/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/goblint-regression/28-race_reach_20-callback_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:11:17,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:11:17,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:11:17,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:11:17,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:11:17,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:11:17,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:11:17,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:11:17,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:11:17,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:11:17,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:11:17,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:11:17,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:11:17,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:11:17,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:11:17,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:11:17,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:11:17,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:11:17,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:11:17,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:11:17,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:11:17,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:11:17,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:11:17,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:11:17,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:11:17,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:11:17,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:11:17,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:11:17,503 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 19:11:17,530 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:11:17,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:11:17,531 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:11:17,531 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:11:17,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:11:17,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:11:17,533 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:11:17,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:11:17,533 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:11:17,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:11:17,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:11:17,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:11:17,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:11:17,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:11:17,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:11:17,534 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:11:17,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:11:17,534 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:11:17,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:11:17,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:11:17,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:11:17,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:11:17,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:11:17,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:11:17,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:11:17,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:11:17,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:11:17,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:11:17,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:11:17,536 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:11:17,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:11:17,536 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:11:17,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:11:17,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:11:17,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:11:17,766 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:11:17,766 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:11:17,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-01-27 19:11:18,990 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:11:19,218 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:11:19,219 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-01-27 19:11:19,230 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a074ec7/5d5040d62575433ea4a5abacb4b0a8e0/FLAG0944b7306 [2023-01-27 19:11:19,241 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a074ec7/5d5040d62575433ea4a5abacb4b0a8e0 [2023-01-27 19:11:19,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:11:19,245 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:11:19,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:11:19,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:11:19,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:11:19,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:11:19" (1/1) ... [2023-01-27 19:11:19,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@792c58ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:19, skipping insertion in model container [2023-01-27 19:11:19,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:11:19" (1/1) ... [2023-01-27 19:11:19,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:11:19,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:11:19,565 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i[30212,30225] [2023-01-27 19:11:19,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:11:19,624 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:11:19,660 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i[30212,30225] [2023-01-27 19:11:19,697 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:11:19,723 WARN L667 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 19:11:19,728 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:11:19,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:19 WrapperNode [2023-01-27 19:11:19,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:11:19,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:11:19,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:11:19,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:11:19,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:19" (1/1) ... [2023-01-27 19:11:19,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:19" (1/1) ... [2023-01-27 19:11:19,769 INFO L138 Inliner]: procedures = 173, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 135 [2023-01-27 19:11:19,769 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:11:19,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:11:19,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:11:19,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:11:19,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:19" (1/1) ... [2023-01-27 19:11:19,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:19" (1/1) ... [2023-01-27 19:11:19,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:19" (1/1) ... [2023-01-27 19:11:19,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:19" (1/1) ... [2023-01-27 19:11:19,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:19" (1/1) ... [2023-01-27 19:11:19,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:19" (1/1) ... [2023-01-27 19:11:19,800 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:19" (1/1) ... [2023-01-27 19:11:19,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:19" (1/1) ... [2023-01-27 19:11:19,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:11:19,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:11:19,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:11:19,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:11:19,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:19" (1/1) ... [2023-01-27 19:11:19,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:11:19,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:11:19,847 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 19:11:19,854 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 19:11:19,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:11:19,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:11:19,884 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:11:19,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:11:19,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:11:19,885 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:11:19,885 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:11:19,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:11:19,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:11:19,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:11:19,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:11:19,890 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 19:11:20,013 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:11:20,014 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:11:20,296 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:11:20,303 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:11:20,303 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-01-27 19:11:20,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:11:20 BoogieIcfgContainer [2023-01-27 19:11:20,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:11:20,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:11:20,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:11:20,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:11:20,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:11:19" (1/3) ... [2023-01-27 19:11:20,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2631f935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:11:20, skipping insertion in model container [2023-01-27 19:11:20,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:19" (2/3) ... [2023-01-27 19:11:20,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2631f935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:11:20, skipping insertion in model container [2023-01-27 19:11:20,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:11:20" (3/3) ... [2023-01-27 19:11:20,312 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_20-callback_racefree.i [2023-01-27 19:11:20,327 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:11:20,327 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 19:11:20,327 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:11:20,372 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:11:20,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 137 transitions, 282 flow [2023-01-27 19:11:20,458 INFO L130 PetriNetUnfolder]: 26/207 cut-off events. [2023-01-27 19:11:20,459 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:11:20,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 207 events. 26/207 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 534 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-01-27 19:11:20,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 137 transitions, 282 flow [2023-01-27 19:11:20,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 132 transitions, 269 flow [2023-01-27 19:11:20,471 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:11:20,480 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 132 transitions, 269 flow [2023-01-27 19:11:20,482 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 132 transitions, 269 flow [2023-01-27 19:11:20,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 132 transitions, 269 flow [2023-01-27 19:11:20,530 INFO L130 PetriNetUnfolder]: 25/202 cut-off events. [2023-01-27 19:11:20,531 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:11:20,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 202 events. 25/202 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 496 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-01-27 19:11:20,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 3040 [2023-01-27 19:11:23,493 INFO L134 LiptonReduction]: Checked pairs total: 4319 [2023-01-27 19:11:23,493 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-01-27 19:11:23,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:11:23,511 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;@2f39ebd3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:11:23,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 19:11:23,515 INFO L130 PetriNetUnfolder]: 6/25 cut-off events. [2023-01-27 19:11:23,516 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:11:23,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:23,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:11:23,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 19:11:23,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:23,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2020158016, now seen corresponding path program 1 times [2023-01-27 19:11:23,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:23,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458484185] [2023-01-27 19:11:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:23,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:23,817 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 19:11:23,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:11:23,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458484185] [2023-01-27 19:11:23,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458484185] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:11:23,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:11:23,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:11:23,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259544269] [2023-01-27 19:11:23,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:11:23,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:11:23,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:11:23,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:11:23,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:11:23,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 258 [2023-01-27 19:11:23,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 34 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:23,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:11:23,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 258 [2023-01-27 19:11:23,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:11:23,948 INFO L130 PetriNetUnfolder]: 88/207 cut-off events. [2023-01-27 19:11:23,948 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:11:23,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 207 events. 88/207 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 719 event pairs, 32 based on Foata normal form. 29/194 useless extension candidates. Maximal degree in co-relation 356. Up to 122 conditions per place. [2023-01-27 19:11:23,953 INFO L137 encePairwiseOnDemand]: 245/258 looper letters, 23 selfloop transitions, 2 changer transitions 4/32 dead transitions. [2023-01-27 19:11:23,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 32 transitions, 127 flow [2023-01-27 19:11:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:11:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:11:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2023-01-27 19:11:23,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5090439276485789 [2023-01-27 19:11:23,974 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2023-01-27 19:11:23,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2023-01-27 19:11:23,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:11:23,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2023-01-27 19:11:23,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:23,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:23,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:23,994 INFO L175 Difference]: Start difference. First operand has 26 places, 34 transitions, 73 flow. Second operand 3 states and 394 transitions. [2023-01-27 19:11:23,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 32 transitions, 127 flow [2023-01-27 19:11:23,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 32 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:11:23,999 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 63 flow [2023-01-27 19:11:24,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-01-27 19:11:24,004 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-01-27 19:11:24,004 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 63 flow [2023-01-27 19:11:24,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:24,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:24,005 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 19:11:24,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:11:24,006 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 19:11:24,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:24,007 INFO L85 PathProgramCache]: Analyzing trace with hash -2020137906, now seen corresponding path program 1 times [2023-01-27 19:11:24,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:24,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608810301] [2023-01-27 19:11:24,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:24,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:24,056 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:11:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:24,145 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:11:24,146 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:11:24,147 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-01-27 19:11:24,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-27 19:11:24,149 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-27 19:11:24,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:11:24,149 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:11:24,160 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:11:24,161 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:11:24,184 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:11:24,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 159 transitions, 336 flow [2023-01-27 19:11:24,214 INFO L130 PetriNetUnfolder]: 43/323 cut-off events. [2023-01-27 19:11:24,214 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:11:24,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 323 events. 43/323 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1108 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 209. Up to 9 conditions per place. [2023-01-27 19:11:24,217 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 159 transitions, 336 flow [2023-01-27 19:11:24,218 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 159 transitions, 336 flow [2023-01-27 19:11:24,219 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:11:24,219 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 159 transitions, 336 flow [2023-01-27 19:11:24,219 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 159 transitions, 336 flow [2023-01-27 19:11:24,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 159 transitions, 336 flow [2023-01-27 19:11:24,244 INFO L130 PetriNetUnfolder]: 43/323 cut-off events. [2023-01-27 19:11:24,244 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:11:24,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 323 events. 43/323 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1108 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 209. Up to 9 conditions per place. [2023-01-27 19:11:24,251 INFO L119 LiptonReduction]: Number of co-enabled transitions 7320 [2023-01-27 19:11:27,136 INFO L134 LiptonReduction]: Checked pairs total: 11783 [2023-01-27 19:11:27,137 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-01-27 19:11:27,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:11:27,140 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;@2f39ebd3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:11:27,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 19:11:27,142 INFO L130 PetriNetUnfolder]: 6/26 cut-off events. [2023-01-27 19:11:27,143 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:11:27,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:27,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:11:27,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:11:27,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:27,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1176334487, now seen corresponding path program 1 times [2023-01-27 19:11:27,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:27,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232942921] [2023-01-27 19:11:27,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:27,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:27,197 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 19:11:27,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:11:27,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232942921] [2023-01-27 19:11:27,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232942921] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:11:27,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:11:27,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:11:27,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688811756] [2023-01-27 19:11:27,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:11:27,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:11:27,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:11:27,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:11:27,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:11:27,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 297 [2023-01-27 19:11:27,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 47 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:27,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:11:27,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 297 [2023-01-27 19:11:27,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:11:27,444 INFO L130 PetriNetUnfolder]: 1755/2921 cut-off events. [2023-01-27 19:11:27,444 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-01-27 19:11:27,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5818 conditions, 2921 events. 1755/2921 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 14505 event pairs, 731 based on Foata normal form. 100/2494 useless extension candidates. Maximal degree in co-relation 2292. Up to 1793 conditions per place. [2023-01-27 19:11:27,457 INFO L137 encePairwiseOnDemand]: 283/297 looper letters, 45 selfloop transitions, 2 changer transitions 6/57 dead transitions. [2023-01-27 19:11:27,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 57 transitions, 244 flow [2023-01-27 19:11:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:11:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:11:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-01-27 19:11:27,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5207631874298541 [2023-01-27 19:11:27,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-01-27 19:11:27,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-01-27 19:11:27,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:11:27,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-01-27 19:11:27,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:27,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:27,463 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:27,463 INFO L175 Difference]: Start difference. First operand has 38 places, 47 transitions, 112 flow. Second operand 3 states and 464 transitions. [2023-01-27 19:11:27,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 57 transitions, 244 flow [2023-01-27 19:11:27,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 244 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:11:27,474 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 106 flow [2023-01-27 19:11:27,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-01-27 19:11:27,475 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-01-27 19:11:27,475 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 106 flow [2023-01-27 19:11:27,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:27,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:27,476 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 19:11:27,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:11:27,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:11:27,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:27,477 INFO L85 PathProgramCache]: Analyzing trace with hash -661544501, now seen corresponding path program 1 times [2023-01-27 19:11:27,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:27,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843336263] [2023-01-27 19:11:27,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:27,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:27,512 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:11:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:27,535 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:11:27,535 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:11:27,535 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 19:11:27,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 19:11:27,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 19:11:27,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 19:11:27,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 19:11:27,536 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:11:27,537 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:11:27,537 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:11:27,560 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:11:27,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 181 transitions, 392 flow [2023-01-27 19:11:27,605 INFO L130 PetriNetUnfolder]: 65/470 cut-off events. [2023-01-27 19:11:27,605 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:11:27,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 470 events. 65/470 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1841 event pairs, 1 based on Foata normal form. 0/398 useless extension candidates. Maximal degree in co-relation 331. Up to 16 conditions per place. [2023-01-27 19:11:27,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 181 transitions, 392 flow [2023-01-27 19:11:27,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 181 transitions, 392 flow [2023-01-27 19:11:27,611 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:11:27,611 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 181 transitions, 392 flow [2023-01-27 19:11:27,611 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 181 transitions, 392 flow [2023-01-27 19:11:27,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 181 transitions, 392 flow [2023-01-27 19:11:27,654 INFO L130 PetriNetUnfolder]: 65/470 cut-off events. [2023-01-27 19:11:27,654 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:11:27,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 470 events. 65/470 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1841 event pairs, 1 based on Foata normal form. 0/398 useless extension candidates. Maximal degree in co-relation 331. Up to 16 conditions per place. [2023-01-27 19:11:27,668 INFO L119 LiptonReduction]: Number of co-enabled transitions 12360 [2023-01-27 19:11:30,500 INFO L134 LiptonReduction]: Checked pairs total: 20764 [2023-01-27 19:11:30,500 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-01-27 19:11:30,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:11:30,503 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;@2f39ebd3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:11:30,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 19:11:30,505 INFO L130 PetriNetUnfolder]: 6/26 cut-off events. [2023-01-27 19:11:30,505 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:11:30,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:30,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:11:30,506 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:11:30,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:30,506 INFO L85 PathProgramCache]: Analyzing trace with hash 851760893, now seen corresponding path program 1 times [2023-01-27 19:11:30,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:30,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438836240] [2023-01-27 19:11:30,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:30,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:30,552 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 19:11:30,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:11:30,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438836240] [2023-01-27 19:11:30,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438836240] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:11:30,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:11:30,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:11:30,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863871420] [2023-01-27 19:11:30,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:11:30,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:11:30,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:11:30,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:11:30,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:11:30,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 337 [2023-01-27 19:11:30,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 59 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:30,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:11:30,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 337 [2023-01-27 19:11:30,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:11:32,315 INFO L130 PetriNetUnfolder]: 15543/22667 cut-off events. [2023-01-27 19:11:32,316 INFO L131 PetriNetUnfolder]: For 721/721 co-relation queries the response was YES. [2023-01-27 19:11:32,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45254 conditions, 22667 events. 15543/22667 cut-off events. For 721/721 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 137526 event pairs, 6456 based on Foata normal form. 1640/20475 useless extension candidates. Maximal degree in co-relation 5826. Up to 14692 conditions per place. [2023-01-27 19:11:32,502 INFO L137 encePairwiseOnDemand]: 319/337 looper letters, 56 selfloop transitions, 2 changer transitions 7/70 dead transitions. [2023-01-27 19:11:32,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 309 flow [2023-01-27 19:11:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:11:32,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:11:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-01-27 19:11:32,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222551928783383 [2023-01-27 19:11:32,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-01-27 19:11:32,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-01-27 19:11:32,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:11:32,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-01-27 19:11:32,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:32,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:32,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:32,508 INFO L175 Difference]: Start difference. First operand has 48 places, 59 transitions, 148 flow. Second operand 3 states and 528 transitions. [2023-01-27 19:11:32,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 309 flow [2023-01-27 19:11:32,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 309 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:11:32,513 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 136 flow [2023-01-27 19:11:32,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-01-27 19:11:32,515 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2023-01-27 19:11:32,515 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 136 flow [2023-01-27 19:11:32,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:32,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:32,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:11:32,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:11:32,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:11:32,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:32,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2028866408, now seen corresponding path program 1 times [2023-01-27 19:11:32,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:32,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753568359] [2023-01-27 19:11:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:32,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:32,587 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 19:11:32,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:11:32,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753568359] [2023-01-27 19:11:32,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753568359] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:11:32,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675642424] [2023-01-27 19:11:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:32,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:11:32,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:11:32,591 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 19:11:32,633 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 19:11:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:32,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:11:32,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:11:32,760 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 19:11:32,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:11:32,794 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 19:11:32,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675642424] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:11:32,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:11:32,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-27 19:11:32,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102369657] [2023-01-27 19:11:32,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:11:32,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:11:32,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:11:32,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:11:32,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-27 19:11:32,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 337 [2023-01-27 19:11:32,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 149.5) internal successors, (897), 6 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:32,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:11:32,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 337 [2023-01-27 19:11:32,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:11:33,025 INFO L130 PetriNetUnfolder]: 1312/2176 cut-off events. [2023-01-27 19:11:33,026 INFO L131 PetriNetUnfolder]: For 635/635 co-relation queries the response was YES. [2023-01-27 19:11:33,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 2176 events. 1312/2176 cut-off events. For 635/635 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11281 event pairs, 0 based on Foata normal form. 0/2176 useless extension candidates. Maximal degree in co-relation 4810. Up to 1248 conditions per place. [2023-01-27 19:11:33,036 INFO L137 encePairwiseOnDemand]: 334/337 looper letters, 48 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-01-27 19:11:33,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 55 transitions, 238 flow [2023-01-27 19:11:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:11:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:11:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 938 transitions. [2023-01-27 19:11:33,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638971315529179 [2023-01-27 19:11:33,039 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 938 transitions. [2023-01-27 19:11:33,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 938 transitions. [2023-01-27 19:11:33,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:11:33,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 938 transitions. [2023-01-27 19:11:33,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.33333333333334) internal successors, (938), 6 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:33,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 337.0) internal successors, (2359), 7 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:33,046 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 337.0) internal successors, (2359), 7 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:33,046 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 136 flow. Second operand 6 states and 938 transitions. [2023-01-27 19:11:33,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 55 transitions, 238 flow [2023-01-27 19:11:33,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 230 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-27 19:11:33,049 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 74 flow [2023-01-27 19:11:33,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=74, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-01-27 19:11:33,050 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -12 predicate places. [2023-01-27 19:11:33,050 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 74 flow [2023-01-27 19:11:33,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.5) internal successors, (897), 6 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:33,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:33,051 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 19:11:33,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 19:11:33,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-27 19:11:33,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:11:33,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:33,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1292801290, now seen corresponding path program 1 times [2023-01-27 19:11:33,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:33,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702512928] [2023-01-27 19:11:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:33,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:33,276 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:11:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:33,298 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:11:33,298 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:11:33,298 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 19:11:33,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 19:11:33,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 19:11:33,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 19:11:33,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 19:11:33,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 19:11:33,299 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:11:33,299 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:11:33,300 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:11:33,321 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:11:33,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 203 transitions, 450 flow [2023-01-27 19:11:33,381 INFO L130 PetriNetUnfolder]: 99/681 cut-off events. [2023-01-27 19:11:33,382 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:11:33,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 681 events. 99/681 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2931 event pairs, 6 based on Foata normal form. 0/578 useless extension candidates. Maximal degree in co-relation 490. Up to 32 conditions per place. [2023-01-27 19:11:33,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 203 transitions, 450 flow [2023-01-27 19:11:33,390 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 203 transitions, 450 flow [2023-01-27 19:11:33,390 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:11:33,390 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 203 transitions, 450 flow [2023-01-27 19:11:33,391 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 203 transitions, 450 flow [2023-01-27 19:11:33,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 203 transitions, 450 flow [2023-01-27 19:11:33,445 INFO L130 PetriNetUnfolder]: 99/681 cut-off events. [2023-01-27 19:11:33,445 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:11:33,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 681 events. 99/681 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2931 event pairs, 6 based on Foata normal form. 0/578 useless extension candidates. Maximal degree in co-relation 490. Up to 32 conditions per place. [2023-01-27 19:11:33,468 INFO L119 LiptonReduction]: Number of co-enabled transitions 18320 [2023-01-27 19:11:36,809 INFO L134 LiptonReduction]: Checked pairs total: 35645 [2023-01-27 19:11:36,809 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-01-27 19:11:36,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:11:36,811 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;@2f39ebd3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:11:36,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 19:11:36,813 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2023-01-27 19:11:36,813 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:11:36,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:36,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:11:36,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:11:36,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:36,814 INFO L85 PathProgramCache]: Analyzing trace with hash -228108692, now seen corresponding path program 1 times [2023-01-27 19:11:36,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:36,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242683629] [2023-01-27 19:11:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:36,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:36,851 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 19:11:36,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:11:36,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242683629] [2023-01-27 19:11:36,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242683629] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:11:36,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:11:36,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:11:36,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662527480] [2023-01-27 19:11:36,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:11:36,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:11:36,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:11:36,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:11:36,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:11:36,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 377 [2023-01-27 19:11:36,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 71 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:36,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:11:36,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 377 [2023-01-27 19:11:36,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:11:48,044 INFO L130 PetriNetUnfolder]: 132302/183471 cut-off events. [2023-01-27 19:11:48,045 INFO L131 PetriNetUnfolder]: For 7370/7370 co-relation queries the response was YES. [2023-01-27 19:11:48,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364274 conditions, 183471 events. 132302/183471 cut-off events. For 7370/7370 co-relation queries the response was YES. Maximal size of possible extension queue 5142. Compared 1319581 event pairs, 58795 based on Foata normal form. 20324/171149 useless extension candidates. Maximal degree in co-relation 47736. Up to 113276 conditions per place. [2023-01-27 19:11:49,076 INFO L137 encePairwiseOnDemand]: 352/377 looper letters, 77 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2023-01-27 19:11:49,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 88 transitions, 394 flow [2023-01-27 19:11:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:11:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:11:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 600 transitions. [2023-01-27 19:11:49,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5305039787798409 [2023-01-27 19:11:49,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 600 transitions. [2023-01-27 19:11:49,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 600 transitions. [2023-01-27 19:11:49,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:11:49,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 600 transitions. [2023-01-27 19:11:49,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:49,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:49,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:49,084 INFO L175 Difference]: Start difference. First operand has 58 places, 71 transitions, 186 flow. Second operand 3 states and 600 transitions. [2023-01-27 19:11:49,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 88 transitions, 394 flow [2023-01-27 19:11:49,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 88 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:11:49,090 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 190 flow [2023-01-27 19:11:49,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-01-27 19:11:49,091 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-01-27 19:11:49,091 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 190 flow [2023-01-27 19:11:49,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:49,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:49,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:11:49,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 19:11:49,092 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:11:49,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:49,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2080769631, now seen corresponding path program 1 times [2023-01-27 19:11:49,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:49,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112925970] [2023-01-27 19:11:49,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:49,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:49,129 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 19:11:49,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:11:49,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112925970] [2023-01-27 19:11:49,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112925970] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:11:49,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446818300] [2023-01-27 19:11:49,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:49,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:11:49,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:11:49,133 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 19:11:49,136 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 19:11:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:49,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:11:49,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:11:49,250 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 19:11:49,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:11:49,266 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 19:11:49,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446818300] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:11:49,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:11:49,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:11:49,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328950922] [2023-01-27 19:11:49,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:11:49,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:11:49,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:11:49,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:11:49,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:11:49,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 377 [2023-01-27 19:11:49,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 190 flow. Second operand has 7 states, 7 states have (on average 165.85714285714286) internal successors, (1161), 7 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:49,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:11:49,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 377 [2023-01-27 19:11:49,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:11:58,757 INFO L130 PetriNetUnfolder]: 121992/168887 cut-off events. [2023-01-27 19:11:58,757 INFO L131 PetriNetUnfolder]: For 29796/29796 co-relation queries the response was YES. [2023-01-27 19:11:59,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370145 conditions, 168887 events. 121992/168887 cut-off events. For 29796/29796 co-relation queries the response was YES. Maximal size of possible extension queue 4832. Compared 1211485 event pairs, 21764 based on Foata normal form. 0/153824 useless extension candidates. Maximal degree in co-relation 84596. Up to 155017 conditions per place. [2023-01-27 19:11:59,626 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 96 selfloop transitions, 6 changer transitions 0/109 dead transitions. [2023-01-27 19:11:59,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 109 transitions, 502 flow [2023-01-27 19:11:59,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:11:59,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:11:59,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1081 transitions. [2023-01-27 19:11:59,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47789566755083995 [2023-01-27 19:11:59,629 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1081 transitions. [2023-01-27 19:11:59,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1081 transitions. [2023-01-27 19:11:59,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:11:59,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1081 transitions. [2023-01-27 19:11:59,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.16666666666666) internal successors, (1081), 6 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:59,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:59,637 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:59,637 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 190 flow. Second operand 6 states and 1081 transitions. [2023-01-27 19:11:59,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 109 transitions, 502 flow [2023-01-27 19:11:59,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 109 transitions, 494 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 19:11:59,693 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 224 flow [2023-01-27 19:11:59,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2023-01-27 19:11:59,693 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2023-01-27 19:11:59,693 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 224 flow [2023-01-27 19:11:59,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.85714285714286) internal successors, (1161), 7 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:59,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:59,694 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 19:11:59,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 19:11:59,895 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,SelfDestructingSolverStorable8 [2023-01-27 19:11:59,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:11:59,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:59,896 INFO L85 PathProgramCache]: Analyzing trace with hash 2005753740, now seen corresponding path program 1 times [2023-01-27 19:11:59,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:59,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628219633] [2023-01-27 19:11:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:59,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:59,916 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:11:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:59,942 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:11:59,942 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:11:59,943 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-01-27 19:11:59,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-27 19:11:59,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-27 19:11:59,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 19:11:59,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 19:11:59,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 19:11:59,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 19:11:59,944 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:11:59,945 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:11:59,945 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 19:11:59,974 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-27 19:11:59,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 225 transitions, 510 flow [2023-01-27 19:12:00,085 INFO L130 PetriNetUnfolder]: 161/1024 cut-off events. [2023-01-27 19:12:00,085 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:12:00,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 1024 events. 161/1024 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4926 event pairs, 23 based on Foata normal form. 0/874 useless extension candidates. Maximal degree in co-relation 726. Up to 80 conditions per place. [2023-01-27 19:12:00,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 225 transitions, 510 flow [2023-01-27 19:12:00,101 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 225 transitions, 510 flow [2023-01-27 19:12:00,101 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:12:00,101 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 205 places, 225 transitions, 510 flow [2023-01-27 19:12:00,101 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 205 places, 225 transitions, 510 flow [2023-01-27 19:12:00,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 225 transitions, 510 flow [2023-01-27 19:12:00,204 INFO L130 PetriNetUnfolder]: 161/1024 cut-off events. [2023-01-27 19:12:00,205 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:12:00,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 1024 events. 161/1024 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4926 event pairs, 23 based on Foata normal form. 0/874 useless extension candidates. Maximal degree in co-relation 726. Up to 80 conditions per place. [2023-01-27 19:12:00,233 INFO L119 LiptonReduction]: Number of co-enabled transitions 25200 [2023-01-27 19:12:03,485 INFO L134 LiptonReduction]: Checked pairs total: 51265 [2023-01-27 19:12:03,485 INFO L136 LiptonReduction]: Total number of compositions: 190 [2023-01-27 19:12:03,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:12:03,487 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;@2f39ebd3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:12:03,487 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 19:12:03,489 INFO L130 PetriNetUnfolder]: 8/31 cut-off events. [2023-01-27 19:12:03,489 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:12:03,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:12:03,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:12:03,489 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 19:12:03,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:12:03,489 INFO L85 PathProgramCache]: Analyzing trace with hash -190198204, now seen corresponding path program 1 times [2023-01-27 19:12:03,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:12:03,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675580178] [2023-01-27 19:12:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:12:03,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:12:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:12:03,535 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 19:12:03,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:12:03,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675580178] [2023-01-27 19:12:03,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675580178] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:12:03,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:12:03,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:12:03,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953336164] [2023-01-27 19:12:03,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:12:03,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:12:03,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:12:03,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:12:03,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:12:03,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 415 [2023-01-27 19:12:03,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 83 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:12:03,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:12:03,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 415 [2023-01-27 19:12:03,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:14:05,059 INFO L130 PetriNetUnfolder]: 1236886/1576681 cut-off events. [2023-01-27 19:14:05,059 INFO L131 PetriNetUnfolder]: For 68644/68644 co-relation queries the response was YES. [2023-01-27 19:14:09,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3164009 conditions, 1576681 events. 1236886/1576681 cut-off events. For 68644/68644 co-relation queries the response was YES. Maximal size of possible extension queue 29530. Compared 11038013 event pairs, 475757 based on Foata normal form. 151424/1450403 useless extension candidates. Maximal degree in co-relation 370203. Up to 1160270 conditions per place. [2023-01-27 19:14:16,503 INFO L137 encePairwiseOnDemand]: 388/415 looper letters, 81 selfloop transitions, 2 changer transitions 9/98 dead transitions. [2023-01-27 19:14:16,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 98 transitions, 455 flow [2023-01-27 19:14:16,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:14:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:14:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2023-01-27 19:14:16,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5293172690763053 [2023-01-27 19:14:16,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2023-01-27 19:14:16,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2023-01-27 19:14:16,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:14:16,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2023-01-27 19:14:16,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:16,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:16,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:16,516 INFO L175 Difference]: Start difference. First operand has 68 places, 83 transitions, 226 flow. Second operand 3 states and 659 transitions. [2023-01-27 19:14:16,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 98 transitions, 455 flow [2023-01-27 19:14:16,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 98 transitions, 455 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:14:16,529 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 206 flow [2023-01-27 19:14:16,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2023-01-27 19:14:16,530 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2023-01-27 19:14:16,530 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 206 flow [2023-01-27 19:14:16,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:16,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:14:16,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:14:16,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 19:14:16,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 19:14:16,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:14:16,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1429629134, now seen corresponding path program 1 times [2023-01-27 19:14:16,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:14:16,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154109918] [2023-01-27 19:14:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:16,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:14:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:14:16,626 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 19:14:16,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:14:16,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154109918] [2023-01-27 19:14:16,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154109918] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:14:16,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893323471] [2023-01-27 19:14:16,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:16,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:14:16,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:14:16,649 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 19:14:16,705 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 19:14:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:14:16,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:14:16,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:14:16,819 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 19:14:16,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:14:16,848 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 19:14:16,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893323471] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:14:16,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:14:16,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:14:16,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54483954] [2023-01-27 19:14:16,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:14:16,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:14:16,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:14:16,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:14:16,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:14:16,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 415 [2023-01-27 19:14:16,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 206 flow. Second operand has 7 states, 7 states have (on average 181.85714285714286) internal successors, (1273), 7 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:16,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:14:16,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 415 [2023-01-27 19:14:16,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand