INFO L137 encePairwiseOnDemand]: 469/483 looper letters, 1368 selfloop transitions, 973 changer transitions 0/2341 dead transitions. [2023-01-27 20:06:05,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 2341 transitions, 68122 flow [2023-01-27 20:06:05,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 20:06:05,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 20:06:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2996 transitions. [2023-01-27 20:06:05,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3101449275362319 [2023-01-27 20:06:05,265 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2996 transitions. [2023-01-27 20:06:05,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2996 transitions. [2023-01-27 20:06:05,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:06:05,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2996 transitions. [2023-01-27 20:06:05,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 149.8) internal successors, (2996), 20 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:05,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 483.0) internal successors, (10143), 21 states have internal predecessors, (10143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:05,271 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 483.0) internal successors, (10143), 21 states have internal predecessors, (10143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:05,271 INFO L175 Difference]: Start difference. First operand has 525 places, 2278 transitions, 61850 flow. Second operand 20 states and 2996 transitions. [2023-01-27 20:06:05,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 2341 transitions, 68122 flow [2023-01-27 20:06:20,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 2341 transitions, 59106 flow, removed 4371 selfloop flow, removed 17 redundant places. [2023-01-27 20:06:20,261 INFO L231 Difference]: Finished difference. Result has 528 places, 2291 transitions, 56385 flow [2023-01-27 20:06:20,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=53026, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=947, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=56385, PETRI_PLACES=528, PETRI_TRANSITIONS=2291} [2023-01-27 20:06:20,263 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 503 predicate places. [2023-01-27 20:06:20,263 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 2291 transitions, 56385 flow [2023-01-27 20:06:20,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 146.55) internal successors, (5862), 40 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:20,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:06:20,263 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:06:20,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-01-27 20:06:20,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:20,468 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:06:20,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:06:20,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1055073050, now seen corresponding path program 14 times [2023-01-27 20:06:20,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:06:20,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955616563] [2023-01-27 20:06:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:20,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:06:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:06:20,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:06:20,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955616563] [2023-01-27 20:06:20,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955616563] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:06:20,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291055978] [2023-01-27 20:06:20,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:06:20,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:20,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:06:20,905 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:06:20,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-01-27 20:06:21,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:06:21,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:06:21,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-27 20:06:21,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:06:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:06:21,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:06:21,562 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:06:21,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:06:21,597 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 20:06:21,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 70 [2023-01-27 20:06:21,613 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:06:21,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:06:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:06:21,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291055978] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:06:21,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:06:21,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 39 [2023-01-27 20:06:21,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366622238] [2023-01-27 20:06:21,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:06:21,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-27 20:06:21,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:06:21,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-27 20:06:21,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2023-01-27 20:06:21,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 483 [2023-01-27 20:06:21,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 2291 transitions, 56385 flow. Second operand has 40 states, 40 states have (on average 146.55) internal successors, (5862), 40 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:21,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:06:21,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 483 [2023-01-27 20:06:21,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:06:34,319 INFO L130 PetriNetUnfolder]: 11284/19982 cut-off events. [2023-01-27 20:06:34,320 INFO L131 PetriNetUnfolder]: For 534387/534387 co-relation queries the response was YES. [2023-01-27 20:06:34,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190817 conditions, 19982 events. 11284/19982 cut-off events. For 534387/534387 co-relation queries the response was YES. Maximal size of possible extension queue 1301. Compared 167361 event pairs, 1721 based on Foata normal form. 144/20126 useless extension candidates. Maximal degree in co-relation 190646. Up to 7944 conditions per place. [2023-01-27 20:06:34,610 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 1674 selfloop transitions, 820 changer transitions 2/2496 dead transitions. [2023-01-27 20:06:34,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 2496 transitions, 64589 flow [2023-01-27 20:06:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 20:06:34,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 20:06:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4235 transitions. [2023-01-27 20:06:34,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31314699792960665 [2023-01-27 20:06:34,613 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4235 transitions. [2023-01-27 20:06:34,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4235 transitions. [2023-01-27 20:06:34,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:06:34,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4235 transitions. [2023-01-27 20:06:34,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 151.25) internal successors, (4235), 28 states have internal predecessors, (4235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:34,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 483.0) internal successors, (14007), 29 states have internal predecessors, (14007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:34,621 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 483.0) internal successors, (14007), 29 states have internal predecessors, (14007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:34,621 INFO L175 Difference]: Start difference. First operand has 528 places, 2291 transitions, 56385 flow. Second operand 28 states and 4235 transitions. [2023-01-27 20:06:34,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 2496 transitions, 64589 flow [2023-01-27 20:06:42,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 2496 transitions, 63410 flow, removed 96 selfloop flow, removed 13 redundant places. [2023-01-27 20:06:42,662 INFO L231 Difference]: Finished difference. Result has 547 places, 2345 transitions, 58252 flow [2023-01-27 20:06:42,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=55232, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=764, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=58252, PETRI_PLACES=547, PETRI_TRANSITIONS=2345} [2023-01-27 20:06:42,663 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 522 predicate places. [2023-01-27 20:06:42,663 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 2345 transitions, 58252 flow [2023-01-27 20:06:42,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 146.55) internal successors, (5862), 40 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:42,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:06:42,664 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:06:42,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-01-27 20:06:42,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:42,868 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:06:42,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:06:42,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2127378916, now seen corresponding path program 15 times [2023-01-27 20:06:42,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:06:42,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556265235] [2023-01-27 20:06:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:06:42,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:06:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:06:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:06:43,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:06:43,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556265235] [2023-01-27 20:06:43,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556265235] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:06:43,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132536833] [2023-01-27 20:06:43,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:06:43,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:06:43,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:06:43,261 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:06:43,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-01-27 20:06:43,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 20:06:43,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:06:43,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 64 conjunts are in the unsatisfiable core [2023-01-27 20:06:43,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:06:43,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 20:06:43,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:06:43,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:06:44,157 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:06:44,160 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-01-27 20:06:44,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 1 [2023-01-27 20:06:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:06:44,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:06:45,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:06:45,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2023-01-27 20:06:45,391 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:06:45,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 422 treesize of output 370 [2023-01-27 20:06:45,404 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:06:45,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 271 [2023-01-27 20:06:45,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:06:45,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 223 [2023-01-27 20:06:45,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:06:45,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 130 [2023-01-27 20:06:45,554 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-01-27 20:06:45,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3062 treesize of output 2690 [2023-01-27 20:06:45,650 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:06:45,650 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:06:45,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:06:45,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1302 treesize of output 1202 [2023-01-27 20:06:45,722 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:06:45,722 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 20:06:45,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:06:45,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1158 treesize of output 914 [2023-01-27 20:06:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:06:50,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132536833] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:06:50,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:06:50,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 43 [2023-01-27 20:06:50,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529284095] [2023-01-27 20:06:50,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:06:50,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-27 20:06:50,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:06:50,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-27 20:06:50,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1652, Unknown=7, NotChecked=0, Total=1892 [2023-01-27 20:06:50,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 483 [2023-01-27 20:06:50,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 2345 transitions, 58252 flow. Second operand has 44 states, 44 states have (on average 131.52272727272728) internal successors, (5787), 44 states have internal predecessors, (5787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:06:50,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:06:50,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 483 [2023-01-27 20:06:50,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:07:14,980 WARN L222 SmtUtils]: Spent 12.39s on a formula simplification. DAG size of input: 91 DAG size of output: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 20:07:24,059 WARN L222 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 73 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 20:07:33,228 WARN L222 SmtUtils]: Spent 8.98s on a formula simplification. DAG size of input: 117 DAG size of output: 114 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 20:07:45,600 WARN L222 SmtUtils]: Spent 12.24s on a formula simplification. DAG size of input: 98 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 20:08:00,398 WARN L222 SmtUtils]: Spent 12.79s on a formula simplification. DAG size of input: 116 DAG size of output: 113 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 20:08:12,957 WARN L222 SmtUtils]: Spent 8.79s on a formula simplification. DAG size of input: 121 DAG size of output: 118 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 20:08:32,860 WARN L222 SmtUtils]: Spent 14.71s on a formula simplification. DAG size of input: 120 DAG size of output: 117 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 20:08:54,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 20:09:01,668 INFO L130 PetriNetUnfolder]: 15570/27259 cut-off events. [2023-01-27 20:09:01,669 INFO L131 PetriNetUnfolder]: For 780775/780775 co-relation queries the response was YES. [2023-01-27 20:09:02,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271664 conditions, 27259 events. 15570/27259 cut-off events. For 780775/780775 co-relation queries the response was YES. Maximal size of possible extension queue 1757. Compared 236184 event pairs, 1619 based on Foata normal form. 555/27814 useless extension candidates. Maximal degree in co-relation 271489. Up to 6961 conditions per place. [2023-01-27 20:09:02,305 INFO L137 encePairwiseOnDemand]: 465/483 looper letters, 1923 selfloop transitions, 2746 changer transitions 6/4675 dead transitions. [2023-01-27 20:09:02,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 4675 transitions, 116228 flow [2023-01-27 20:09:02,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-01-27 20:09:02,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2023-01-27 20:09:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 16748 transitions. [2023-01-27 20:09:02,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28191014829402955 [2023-01-27 20:09:02,315 INFO L72 ComplementDD]: Start complementDD. Operand 123 states and 16748 transitions. [2023-01-27 20:09:02,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 16748 transitions. [2023-01-27 20:09:02,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:09:02,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 123 states and 16748 transitions. [2023-01-27 20:09:02,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 124 states, 123 states have (on average 136.16260162601625) internal successors, (16748), 123 states have internal predecessors, (16748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:02,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 124 states, 124 states have (on average 483.0) internal successors, (59892), 124 states have internal predecessors, (59892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:02,360 INFO L81 ComplementDD]: Finished complementDD. Result has 124 states, 124 states have (on average 483.0) internal successors, (59892), 124 states have internal predecessors, (59892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:02,360 INFO L175 Difference]: Start difference. First operand has 547 places, 2345 transitions, 58252 flow. Second operand 123 states and 16748 transitions. [2023-01-27 20:09:02,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 4675 transitions, 116228 flow [2023-01-27 20:09:16,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 4675 transitions, 114347 flow, removed 552 selfloop flow, removed 18 redundant places. [2023-01-27 20:09:16,082 INFO L231 Difference]: Finished difference. Result has 702 places, 3528 transitions, 95535 flow [2023-01-27 20:09:16,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=53630, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=123, PETRI_FLOW=95535, PETRI_PLACES=702, PETRI_TRANSITIONS=3528} [2023-01-27 20:09:16,084 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 677 predicate places. [2023-01-27 20:09:16,084 INFO L495 AbstractCegarLoop]: Abstraction has has 702 places, 3528 transitions, 95535 flow [2023-01-27 20:09:16,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 131.52272727272728) internal successors, (5787), 44 states have internal predecessors, (5787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:16,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:09:16,084 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:09:16,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-01-27 20:09:16,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:09:16,291 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:09:16,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:09:16,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2138061786, now seen corresponding path program 16 times [2023-01-27 20:09:16,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:09:16,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697763592] [2023-01-27 20:09:16,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:09:16,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:09:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:09:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:09:16,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:09:16,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697763592] [2023-01-27 20:09:16,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697763592] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:09:16,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948258688] [2023-01-27 20:09:16,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:09:16,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:09:16,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:09:16,755 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:09:16,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-01-27 20:09:16,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:09:16,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:09:16,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 20:09:16,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:09:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 20:09:17,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:09:17,382 INFO L321 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-01-27 20:09:17,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 131 treesize of output 230 [2023-01-27 20:09:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:09:21,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948258688] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:09:21,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:09:21,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 31 [2023-01-27 20:09:21,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127952217] [2023-01-27 20:09:21,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:09:21,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 20:09:21,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:09:21,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 20:09:21,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2023-01-27 20:09:21,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 483 [2023-01-27 20:09:21,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 3528 transitions, 95535 flow. Second operand has 31 states, 31 states have (on average 146.90322580645162) internal successors, (4554), 31 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:21,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:09:21,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 483 [2023-01-27 20:09:21,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:09:50,919 INFO L130 PetriNetUnfolder]: 16135/29138 cut-off events. [2023-01-27 20:09:50,920 INFO L131 PetriNetUnfolder]: For 958247/958247 co-relation queries the response was YES. [2023-01-27 20:09:51,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309088 conditions, 29138 events. 16135/29138 cut-off events. For 958247/958247 co-relation queries the response was YES. Maximal size of possible extension queue 1880. Compared 263790 event pairs, 1550 based on Foata normal form. 222/29360 useless extension candidates. Maximal degree in co-relation 308863. Up to 7161 conditions per place. [2023-01-27 20:09:51,793 INFO L137 encePairwiseOnDemand]: 467/483 looper letters, 1533 selfloop transitions, 2396 changer transitions 2/3931 dead transitions. [2023-01-27 20:09:51,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 3931 transitions, 112452 flow [2023-01-27 20:09:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-01-27 20:09:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-01-27 20:09:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 7572 transitions. [2023-01-27 20:09:51,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3135403726708075 [2023-01-27 20:09:51,798 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 7572 transitions. [2023-01-27 20:09:51,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 7572 transitions. [2023-01-27 20:09:51,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:09:51,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 7572 transitions. [2023-01-27 20:09:51,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 151.44) internal successors, (7572), 50 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:51,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 483.0) internal successors, (24633), 51 states have internal predecessors, (24633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:51,814 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 483.0) internal successors, (24633), 51 states have internal predecessors, (24633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:09:51,814 INFO L175 Difference]: Start difference. First operand has 702 places, 3528 transitions, 95535 flow. Second operand 50 states and 7572 transitions. [2023-01-27 20:09:51,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 3931 transitions, 112452 flow [2023-01-27 20:10:17,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 3931 transitions, 104911 flow, removed 3589 selfloop flow, removed 28 redundant places. [2023-01-27 20:10:17,558 INFO L231 Difference]: Finished difference. Result has 733 places, 3662 transitions, 101179 flow [2023-01-27 20:10:17,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=86026, PETRI_DIFFERENCE_MINUEND_PLACES=671, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=101179, PETRI_PLACES=733, PETRI_TRANSITIONS=3662} [2023-01-27 20:10:17,560 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 708 predicate places. [2023-01-27 20:10:17,561 INFO L495 AbstractCegarLoop]: Abstraction has has 733 places, 3662 transitions, 101179 flow [2023-01-27 20:10:17,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 146.90322580645162) internal successors, (4554), 31 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:17,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:10:17,561 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:10:17,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-01-27 20:10:17,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:10:17,767 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:10:17,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:10:17,767 INFO L85 PathProgramCache]: Analyzing trace with hash -389256674, now seen corresponding path program 17 times [2023-01-27 20:10:17,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:10:17,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321828251] [2023-01-27 20:10:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:10:17,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:10:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:10:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:10:18,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:10:18,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321828251] [2023-01-27 20:10:18,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321828251] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:10:18,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909752444] [2023-01-27 20:10:18,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:10:18,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:10:18,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:10:18,242 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:10:18,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-01-27 20:10:18,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 20:10:18,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:10:18,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 20:10:18,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:10:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:10:18,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:10:18,963 INFO L321 Elim1Store]: treesize reduction 41, result has 79.0 percent of original size [2023-01-27 20:10:18,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 141 treesize of output 193 [2023-01-27 20:10:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:10:19,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909752444] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:10:19,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:10:19,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 27 [2023-01-27 20:10:19,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805466423] [2023-01-27 20:10:19,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:10:19,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 20:10:19,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:10:19,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 20:10:19,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2023-01-27 20:10:19,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 483 [2023-01-27 20:10:19,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 3662 transitions, 101179 flow. Second operand has 27 states, 27 states have (on average 147.14814814814815) internal successors, (3973), 27 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:19,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:10:19,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 483 [2023-01-27 20:10:19,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:10:48,895 INFO L130 PetriNetUnfolder]: 17908/32593 cut-off events. [2023-01-27 20:10:48,895 INFO L131 PetriNetUnfolder]: For 1042757/1042757 co-relation queries the response was YES. [2023-01-27 20:10:49,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333345 conditions, 32593 events. 17908/32593 cut-off events. For 1042757/1042757 co-relation queries the response was YES. Maximal size of possible extension queue 2023. Compared 301161 event pairs, 5379 based on Foata normal form. 266/32853 useless extension candidates. Maximal degree in co-relation 333117. Up to 14234 conditions per place. [2023-01-27 20:10:49,658 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 3731 selfloop transitions, 448 changer transitions 14/4193 dead transitions. [2023-01-27 20:10:49,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 761 places, 4193 transitions, 121048 flow [2023-01-27 20:10:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 20:10:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 20:10:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4411 transitions. [2023-01-27 20:10:49,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3149139715856358 [2023-01-27 20:10:49,661 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4411 transitions. [2023-01-27 20:10:49,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4411 transitions. [2023-01-27 20:10:49,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:10:49,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4411 transitions. [2023-01-27 20:10:49,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 152.10344827586206) internal successors, (4411), 29 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:49,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 483.0) internal successors, (14490), 30 states have internal predecessors, (14490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:49,670 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 483.0) internal successors, (14490), 30 states have internal predecessors, (14490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:10:49,670 INFO L175 Difference]: Start difference. First operand has 733 places, 3662 transitions, 101179 flow. Second operand 29 states and 4411 transitions. [2023-01-27 20:10:49,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 761 places, 4193 transitions, 121048 flow [2023-01-27 20:11:13,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 734 places, 4193 transitions, 118940 flow, removed 619 selfloop flow, removed 27 redundant places. [2023-01-27 20:11:13,867 INFO L231 Difference]: Finished difference. Result has 743 places, 3733 transitions, 102169 flow [2023-01-27 20:11:13,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=99261, PETRI_DIFFERENCE_MINUEND_PLACES=706, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=102169, PETRI_PLACES=743, PETRI_TRANSITIONS=3733} [2023-01-27 20:11:13,869 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 718 predicate places. [2023-01-27 20:11:13,869 INFO L495 AbstractCegarLoop]: Abstraction has has 743 places, 3733 transitions, 102169 flow [2023-01-27 20:11:13,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 147.14814814814815) internal successors, (3973), 27 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:13,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:11:13,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:11:13,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-01-27 20:11:14,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-01-27 20:11:14,075 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:11:14,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:11:14,076 INFO L85 PathProgramCache]: Analyzing trace with hash -903731730, now seen corresponding path program 18 times [2023-01-27 20:11:14,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:11:14,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598679822] [2023-01-27 20:11:14,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:11:14,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:11:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:11:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:11:14,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:11:14,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598679822] [2023-01-27 20:11:14,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598679822] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:11:14,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308514625] [2023-01-27 20:11:14,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:11:14,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:11:14,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:11:14,582 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:11:14,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-01-27 20:11:14,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 20:11:14,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:11:14,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-27 20:11:14,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:11:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:11:15,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:11:15,817 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:11:15,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:11:15,853 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 20:11:15,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 70 [2023-01-27 20:11:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:11:16,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308514625] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:11:16,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:11:16,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2023-01-27 20:11:16,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725068394] [2023-01-27 20:11:16,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:11:16,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-27 20:11:16,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:11:16,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-27 20:11:16,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1222, Unknown=0, NotChecked=0, Total=1482 [2023-01-27 20:11:16,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 483 [2023-01-27 20:11:16,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 3733 transitions, 102169 flow. Second operand has 39 states, 39 states have (on average 139.64102564102564) internal successors, (5446), 39 states have internal predecessors, (5446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:16,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:11:16,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 483 [2023-01-27 20:11:16,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:11:52,840 INFO L130 PetriNetUnfolder]: 18729/34102 cut-off events. [2023-01-27 20:11:52,840 INFO L131 PetriNetUnfolder]: For 1060792/1060792 co-relation queries the response was YES. [2023-01-27 20:11:54,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346177 conditions, 34102 events. 18729/34102 cut-off events. For 1060792/1060792 co-relation queries the response was YES. Maximal size of possible extension queue 2168. Compared 317460 event pairs, 3016 based on Foata normal form. 32/34128 useless extension candidates. Maximal degree in co-relation 345950. Up to 8041 conditions per place. [2023-01-27 20:11:54,362 INFO L137 encePairwiseOnDemand]: 467/483 looper letters, 3063 selfloop transitions, 1783 changer transitions 10/4856 dead transitions. [2023-01-27 20:11:54,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 802 places, 4856 transitions, 136118 flow [2023-01-27 20:11:54,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-01-27 20:11:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-01-27 20:11:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 8607 transitions. [2023-01-27 20:11:54,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29699792960662524 [2023-01-27 20:11:54,368 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 8607 transitions. [2023-01-27 20:11:54,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 8607 transitions. [2023-01-27 20:11:54,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:11:54,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 8607 transitions. [2023-01-27 20:11:54,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 143.45) internal successors, (8607), 60 states have internal predecessors, (8607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:54,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 483.0) internal successors, (29463), 61 states have internal predecessors, (29463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:54,389 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 483.0) internal successors, (29463), 61 states have internal predecessors, (29463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:11:54,389 INFO L175 Difference]: Start difference. First operand has 743 places, 3733 transitions, 102169 flow. Second operand 60 states and 8607 transitions. [2023-01-27 20:11:54,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 802 places, 4856 transitions, 136118 flow [2023-01-27 20:12:19,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 788 places, 4856 transitions, 134599 flow, removed 275 selfloop flow, removed 14 redundant places. [2023-01-27 20:12:19,213 INFO L231 Difference]: Finished difference. Result has 808 places, 4098 transitions, 116128 flow [2023-01-27 20:12:19,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=100743, PETRI_DIFFERENCE_MINUEND_PLACES=729, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1412, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2068, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=116128, PETRI_PLACES=808, PETRI_TRANSITIONS=4098} [2023-01-27 20:12:19,216 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 783 predicate places. [2023-01-27 20:12:19,216 INFO L495 AbstractCegarLoop]: Abstraction has has 808 places, 4098 transitions, 116128 flow [2023-01-27 20:12:19,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 139.64102564102564) internal successors, (5446), 39 states have internal predecessors, (5446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:19,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:12:19,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:12:19,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-01-27 20:12:19,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-01-27 20:12:19,422 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:12:19,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:12:19,422 INFO L85 PathProgramCache]: Analyzing trace with hash 627213672, now seen corresponding path program 19 times [2023-01-27 20:12:19,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:12:19,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064502866] [2023-01-27 20:12:19,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:12:19,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:12:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:12:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:12:19,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:12:19,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064502866] [2023-01-27 20:12:19,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064502866] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:12:19,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586233106] [2023-01-27 20:12:19,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:12:19,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:12:19,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:12:19,849 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:12:19,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-01-27 20:12:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:12:20,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-27 20:12:20,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:12:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:12:20,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:12:20,593 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:12:20,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:12:20,626 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 20:12:20,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 70 [2023-01-27 20:12:20,641 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:12:20,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:12:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:12:20,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586233106] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:12:20,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:12:20,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 39 [2023-01-27 20:12:20,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985262379] [2023-01-27 20:12:20,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:12:20,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-27 20:12:20,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:12:20,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-27 20:12:20,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1316, Unknown=0, NotChecked=0, Total=1560 [2023-01-27 20:12:20,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 483 [2023-01-27 20:12:20,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 808 places, 4098 transitions, 116128 flow. Second operand has 40 states, 40 states have (on average 146.6) internal successors, (5864), 40 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:12:20,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:12:20,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 483 [2023-01-27 20:12:20,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:12:59,539 INFO L130 PetriNetUnfolder]: 18868/34341 cut-off events. [2023-01-27 20:12:59,540 INFO L131 PetriNetUnfolder]: For 1146278/1146278 co-relation queries the response was YES. [2023-01-27 20:13:00,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359011 conditions, 34341 events. 18868/34341 cut-off events. For 1146278/1146278 co-relation queries the response was YES. Maximal size of possible extension queue 2141. Compared 319298 event pairs, 6568 based on Foata normal form. 176/34517 useless extension candidates. Maximal degree in co-relation 358766. Up to 16389 conditions per place. [2023-01-27 20:13:00,966 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 3738 selfloop transitions, 486 changer transitions 10/4234 dead transitions. [2023-01-27 20:13:00,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 841 places, 4234 transitions, 126527 flow [2023-01-27 20:13:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-27 20:13:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-27 20:13:00,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5106 transitions. [2023-01-27 20:13:00,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31092436974789917 [2023-01-27 20:13:00,969 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5106 transitions. [2023-01-27 20:13:00,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5106 transitions. [2023-01-27 20:13:00,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:13:00,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5106 transitions. [2023-01-27 20:13:00,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 150.1764705882353) internal successors, (5106), 34 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:00,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 483.0) internal successors, (16905), 35 states have internal predecessors, (16905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:00,979 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 483.0) internal successors, (16905), 35 states have internal predecessors, (16905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:13:00,979 INFO L175 Difference]: Start difference. First operand has 808 places, 4098 transitions, 116128 flow. Second operand 34 states and 5106 transitions. [2023-01-27 20:13:00,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 841 places, 4234 transitions, 126527 flow Received shutdown request... [2023-01-27 20:13:08,595 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 20:13:08,600 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 20:13:08,600 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 20:13:08,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-01-27 20:13:08,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:13:08,800 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-27 20:13:08,805 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 20:13:08,805 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 20:13:08,806 INFO L445 BasicCegarLoop]: Path program histogram: [20, 19, 13, 11, 2, 2, 1, 1, 1, 1] [2023-01-27 20:13:08,808 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 20:13:08,808 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 20:13:08,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 08:13:08 BasicIcfg [2023-01-27 20:13:08,810 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 20:13:08,811 INFO L158 Benchmark]: Toolchain (without parser) took 830181.06ms. Allocated memory was 629.1MB in the beginning and 10.0GB in the end (delta: 9.4GB). Free memory was 589.5MB in the beginning and 7.6GB in the end (delta: -7.0GB). Peak memory consumption was 6.0GB. Max. memory is 16.0GB. [2023-01-27 20:13:08,811 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 373.3MB. Free memory is still 321.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 20:13:08,811 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.49ms. Allocated memory is still 629.1MB. Free memory was 589.5MB in the beginning and 577.6MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-27 20:13:08,811 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.66ms. Allocated memory is still 629.1MB. Free memory was 577.6MB in the beginning and 575.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 20:13:08,811 INFO L158 Benchmark]: Boogie Preprocessor took 19.65ms. Allocated memory is still 629.1MB. Free memory was 575.5MB in the beginning and 573.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 20:13:08,811 INFO L158 Benchmark]: RCFGBuilder took 484.04ms. Allocated memory is still 629.1MB. Free memory was 573.4MB in the beginning and 553.5MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-01-27 20:13:08,815 INFO L158 Benchmark]: TraceAbstraction took 829464.29ms. Allocated memory was 629.1MB in the beginning and 10.0GB in the end (delta: 9.4GB). Free memory was 553.0MB in the beginning and 7.6GB in the end (delta: -7.1GB). Peak memory consumption was 5.9GB. Max. memory is 16.0GB. [2023-01-27 20:13:08,816 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 373.3MB. Free memory is still 321.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 182.49ms. Allocated memory is still 629.1MB. Free memory was 589.5MB in the beginning and 577.6MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 26.66ms. Allocated memory is still 629.1MB. Free memory was 577.6MB in the beginning and 575.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 19.65ms. Allocated memory is still 629.1MB. Free memory was 575.5MB in the beginning and 573.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 484.04ms. Allocated memory is still 629.1MB. Free memory was 573.4MB in the beginning and 553.5MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 829464.29ms. Allocated memory was 629.1MB in the beginning and 10.0GB in the end (delta: 9.4GB). Free memory was 553.0MB in the beginning and 7.6GB in the end (delta: -7.1GB). Peak memory consumption was 5.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.8s, 207 PlacesBefore, 25 PlacesAfterwards, 221 TransitionsBefore, 23 TransitionsAfterwards, 5192 CoEnabledTransitionPairs, 8 FixpointIterations, 106 TrivialSequentialCompositions, 81 ConcurrentSequentialCompositions, 28 TrivialYvCompositions, 21 ConcurrentYvCompositions, 16 ChoiceCompositions, 252 TotalNumberOfCompositions, 5413 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4726, independent: 4651, independent conditional: 0, independent unconditional: 4651, dependent: 75, dependent conditional: 0, dependent unconditional: 75, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2952, independent: 2934, independent conditional: 0, independent unconditional: 2934, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4726, independent: 1717, independent conditional: 0, independent unconditional: 1717, dependent: 57, dependent conditional: 0, dependent unconditional: 57, unknown: 2952, unknown conditional: 0, unknown unconditional: 2952] , Statistics on independence cache: Total cache size (in pairs): 42, Positive cache size: 37, Positive conditional cache size: 0, Positive unconditional cache size: 37, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 293 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 829.3s, OverallIterations: 71, TraceHistogramMax: 2, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 675.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.0s, HoareTripleCheckerStatistics: 124 mSolverCounterUnknown, 15138 SdHoareTripleChecker+Valid, 34.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 15138 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 31.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 399 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 849 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50212 IncrementalHoareTripleChecker+Invalid, 51584 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 849 mSolverCounterUnsat, 0 mSDtfsCounter, 50212 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4044 GetRequests, 1300 SyntacticMatches, 58 SemanticMatches, 2686 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 38741 ImplicationChecksByTransitivity, 207.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116128occurred in iteration=70, InterpolantAutomatonStates: 1332, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 4.0s SatisfiabilityAnalysisTime, 125.7s InterpolantComputationTime, 2675 NumberOfCodeBlocks, 2646 NumberOfCodeBlocksAsserted, 170 NumberOfCheckSat, 3464 ConstructedInterpolants, 157 QuantifiedInterpolants, 65337 SizeOfPredicates, 1620 NumberOfNonLiveVariables, 12908 ConjunctsInSsa, 2012 ConjunctsInUnsatCore, 176 InterpolantComputations, 34 PerfectInterpolantSequences, 340/827 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown