/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_77-tricky_address4_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:22:52,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:22:52,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:22:52,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:22:52,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:22:52,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:22:52,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:22:52,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:22:52,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:22:52,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:22:52,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:22:52,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:22:52,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:22:52,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:22:52,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:22:52,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:22:52,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:22:52,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:22:52,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:22:52,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:22:52,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:22:52,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:22:52,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:22:52,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:22:52,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:22:52,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:22:52,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:22:52,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:22:52,603 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 19:22:52,628 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:22:52,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:22:52,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:22:52,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:22:52,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:22:52,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:22:52,630 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:22:52,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:22:52,631 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:22:52,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:22:52,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:22:52,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:22:52,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:22:52,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:22:52,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:22:52,632 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:22:52,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:22:52,632 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:22:52,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:22:52,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:22:52,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:22:52,633 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:22:52,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:22:52,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:22:52,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:22:52,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:22:52,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:22:52,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:22:52,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:22:52,634 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:22:52,634 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:22:52,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:22:52,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:22:52,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:22:52,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:22:52,859 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:22:52,859 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:22:52,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-01-27 19:22:53,818 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:22:54,011 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:22:54,011 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-01-27 19:22:54,032 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1d945eb1/79b8b5908cc546a5a21ae48115a3f351/FLAGb3b4c7a43 [2023-01-27 19:22:54,044 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1d945eb1/79b8b5908cc546a5a21ae48115a3f351 [2023-01-27 19:22:54,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:22:54,047 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:22:54,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:22:54,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:22:54,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:22:54,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:22:54" (1/1) ... [2023-01-27 19:22:54,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59ac36c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:54, skipping insertion in model container [2023-01-27 19:22:54,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:22:54" (1/1) ... [2023-01-27 19:22:54,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:22:54,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:22:54,412 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_77-tricky_address4_racing.i[41323,41336] [2023-01-27 19:22:54,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:22:54,452 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:22:54,478 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_77-tricky_address4_racing.i[41323,41336] [2023-01-27 19:22:54,486 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:22:54,527 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:22:54,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:54 WrapperNode [2023-01-27 19:22:54,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:22:54,528 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:22:54,528 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:22:54,528 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:22:54,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:54" (1/1) ... [2023-01-27 19:22:54,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:54" (1/1) ... [2023-01-27 19:22:54,572 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 193 [2023-01-27 19:22:54,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:22:54,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:22:54,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:22:54,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:22:54,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:54" (1/1) ... [2023-01-27 19:22:54,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:54" (1/1) ... [2023-01-27 19:22:54,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:54" (1/1) ... [2023-01-27 19:22:54,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:54" (1/1) ... [2023-01-27 19:22:54,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:54" (1/1) ... [2023-01-27 19:22:54,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:54" (1/1) ... [2023-01-27 19:22:54,593 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:54" (1/1) ... [2023-01-27 19:22:54,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:54" (1/1) ... [2023-01-27 19:22:54,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:22:54,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:22:54,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:22:54,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:22:54,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:54" (1/1) ... [2023-01-27 19:22:54,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:22:54,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:22:54,626 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 19:22:54,632 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 19:22:54,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:22:54,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:22:54,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:22:54,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:22:54,652 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:22:54,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:22:54,652 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:22:54,652 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:22:54,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:22:54,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:22:54,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:22:54,653 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 19:22:54,742 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:22:54,744 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:22:55,005 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:22:55,011 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:22:55,011 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-01-27 19:22:55,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:22:55 BoogieIcfgContainer [2023-01-27 19:22:55,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:22:55,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:22:55,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:22:55,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:22:55,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:22:54" (1/3) ... [2023-01-27 19:22:55,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c56a93d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:22:55, skipping insertion in model container [2023-01-27 19:22:55,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:54" (2/3) ... [2023-01-27 19:22:55,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c56a93d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:22:55, skipping insertion in model container [2023-01-27 19:22:55,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:22:55" (3/3) ... [2023-01-27 19:22:55,018 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2023-01-27 19:22:55,029 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:22:55,030 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-27 19:22:55,030 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:22:55,089 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:22:55,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 193 transitions, 394 flow [2023-01-27 19:22:55,164 INFO L130 PetriNetUnfolder]: 45/263 cut-off events. [2023-01-27 19:22:55,164 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-01-27 19:22:55,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 263 events. 45/263 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 814 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-01-27 19:22:55,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 193 transitions, 394 flow [2023-01-27 19:22:55,178 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 188 transitions, 381 flow [2023-01-27 19:22:55,181 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:22:55,187 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 188 transitions, 381 flow [2023-01-27 19:22:55,189 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 188 transitions, 381 flow [2023-01-27 19:22:55,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 188 transitions, 381 flow [2023-01-27 19:22:55,223 INFO L130 PetriNetUnfolder]: 44/258 cut-off events. [2023-01-27 19:22:55,223 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:22:55,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 258 events. 44/258 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 778 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-01-27 19:22:55,228 INFO L119 LiptonReduction]: Number of co-enabled transitions 10792 [2023-01-27 19:22:57,509 INFO L134 LiptonReduction]: Checked pairs total: 17790 [2023-01-27 19:22:57,509 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-01-27 19:22:57,520 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:22:57,524 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;@1ea4f40a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:22:57,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 19:22:57,529 INFO L130 PetriNetUnfolder]: 5/27 cut-off events. [2023-01-27 19:22:57,529 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:22:57,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:57,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:22:57,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:22:57,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:57,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1355205613, now seen corresponding path program 1 times [2023-01-27 19:22:57,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:57,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287433755] [2023-01-27 19:22:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:57,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:57,703 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 19:22:57,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:57,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287433755] [2023-01-27 19:22:57,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287433755] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:22:57,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:22:57,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:22:57,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473019401] [2023-01-27 19:22:57,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:22:57,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:22:57,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:57,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:22:57,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:22:57,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 357 [2023-01-27 19:22:57,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:57,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:57,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 357 [2023-01-27 19:22:57,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:57,817 INFO L130 PetriNetUnfolder]: 272/614 cut-off events. [2023-01-27 19:22:57,818 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:22:57,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 614 events. 272/614 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3057 event pairs, 238 based on Foata normal form. 118/640 useless extension candidates. Maximal degree in co-relation 1094. Up to 528 conditions per place. [2023-01-27 19:22:57,821 INFO L137 encePairwiseOnDemand]: 332/357 looper letters, 34 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-01-27 19:22:57,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 167 flow [2023-01-27 19:22:57,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:22:57,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:22:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-01-27 19:22:57,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4892623716153128 [2023-01-27 19:22:57,831 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-01-27 19:22:57,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-01-27 19:22:57,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:57,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-01-27 19:22:57,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:57,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:57,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:57,842 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 524 transitions. [2023-01-27 19:22:57,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 167 flow [2023-01-27 19:22:57,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:22:57,845 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 105 flow [2023-01-27 19:22:57,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-01-27 19:22:57,848 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-01-27 19:22:57,848 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 105 flow [2023-01-27 19:22:57,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:57,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:57,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:22:57,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:22:57,849 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:22:57,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:57,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1202044733, now seen corresponding path program 1 times [2023-01-27 19:22:57,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:57,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069497761] [2023-01-27 19:22:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:57,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:57,922 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 19:22:57,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:57,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069497761] [2023-01-27 19:22:57,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069497761] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:22:57,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938651294] [2023-01-27 19:22:57,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:57,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:57,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:22:57,925 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 19:22:57,951 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 19:22:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:57,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-01-27 19:22:57,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:22:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:22:58,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:22:58,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938651294] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:22:58,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:22:58,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-27 19:22:58,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884492861] [2023-01-27 19:22:58,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:22:58,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:22:58,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:58,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:22:58,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:22:58,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 357 [2023-01-27 19:22:58,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:58,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:58,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 357 [2023-01-27 19:22:58,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:58,074 INFO L130 PetriNetUnfolder]: 255/592 cut-off events. [2023-01-27 19:22:58,074 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:22:58,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 592 events. 255/592 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3266 event pairs, 0 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 1120. Up to 497 conditions per place. [2023-01-27 19:22:58,077 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 49 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-01-27 19:22:58,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 237 flow [2023-01-27 19:22:58,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:22:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:22:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-01-27 19:22:58,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48179271708683474 [2023-01-27 19:22:58,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-01-27 19:22:58,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-01-27 19:22:58,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:58,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-01-27 19:22:58,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:58,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:58,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:58,082 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 105 flow. Second operand 3 states and 516 transitions. [2023-01-27 19:22:58,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 237 flow [2023-01-27 19:22:58,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 233 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:22:58,084 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 109 flow [2023-01-27 19:22:58,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-01-27 19:22:58,084 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2023-01-27 19:22:58,084 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 109 flow [2023-01-27 19:22:58,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:58,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:58,085 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-27 19:22:58,094 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 19:22:58,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:58,290 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:22:58,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:58,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1382333179, now seen corresponding path program 1 times [2023-01-27 19:22:58,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:58,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260520965] [2023-01-27 19:22:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:58,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:22:58,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:58,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260520965] [2023-01-27 19:22:58,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260520965] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:22:58,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397319305] [2023-01-27 19:22:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:58,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:58,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:22:58,361 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 19:22:58,376 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 19:22:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:58,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:22:58,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:22:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:22:58,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:22:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:22:58,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397319305] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:22:58,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:22:58,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:22:58,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124664347] [2023-01-27 19:22:58,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:22:58,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:22:58,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:22:58,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:22:58,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 357 [2023-01-27 19:22:58,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 109 flow. Second operand has 7 states, 7 states have (on average 156.57142857142858) internal successors, (1096), 7 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:58,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:58,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 357 [2023-01-27 19:22:58,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:58,641 INFO L130 PetriNetUnfolder]: 271/599 cut-off events. [2023-01-27 19:22:58,641 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2023-01-27 19:22:58,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1176 conditions, 599 events. 271/599 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2938 event pairs, 238 based on Foata normal form. 3/529 useless extension candidates. Maximal degree in co-relation 1149. Up to 513 conditions per place. [2023-01-27 19:22:58,643 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 34 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-01-27 19:22:58,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 199 flow [2023-01-27 19:22:58,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:22:58,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:22:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 972 transitions. [2023-01-27 19:22:58,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453781512605042 [2023-01-27 19:22:58,645 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 972 transitions. [2023-01-27 19:22:58,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 972 transitions. [2023-01-27 19:22:58,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:58,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 972 transitions. [2023-01-27 19:22:58,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 162.0) internal successors, (972), 6 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:58,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:58,651 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:58,652 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 109 flow. Second operand 6 states and 972 transitions. [2023-01-27 19:22:58,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 199 flow [2023-01-27 19:22:58,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 195 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 19:22:58,654 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 141 flow [2023-01-27 19:22:58,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=141, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-01-27 19:22:58,655 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2023-01-27 19:22:58,655 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 141 flow [2023-01-27 19:22:58,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 156.57142857142858) internal successors, (1096), 7 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:58,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:58,656 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-01-27 19:22:58,663 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 19:22:58,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-01-27 19:22:58,861 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:22:58,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:58,862 INFO L85 PathProgramCache]: Analyzing trace with hash 941146001, now seen corresponding path program 2 times [2023-01-27 19:22:58,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:58,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749978056] [2023-01-27 19:22:58,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:58,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:22:58,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:58,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749978056] [2023-01-27 19:22:58,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749978056] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:22:58,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003795801] [2023-01-27 19:22:58,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:22:58,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:58,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:22:58,994 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 19:22:59,005 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 19:22:59,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:22:59,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:22:59,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 19:22:59,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:22:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:22:59,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:22:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:22:59,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003795801] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:22:59,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:22:59,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 19:22:59,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678313469] [2023-01-27 19:22:59,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:22:59,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 19:22:59,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:59,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 19:22:59,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-27 19:22:59,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 357 [2023-01-27 19:22:59,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 141 flow. Second operand has 13 states, 13 states have (on average 156.30769230769232) internal successors, (2032), 13 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:59,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:59,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 357 [2023-01-27 19:22:59,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:59,287 INFO L130 PetriNetUnfolder]: 270/602 cut-off events. [2023-01-27 19:22:59,288 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-01-27 19:22:59,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 602 events. 270/602 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2934 event pairs, 238 based on Foata normal form. 6/536 useless extension candidates. Maximal degree in co-relation 1138. Up to 513 conditions per place. [2023-01-27 19:22:59,289 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 34 selfloop transitions, 11 changer transitions 0/54 dead transitions. [2023-01-27 19:22:59,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 267 flow [2023-01-27 19:22:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 19:22:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 19:22:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1911 transitions. [2023-01-27 19:22:59,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44607843137254904 [2023-01-27 19:22:59,293 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1911 transitions. [2023-01-27 19:22:59,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1911 transitions. [2023-01-27 19:22:59,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:59,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1911 transitions. [2023-01-27 19:22:59,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.25) internal successors, (1911), 12 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:59,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 357.0) internal successors, (4641), 13 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:59,302 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 357.0) internal successors, (4641), 13 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:59,302 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 141 flow. Second operand 12 states and 1911 transitions. [2023-01-27 19:22:59,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 267 flow [2023-01-27 19:22:59,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 54 transitions, 253 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:22:59,304 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 211 flow [2023-01-27 19:22:59,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=211, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2023-01-27 19:22:59,305 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2023-01-27 19:22:59,305 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 211 flow [2023-01-27 19:22:59,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 156.30769230769232) internal successors, (2032), 13 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:59,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:59,306 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-01-27 19:22:59,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 19:22:59,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:59,511 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:22:59,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:59,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1854023505, now seen corresponding path program 3 times [2023-01-27 19:22:59,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:59,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129964288] [2023-01-27 19:22:59,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:59,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:22:59,534 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:22:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:22:59,564 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:22:59,565 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:22:59,566 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 19:22:59,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 19:22:59,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 19:22:59,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 19:22:59,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:22:59,568 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-01-27 19:22:59,569 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:22:59,569 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:22:59,600 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:22:59,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-01-27 19:22:59,641 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-01-27 19:22:59,642 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-27 19:22:59,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 430 events. 75/430 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1680 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-01-27 19:22:59,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 266 transitions, 550 flow [2023-01-27 19:22:59,646 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 266 transitions, 550 flow [2023-01-27 19:22:59,646 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:22:59,646 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 266 transitions, 550 flow [2023-01-27 19:22:59,647 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 266 transitions, 550 flow [2023-01-27 19:22:59,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-01-27 19:22:59,678 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-01-27 19:22:59,679 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-27 19:22:59,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 430 events. 75/430 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1680 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-01-27 19:22:59,692 INFO L119 LiptonReduction]: Number of co-enabled transitions 33228 [2023-01-27 19:23:01,873 INFO L134 LiptonReduction]: Checked pairs total: 56804 [2023-01-27 19:23:01,873 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-01-27 19:23:01,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:23:01,878 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;@1ea4f40a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:23:01,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 19:23:01,880 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2023-01-27 19:23:01,880 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:23:01,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:01,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:23:01,881 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:23:01,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:01,881 INFO L85 PathProgramCache]: Analyzing trace with hash 685324257, now seen corresponding path program 1 times [2023-01-27 19:23:01,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:01,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399675916] [2023-01-27 19:23:01,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:01,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:01,915 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 19:23:01,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:23:01,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399675916] [2023-01-27 19:23:01,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399675916] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:23:01,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:23:01,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:23:01,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155974460] [2023-01-27 19:23:01,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:23:01,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:23:01,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:23:01,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:23:01,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:23:01,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 485 [2023-01-27 19:23:01,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 101 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:01,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:23:01,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 485 [2023-01-27 19:23:01,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:23:02,971 INFO L130 PetriNetUnfolder]: 10559/16533 cut-off events. [2023-01-27 19:23:02,972 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-01-27 19:23:02,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32068 conditions, 16533 events. 10559/16533 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 109159 event pairs, 9818 based on Foata normal form. 2499/16469 useless extension candidates. Maximal degree in co-relation 13984. Up to 15431 conditions per place. [2023-01-27 19:23:03,029 INFO L137 encePairwiseOnDemand]: 450/485 looper letters, 56 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-01-27 19:23:03,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 274 flow [2023-01-27 19:23:03,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:23:03,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:23:03,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2023-01-27 19:23:03,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017182130584192 [2023-01-27 19:23:03,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2023-01-27 19:23:03,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2023-01-27 19:23:03,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:23:03,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2023-01-27 19:23:03,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:03,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:03,038 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:03,038 INFO L175 Difference]: Start difference. First operand has 68 places, 101 transitions, 220 flow. Second operand 3 states and 730 transitions. [2023-01-27 19:23:03,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 274 flow [2023-01-27 19:23:03,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:23:03,040 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 168 flow [2023-01-27 19:23:03,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2023-01-27 19:23:03,042 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-01-27 19:23:03,043 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 168 flow [2023-01-27 19:23:03,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:03,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:03,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:23:03,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:23:03,043 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:23:03,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:03,044 INFO L85 PathProgramCache]: Analyzing trace with hash -909660943, now seen corresponding path program 1 times [2023-01-27 19:23:03,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:03,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150620642] [2023-01-27 19:23:03,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:03,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:03,078 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 19:23:03,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:23:03,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150620642] [2023-01-27 19:23:03,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150620642] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:23:03,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645366906] [2023-01-27 19:23:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:03,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:23:03,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:23:03,080 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:23:03,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 19:23:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:03,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-01-27 19:23:03,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:23:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:23:03,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:23:03,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645366906] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:23:03,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:23:03,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-27 19:23:03,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45334845] [2023-01-27 19:23:03,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:23:03,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:23:03,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:23:03,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:23:03,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:23:03,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 485 [2023-01-27 19:23:03,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:03,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:23:03,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 485 [2023-01-27 19:23:03,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:23:04,022 INFO L130 PetriNetUnfolder]: 10416/16508 cut-off events. [2023-01-27 19:23:04,022 INFO L131 PetriNetUnfolder]: For 83/83 co-relation queries the response was YES. [2023-01-27 19:23:04,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32058 conditions, 16508 events. 10416/16508 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 111734 event pairs, 4650 based on Foata normal form. 0/13980 useless extension candidates. Maximal degree in co-relation 32045. Up to 15399 conditions per place. [2023-01-27 19:23:04,096 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 74 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-01-27 19:23:04,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 356 flow [2023-01-27 19:23:04,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:23:04,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:23:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 715 transitions. [2023-01-27 19:23:04,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49140893470790376 [2023-01-27 19:23:04,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 715 transitions. [2023-01-27 19:23:04,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 715 transitions. [2023-01-27 19:23:04,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:23:04,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 715 transitions. [2023-01-27 19:23:04,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:04,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:04,102 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:04,102 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 168 flow. Second operand 3 states and 715 transitions. [2023-01-27 19:23:04,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 356 flow [2023-01-27 19:23:04,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 352 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:23:04,107 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 176 flow [2023-01-27 19:23:04,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-01-27 19:23:04,108 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-01-27 19:23:04,109 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 176 flow [2023-01-27 19:23:04,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:04,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:04,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:23:04,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 19:23:04,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:23:04,314 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:23:04,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:04,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1710054241, now seen corresponding path program 1 times [2023-01-27 19:23:04,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:04,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100197215] [2023-01-27 19:23:04,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:04,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:04,349 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 19:23:04,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:23:04,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100197215] [2023-01-27 19:23:04,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100197215] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:23:04,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118870302] [2023-01-27 19:23:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:04,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:23:04,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:23:04,351 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:23:04,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 19:23:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:04,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:23:04,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:23:04,479 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 19:23:04,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:23:04,489 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 19:23:04,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118870302] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:23:04,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:23:04,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:23:04,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119389821] [2023-01-27 19:23:04,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:23:04,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:23:04,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:23:04,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:23:04,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:23:04,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 485 [2023-01-27 19:23:04,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 215.0) internal successors, (1505), 7 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:04,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:23:04,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 485 [2023-01-27 19:23:04,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:23:05,552 INFO L130 PetriNetUnfolder]: 10623/16504 cut-off events. [2023-01-27 19:23:05,552 INFO L131 PetriNetUnfolder]: For 685/685 co-relation queries the response was YES. [2023-01-27 19:23:05,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32633 conditions, 16504 events. 10623/16504 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 108155 event pairs, 9818 based on Foata normal form. 3/14244 useless extension candidates. Maximal degree in co-relation 32605. Up to 15417 conditions per place. [2023-01-27 19:23:05,598 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 57 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-01-27 19:23:05,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 312 flow [2023-01-27 19:23:05,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:23:05,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:23:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1342 transitions. [2023-01-27 19:23:05,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611683848797251 [2023-01-27 19:23:05,601 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1342 transitions. [2023-01-27 19:23:05,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1342 transitions. [2023-01-27 19:23:05,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:23:05,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1342 transitions. [2023-01-27 19:23:05,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 223.66666666666666) internal successors, (1342), 6 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:05,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:05,607 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:05,607 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 176 flow. Second operand 6 states and 1342 transitions. [2023-01-27 19:23:05,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 312 flow [2023-01-27 19:23:05,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:23:05,611 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 210 flow [2023-01-27 19:23:05,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-01-27 19:23:05,611 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2023-01-27 19:23:05,611 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 210 flow [2023-01-27 19:23:05,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 215.0) internal successors, (1505), 7 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:05,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:05,612 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:23:05,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 19:23:05,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:23:05,833 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:23:05,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:05,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1658605999, now seen corresponding path program 2 times [2023-01-27 19:23:05,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:05,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569209118] [2023-01-27 19:23:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:05,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:23:05,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:23:05,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569209118] [2023-01-27 19:23:05,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569209118] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:23:05,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335757301] [2023-01-27 19:23:05,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:23:05,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:23:05,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:23:05,885 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:23:05,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 19:23:06,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 19:23:06,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:23:06,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-27 19:23:06,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:23:06,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-27 19:23:06,105 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 19:23:06,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-27 19:23:06,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-27 19:23:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 19:23:06,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:23:06,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335757301] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:23:06,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:23:06,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-01-27 19:23:06,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176816144] [2023-01-27 19:23:06,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:23:06,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:23:06,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:23:06,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:23:06,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-27 19:23:06,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 485 [2023-01-27 19:23:06,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 177.5) internal successors, (1065), 6 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:06,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:23:06,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 485 [2023-01-27 19:23:06,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:23:07,453 INFO L130 PetriNetUnfolder]: 11304/17827 cut-off events. [2023-01-27 19:23:07,468 INFO L131 PetriNetUnfolder]: For 685/685 co-relation queries the response was YES. [2023-01-27 19:23:07,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35586 conditions, 17827 events. 11304/17827 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 121242 event pairs, 2905 based on Foata normal form. 0/15763 useless extension candidates. Maximal degree in co-relation 35550. Up to 13514 conditions per place. [2023-01-27 19:23:07,561 INFO L137 encePairwiseOnDemand]: 475/485 looper letters, 126 selfloop transitions, 14 changer transitions 14/165 dead transitions. [2023-01-27 19:23:07,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 165 transitions, 731 flow [2023-01-27 19:23:07,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:23:07,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:23:07,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1211 transitions. [2023-01-27 19:23:07,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161512027491409 [2023-01-27 19:23:07,568 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1211 transitions. [2023-01-27 19:23:07,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1211 transitions. [2023-01-27 19:23:07,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:23:07,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1211 transitions. [2023-01-27 19:23:07,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.83333333333334) internal successors, (1211), 6 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:07,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:07,582 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:07,582 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 210 flow. Second operand 6 states and 1211 transitions. [2023-01-27 19:23:07,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 165 transitions, 731 flow [2023-01-27 19:23:07,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 165 transitions, 717 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:23:07,588 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 293 flow [2023-01-27 19:23:07,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-01-27 19:23:07,590 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 20 predicate places. [2023-01-27 19:23:07,590 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 293 flow [2023-01-27 19:23:07,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 177.5) internal successors, (1065), 6 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:07,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:07,592 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-27 19:23:07,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 19:23:07,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:23:07,799 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:23:07,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:07,800 INFO L85 PathProgramCache]: Analyzing trace with hash -845271688, now seen corresponding path program 1 times [2023-01-27 19:23:07,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:07,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026003294] [2023-01-27 19:23:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:07,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 19:23:07,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:23:07,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026003294] [2023-01-27 19:23:07,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026003294] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:23:07,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6286650] [2023-01-27 19:23:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:07,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:23:07,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:23:07,866 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:23:07,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 19:23:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:07,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 19:23:07,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:23:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 19:23:07,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:23:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 19:23:07,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6286650] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:23:07,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:23:07,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 19:23:07,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017392811] [2023-01-27 19:23:07,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:23:07,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 19:23:07,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:23:07,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 19:23:07,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-27 19:23:07,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 485 [2023-01-27 19:23:07,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 293 flow. Second operand has 13 states, 13 states have (on average 214.3846153846154) internal successors, (2787), 13 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:07,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:23:07,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 485 [2023-01-27 19:23:07,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:23:09,290 INFO L130 PetriNetUnfolder]: 10762/17136 cut-off events. [2023-01-27 19:23:09,290 INFO L131 PetriNetUnfolder]: For 5753/5761 co-relation queries the response was YES. [2023-01-27 19:23:09,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38118 conditions, 17136 events. 10762/17136 cut-off events. For 5753/5761 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 117384 event pairs, 9444 based on Foata normal form. 6/16093 useless extension candidates. Maximal degree in co-relation 38059. Up to 16223 conditions per place. [2023-01-27 19:23:09,331 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 69 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2023-01-27 19:23:09,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 92 transitions, 489 flow [2023-01-27 19:23:09,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 19:23:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 19:23:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2629 transitions. [2023-01-27 19:23:09,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45171821305841925 [2023-01-27 19:23:09,336 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2629 transitions. [2023-01-27 19:23:09,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2629 transitions. [2023-01-27 19:23:09,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:23:09,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2629 transitions. [2023-01-27 19:23:09,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 219.08333333333334) internal successors, (2629), 12 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:09,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 485.0) internal successors, (6305), 13 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:09,348 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 485.0) internal successors, (6305), 13 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:09,348 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 293 flow. Second operand 12 states and 2629 transitions. [2023-01-27 19:23:09,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 92 transitions, 489 flow [2023-01-27 19:23:09,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 92 transitions, 489 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:23:09,359 INFO L231 Difference]: Finished difference. Result has 105 places, 92 transitions, 377 flow [2023-01-27 19:23:09,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=377, PETRI_PLACES=105, PETRI_TRANSITIONS=92} [2023-01-27 19:23:09,359 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 37 predicate places. [2023-01-27 19:23:09,359 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 92 transitions, 377 flow [2023-01-27 19:23:09,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 214.3846153846154) internal successors, (2787), 13 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:09,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:09,361 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-27 19:23:09,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 19:23:09,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:23:09,566 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:23:09,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:09,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1266609288, now seen corresponding path program 2 times [2023-01-27 19:23:09,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:09,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939277370] [2023-01-27 19:23:09,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:09,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:23:09,598 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:23:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:23:09,625 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:23:09,625 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:23:09,625 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 19:23:09,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 19:23:09,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 19:23:09,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 19:23:09,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 19:23:09,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 19:23:09,626 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-01-27 19:23:09,626 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:23:09,626 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:23:09,656 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:23:09,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 339 transitions, 708 flow [2023-01-27 19:23:09,722 INFO L130 PetriNetUnfolder]: 110/628 cut-off events. [2023-01-27 19:23:09,722 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-01-27 19:23:09,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 110/628 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2743 event pairs, 1 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 438. Up to 16 conditions per place. [2023-01-27 19:23:09,726 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 339 transitions, 708 flow [2023-01-27 19:23:09,729 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 339 transitions, 708 flow [2023-01-27 19:23:09,729 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:23:09,729 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 339 transitions, 708 flow [2023-01-27 19:23:09,729 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 339 transitions, 708 flow [2023-01-27 19:23:09,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 339 transitions, 708 flow [2023-01-27 19:23:09,778 INFO L130 PetriNetUnfolder]: 110/628 cut-off events. [2023-01-27 19:23:09,778 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-01-27 19:23:09,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 110/628 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2743 event pairs, 1 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 438. Up to 16 conditions per place. [2023-01-27 19:23:09,797 INFO L119 LiptonReduction]: Number of co-enabled transitions 65604 [2023-01-27 19:23:13,035 INFO L134 LiptonReduction]: Checked pairs total: 110294 [2023-01-27 19:23:13,036 INFO L136 LiptonReduction]: Total number of compositions: 279 [2023-01-27 19:23:13,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:23:13,037 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;@1ea4f40a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:23:13,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 19:23:13,039 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2023-01-27 19:23:13,039 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:23:13,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:13,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:23:13,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:23:13,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:13,039 INFO L85 PathProgramCache]: Analyzing trace with hash -408859945, now seen corresponding path program 1 times [2023-01-27 19:23:13,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:13,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661657966] [2023-01-27 19:23:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:13,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:13,056 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 19:23:13,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:23:13,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661657966] [2023-01-27 19:23:13,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661657966] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:23:13,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:23:13,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:23:13,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009395291] [2023-01-27 19:23:13,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:23:13,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:23:13,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:23:13,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:23:13,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:23:13,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 618 [2023-01-27 19:23:13,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:13,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:23:13,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 618 [2023-01-27 19:23:13,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:23:29,679 INFO L130 PetriNetUnfolder]: 199024/283218 cut-off events. [2023-01-27 19:23:29,680 INFO L131 PetriNetUnfolder]: For 3132/3132 co-relation queries the response was YES. [2023-01-27 19:23:30,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544637 conditions, 283218 events. 199024/283218 cut-off events. For 3132/3132 co-relation queries the response was YES. Maximal size of possible extension queue 7666. Compared 2271673 event pairs, 188343 based on Foata normal form. 51886/290674 useless extension candidates. Maximal degree in co-relation 50654. Up to 259483 conditions per place. [2023-01-27 19:23:31,217 INFO L137 encePairwiseOnDemand]: 573/618 looper letters, 69 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-01-27 19:23:31,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 352 flow [2023-01-27 19:23:31,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:23:31,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:23:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 927 transitions. [2023-01-27 19:23:31,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-01-27 19:23:31,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 927 transitions. [2023-01-27 19:23:31,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 927 transitions. [2023-01-27 19:23:31,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:23:31,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 927 transitions. [2023-01-27 19:23:31,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:31,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:31,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:31,225 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 927 transitions. [2023-01-27 19:23:31,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 352 flow [2023-01-27 19:23:31,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:23:31,229 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 220 flow [2023-01-27 19:23:31,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2023-01-27 19:23:31,229 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-01-27 19:23:31,229 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 220 flow [2023-01-27 19:23:31,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:31,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:31,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:23:31,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-27 19:23:31,230 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:23:31,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:31,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1114893743, now seen corresponding path program 1 times [2023-01-27 19:23:31,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:31,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331753719] [2023-01-27 19:23:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:31,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:31,251 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 19:23:31,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:23:31,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331753719] [2023-01-27 19:23:31,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331753719] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:23:31,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771167188] [2023-01-27 19:23:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:31,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:23:31,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:23:31,265 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:23:31,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 19:23:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:31,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-01-27 19:23:31,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:23:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:23:31,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:23:31,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771167188] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:23:31,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:23:31,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-27 19:23:31,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832818565] [2023-01-27 19:23:31,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:23:31,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:23:31,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:23:31,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:23:31,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:23:31,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 618 [2023-01-27 19:23:31,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:31,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:23:31,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 618 [2023-01-27 19:23:31,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:23:47,167 INFO L130 PetriNetUnfolder]: 199267/282410 cut-off events. [2023-01-27 19:23:47,167 INFO L131 PetriNetUnfolder]: For 3094/3094 co-relation queries the response was YES. [2023-01-27 19:23:47,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543876 conditions, 282410 events. 199267/282410 cut-off events. For 3094/3094 co-relation queries the response was YES. Maximal size of possible extension queue 7617. Compared 2244922 event pairs, 123187 based on Foata normal form. 0/238132 useless extension candidates. Maximal degree in co-relation 543862. Up to 259453 conditions per place. [2023-01-27 19:23:48,663 INFO L137 encePairwiseOnDemand]: 615/618 looper letters, 85 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-01-27 19:23:48,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 106 transitions, 426 flow [2023-01-27 19:23:48,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:23:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:23:48,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 900 transitions. [2023-01-27 19:23:48,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4854368932038835 [2023-01-27 19:23:48,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 900 transitions. [2023-01-27 19:23:48,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 900 transitions. [2023-01-27 19:23:48,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:23:48,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 900 transitions. [2023-01-27 19:23:48,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:48,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:48,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:48,670 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 220 flow. Second operand 3 states and 900 transitions. [2023-01-27 19:23:48,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 106 transitions, 426 flow [2023-01-27 19:23:48,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 106 transitions, 422 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:23:48,672 INFO L231 Difference]: Finished difference. Result has 93 places, 91 transitions, 228 flow [2023-01-27 19:23:48,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2023-01-27 19:23:48,672 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 5 predicate places. [2023-01-27 19:23:48,673 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 228 flow [2023-01-27 19:23:48,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:48,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:48,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:23:48,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-27 19:23:48,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-27 19:23:48,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:23:48,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:48,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2018648220, now seen corresponding path program 1 times [2023-01-27 19:23:48,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:48,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84124982] [2023-01-27 19:23:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:48,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:48,913 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 19:23:48,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:23:48,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84124982] [2023-01-27 19:23:48,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84124982] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:23:48,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846141818] [2023-01-27 19:23:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:48,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:23:48,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:23:48,915 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:23:48,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 19:23:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:48,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:23:48,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:23:48,999 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 19:23:48,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:23:49,007 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 19:23:49,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846141818] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:23:49,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:23:49,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:23:49,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685016055] [2023-01-27 19:23:49,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:23:49,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:23:49,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:23:49,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:23:49,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:23:49,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 618 [2023-01-27 19:23:49,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:49,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:23:49,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 618 [2023-01-27 19:23:49,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:24:04,965 INFO L130 PetriNetUnfolder]: 200915/283582 cut-off events. [2023-01-27 19:24:04,965 INFO L131 PetriNetUnfolder]: For 10256/10256 co-relation queries the response was YES. [2023-01-27 19:24:05,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552245 conditions, 283582 events. 200915/283582 cut-off events. For 10256/10256 co-relation queries the response was YES. Maximal size of possible extension queue 7563. Compared 2231185 event pairs, 188343 based on Foata normal form. 3/242695 useless extension candidates. Maximal degree in co-relation 552216. Up to 259469 conditions per place. [2023-01-27 19:24:06,297 INFO L137 encePairwiseOnDemand]: 615/618 looper letters, 70 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2023-01-27 19:24:06,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 390 flow [2023-01-27 19:24:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:24:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:24:06,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1703 transitions. [2023-01-27 19:24:06,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45927723840345197 [2023-01-27 19:24:06,301 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1703 transitions. [2023-01-27 19:24:06,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1703 transitions. [2023-01-27 19:24:06,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:24:06,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1703 transitions. [2023-01-27 19:24:06,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 283.8333333333333) internal successors, (1703), 6 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:06,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:06,307 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:06,307 INFO L175 Difference]: Start difference. First operand has 93 places, 91 transitions, 228 flow. Second operand 6 states and 1703 transitions. [2023-01-27 19:24:06,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 390 flow [2023-01-27 19:24:06,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:24:06,314 INFO L231 Difference]: Finished difference. Result has 100 places, 94 transitions, 262 flow [2023-01-27 19:24:06,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2023-01-27 19:24:06,314 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 12 predicate places. [2023-01-27 19:24:06,315 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 262 flow [2023-01-27 19:24:06,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:06,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:24:06,315 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:24:06,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-01-27 19:24:06,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-27 19:24:06,520 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:24:06,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:24:06,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1180385758, now seen corresponding path program 2 times [2023-01-27 19:24:06,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:24:06,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282687440] [2023-01-27 19:24:06,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:24:06,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:24:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:24:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:24:06,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:24:06,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282687440] [2023-01-27 19:24:06,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282687440] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:24:06,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345487856] [2023-01-27 19:24:06,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:24:06,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:24:06,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:24:06,607 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:24:06,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 19:24:06,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 19:24:06,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:24:06,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-27 19:24:06,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:24:06,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-27 19:24:06,715 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 19:24:06,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-27 19:24:06,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-27 19:24:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 19:24:06,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:24:06,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345487856] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:24:06,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:24:06,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-01-27 19:24:06,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2896554] [2023-01-27 19:24:06,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:24:06,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:24:06,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:24:06,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:24:06,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-27 19:24:06,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 618 [2023-01-27 19:24:06,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 229.33333333333334) internal successors, (1376), 6 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:06,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:24:06,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 618 [2023-01-27 19:24:06,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:24:28,367 INFO L130 PetriNetUnfolder]: 259150/362869 cut-off events. [2023-01-27 19:24:28,367 INFO L131 PetriNetUnfolder]: For 12861/12861 co-relation queries the response was YES. [2023-01-27 19:24:29,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716613 conditions, 362869 events. 259150/362869 cut-off events. For 12861/12861 co-relation queries the response was YES. Maximal size of possible extension queue 9582. Compared 2871550 event pairs, 59911 based on Foata normal form. 0/319304 useless extension candidates. Maximal degree in co-relation 716576. Up to 299197 conditions per place. [2023-01-27 19:24:30,367 INFO L137 encePairwiseOnDemand]: 606/618 looper letters, 194 selfloop transitions, 18 changer transitions 0/227 dead transitions. [2023-01-27 19:24:30,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 227 transitions, 1003 flow [2023-01-27 19:24:30,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:24:30,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:24:30,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1585 transitions. [2023-01-27 19:24:30,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274541531823085 [2023-01-27 19:24:30,381 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1585 transitions. [2023-01-27 19:24:30,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1585 transitions. [2023-01-27 19:24:30,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:24:30,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1585 transitions. [2023-01-27 19:24:30,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 264.1666666666667) internal successors, (1585), 6 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:30,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:30,405 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:30,405 INFO L175 Difference]: Start difference. First operand has 100 places, 94 transitions, 262 flow. Second operand 6 states and 1585 transitions. [2023-01-27 19:24:30,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 227 transitions, 1003 flow [2023-01-27 19:24:30,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 227 transitions, 989 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:24:30,412 INFO L231 Difference]: Finished difference. Result has 108 places, 110 transitions, 375 flow [2023-01-27 19:24:30,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2023-01-27 19:24:30,429 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 20 predicate places. [2023-01-27 19:24:30,429 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 375 flow [2023-01-27 19:24:30,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 229.33333333333334) internal successors, (1376), 6 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:30,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:24:30,430 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-27 19:24:30,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 19:24:30,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 19:24:30,630 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:24:30,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:24:30,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1169672839, now seen corresponding path program 1 times [2023-01-27 19:24:30,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:24:30,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733738862] [2023-01-27 19:24:30,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:24:30,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:24:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:24:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 19:24:30,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:24:30,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733738862] [2023-01-27 19:24:30,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733738862] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:24:30,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114351546] [2023-01-27 19:24:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:24:30,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:24:30,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:24:30,696 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:24:30,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 19:24:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:24:30,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 19:24:30,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:24:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 19:24:30,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:24:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 19:24:30,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114351546] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:24:30,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:24:30,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 19:24:30,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253918733] [2023-01-27 19:24:30,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:24:30,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 19:24:30,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:24:30,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 19:24:30,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-27 19:24:30,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 618 [2023-01-27 19:24:30,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 375 flow. Second operand has 13 states, 13 states have (on average 272.46153846153845) internal successors, (3542), 13 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:30,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:24:30,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 618 [2023-01-27 19:24:30,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:24:50,233 INFO L130 PetriNetUnfolder]: 202260/289008 cut-off events. [2023-01-27 19:24:50,234 INFO L131 PetriNetUnfolder]: For 119335/119685 co-relation queries the response was YES. [2023-01-27 19:24:51,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 641967 conditions, 289008 events. 202260/289008 cut-off events. For 119335/119685 co-relation queries the response was YES. Maximal size of possible extension queue 8459. Compared 2350171 event pairs, 179661 based on Foata normal form. 6/269876 useless extension candidates. Maximal degree in co-relation 641907. Up to 267861 conditions per place. [2023-01-27 19:24:51,842 INFO L137 encePairwiseOnDemand]: 615/618 looper letters, 86 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2023-01-27 19:24:51,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 116 transitions, 605 flow [2023-01-27 19:24:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 19:24:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 19:24:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3338 transitions. [2023-01-27 19:24:51,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501078748651564 [2023-01-27 19:24:51,864 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3338 transitions. [2023-01-27 19:24:51,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3338 transitions. [2023-01-27 19:24:51,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:24:51,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3338 transitions. [2023-01-27 19:24:51,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 278.1666666666667) internal successors, (3338), 12 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:51,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 618.0) internal successors, (8034), 13 states have internal predecessors, (8034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:51,875 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 618.0) internal successors, (8034), 13 states have internal predecessors, (8034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:51,875 INFO L175 Difference]: Start difference. First operand has 108 places, 110 transitions, 375 flow. Second operand 12 states and 3338 transitions. [2023-01-27 19:24:51,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 116 transitions, 605 flow [2023-01-27 19:24:52,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 116 transitions, 605 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:24:52,266 INFO L231 Difference]: Finished difference. Result has 125 places, 116 transitions, 459 flow [2023-01-27 19:24:52,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=459, PETRI_PLACES=125, PETRI_TRANSITIONS=116} [2023-01-27 19:24:52,267 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 37 predicate places. [2023-01-27 19:24:52,267 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 116 transitions, 459 flow [2023-01-27 19:24:52,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 272.46153846153845) internal successors, (3542), 13 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:52,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:24:52,267 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-27 19:24:52,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-27 19:24:52,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-27 19:24:52,473 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:24:52,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:24:52,473 INFO L85 PathProgramCache]: Analyzing trace with hash 2036537415, now seen corresponding path program 2 times [2023-01-27 19:24:52,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:24:52,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239919935] [2023-01-27 19:24:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:24:52,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:24:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:24:52,509 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:24:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:24:52,544 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:24:52,544 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:24:52,544 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-01-27 19:24:52,544 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-27 19:24:52,544 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-27 19:24:52,544 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 19:24:52,544 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 19:24:52,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 19:24:52,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-27 19:24:52,545 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-01-27 19:24:52,545 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:24:52,545 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:24:52,570 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:24:52,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 348 places, 412 transitions, 868 flow [2023-01-27 19:24:52,830 INFO L130 PetriNetUnfolder]: 157/890 cut-off events. [2023-01-27 19:24:52,830 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-01-27 19:24:52,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 890 events. 157/890 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4207 event pairs, 6 based on Foata normal form. 0/724 useless extension candidates. Maximal degree in co-relation 648. Up to 32 conditions per place. [2023-01-27 19:24:52,837 INFO L82 GeneralOperation]: Start removeDead. Operand has 348 places, 412 transitions, 868 flow [2023-01-27 19:24:52,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 348 places, 412 transitions, 868 flow [2023-01-27 19:24:52,844 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:24:52,844 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 348 places, 412 transitions, 868 flow [2023-01-27 19:24:52,844 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 348 places, 412 transitions, 868 flow [2023-01-27 19:24:52,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 348 places, 412 transitions, 868 flow [2023-01-27 19:24:52,926 INFO L130 PetriNetUnfolder]: 157/890 cut-off events. [2023-01-27 19:24:52,927 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-01-27 19:24:52,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 890 events. 157/890 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4207 event pairs, 6 based on Foata normal form. 0/724 useless extension candidates. Maximal degree in co-relation 648. Up to 32 conditions per place. [2023-01-27 19:24:52,969 INFO L119 LiptonReduction]: Number of co-enabled transitions 108488 [2023-01-27 19:24:56,490 INFO L134 LiptonReduction]: Checked pairs total: 188751 [2023-01-27 19:24:56,490 INFO L136 LiptonReduction]: Total number of compositions: 337 [2023-01-27 19:24:56,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:24:56,492 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;@1ea4f40a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:24:56,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 19:24:56,493 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2023-01-27 19:24:56,493 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:24:56,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:24:56,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:24:56,493 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 19:24:56,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:24:56,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1929788073, now seen corresponding path program 1 times [2023-01-27 19:24:56,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:24:56,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934417695] [2023-01-27 19:24:56,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:24:56,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:24:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:24:56,508 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 19:24:56,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:24:56,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934417695] [2023-01-27 19:24:56,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934417695] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:24:56,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:24:56,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:24:56,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715625611] [2023-01-27 19:24:56,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:24:56,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:24:56,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:24:56,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:24:56,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:24:56,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 749 [2023-01-27 19:24:56,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 161 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 330.6666666666667) internal successors, (992), 3 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:56,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:24:56,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 749 [2023-01-27 19:24:56,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand