/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_82-list_racefree_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:34:36,700 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:34:36,749 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:34:36,754 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:34:36,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:34:36,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:34:36,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:34:36,782 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:34:36,782 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:34:36,785 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:34:36,785 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:34:36,786 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:34:36,786 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:34:36,787 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:34:36,787 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:34:36,787 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:34:36,787 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:34:36,787 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:34:36,787 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:34:36,788 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:34:36,788 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:34:36,788 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:34:36,788 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:34:36,788 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:34:36,789 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:34:36,789 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:34:36,789 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:34:36,790 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:34:36,790 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:34:36,790 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:34:36,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:34:36,791 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:34:36,791 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:34:36,791 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:34:36,791 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:34:36,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:34:36,791 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:34:36,791 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:34:36,791 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:34:36,792 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:34:36,792 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:34:36,792 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:34:36,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:34:36,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:34:36,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:34:36,989 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:34:36,990 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:34:36,990 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_82-list_racefree_bound2.i [2023-08-03 21:34:37,904 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:34:38,148 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:34:38,149 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_82-list_racefree_bound2.i [2023-08-03 21:34:38,164 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/645c94453/12ba202a601a48fa9bcb6867e8d6a904/FLAGec2e3c6e9 [2023-08-03 21:34:38,177 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/645c94453/12ba202a601a48fa9bcb6867e8d6a904 [2023-08-03 21:34:38,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:34:38,182 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:34:38,182 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:34:38,182 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:34:38,185 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:34:38,186 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:34:38" (1/1) ... [2023-08-03 21:34:38,186 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@481de872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:34:38, skipping insertion in model container [2023-08-03 21:34:38,186 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:34:38" (1/1) ... [2023-08-03 21:34:38,224 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:34:38,496 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_82-list_racefree_bound2.i[47038,47051] [2023-08-03 21:34:38,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:34:38,536 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:34:38,556 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-03 21:34:38,557 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-03 21:34:38,569 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_82-list_racefree_bound2.i[47038,47051] [2023-08-03 21:34:38,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:34:38,622 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:34:38,622 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:34:38 WrapperNode [2023-08-03 21:34:38,622 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:34:38,623 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:34:38,623 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:34:38,623 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:34:38,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:34:38" (1/1) ... [2023-08-03 21:34:38,654 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:34:38" (1/1) ... [2023-08-03 21:34:38,670 INFO L138 Inliner]: procedures = 278, calls = 61, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 208 [2023-08-03 21:34:38,671 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:34:38,671 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:34:38,671 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:34:38,671 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:34:38,677 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:34:38" (1/1) ... [2023-08-03 21:34:38,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:34:38" (1/1) ... [2023-08-03 21:34:38,680 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:34:38" (1/1) ... [2023-08-03 21:34:38,680 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:34:38" (1/1) ... [2023-08-03 21:34:38,685 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:34:38" (1/1) ... [2023-08-03 21:34:38,688 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:34:38" (1/1) ... [2023-08-03 21:34:38,689 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:34:38" (1/1) ... [2023-08-03 21:34:38,690 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:34:38" (1/1) ... [2023-08-03 21:34:38,692 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:34:38,697 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:34:38,697 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:34:38,697 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:34:38,697 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:34:38" (1/1) ... [2023-08-03 21:34:38,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:34:38,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:34:38,744 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) [2023-08-03 21:34:38,751 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 [2023-08-03 21:34:38,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:34:38,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-03 21:34:38,771 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-03 21:34:38,771 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-03 21:34:38,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:34:38,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:34:38,772 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-03 21:34:38,773 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-03 21:34:38,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:34:38,773 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 21:34:38,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 21:34:38,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:34:38,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-03 21:34:38,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:34:38,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:34:38,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:34:38,775 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 21:34:38,904 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:34:38,905 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:34:39,185 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:34:39,193 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:34:39,193 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-03 21:34:39,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:34:39 BoogieIcfgContainer [2023-08-03 21:34:39,194 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:34:39,195 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:34:39,195 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:34:39,197 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:34:39,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:34:38" (1/3) ... [2023-08-03 21:34:39,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d9e82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:34:39, skipping insertion in model container [2023-08-03 21:34:39,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:34:38" (2/3) ... [2023-08-03 21:34:39,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d9e82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:34:39, skipping insertion in model container [2023-08-03 21:34:39,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:34:39" (3/3) ... [2023-08-03 21:34:39,199 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_82-list_racefree_bound2.i [2023-08-03 21:34:39,203 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:34:39,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:34:39,209 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:34:39,209 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:34:39,268 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 21:34:39,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 210 transitions, 442 flow [2023-08-03 21:34:39,353 INFO L124 PetriNetUnfolderBase]: 52/402 cut-off events. [2023-08-03 21:34:39,354 INFO L125 PetriNetUnfolderBase]: For 8/15 co-relation queries the response was YES. [2023-08-03 21:34:39,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 402 events. 52/402 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1594 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-08-03 21:34:39,366 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 210 transitions, 442 flow [2023-08-03 21:34:39,371 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 208 transitions, 432 flow [2023-08-03 21:34:39,374 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:34:39,379 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 208 transitions, 432 flow [2023-08-03 21:34:39,380 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 208 transitions, 432 flow [2023-08-03 21:34:39,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 208 transitions, 432 flow [2023-08-03 21:34:39,437 INFO L124 PetriNetUnfolderBase]: 48/390 cut-off events. [2023-08-03 21:34:39,438 INFO L125 PetriNetUnfolderBase]: For 4/7 co-relation queries the response was YES. [2023-08-03 21:34:39,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 390 events. 48/390 cut-off events. For 4/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1511 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 194. Up to 8 conditions per place. [2023-08-03 21:34:39,446 INFO L119 LiptonReduction]: Number of co-enabled transitions 12936 [2023-08-03 21:34:44,963 INFO L134 LiptonReduction]: Checked pairs total: 23205 [2023-08-03 21:34:44,963 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-03 21:34:44,972 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:34:44,975 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=true, 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;@4f09edcb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:34:44,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 21:34:44,979 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:34:44,979 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-03 21:34:44,979 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:34:44,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:34:44,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:34:44,980 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:34:44,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:34:44,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1373220507, now seen corresponding path program 1 times [2023-08-03 21:34:44,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:34:44,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897029451] [2023-08-03 21:34:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:34:44,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:34:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:34:45,090 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:34:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:34:45,124 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:34:45,125 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:34:45,126 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 21:34:45,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 21:34:45,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:34:45,127 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:34:45,129 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-03 21:34:45,129 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:34:45,129 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:34:45,166 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 21:34:45,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 327 transitions, 702 flow [2023-08-03 21:34:45,306 INFO L124 PetriNetUnfolderBase]: 191/1195 cut-off events. [2023-08-03 21:34:45,306 INFO L125 PetriNetUnfolderBase]: For 72/107 co-relation queries the response was YES. [2023-08-03 21:34:45,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 1195 events. 191/1195 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7367 event pairs, 2 based on Foata normal form. 0/1005 useless extension candidates. Maximal degree in co-relation 755. Up to 32 conditions per place. [2023-08-03 21:34:45,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 327 transitions, 702 flow [2023-08-03 21:34:45,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 327 transitions, 702 flow [2023-08-03 21:34:45,324 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:34:45,324 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 294 places, 327 transitions, 702 flow [2023-08-03 21:34:45,324 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 294 places, 327 transitions, 702 flow [2023-08-03 21:34:45,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 327 transitions, 702 flow [2023-08-03 21:34:45,478 INFO L124 PetriNetUnfolderBase]: 191/1195 cut-off events. [2023-08-03 21:34:45,479 INFO L125 PetriNetUnfolderBase]: For 72/107 co-relation queries the response was YES. [2023-08-03 21:34:45,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 1195 events. 191/1195 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7367 event pairs, 2 based on Foata normal form. 0/1005 useless extension candidates. Maximal degree in co-relation 755. Up to 32 conditions per place. [2023-08-03 21:34:45,527 INFO L119 LiptonReduction]: Number of co-enabled transitions 53524 [2023-08-03 21:34:51,357 INFO L134 LiptonReduction]: Checked pairs total: 118633 [2023-08-03 21:34:51,358 INFO L136 LiptonReduction]: Total number of compositions: 248 [2023-08-03 21:34:51,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:34:51,360 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=true, 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;@4f09edcb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:34:51,360 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 21:34:51,366 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:34:51,366 INFO L124 PetriNetUnfolderBase]: 11/84 cut-off events. [2023-08-03 21:34:51,366 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2023-08-03 21:34:51,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:34:51,366 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:34:51,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:34:51,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:34:51,367 INFO L85 PathProgramCache]: Analyzing trace with hash 503193650, now seen corresponding path program 1 times [2023-08-03 21:34:51,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:34:51,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036464912] [2023-08-03 21:34:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:34:51,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:34:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:34:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:34:51,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:34:51,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036464912] [2023-08-03 21:34:51,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036464912] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:34:51,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147767018] [2023-08-03 21:34:51,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:34:51,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:34:51,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:34:51,532 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) [2023-08-03 21:34:51,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 21:34:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:34:51,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:34:51,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:34:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:34:51,686 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:34:51,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147767018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:34:51,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:34:51,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 21:34:51,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908692974] [2023-08-03 21:34:51,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:34:51,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:34:51,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:34:51,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:34:51,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:34:51,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 575 [2023-08-03 21:34:51,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 276 flow. Second operand has 5 states, 5 states have (on average 281.6) internal successors, (1408), 5 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:34:51,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:34:51,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 575 [2023-08-03 21:34:51,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:35:57,890 INFO L124 PetriNetUnfolderBase]: 825445/1102444 cut-off events. [2023-08-03 21:35:57,890 INFO L125 PetriNetUnfolderBase]: For 46197/46197 co-relation queries the response was YES. [2023-08-03 21:35:59,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2165283 conditions, 1102444 events. 825445/1102444 cut-off events. For 46197/46197 co-relation queries the response was YES. Maximal size of possible extension queue 21938. Compared 8507570 event pairs, 432825 based on Foata normal form. 75213/1023765 useless extension candidates. Maximal degree in co-relation 341738. Up to 1040985 conditions per place. [2023-08-03 21:36:00,929 INFO L140 encePairwiseOnDemand]: 549/575 looper letters, 79 selfloop transitions, 5 changer transitions 17/115 dead transitions. [2023-08-03 21:36:00,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 115 transitions, 472 flow [2023-08-03 21:36:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:36:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:36:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1522 transitions. [2023-08-03 21:36:00,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5293913043478261 [2023-08-03 21:36:00,945 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1522 transitions. [2023-08-03 21:36:00,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1522 transitions. [2023-08-03 21:36:00,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:36:00,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1522 transitions. [2023-08-03 21:36:00,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 304.4) internal successors, (1522), 5 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:36:00,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 575.0) internal successors, (3450), 6 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:36:00,963 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 575.0) internal successors, (3450), 6 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:36:00,964 INFO L175 Difference]: Start difference. First operand has 89 places, 114 transitions, 276 flow. Second operand 5 states and 1522 transitions. [2023-08-03 21:36:00,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 115 transitions, 472 flow [2023-08-03 21:36:00,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 115 transitions, 466 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:36:00,994 INFO L231 Difference]: Finished difference. Result has 91 places, 77 transitions, 189 flow [2023-08-03 21:36:00,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=189, PETRI_PLACES=91, PETRI_TRANSITIONS=77} [2023-08-03 21:36:00,997 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 2 predicate places. [2023-08-03 21:36:00,997 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 77 transitions, 189 flow [2023-08-03 21:36:00,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 281.6) internal successors, (1408), 5 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:36:00,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:36:00,998 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 21:36:01,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 21:36:01,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:36:01,202 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:36:01,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:36:01,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1608611427, now seen corresponding path program 1 times [2023-08-03 21:36:01,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:36:01,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109181275] [2023-08-03 21:36:01,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:36:01,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:36:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:36:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:36:01,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:36:01,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109181275] [2023-08-03 21:36:01,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109181275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:36:01,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:36:01,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:36:01,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209877201] [2023-08-03 21:36:01,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:36:01,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:36:01,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:36:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:36:01,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:36:01,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 575 [2023-08-03 21:36:01,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 77 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:36:01,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:36:01,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 575 [2023-08-03 21:36:01,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:36:24,028 INFO L124 PetriNetUnfolderBase]: 299480/399260 cut-off events. [2023-08-03 21:36:24,029 INFO L125 PetriNetUnfolderBase]: For 3648/3648 co-relation queries the response was YES. [2023-08-03 21:36:24,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781601 conditions, 399260 events. 299480/399260 cut-off events. For 3648/3648 co-relation queries the response was YES. Maximal size of possible extension queue 8994. Compared 2815542 event pairs, 205120 based on Foata normal form. 1/346684 useless extension candidates. Maximal degree in co-relation 89922. Up to 378393 conditions per place. [2023-08-03 21:36:25,628 INFO L140 encePairwiseOnDemand]: 572/575 looper letters, 68 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-03 21:36:25,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 342 flow [2023-08-03 21:36:25,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:36:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:36:25,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 913 transitions. [2023-08-03 21:36:25,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292753623188405 [2023-08-03 21:36:25,631 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 913 transitions. [2023-08-03 21:36:25,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 913 transitions. [2023-08-03 21:36:25,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:36:25,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 913 transitions. [2023-08-03 21:36:25,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.3333333333333) internal successors, (913), 3 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:36:25,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:36:25,635 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:36:25,636 INFO L175 Difference]: Start difference. First operand has 91 places, 77 transitions, 189 flow. Second operand 3 states and 913 transitions. [2023-08-03 21:36:25,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 342 flow [2023-08-03 21:36:25,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 84 transitions, 339 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 21:36:25,640 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 185 flow [2023-08-03 21:36:25,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2023-08-03 21:36:25,641 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -6 predicate places. [2023-08-03 21:36:25,641 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 185 flow [2023-08-03 21:36:25,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:36:25,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:36:25,642 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:36:25,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:36:25,642 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:36:25,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:36:25,642 INFO L85 PathProgramCache]: Analyzing trace with hash -462213811, now seen corresponding path program 1 times [2023-08-03 21:36:25,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:36:25,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179639592] [2023-08-03 21:36:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:36:25,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:36:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:36:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:36:25,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:36:25,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179639592] [2023-08-03 21:36:25,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179639592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:36:25,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135866851] [2023-08-03 21:36:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:36:25,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:36:25,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:36:25,685 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) [2023-08-03 21:36:25,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 21:36:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:36:25,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:36:25,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:36:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:36:25,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:36:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:36:25,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135866851] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:36:25,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:36:25,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 21:36:25,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510385746] [2023-08-03 21:36:25,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:36:25,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:36:25,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:36:25,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:36:25,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:36:25,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 575 [2023-08-03 21:36:25,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 185 flow. Second operand has 5 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:36:25,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:36:25,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 575 [2023-08-03 21:36:25,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:36:45,401 INFO L124 PetriNetUnfolderBase]: 270243/357095 cut-off events. [2023-08-03 21:36:45,401 INFO L125 PetriNetUnfolderBase]: For 2944/2944 co-relation queries the response was YES. [2023-08-03 21:36:45,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699768 conditions, 357095 events. 270243/357095 cut-off events. For 2944/2944 co-relation queries the response was YES. Maximal size of possible extension queue 8348. Compared 2448987 event pairs, 133096 based on Foata normal form. 8/311518 useless extension candidates. Maximal degree in co-relation 89853. Up to 339173 conditions per place. [2023-08-03 21:36:46,652 INFO L140 encePairwiseOnDemand]: 572/575 looper letters, 79 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2023-08-03 21:36:46,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 96 transitions, 388 flow [2023-08-03 21:36:46,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:36:46,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:36:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1203 transitions. [2023-08-03 21:36:46,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230434782608696 [2023-08-03 21:36:46,655 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1203 transitions. [2023-08-03 21:36:46,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1203 transitions. [2023-08-03 21:36:46,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:36:46,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1203 transitions. [2023-08-03 21:36:46,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 300.75) internal successors, (1203), 4 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:36:46,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 575.0) internal successors, (2875), 5 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:36:46,661 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 575.0) internal successors, (2875), 5 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:36:46,661 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 185 flow. Second operand 4 states and 1203 transitions. [2023-08-03 21:36:46,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 96 transitions, 388 flow [2023-08-03 21:36:46,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 96 transitions, 384 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:36:46,663 INFO L231 Difference]: Finished difference. Result has 84 places, 75 transitions, 182 flow [2023-08-03 21:36:46,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2023-08-03 21:36:46,664 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -5 predicate places. [2023-08-03 21:36:46,664 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 182 flow [2023-08-03 21:36:46,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:36:46,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:36:46,665 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:36:46,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 21:36:46,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 21:36:46,869 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:36:46,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:36:46,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1409734442, now seen corresponding path program 1 times [2023-08-03 21:36:46,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:36:46,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940656658] [2023-08-03 21:36:46,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:36:46,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:36:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:36:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:36:46,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:36:46,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940656658] [2023-08-03 21:36:46,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940656658] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:36:46,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963566871] [2023-08-03 21:36:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:36:46,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:36:46,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:36:46,959 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) [2023-08-03 21:36:46,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 21:36:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:36:47,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:36:47,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:36:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:36:47,085 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:36:47,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963566871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:36:47,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:36:47,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 21:36:47,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482639766] [2023-08-03 21:36:47,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:36:47,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:36:47,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:36:47,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:36:47,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:36:47,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 575 [2023-08-03 21:36:47,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:36:47,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:36:47,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 575 [2023-08-03 21:36:47,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:37:00,818 INFO L124 PetriNetUnfolderBase]: 196352/257912 cut-off events. [2023-08-03 21:37:00,819 INFO L125 PetriNetUnfolderBase]: For 1378/1378 co-relation queries the response was YES. [2023-08-03 21:37:01,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514822 conditions, 257912 events. 196352/257912 cut-off events. For 1378/1378 co-relation queries the response was YES. Maximal size of possible extension queue 6171. Compared 1717984 event pairs, 160 based on Foata normal form. 0/238021 useless extension candidates. Maximal degree in co-relation 316199. Up to 174896 conditions per place. [2023-08-03 21:37:01,273 INFO L140 encePairwiseOnDemand]: 571/575 looper letters, 0 selfloop transitions, 0 changer transitions 170/170 dead transitions. [2023-08-03 21:37:01,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 170 transitions, 684 flow [2023-08-03 21:37:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:37:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:37:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1557 transitions. [2023-08-03 21:37:01,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5415652173913044 [2023-08-03 21:37:01,276 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1557 transitions. [2023-08-03 21:37:01,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1557 transitions. [2023-08-03 21:37:01,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:37:01,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1557 transitions. [2023-08-03 21:37:01,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 311.4) internal successors, (1557), 5 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:37:01,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 575.0) internal successors, (3450), 6 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:37:01,283 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 575.0) internal successors, (3450), 6 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:37:01,283 INFO L175 Difference]: Start difference. First operand has 84 places, 75 transitions, 182 flow. Second operand 5 states and 1557 transitions. [2023-08-03 21:37:01,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 170 transitions, 684 flow [2023-08-03 21:37:01,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 170 transitions, 677 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 21:37:01,404 INFO L231 Difference]: Finished difference. Result has 83 places, 0 transitions, 0 flow [2023-08-03 21:37:01,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=83, PETRI_TRANSITIONS=0} [2023-08-03 21:37:01,404 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -6 predicate places. [2023-08-03 21:37:01,404 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 0 transitions, 0 flow [2023-08-03 21:37:01,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:37:01,405 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 21:37:01,405 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 21:37:01,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-03 21:37:01,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:37:01,606 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-03 21:37:01,606 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-03 21:37:01,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 327 transitions, 702 flow [2023-08-03 21:37:01,719 INFO L124 PetriNetUnfolderBase]: 191/1195 cut-off events. [2023-08-03 21:37:01,719 INFO L125 PetriNetUnfolderBase]: For 72/107 co-relation queries the response was YES. [2023-08-03 21:37:01,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 1195 events. 191/1195 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7367 event pairs, 2 based on Foata normal form. 0/1005 useless extension candidates. Maximal degree in co-relation 755. Up to 32 conditions per place. [2023-08-03 21:37:01,728 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 327 transitions, 702 flow [2023-08-03 21:37:01,732 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 326 transitions, 696 flow [2023-08-03 21:37:01,732 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:37:01,732 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 326 transitions, 696 flow [2023-08-03 21:37:01,733 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 326 transitions, 696 flow [2023-08-03 21:37:01,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 326 transitions, 696 flow [2023-08-03 21:37:01,841 INFO L124 PetriNetUnfolderBase]: 191/1194 cut-off events. [2023-08-03 21:37:01,841 INFO L125 PetriNetUnfolderBase]: For 71/99 co-relation queries the response was YES. [2023-08-03 21:37:01,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1289 conditions, 1194 events. 191/1194 cut-off events. For 71/99 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7416 event pairs, 2 based on Foata normal form. 0/1004 useless extension candidates. Maximal degree in co-relation 755. Up to 32 conditions per place. [2023-08-03 21:37:01,882 INFO L119 LiptonReduction]: Number of co-enabled transitions 53432 [2023-08-03 21:37:07,907 INFO L134 LiptonReduction]: Checked pairs total: 107669 [2023-08-03 21:37:07,907 INFO L136 LiptonReduction]: Total number of compositions: 245 [2023-08-03 21:37:07,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:37:07,910 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=true, 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;@4f09edcb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:37:07,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 21:37:07,916 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:37:07,916 INFO L124 PetriNetUnfolderBase]: 9/84 cut-off events. [2023-08-03 21:37:07,916 INFO L125 PetriNetUnfolderBase]: For 5/7 co-relation queries the response was YES. [2023-08-03 21:37:07,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:37:07,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:37:07,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:37:07,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:37:07,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1197165647, now seen corresponding path program 1 times [2023-08-03 21:37:07,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:37:07,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566331582] [2023-08-03 21:37:07,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:37:07,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:37:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:37:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:37:07,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:37:07,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566331582] [2023-08-03 21:37:07,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566331582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:37:07,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:37:07,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:37:07,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522847297] [2023-08-03 21:37:07,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:37:07,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:37:07,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:37:07,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:37:07,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:37:07,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 572 [2023-08-03 21:37:07,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:37:07,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:37:07,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 572 [2023-08-03 21:37:07,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand