/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 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 01:55:35,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 01:55:35,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 01:55:35,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-28 01:55:35,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 01:55:35,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 01:55:35,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 01:55:35,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 01:55:35,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 01:55:35,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 01:55:35,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 01:55:35,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 01:55:35,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 01:55:35,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 01:55:35,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 01:55:35,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 01:55:35,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 01:55:35,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 01:55:35,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 01:55:35,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 01:55:35,149 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 [2023-01-28 01:55:35,176 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 01:55:35,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 01:55:35,178 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 01:55:35,178 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 01:55:35,179 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 01:55:35,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 01:55:35,179 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 01:55:35,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 01:55:35,179 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 01:55:35,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 01:55:35,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 01:55:35,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 01:55:35,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 01:55:35,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 01:55:35,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 01:55:35,180 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 01:55:35,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 01:55:35,181 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 01:55:35,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 01:55:35,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 01:55:35,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 01:55:35,181 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 01:55:35,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 01:55:35,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 01:55:35,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 01:55:35,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 01:55:35,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 01:55:35,182 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 01:55:35,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 01:55:35,182 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 01:55:35,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 01:55:35,183 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 01:55:35,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 01:55:35,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 01:55:35,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 01:55:35,461 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 01:55:35,462 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 01:55:35,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-01-28 01:55:36,665 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 01:55:36,973 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 01:55:36,974 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-01-28 01:55:36,989 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a1ee5478/a8ddc1b8efa54379b6dda1f6cfdf8c70/FLAG29873fcbc [2023-01-28 01:55:37,002 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a1ee5478/a8ddc1b8efa54379b6dda1f6cfdf8c70 [2023-01-28 01:55:37,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 01:55:37,005 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 01:55:37,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 01:55:37,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 01:55:37,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 01:55:37,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 01:55:37" (1/1) ... [2023-01-28 01:55:37,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1139b471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:37, skipping insertion in model container [2023-01-28 01:55:37,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 01:55:37" (1/1) ... [2023-01-28 01:55:37,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 01:55:37,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 01:55:37,516 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_76-tricky_address3_racefree.i[41323,41336] [2023-01-28 01:55:37,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 01:55:37,572 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 01:55:37,608 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_76-tricky_address3_racefree.i[41323,41336] [2023-01-28 01:55:37,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 01:55:37,701 INFO L208 MainTranslator]: Completed translation [2023-01-28 01:55:37,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:37 WrapperNode [2023-01-28 01:55:37,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 01:55:37,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 01:55:37,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 01:55:37,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 01:55:37,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:37" (1/1) ... [2023-01-28 01:55:37,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:37" (1/1) ... [2023-01-28 01:55:37,776 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 193 [2023-01-28 01:55:37,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 01:55:37,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 01:55:37,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 01:55:37,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 01:55:37,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:37" (1/1) ... [2023-01-28 01:55:37,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:37" (1/1) ... [2023-01-28 01:55:37,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:37" (1/1) ... [2023-01-28 01:55:37,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:37" (1/1) ... [2023-01-28 01:55:37,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:37" (1/1) ... [2023-01-28 01:55:37,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:37" (1/1) ... [2023-01-28 01:55:37,847 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:37" (1/1) ... [2023-01-28 01:55:37,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:37" (1/1) ... [2023-01-28 01:55:37,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 01:55:37,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 01:55:37,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 01:55:37,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 01:55:37,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:37" (1/1) ... [2023-01-28 01:55:37,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 01:55:37,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:55:37,885 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) [2023-01-28 01:55:37,887 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 [2023-01-28 01:55:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 01:55:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 01:55:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 01:55:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 01:55:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 01:55:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 01:55:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 01:55:37,914 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 01:55:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 01:55:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 01:55:37,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 01:55:37,916 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 01:55:38,073 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 01:55:38,075 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 01:55:38,363 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 01:55:38,370 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 01:55:38,370 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-01-28 01:55:38,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 01:55:38 BoogieIcfgContainer [2023-01-28 01:55:38,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 01:55:38,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 01:55:38,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 01:55:38,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 01:55:38,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 01:55:37" (1/3) ... [2023-01-28 01:55:38,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f187c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 01:55:38, skipping insertion in model container [2023-01-28 01:55:38,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:37" (2/3) ... [2023-01-28 01:55:38,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f187c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 01:55:38, skipping insertion in model container [2023-01-28 01:55:38,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 01:55:38" (3/3) ... [2023-01-28 01:55:38,390 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_76-tricky_address3_racefree.i [2023-01-28 01:55:38,406 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 01:55:38,406 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-28 01:55:38,406 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 01:55:38,506 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 01:55:38,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 193 transitions, 394 flow [2023-01-28 01:55:38,602 INFO L130 PetriNetUnfolder]: 45/263 cut-off events. [2023-01-28 01:55:38,603 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-01-28 01:55:38,610 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. [2023-01-28 01:55:38,610 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 193 transitions, 394 flow [2023-01-28 01:55:38,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 188 transitions, 381 flow [2023-01-28 01:55:38,618 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:55:38,628 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 188 transitions, 381 flow [2023-01-28 01:55:38,630 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 188 transitions, 381 flow [2023-01-28 01:55:38,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 188 transitions, 381 flow [2023-01-28 01:55:38,678 INFO L130 PetriNetUnfolder]: 44/258 cut-off events. [2023-01-28 01:55:38,678 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:55:38,680 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. [2023-01-28 01:55:38,685 INFO L119 LiptonReduction]: Number of co-enabled transitions 10792 [2023-01-28 01:55:41,276 INFO L134 LiptonReduction]: Checked pairs total: 17790 [2023-01-28 01:55:41,276 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-01-28 01:55:41,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:55:41,294 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;@2b517871, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:55:41,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:55:41,299 INFO L130 PetriNetUnfolder]: 7/31 cut-off events. [2023-01-28 01:55:41,299 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:55:41,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:41,300 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-01-28 01:55:41,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:41,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:41,304 INFO L85 PathProgramCache]: Analyzing trace with hash -947284719, now seen corresponding path program 1 times [2023-01-28 01:55:41,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:41,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755111372] [2023-01-28 01:55:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:41,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:55:41,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:41,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755111372] [2023-01-28 01:55:41,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755111372] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:55:41,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:55:41,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:55:41,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197737476] [2023-01-28 01:55:41,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:55:41,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:55:41,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:41,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:55:41,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:55:41,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 357 [2023-01-28 01:55:41,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:41,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:41,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 357 [2023-01-28 01:55:41,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:55:41,696 INFO L130 PetriNetUnfolder]: 272/614 cut-off events. [2023-01-28 01:55:41,697 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:55:41,699 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. [2023-01-28 01:55:41,700 INFO L137 encePairwiseOnDemand]: 332/357 looper letters, 20 selfloop transitions, 2 changer transitions 18/45 dead transitions. [2023-01-28 01:55:41,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 167 flow [2023-01-28 01:55:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:55:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:55:41,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-01-28 01:55:41,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4892623716153128 [2023-01-28 01:55:41,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-01-28 01:55:41,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-01-28 01:55:41,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:55:41,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-01-28 01:55:41,731 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) [2023-01-28 01:55:41,736 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) [2023-01-28 01:55:41,737 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) [2023-01-28 01:55:41,739 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 524 transitions. [2023-01-28 01:55:41,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 167 flow [2023-01-28 01:55:41,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:55:41,743 INFO L231 Difference]: Finished difference. Result has 47 places, 27 transitions, 69 flow [2023-01-28 01:55:41,745 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=69, PETRI_PLACES=47, PETRI_TRANSITIONS=27} [2023-01-28 01:55:41,748 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-01-28 01:55:41,748 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 27 transitions, 69 flow [2023-01-28 01:55:41,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:41,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:41,749 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-28 01:55:41,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 01:55:41,749 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:41,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:41,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1382333179, now seen corresponding path program 1 times [2023-01-28 01:55:41,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:41,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170845343] [2023-01-28 01:55:41,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:41,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:55:41,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:41,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170845343] [2023-01-28 01:55:41,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170845343] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:55:41,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43805569] [2023-01-28 01:55:41,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:41,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:55:41,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:55:41,837 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) [2023-01-28 01:55:41,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 01:55:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:41,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:55:41,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:55:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:55:41,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:55:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:55:42,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43805569] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:55:42,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:55:42,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:55:42,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341097470] [2023-01-28 01:55:42,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:55:42,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:55:42,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:42,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:55:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:55:42,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 357 [2023-01-28 01:55:42,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 27 transitions, 69 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) [2023-01-28 01:55:42,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:42,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 357 [2023-01-28 01:55:42,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:55:42,130 INFO L130 PetriNetUnfolder]: 47/129 cut-off events. [2023-01-28 01:55:42,130 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:55:42,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 129 events. 47/129 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 381 event pairs, 42 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 245. Up to 108 conditions per place. [2023-01-28 01:55:42,131 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 20 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-01-28 01:55:42,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 131 flow [2023-01-28 01:55:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:55:42,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:55:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 958 transitions. [2023-01-28 01:55:42,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44724556489262374 [2023-01-28 01:55:42,134 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 958 transitions. [2023-01-28 01:55:42,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 958 transitions. [2023-01-28 01:55:42,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:55:42,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 958 transitions. [2023-01-28 01:55:42,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.66666666666666) internal successors, (958), 6 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:42,141 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) [2023-01-28 01:55:42,142 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) [2023-01-28 01:55:42,143 INFO L175 Difference]: Start difference. First operand has 47 places, 27 transitions, 69 flow. Second operand 6 states and 958 transitions. [2023-01-28 01:55:42,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 131 flow [2023-01-28 01:55:42,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 127 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 01:55:42,144 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 101 flow [2023-01-28 01:55:42,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-01-28 01:55:42,145 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -8 predicate places. [2023-01-28 01:55:42,145 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 101 flow [2023-01-28 01:55:42,146 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) [2023-01-28 01:55:42,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:42,146 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-01-28 01:55:42,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 01:55:42,352 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 [2023-01-28 01:55:42,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:42,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:42,353 INFO L85 PathProgramCache]: Analyzing trace with hash 941146001, now seen corresponding path program 2 times [2023-01-28 01:55:42,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:42,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284017463] [2023-01-28 01:55:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:42,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:55:42,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:42,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284017463] [2023-01-28 01:55:42,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284017463] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:55:42,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555348508] [2023-01-28 01:55:42,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:55:42,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:55:42,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:55:42,504 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) [2023-01-28 01:55:42,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 01:55:42,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:55:42,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:55:42,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:55:42,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:55:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:55:42,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:55:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:55:42,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555348508] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:55:42,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:55:42,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:55:42,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331405249] [2023-01-28 01:55:42,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:55:42,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:55:42,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:42,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:55:42,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:55:42,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 357 [2023-01-28 01:55:42,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 101 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) [2023-01-28 01:55:42,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:42,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 357 [2023-01-28 01:55:42,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:55:42,796 INFO L130 PetriNetUnfolder]: 47/135 cut-off events. [2023-01-28 01:55:42,796 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-28 01:55:42,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 135 events. 47/135 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 381 event pairs, 42 based on Foata normal form. 6/117 useless extension candidates. Maximal degree in co-relation 236. Up to 108 conditions per place. [2023-01-28 01:55:42,799 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 20 selfloop transitions, 11 changer transitions 0/36 dead transitions. [2023-01-28 01:55:42,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 199 flow [2023-01-28 01:55:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:55:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:55:42,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1897 transitions. [2023-01-28 01:55:42,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44281045751633985 [2023-01-28 01:55:42,804 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1897 transitions. [2023-01-28 01:55:42,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1897 transitions. [2023-01-28 01:55:42,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:55:42,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1897 transitions. [2023-01-28 01:55:42,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 158.08333333333334) internal successors, (1897), 12 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:42,815 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) [2023-01-28 01:55:42,818 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) [2023-01-28 01:55:42,818 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 101 flow. Second operand 12 states and 1897 transitions. [2023-01-28 01:55:42,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 199 flow [2023-01-28 01:55:42,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 36 transitions, 185 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 01:55:42,821 INFO L231 Difference]: Finished difference. Result has 53 places, 36 transitions, 171 flow [2023-01-28 01:55:42,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=171, PETRI_PLACES=53, PETRI_TRANSITIONS=36} [2023-01-28 01:55:42,822 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2023-01-28 01:55:42,822 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 36 transitions, 171 flow [2023-01-28 01:55:42,823 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) [2023-01-28 01:55:42,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:42,823 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-01-28 01:55:42,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 01:55:43,029 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 [2023-01-28 01:55:43,029 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:43,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:43,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1854023505, now seen corresponding path program 3 times [2023-01-28 01:55:43,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:43,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45835542] [2023-01-28 01:55:43,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:43,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:55:43,055 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:55:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:55:43,100 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:55:43,100 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:55:43,101 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:55:43,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 01:55:43,103 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:55:43,104 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:55:43,105 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:55:43,105 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 01:55:43,133 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 01:55:43,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-01-28 01:55:43,191 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-01-28 01:55:43,191 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-28 01:55:43,194 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. [2023-01-28 01:55:43,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 266 transitions, 550 flow [2023-01-28 01:55:43,198 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 266 transitions, 550 flow [2023-01-28 01:55:43,198 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:55:43,198 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 266 transitions, 550 flow [2023-01-28 01:55:43,198 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 266 transitions, 550 flow [2023-01-28 01:55:43,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-01-28 01:55:43,238 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-01-28 01:55:43,239 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-28 01:55:43,242 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. [2023-01-28 01:55:43,259 INFO L119 LiptonReduction]: Number of co-enabled transitions 33228 [2023-01-28 01:55:46,258 INFO L134 LiptonReduction]: Checked pairs total: 56804 [2023-01-28 01:55:46,258 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-01-28 01:55:46,260 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:55:46,261 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;@2b517871, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:55:46,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:55:46,268 INFO L130 PetriNetUnfolder]: 38/113 cut-off events. [2023-01-28 01:55:46,268 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 01:55:46,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:46,268 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:55:46,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:46,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:46,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1388603768, now seen corresponding path program 1 times [2023-01-28 01:55:46,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:46,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828298571] [2023-01-28 01:55:46,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:46,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:55:46,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:46,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828298571] [2023-01-28 01:55:46,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828298571] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:55:46,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:55:46,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:55:46,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134253183] [2023-01-28 01:55:46,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:55:46,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:55:46,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:46,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:55:46,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:55:46,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 485 [2023-01-28 01:55:46,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 101 transitions, 220 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) [2023-01-28 01:55:46,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:46,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 485 [2023-01-28 01:55:46,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:55:47,543 INFO L130 PetriNetUnfolder]: 10559/16533 cut-off events. [2023-01-28 01:55:47,543 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-01-28 01:55:47,568 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. [2023-01-28 01:55:47,592 INFO L137 encePairwiseOnDemand]: 450/485 looper letters, 38 selfloop transitions, 2 changer transitions 23/70 dead transitions. [2023-01-28 01:55:47,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 274 flow [2023-01-28 01:55:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:55:47,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:55:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2023-01-28 01:55:47,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017182130584192 [2023-01-28 01:55:47,595 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2023-01-28 01:55:47,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2023-01-28 01:55:47,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:55:47,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2023-01-28 01:55:47,597 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) [2023-01-28 01:55:47,599 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) [2023-01-28 01:55:47,601 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) [2023-01-28 01:55:47,601 INFO L175 Difference]: Start difference. First operand has 68 places, 101 transitions, 220 flow. Second operand 3 states and 730 transitions. [2023-01-28 01:55:47,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 274 flow [2023-01-28 01:55:47,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:55:47,606 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 116 flow [2023-01-28 01:55:47,606 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=116, PETRI_PLACES=71, PETRI_TRANSITIONS=47} [2023-01-28 01:55:47,607 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-01-28 01:55:47,608 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 116 flow [2023-01-28 01:55:47,608 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) [2023-01-28 01:55:47,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:47,608 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-28 01:55:47,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 01:55:47,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:47,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:47,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1867853176, now seen corresponding path program 1 times [2023-01-28 01:55:47,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:47,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870410697] [2023-01-28 01:55:47,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:47,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:55:47,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:47,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870410697] [2023-01-28 01:55:47,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870410697] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:55:47,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308894692] [2023-01-28 01:55:47,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:47,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:55:47,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:55:47,653 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) [2023-01-28 01:55:47,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 01:55:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:47,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:55:47,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:55:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:55:47,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:55:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:55:47,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308894692] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:55:47,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:55:47,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:55:47,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653508196] [2023-01-28 01:55:47,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:55:47,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:55:47,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:47,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:55:47,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:55:47,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 485 [2023-01-28 01:55:47,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 47 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 214.71428571428572) internal successors, (1503), 7 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:47,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:47,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 485 [2023-01-28 01:55:47,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:55:47,986 INFO L130 PetriNetUnfolder]: 1958/3219 cut-off events. [2023-01-28 01:55:47,986 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-01-28 01:55:47,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 3219 events. 1958/3219 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17560 event pairs, 1837 based on Foata normal form. 0/2639 useless extension candidates. Maximal degree in co-relation 6287. Up to 2999 conditions per place. [2023-01-28 01:55:48,004 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 38 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-01-28 01:55:48,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 214 flow [2023-01-28 01:55:48,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:55:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:55:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1324 transitions. [2023-01-28 01:55:48,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4549828178694158 [2023-01-28 01:55:48,103 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1324 transitions. [2023-01-28 01:55:48,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1324 transitions. [2023-01-28 01:55:48,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:55:48,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1324 transitions. [2023-01-28 01:55:48,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 220.66666666666666) internal successors, (1324), 6 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:48,111 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) [2023-01-28 01:55:48,112 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) [2023-01-28 01:55:48,112 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 116 flow. Second operand 6 states and 1324 transitions. [2023-01-28 01:55:48,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 214 flow [2023-01-28 01:55:48,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 208 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 01:55:48,113 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 146 flow [2023-01-28 01:55:48,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-01-28 01:55:48,114 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2023-01-28 01:55:48,114 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 146 flow [2023-01-28 01:55:48,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 214.71428571428572) internal successors, (1503), 7 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:48,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:48,115 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:55:48,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 01:55:48,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:55:48,316 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:48,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:48,317 INFO L85 PathProgramCache]: Analyzing trace with hash -845271688, now seen corresponding path program 2 times [2023-01-28 01:55:48,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:48,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101373644] [2023-01-28 01:55:48,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:48,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:55:48,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:48,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101373644] [2023-01-28 01:55:48,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101373644] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:55:48,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454408083] [2023-01-28 01:55:48,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:55:48,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:55:48,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:55:48,418 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) [2023-01-28 01:55:48,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 01:55:48,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:55:48,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:55:48,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:55:48,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:55:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:55:48,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:55:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:55:48,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454408083] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:55:48,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:55:48,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:55:48,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042245903] [2023-01-28 01:55:48,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:55:48,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:55:48,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:48,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:55:48,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:55:48,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 485 [2023-01-28 01:55:48,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 146 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) [2023-01-28 01:55:48,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:48,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 485 [2023-01-28 01:55:48,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:55:48,859 INFO L130 PetriNetUnfolder]: 1958/3225 cut-off events. [2023-01-28 01:55:48,859 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2023-01-28 01:55:48,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6331 conditions, 3225 events. 1958/3225 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17557 event pairs, 1837 based on Foata normal form. 6/2652 useless extension candidates. Maximal degree in co-relation 6272. Up to 2999 conditions per place. [2023-01-28 01:55:48,873 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 38 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2023-01-28 01:55:48,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 280 flow [2023-01-28 01:55:48,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:55:48,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:55:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2611 transitions. [2023-01-28 01:55:48,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4486254295532646 [2023-01-28 01:55:48,880 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2611 transitions. [2023-01-28 01:55:48,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2611 transitions. [2023-01-28 01:55:48,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:55:48,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2611 transitions. [2023-01-28 01:55:48,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 217.58333333333334) internal successors, (2611), 12 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:48,893 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) [2023-01-28 01:55:48,894 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) [2023-01-28 01:55:48,895 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 146 flow. Second operand 12 states and 2611 transitions. [2023-01-28 01:55:48,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 280 flow [2023-01-28 01:55:48,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 56 transitions, 266 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 01:55:48,897 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 216 flow [2023-01-28 01:55:48,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=74, PETRI_TRANSITIONS=56} [2023-01-28 01:55:48,897 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2023-01-28 01:55:48,898 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 216 flow [2023-01-28 01:55:48,899 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) [2023-01-28 01:55:48,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:48,899 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:55:48,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 01:55:49,105 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 [2023-01-28 01:55:49,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:49,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:49,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1266609288, now seen corresponding path program 3 times [2023-01-28 01:55:49,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:49,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918282286] [2023-01-28 01:55:49,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:49,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:55:49,136 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:55:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:55:49,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:55:49,172 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:55:49,172 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:55:49,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 01:55:49,173 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:55:49,173 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:55:49,173 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:55:49,173 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 01:55:49,206 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 01:55:49,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 339 transitions, 708 flow [2023-01-28 01:55:49,281 INFO L130 PetriNetUnfolder]: 110/628 cut-off events. [2023-01-28 01:55:49,281 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-01-28 01:55:49,289 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. [2023-01-28 01:55:49,289 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 339 transitions, 708 flow [2023-01-28 01:55:49,301 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 339 transitions, 708 flow [2023-01-28 01:55:49,302 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:55:49,302 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 339 transitions, 708 flow [2023-01-28 01:55:49,302 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 339 transitions, 708 flow [2023-01-28 01:55:49,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 339 transitions, 708 flow [2023-01-28 01:55:49,371 INFO L130 PetriNetUnfolder]: 110/628 cut-off events. [2023-01-28 01:55:49,372 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-01-28 01:55:49,380 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. [2023-01-28 01:55:49,405 INFO L119 LiptonReduction]: Number of co-enabled transitions 65604 [2023-01-28 01:55:52,904 INFO L134 LiptonReduction]: Checked pairs total: 110294 [2023-01-28 01:55:52,904 INFO L136 LiptonReduction]: Total number of compositions: 279 [2023-01-28 01:55:52,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:55:52,905 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;@2b517871, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:55:52,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:55:52,913 INFO L130 PetriNetUnfolder]: 64/182 cut-off events. [2023-01-28 01:55:52,914 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-28 01:55:52,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:52,914 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:55:52,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:52,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:52,914 INFO L85 PathProgramCache]: Analyzing trace with hash 757390343, now seen corresponding path program 1 times [2023-01-28 01:55:52,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:52,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833120242] [2023-01-28 01:55:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:52,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:55:52,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:52,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833120242] [2023-01-28 01:55:52,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833120242] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:55:52,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:55:52,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:55:52,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902103894] [2023-01-28 01:55:52,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:55:52,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:55:52,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:52,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:55:52,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:55:52,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 618 [2023-01-28 01:55:52,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:52,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:52,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 618 [2023-01-28 01:55:52,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:56:10,003 INFO L130 PetriNetUnfolder]: 199024/283218 cut-off events. [2023-01-28 01:56:10,003 INFO L131 PetriNetUnfolder]: For 3132/3132 co-relation queries the response was YES. [2023-01-28 01:56:10,607 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. [2023-01-28 01:56:10,959 INFO L137 encePairwiseOnDemand]: 573/618 looper letters, 50 selfloop transitions, 2 changer transitions 24/90 dead transitions. [2023-01-28 01:56:10,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 352 flow [2023-01-28 01:56:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:56:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:56:10,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 927 transitions. [2023-01-28 01:56:10,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-01-28 01:56:10,964 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 927 transitions. [2023-01-28 01:56:10,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 927 transitions. [2023-01-28 01:56:10,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:56:10,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 927 transitions. [2023-01-28 01:56:10,966 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) [2023-01-28 01:56:10,969 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) [2023-01-28 01:56:10,970 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) [2023-01-28 01:56:10,970 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 927 transitions. [2023-01-28 01:56:10,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 352 flow [2023-01-28 01:56:10,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:56:10,976 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 163 flow [2023-01-28 01:56:10,976 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=163, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2023-01-28 01:56:10,977 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-01-28 01:56:10,977 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 163 flow [2023-01-28 01:56:10,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:10,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:56:10,978 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 01:56:10,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 01:56:10,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:56:10,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:56:10,978 INFO L85 PathProgramCache]: Analyzing trace with hash -494923007, now seen corresponding path program 1 times [2023-01-28 01:56:10,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:56:10,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048040307] [2023-01-28 01:56:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:56:10,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:56:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:56:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:56:11,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:56:11,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048040307] [2023-01-28 01:56:11,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048040307] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:56:11,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388642476] [2023-01-28 01:56:11,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:56:11,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:56:11,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:56:11,024 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) [2023-01-28 01:56:11,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 01:56:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:56:11,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:56:11,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:56:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:56:11,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:56:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:56:11,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388642476] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:56:11,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:56:11,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:56:11,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676882189] [2023-01-28 01:56:11,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:56:11,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:56:11,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:56:11,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:56:11,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:56:11,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 618 [2023-01-28 01:56:11,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 163 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) [2023-01-28 01:56:11,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:56:11,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 618 [2023-01-28 01:56:11,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:56:14,257 INFO L130 PetriNetUnfolder]: 38291/55507 cut-off events. [2023-01-28 01:56:14,258 INFO L131 PetriNetUnfolder]: For 1588/1588 co-relation queries the response was YES. [2023-01-28 01:56:14,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107316 conditions, 55507 events. 38291/55507 cut-off events. For 1588/1588 co-relation queries the response was YES. Maximal size of possible extension queue 1783. Compared 388835 event pairs, 36162 based on Foata normal form. 0/45799 useless extension candidates. Maximal degree in co-relation 107302. Up to 50628 conditions per place. [2023-01-28 01:56:14,475 INFO L137 encePairwiseOnDemand]: 615/618 looper letters, 50 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-01-28 01:56:14,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 285 flow [2023-01-28 01:56:14,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:56:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:56:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1684 transitions. [2023-01-28 01:56:14,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45415318230852214 [2023-01-28 01:56:14,482 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1684 transitions. [2023-01-28 01:56:14,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1684 transitions. [2023-01-28 01:56:14,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:56:14,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1684 transitions. [2023-01-28 01:56:14,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 280.6666666666667) internal successors, (1684), 6 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:14,490 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) [2023-01-28 01:56:14,491 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) [2023-01-28 01:56:14,492 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 163 flow. Second operand 6 states and 1684 transitions. [2023-01-28 01:56:14,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 285 flow [2023-01-28 01:56:14,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 69 transitions, 275 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-28 01:56:14,496 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 189 flow [2023-01-28 01:56:14,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-01-28 01:56:14,499 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -10 predicate places. [2023-01-28 01:56:14,499 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 189 flow [2023-01-28 01:56:14,511 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) [2023-01-28 01:56:14,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:56:14,511 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:56:14,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 01:56:14,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-28 01:56:14,721 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:56:14,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:56:14,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1169672839, now seen corresponding path program 2 times [2023-01-28 01:56:14,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:56:14,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965424114] [2023-01-28 01:56:14,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:56:14,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:56:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:56:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:56:14,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:56:14,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965424114] [2023-01-28 01:56:14,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965424114] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:56:14,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821767081] [2023-01-28 01:56:14,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:56:14,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:56:14,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:56:14,801 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) [2023-01-28 01:56:14,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 01:56:14,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:56:14,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:56:14,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:56:14,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:56:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:56:14,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:56:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:56:14,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821767081] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:56:14,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:56:14,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:56:14,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553298659] [2023-01-28 01:56:14,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:56:14,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:56:14,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:56:14,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:56:14,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:56:14,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 618 [2023-01-28 01:56:14,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 189 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) [2023-01-28 01:56:14,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:56:14,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 618 [2023-01-28 01:56:14,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:56:18,205 INFO L130 PetriNetUnfolder]: 38291/55513 cut-off events. [2023-01-28 01:56:18,205 INFO L131 PetriNetUnfolder]: For 724/724 co-relation queries the response was YES. [2023-01-28 01:56:18,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106984 conditions, 55513 events. 38291/55513 cut-off events. For 724/724 co-relation queries the response was YES. Maximal size of possible extension queue 1783. Compared 388995 event pairs, 36162 based on Foata normal form. 6/45812 useless extension candidates. Maximal degree in co-relation 106924. Up to 50628 conditions per place. [2023-01-28 01:56:18,440 INFO L137 encePairwiseOnDemand]: 615/618 looper letters, 50 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-01-28 01:56:18,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 75 transitions, 347 flow [2023-01-28 01:56:18,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:56:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:56:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3319 transitions. [2023-01-28 01:56:18,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475458468176915 [2023-01-28 01:56:18,449 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3319 transitions. [2023-01-28 01:56:18,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3319 transitions. [2023-01-28 01:56:18,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:56:18,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3319 transitions. [2023-01-28 01:56:18,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 276.5833333333333) internal successors, (3319), 12 states have internal predecessors, (3319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:18,463 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) [2023-01-28 01:56:18,464 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) [2023-01-28 01:56:18,464 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 189 flow. Second operand 12 states and 3319 transitions. [2023-01-28 01:56:18,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 75 transitions, 347 flow [2023-01-28 01:56:18,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 75 transitions, 333 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 01:56:18,468 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 259 flow [2023-01-28 01:56:18,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=259, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-01-28 01:56:18,469 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 6 predicate places. [2023-01-28 01:56:18,469 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 259 flow [2023-01-28 01:56:18,470 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) [2023-01-28 01:56:18,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:56:18,470 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:56:18,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 01:56:18,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:56:18,676 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:56:18,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:56:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2036537415, now seen corresponding path program 3 times [2023-01-28 01:56:18,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:56:18,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907404509] [2023-01-28 01:56:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:56:18,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:56:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:56:18,709 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:56:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:56:18,736 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:56:18,736 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:56:18,737 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:56:18,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 01:56:18,737 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:56:18,737 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:56:18,737 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:56:18,737 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 01:56:18,770 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 01:56:18,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 348 places, 412 transitions, 868 flow [2023-01-28 01:56:18,892 INFO L130 PetriNetUnfolder]: 157/890 cut-off events. [2023-01-28 01:56:18,892 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-01-28 01:56:18,909 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. [2023-01-28 01:56:18,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 348 places, 412 transitions, 868 flow [2023-01-28 01:56:18,916 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 348 places, 412 transitions, 868 flow [2023-01-28 01:56:18,917 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:56:18,917 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 348 places, 412 transitions, 868 flow [2023-01-28 01:56:18,917 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 348 places, 412 transitions, 868 flow [2023-01-28 01:56:18,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 348 places, 412 transitions, 868 flow [2023-01-28 01:56:19,207 INFO L130 PetriNetUnfolder]: 157/890 cut-off events. [2023-01-28 01:56:19,208 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-01-28 01:56:19,220 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. [2023-01-28 01:56:19,265 INFO L119 LiptonReduction]: Number of co-enabled transitions 108488 [2023-01-28 01:56:23,091 INFO L134 LiptonReduction]: Checked pairs total: 188751 [2023-01-28 01:56:23,092 INFO L136 LiptonReduction]: Total number of compositions: 337 [2023-01-28 01:56:23,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:56:23,096 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;@2b517871, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:56:23,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:56:23,108 INFO L130 PetriNetUnfolder]: 87/249 cut-off events. [2023-01-28 01:56:23,108 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-01-28 01:56:23,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:56:23,108 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 01:56:23,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:56:23,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:56:23,109 INFO L85 PathProgramCache]: Analyzing trace with hash -460812786, now seen corresponding path program 1 times [2023-01-28 01:56:23,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:56:23,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000382152] [2023-01-28 01:56:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:56:23,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:56:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:56:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-28 01:56:23,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:56:23,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000382152] [2023-01-28 01:56:23,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000382152] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:56:23,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:56:23,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:56:23,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338254842] [2023-01-28 01:56:23,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:56:23,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:56:23,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:56:23,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:56:23,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:56:23,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 749 [2023-01-28 01:56:23,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 161 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 331.6666666666667) internal successors, (995), 3 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:23,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:56:23,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 749 [2023-01-28 01:56:23,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand