/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:07:22,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:07:22,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:07:22,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:07:22,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:07:22,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:07:22,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:07:22,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:07:22,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:07:22,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:07:22,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:07:22,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:07:22,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:07:22,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:07:22,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:07:22,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:07:22,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:07:22,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:07:22,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:07:22,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:07:22,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:07:22,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:07:22,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:07:22,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:07:22,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:07:22,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:07:22,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:07:22,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:07:22,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 19:07:22,584 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:07:22,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:07:22,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:07:22,585 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:07:22,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:07:22,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:07:22,586 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:07:22,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:07:22,586 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:07:22,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:07:22,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:07:22,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:07:22,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:07:22,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:07:22,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:07:22,587 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:07:22,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:07:22,587 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:07:22,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:07:22,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:07:22,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:07:22,588 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:07:22,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:07:22,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:07:22,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:07:22,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:07:22,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:07:22,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:07:22,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:07:22,589 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:07:22,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:07:22,589 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:07:22,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:07:22,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:07:22,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:07:22,794 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:07:22,795 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:07:22,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.i [2023-01-27 19:07:23,832 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:07:24,055 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:07:24,055 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.i [2023-01-27 19:07:24,077 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deec24cc8/e300149331f7475d9d24cff7ab935e06/FLAG7c5e6807a [2023-01-27 19:07:24,088 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deec24cc8/e300149331f7475d9d24cff7ab935e06 [2023-01-27 19:07:24,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:07:24,091 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:07:24,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:07:24,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:07:24,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:07:24,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:07:24" (1/1) ... [2023-01-27 19:07:24,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c555357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:24, skipping insertion in model container [2023-01-27 19:07:24,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:07:24" (1/1) ... [2023-01-27 19:07:24,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:07:24,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:07:24,448 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_06-cond_racing1.i[41322,41335] [2023-01-27 19:07:24,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:07:24,480 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:07:24,512 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_06-cond_racing1.i[41322,41335] [2023-01-27 19:07:24,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:07:24,576 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:07:24,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:24 WrapperNode [2023-01-27 19:07:24,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:07:24,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:07:24,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:07:24,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:07:24,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:24" (1/1) ... [2023-01-27 19:07:24,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:24" (1/1) ... [2023-01-27 19:07:24,611 INFO L138 Inliner]: procedures = 270, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2023-01-27 19:07:24,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:07:24,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:07:24,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:07:24,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:07:24,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:24" (1/1) ... [2023-01-27 19:07:24,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:24" (1/1) ... [2023-01-27 19:07:24,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:24" (1/1) ... [2023-01-27 19:07:24,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:24" (1/1) ... [2023-01-27 19:07:24,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:24" (1/1) ... [2023-01-27 19:07:24,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:24" (1/1) ... [2023-01-27 19:07:24,629 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:24" (1/1) ... [2023-01-27 19:07:24,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:24" (1/1) ... [2023-01-27 19:07:24,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:07:24,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:07:24,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:07:24,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:07:24,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:24" (1/1) ... [2023-01-27 19:07:24,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:07:24,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:07:24,662 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 19:07:24,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 19:07:24,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:07:24,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:07:24,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:07:24,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:07:24,687 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:07:24,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:07:24,687 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:07:24,687 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:07:24,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:07:24,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:07:24,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:07:24,688 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 19:07:24,776 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:07:24,777 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:07:25,015 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:07:25,020 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:07:25,020 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-01-27 19:07:25,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:07:25 BoogieIcfgContainer [2023-01-27 19:07:25,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:07:25,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:07:25,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:07:25,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:07:25,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:07:24" (1/3) ... [2023-01-27 19:07:25,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f0edda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:07:25, skipping insertion in model container [2023-01-27 19:07:25,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:24" (2/3) ... [2023-01-27 19:07:25,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f0edda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:07:25, skipping insertion in model container [2023-01-27 19:07:25,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:07:25" (3/3) ... [2023-01-27 19:07:25,029 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_06-cond_racing1.i [2023-01-27 19:07:25,041 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:07:25,041 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 19:07:25,041 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:07:25,146 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:07:25,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 119 transitions, 246 flow [2023-01-27 19:07:25,259 INFO L130 PetriNetUnfolder]: 23/161 cut-off events. [2023-01-27 19:07:25,259 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:07:25,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 161 events. 23/161 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 360 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 79. Up to 6 conditions per place. [2023-01-27 19:07:25,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 119 transitions, 246 flow [2023-01-27 19:07:25,268 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 114 transitions, 233 flow [2023-01-27 19:07:25,270 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:07:25,286 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 114 transitions, 233 flow [2023-01-27 19:07:25,288 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 114 transitions, 233 flow [2023-01-27 19:07:25,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 114 transitions, 233 flow [2023-01-27 19:07:25,315 INFO L130 PetriNetUnfolder]: 22/156 cut-off events. [2023-01-27 19:07:25,315 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:07:25,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 156 events. 22/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 350 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 79. Up to 6 conditions per place. [2023-01-27 19:07:25,317 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-01-27 19:07:27,775 INFO L134 LiptonReduction]: Checked pairs total: 4411 [2023-01-27 19:07:27,775 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-01-27 19:07:27,785 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:07:27,795 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;@48d3d624, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:07:27,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:07:27,818 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-01-27 19:07:27,819 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:07:27,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:27,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:07:27,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:27,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:27,828 INFO L85 PathProgramCache]: Analyzing trace with hash 14157000, now seen corresponding path program 1 times [2023-01-27 19:07:27,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:27,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382217406] [2023-01-27 19:07:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:27,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:07:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:07:28,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:07:28,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382217406] [2023-01-27 19:07:28,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382217406] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:07:28,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:07:28,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:07:28,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546841640] [2023-01-27 19:07:28,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:07:28,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:07:28,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:07:28,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:07:28,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:07:28,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 217 [2023-01-27 19:07:28,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 34 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:28,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:07:28,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 217 [2023-01-27 19:07:28,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:07:28,150 INFO L130 PetriNetUnfolder]: 105/234 cut-off events. [2023-01-27 19:07:28,151 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:07:28,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 234 events. 105/234 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1040 event pairs, 0 based on Foata normal form. 22/211 useless extension candidates. Maximal degree in co-relation 443. Up to 214 conditions per place. [2023-01-27 19:07:28,154 INFO L137 encePairwiseOnDemand]: 204/217 looper letters, 22 selfloop transitions, 2 changer transitions 8/34 dead transitions. [2023-01-27 19:07:28,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 137 flow [2023-01-27 19:07:28,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:07:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:07:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-01-27 19:07:28,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2023-01-27 19:07:28,172 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-01-27 19:07:28,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-01-27 19:07:28,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:07:28,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-01-27 19:07:28,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:28,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:28,186 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:28,187 INFO L175 Difference]: Start difference. First operand has 27 places, 34 transitions, 73 flow. Second operand 3 states and 343 transitions. [2023-01-27 19:07:28,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 137 flow [2023-01-27 19:07:28,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:07:28,190 INFO L231 Difference]: Finished difference. Result has 30 places, 17 transitions, 47 flow [2023-01-27 19:07:28,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=30, PETRI_TRANSITIONS=17} [2023-01-27 19:07:28,193 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2023-01-27 19:07:28,194 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 17 transitions, 47 flow [2023-01-27 19:07:28,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:28,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:28,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 19:07:28,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:07:28,194 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:28,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:28,195 INFO L85 PathProgramCache]: Analyzing trace with hash 690972307, now seen corresponding path program 1 times [2023-01-27 19:07:28,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:28,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066407979] [2023-01-27 19:07:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:28,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:07:28,217 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:07:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:07:28,244 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:07:28,244 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:07:28,245 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:07:28,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:07:28,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:07:28,247 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:07:28,248 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:07:28,248 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:07:28,260 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:07:28,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 149 transitions, 316 flow [2023-01-27 19:07:28,279 INFO L130 PetriNetUnfolder]: 40/257 cut-off events. [2023-01-27 19:07:28,280 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:07:28,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 40/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 722 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 163. Up to 9 conditions per place. [2023-01-27 19:07:28,281 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 149 transitions, 316 flow [2023-01-27 19:07:28,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 149 transitions, 316 flow [2023-01-27 19:07:28,282 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:07:28,282 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 149 transitions, 316 flow [2023-01-27 19:07:28,283 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 149 transitions, 316 flow [2023-01-27 19:07:28,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 149 transitions, 316 flow [2023-01-27 19:07:28,297 INFO L130 PetriNetUnfolder]: 40/257 cut-off events. [2023-01-27 19:07:28,297 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:07:28,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 40/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 722 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 163. Up to 9 conditions per place. [2023-01-27 19:07:28,301 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-01-27 19:07:30,847 INFO L134 LiptonReduction]: Checked pairs total: 17120 [2023-01-27 19:07:30,848 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-01-27 19:07:30,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:07:30,856 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;@48d3d624, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:07:30,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:07:30,859 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-01-27 19:07:30,859 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:07:30,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:30,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:07:30,859 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:30,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:30,874 INFO L85 PathProgramCache]: Analyzing trace with hash 23206963, now seen corresponding path program 1 times [2023-01-27 19:07:30,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:30,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424802619] [2023-01-27 19:07:30,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:30,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:07:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:07:30,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:07:30,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424802619] [2023-01-27 19:07:30,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424802619] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:07:30,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:07:30,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:07:30,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364631190] [2023-01-27 19:07:30,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:07:30,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:07:30,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:07:30,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:07:30,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:07:30,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 264 [2023-01-27 19:07:30,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:30,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:07:30,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 264 [2023-01-27 19:07:30,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:07:31,165 INFO L130 PetriNetUnfolder]: 1446/2554 cut-off events. [2023-01-27 19:07:31,165 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-01-27 19:07:31,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4948 conditions, 2554 events. 1446/2554 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 15320 event pairs, 648 based on Foata normal form. 269/2497 useless extension candidates. Maximal degree in co-relation 661. Up to 2327 conditions per place. [2023-01-27 19:07:31,173 INFO L137 encePairwiseOnDemand]: 246/264 looper letters, 28 selfloop transitions, 2 changer transitions 11/51 dead transitions. [2023-01-27 19:07:31,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 200 flow [2023-01-27 19:07:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:07:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:07:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2023-01-27 19:07:31,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328282828282829 [2023-01-27 19:07:31,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2023-01-27 19:07:31,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2023-01-27 19:07:31,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:07:31,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2023-01-27 19:07:31,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:31,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:31,180 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:31,180 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 422 transitions. [2023-01-27 19:07:31,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 200 flow [2023-01-27 19:07:31,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:07:31,183 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 88 flow [2023-01-27 19:07:31,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2023-01-27 19:07:31,184 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-01-27 19:07:31,184 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 88 flow [2023-01-27 19:07:31,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:31,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:31,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:07:31,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:07:31,186 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:31,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:31,186 INFO L85 PathProgramCache]: Analyzing trace with hash 404661933, now seen corresponding path program 1 times [2023-01-27 19:07:31,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:31,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431209760] [2023-01-27 19:07:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:31,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:07:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:07:31,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:07:31,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431209760] [2023-01-27 19:07:31,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431209760] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:07:31,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728739610] [2023-01-27 19:07:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:31,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:07:31,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:07:31,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:07:31,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 19:07:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:07:31,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:07:31,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:07:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:07:31,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:07:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:07:31,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728739610] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:07:31,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:07:31,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:07:31,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233140018] [2023-01-27 19:07:31,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:07:31,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:07:31,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:07:31,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:07:31,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:07:31,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 264 [2023-01-27 19:07:31,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 122.28571428571429) internal successors, (856), 7 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:31,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:07:31,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 264 [2023-01-27 19:07:31,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:07:31,519 INFO L130 PetriNetUnfolder]: 286/564 cut-off events. [2023-01-27 19:07:31,519 INFO L131 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2023-01-27 19:07:31,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 564 events. 286/564 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2707 event pairs, 89 based on Foata normal form. 70/632 useless extension candidates. Maximal degree in co-relation 800. Up to 346 conditions per place. [2023-01-27 19:07:31,521 INFO L137 encePairwiseOnDemand]: 261/264 looper letters, 39 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-01-27 19:07:31,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 208 flow [2023-01-27 19:07:31,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 19:07:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 19:07:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 644 transitions. [2023-01-27 19:07:31,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787878787878786 [2023-01-27 19:07:31,523 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 644 transitions. [2023-01-27 19:07:31,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 644 transitions. [2023-01-27 19:07:31,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:07:31,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 644 transitions. [2023-01-27 19:07:31,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.8) internal successors, (644), 5 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:31,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:31,527 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:31,527 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 88 flow. Second operand 5 states and 644 transitions. [2023-01-27 19:07:31,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 208 flow [2023-01-27 19:07:31,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:07:31,529 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-01-27 19:07:31,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-01-27 19:07:31,529 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2023-01-27 19:07:31,530 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-01-27 19:07:31,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.28571428571429) internal successors, (856), 7 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:31,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:31,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 19:07:31,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 19:07:31,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:07:31,735 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:31,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:31,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1652856533, now seen corresponding path program 1 times [2023-01-27 19:07:31,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:31,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354811953] [2023-01-27 19:07:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:31,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:07:31,746 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:07:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:07:31,756 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:07:31,756 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:07:31,756 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:07:31,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:07:31,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:07:31,756 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:07:31,757 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:07:31,757 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:07:31,769 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:07:31,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 179 transitions, 388 flow [2023-01-27 19:07:31,793 INFO L130 PetriNetUnfolder]: 62/384 cut-off events. [2023-01-27 19:07:31,793 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:07:31,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 384 events. 62/384 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1219 event pairs, 1 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2023-01-27 19:07:31,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 179 transitions, 388 flow [2023-01-27 19:07:31,796 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 179 transitions, 388 flow [2023-01-27 19:07:31,796 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:07:31,796 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 179 transitions, 388 flow [2023-01-27 19:07:31,796 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 179 transitions, 388 flow [2023-01-27 19:07:31,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 179 transitions, 388 flow [2023-01-27 19:07:31,818 INFO L130 PetriNetUnfolder]: 62/384 cut-off events. [2023-01-27 19:07:31,818 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:07:31,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 384 events. 62/384 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1219 event pairs, 1 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2023-01-27 19:07:31,826 INFO L119 LiptonReduction]: Number of co-enabled transitions 13944 [2023-01-27 19:07:34,347 INFO L134 LiptonReduction]: Checked pairs total: 34673 [2023-01-27 19:07:34,347 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-01-27 19:07:34,349 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:07:34,349 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;@48d3d624, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:07:34,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:07:34,351 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-27 19:07:34,351 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:07:34,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:34,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:07:34,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:34,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:34,351 INFO L85 PathProgramCache]: Analyzing trace with hash 33550302, now seen corresponding path program 1 times [2023-01-27 19:07:34,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:34,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441240488] [2023-01-27 19:07:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:34,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:07:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:07:34,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:07:34,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441240488] [2023-01-27 19:07:34,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441240488] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:07:34,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:07:34,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:07:34,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036373158] [2023-01-27 19:07:34,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:07:34,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:07:34,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:07:34,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:07:34,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:07:34,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 306 [2023-01-27 19:07:34,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 78 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:34,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:07:34,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 306 [2023-01-27 19:07:34,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:07:36,020 INFO L130 PetriNetUnfolder]: 17546/27122 cut-off events. [2023-01-27 19:07:36,021 INFO L131 PetriNetUnfolder]: For 799/799 co-relation queries the response was YES. [2023-01-27 19:07:36,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52466 conditions, 27122 events. 17546/27122 cut-off events. For 799/799 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 199821 event pairs, 11031 based on Foata normal form. 6554/30483 useless extension candidates. Maximal degree in co-relation 5539. Up to 24769 conditions per place. [2023-01-27 19:07:36,100 INFO L137 encePairwiseOnDemand]: 281/306 looper letters, 35 selfloop transitions, 2 changer transitions 13/65 dead transitions. [2023-01-27 19:07:36,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 258 flow [2023-01-27 19:07:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:07:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:07:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-01-27 19:07:36,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2023-01-27 19:07:36,102 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-01-27 19:07:36,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-01-27 19:07:36,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:07:36,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-01-27 19:07:36,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:36,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:36,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:36,106 INFO L175 Difference]: Start difference. First operand has 60 places, 78 transitions, 186 flow. Second operand 3 states and 504 transitions. [2023-01-27 19:07:36,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 258 flow [2023-01-27 19:07:36,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 258 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:07:36,110 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 121 flow [2023-01-27 19:07:36,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2023-01-27 19:07:36,113 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-01-27 19:07:36,113 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 121 flow [2023-01-27 19:07:36,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:36,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:36,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:07:36,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:07:36,114 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:36,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:36,115 INFO L85 PathProgramCache]: Analyzing trace with hash 194957140, now seen corresponding path program 1 times [2023-01-27 19:07:36,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:36,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638414970] [2023-01-27 19:07:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:36,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:07:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:07:36,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:07:36,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638414970] [2023-01-27 19:07:36,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638414970] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:07:36,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482143182] [2023-01-27 19:07:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:36,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:07:36,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:07:36,158 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:07:36,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 19:07:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:07:36,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:07:36,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:07:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:07:36,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:07:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:07:36,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482143182] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:07:36,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:07:36,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:07:36,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91604115] [2023-01-27 19:07:36,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:07:36,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:07:36,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:07:36,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:07:36,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:07:36,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 306 [2023-01-27 19:07:36,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 144.28571428571428) internal successors, (1010), 7 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:36,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:07:36,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 306 [2023-01-27 19:07:36,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:07:36,652 INFO L130 PetriNetUnfolder]: 3352/5864 cut-off events. [2023-01-27 19:07:36,652 INFO L131 PetriNetUnfolder]: For 2162/2162 co-relation queries the response was YES. [2023-01-27 19:07:36,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12686 conditions, 5864 events. 3352/5864 cut-off events. For 2162/2162 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 40732 event pairs, 355 based on Foata normal form. 511/6183 useless extension candidates. Maximal degree in co-relation 8894. Up to 3178 conditions per place. [2023-01-27 19:07:36,678 INFO L137 encePairwiseOnDemand]: 303/306 looper letters, 67 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-01-27 19:07:36,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 345 flow [2023-01-27 19:07:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:07:36,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:07:36,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 926 transitions. [2023-01-27 19:07:36,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043572984749455 [2023-01-27 19:07:36,681 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 926 transitions. [2023-01-27 19:07:36,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 926 transitions. [2023-01-27 19:07:36,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:07:36,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 926 transitions. [2023-01-27 19:07:36,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.33333333333334) internal successors, (926), 6 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:36,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:36,687 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:36,687 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 121 flow. Second operand 6 states and 926 transitions. [2023-01-27 19:07:36,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 345 flow [2023-01-27 19:07:36,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 337 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-27 19:07:36,693 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-01-27 19:07:36,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-01-27 19:07:36,694 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-01-27 19:07:36,694 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-01-27 19:07:36,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.28571428571428) internal successors, (1010), 7 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:36,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:36,695 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 19:07:36,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 19:07:36,900 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,SelfDestructingSolverStorable6 [2023-01-27 19:07:36,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:36,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:36,900 INFO L85 PathProgramCache]: Analyzing trace with hash 672582438, now seen corresponding path program 1 times [2023-01-27 19:07:36,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:36,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891007491] [2023-01-27 19:07:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:36,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:07:36,921 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:07:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:07:36,942 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:07:36,942 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:07:36,942 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:07:36,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:07:36,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 19:07:36,942 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:07:36,943 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:07:36,943 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:07:36,967 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:07:36,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 209 transitions, 462 flow [2023-01-27 19:07:37,012 INFO L130 PetriNetUnfolder]: 96/575 cut-off events. [2023-01-27 19:07:37,012 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:07:37,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 575 events. 96/575 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2103 event pairs, 6 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 404. Up to 32 conditions per place. [2023-01-27 19:07:37,015 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 209 transitions, 462 flow [2023-01-27 19:07:37,018 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 209 transitions, 462 flow [2023-01-27 19:07:37,018 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:07:37,018 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 209 transitions, 462 flow [2023-01-27 19:07:37,018 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 209 transitions, 462 flow [2023-01-27 19:07:37,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 209 transitions, 462 flow [2023-01-27 19:07:37,060 INFO L130 PetriNetUnfolder]: 96/575 cut-off events. [2023-01-27 19:07:37,060 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:07:37,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 575 events. 96/575 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2103 event pairs, 6 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 404. Up to 32 conditions per place. [2023-01-27 19:07:37,168 INFO L119 LiptonReduction]: Number of co-enabled transitions 22064 [2023-01-27 19:07:39,870 INFO L134 LiptonReduction]: Checked pairs total: 64435 [2023-01-27 19:07:39,870 INFO L136 LiptonReduction]: Total number of compositions: 145 [2023-01-27 19:07:39,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:07:39,872 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;@48d3d624, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:07:39,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:07:39,873 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-01-27 19:07:39,873 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:07:39,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:39,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:07:39,873 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:39,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:39,874 INFO L85 PathProgramCache]: Analyzing trace with hash 45369677, now seen corresponding path program 1 times [2023-01-27 19:07:39,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:39,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222350822] [2023-01-27 19:07:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:39,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:07:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:07:39,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:07:39,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222350822] [2023-01-27 19:07:39,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222350822] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:07:39,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:07:39,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:07:39,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594939561] [2023-01-27 19:07:39,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:07:39,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:07:39,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:07:39,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:07:39,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:07:39,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 354 [2023-01-27 19:07:39,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:39,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:07:39,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 354 [2023-01-27 19:07:39,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:08:04,555 INFO L130 PetriNetUnfolder]: 298488/412851 cut-off events. [2023-01-27 19:08:04,556 INFO L131 PetriNetUnfolder]: For 14302/14302 co-relation queries the response was YES. [2023-01-27 19:08:05,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 808722 conditions, 412851 events. 298488/412851 cut-off events. For 14302/14302 co-relation queries the response was YES. Maximal size of possible extension queue 9094. Compared 3229527 event pairs, 281380 based on Foata normal form. 66925/446350 useless extension candidates. Maximal degree in co-relation 70570. Up to 387778 conditions per place. [2023-01-27 19:08:06,166 INFO L137 encePairwiseOnDemand]: 324/354 looper letters, 49 selfloop transitions, 2 changer transitions 13/79 dead transitions. [2023-01-27 19:08:06,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 328 flow [2023-01-27 19:08:06,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:08:06,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:08:06,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2023-01-27 19:08:06,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546139359698682 [2023-01-27 19:08:06,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 589 transitions. [2023-01-27 19:08:06,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 589 transitions. [2023-01-27 19:08:06,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:08:06,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 589 transitions. [2023-01-27 19:08:06,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:08:06,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:08:06,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:08:06,174 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 234 flow. Second operand 3 states and 589 transitions. [2023-01-27 19:08:06,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 328 flow [2023-01-27 19:08:06,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 79 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:08:06,179 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 156 flow [2023-01-27 19:08:06,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=73, 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=156, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2023-01-27 19:08:06,180 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-01-27 19:08:06,180 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 156 flow [2023-01-27 19:08:06,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:08:06,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:08:06,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:08:06,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 19:08:06,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:08:06,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:08:06,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1153775683, now seen corresponding path program 1 times [2023-01-27 19:08:06,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:08:06,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249943725] [2023-01-27 19:08:06,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:08:06,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:08:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:08:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:08:06,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:08:06,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249943725] [2023-01-27 19:08:06,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249943725] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:08:06,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135494876] [2023-01-27 19:08:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:08:06,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:08:06,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:08:06,217 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:08:06,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 19:08:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:08:06,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:08:06,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:08:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:08:06,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:08:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:08:06,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135494876] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:08:06,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:08:06,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:08:06,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181396025] [2023-01-27 19:08:06,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:08:06,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:08:06,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:08:06,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:08:06,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:08:06,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 354 [2023-01-27 19:08:06,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 166.28571428571428) internal successors, (1164), 7 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:08:06,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:08:06,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 354 [2023-01-27 19:08:06,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:08:14,905 INFO L130 PetriNetUnfolder]: 123712/165886 cut-off events. [2023-01-27 19:08:14,906 INFO L131 PetriNetUnfolder]: For 14617/14617 co-relation queries the response was YES. [2023-01-27 19:08:15,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345087 conditions, 165886 events. 123712/165886 cut-off events. For 14617/14617 co-relation queries the response was YES. Maximal size of possible extension queue 4107. Compared 1146813 event pairs, 8332 based on Foata normal form. 738/166622 useless extension candidates. Maximal degree in co-relation 305761. Up to 105949 conditions per place. [2023-01-27 19:08:15,861 INFO L137 encePairwiseOnDemand]: 350/354 looper letters, 120 selfloop transitions, 6 changer transitions 0/141 dead transitions. [2023-01-27 19:08:15,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 141 transitions, 580 flow [2023-01-27 19:08:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:08:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:08:15,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1113 transitions. [2023-01-27 19:08:15,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5240112994350282 [2023-01-27 19:08:15,864 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1113 transitions. [2023-01-27 19:08:15,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1113 transitions. [2023-01-27 19:08:15,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:08:15,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1113 transitions. [2023-01-27 19:08:15,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.5) internal successors, (1113), 6 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:08:15,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:08:15,869 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:08:15,869 INFO L175 Difference]: Start difference. First operand has 76 places, 57 transitions, 156 flow. Second operand 6 states and 1113 transitions. [2023-01-27 19:08:15,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 141 transitions, 580 flow [2023-01-27 19:08:15,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 141 transitions, 566 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:08:15,877 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-01-27 19:08:15,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-01-27 19:08:15,877 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-01-27 19:08:15,877 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-01-27 19:08:15,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.28571428571428) internal successors, (1164), 7 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:08:15,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:08:15,878 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 19:08:15,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-27 19:08:16,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:08:16,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:08:16,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:08:16,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2088589946, now seen corresponding path program 1 times [2023-01-27 19:08:16,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:08:16,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531463637] [2023-01-27 19:08:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:08:16,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:08:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:08:16,099 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:08:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:08:16,121 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:08:16,121 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:08:16,121 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:08:16,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:08:16,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 19:08:16,122 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:08:16,122 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:08:16,122 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 19:08:16,144 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-27 19:08:16,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 239 transitions, 538 flow [2023-01-27 19:08:16,221 INFO L130 PetriNetUnfolder]: 158/898 cut-off events. [2023-01-27 19:08:16,222 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:08:16,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 898 events. 158/898 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3848 event pairs, 23 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 620. Up to 80 conditions per place. [2023-01-27 19:08:16,228 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 239 transitions, 538 flow [2023-01-27 19:08:16,232 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 239 transitions, 538 flow [2023-01-27 19:08:16,232 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:08:16,232 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 239 transitions, 538 flow [2023-01-27 19:08:16,232 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 239 transitions, 538 flow [2023-01-27 19:08:16,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 239 transitions, 538 flow [2023-01-27 19:08:16,309 INFO L130 PetriNetUnfolder]: 158/898 cut-off events. [2023-01-27 19:08:16,310 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:08:16,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 898 events. 158/898 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3848 event pairs, 23 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 620. Up to 80 conditions per place. [2023-01-27 19:08:16,334 INFO L119 LiptonReduction]: Number of co-enabled transitions 31920 [2023-01-27 19:08:18,757 INFO L134 LiptonReduction]: Checked pairs total: 89067 [2023-01-27 19:08:18,757 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-01-27 19:08:18,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:08:18,759 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;@48d3d624, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:08:18,759 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:08:18,760 INFO L130 PetriNetUnfolder]: 4/16 cut-off events. [2023-01-27 19:08:18,760 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:08:18,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:08:18,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:08:18,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:08:18,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:08:18,760 INFO L85 PathProgramCache]: Analyzing trace with hash 58547274, now seen corresponding path program 1 times [2023-01-27 19:08:18,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:08:18,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138486466] [2023-01-27 19:08:18,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:08:18,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:08:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:08:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:08:18,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:08:18,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138486466] [2023-01-27 19:08:18,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138486466] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:08:18,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:08:18,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:08:18,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471784204] [2023-01-27 19:08:18,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:08:18,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:08:18,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:08:18,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:08:18,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:08:18,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 398 [2023-01-27 19:08:18,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 116 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:08:18,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:08:18,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 398 [2023-01-27 19:08:18,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand