/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_81-list_racing_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:33:50,364 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:33:50,432 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:33:50,438 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:33:50,439 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:33:50,439 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:33:50,439 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:33:50,469 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:33:50,470 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:33:50,470 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:33:50,471 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:33:50,471 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:33:50,471 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:33:50,472 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:33:50,472 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:33:50,472 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:33:50,477 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:33:50,481 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:33:50,481 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:33:50,481 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:33:50,483 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:33:50,483 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:33:50,483 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:33:50,483 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:33:50,483 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:33:50,484 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:33:50,484 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:33:50,484 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:33:50,485 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:33:50,485 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:33:50,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:33:50,486 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:33:50,486 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:33:50,486 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:33:50,486 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:33:50,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:33:50,486 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:33:50,487 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:33:50,487 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:33:50,487 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:33:50,487 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:33:50,487 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:33:50,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:33:50,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:33:50,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:33:50,750 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:33:50,750 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:33:50,751 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_81-list_racing_bound2.i [2023-08-03 21:33:51,941 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:33:52,182 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:33:52,183 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_81-list_racing_bound2.i [2023-08-03 21:33:52,198 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1df4ee47/5381cae43d8f4b12bf04ab4729636375/FLAGec9e2f0c6 [2023-08-03 21:33:52,210 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1df4ee47/5381cae43d8f4b12bf04ab4729636375 [2023-08-03 21:33:52,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:33:52,213 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:33:52,214 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:33:52,214 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:33:52,219 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:33:52,219 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:33:52" (1/1) ... [2023-08-03 21:33:52,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63432c4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:33:52, skipping insertion in model container [2023-08-03 21:33:52,220 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:33:52" (1/1) ... [2023-08-03 21:33:52,266 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:33:52,626 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_81-list_racing_bound2.i[47038,47051] [2023-08-03 21:33:52,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:33:52,676 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:33:52,706 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-03 21:33:52,707 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-03 21:33:52,721 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_81-list_racing_bound2.i[47038,47051] [2023-08-03 21:33:52,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:33:52,813 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:33:52,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:33:52 WrapperNode [2023-08-03 21:33:52,813 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:33:52,814 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:33:52,814 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:33:52,814 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:33:52,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:33:52" (1/1) ... [2023-08-03 21:33:52,850 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:33:52" (1/1) ... [2023-08-03 21:33:52,884 INFO L138 Inliner]: procedures = 278, calls = 54, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 206 [2023-08-03 21:33:52,884 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:33:52,885 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:33:52,885 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:33:52,885 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:33:52,912 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:33:52" (1/1) ... [2023-08-03 21:33:52,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:33:52" (1/1) ... [2023-08-03 21:33:52,926 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:33:52" (1/1) ... [2023-08-03 21:33:52,928 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:33:52" (1/1) ... [2023-08-03 21:33:52,936 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:33:52" (1/1) ... [2023-08-03 21:33:52,939 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:33:52" (1/1) ... [2023-08-03 21:33:52,940 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:33:52" (1/1) ... [2023-08-03 21:33:52,942 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:33:52" (1/1) ... [2023-08-03 21:33:52,949 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:33:52,950 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:33:52,950 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:33:52,950 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:33:52,951 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:33:52" (1/1) ... [2023-08-03 21:33:52,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:33:52,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:33:52,979 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 21:33:52,985 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 21:33:53,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:33:53,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-03 21:33:53,011 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-03 21:33:53,011 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-03 21:33:53,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:33:53,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:33:53,012 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-03 21:33:53,012 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-03 21:33:53,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:33:53,012 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 21:33:53,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 21:33:53,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:33:53,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-03 21:33:53,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:33:53,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:33:53,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:33:53,014 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 21:33:53,135 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:33:53,137 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:33:53,429 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:33:53,435 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:33:53,435 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-03 21:33:53,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:33:53 BoogieIcfgContainer [2023-08-03 21:33:53,437 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:33:53,440 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:33:53,440 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:33:53,443 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:33:53,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:33:52" (1/3) ... [2023-08-03 21:33:53,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7049304a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:33:53, skipping insertion in model container [2023-08-03 21:33:53,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:33:52" (2/3) ... [2023-08-03 21:33:53,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7049304a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:33:53, skipping insertion in model container [2023-08-03 21:33:53,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:33:53" (3/3) ... [2023-08-03 21:33:53,447 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_81-list_racing_bound2.i [2023-08-03 21:33:53,453 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:33:53,461 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:33:53,461 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:33:53,461 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:33:53,531 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 21:33:53,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 209 transitions, 440 flow [2023-08-03 21:33:53,656 INFO L124 PetriNetUnfolderBase]: 52/398 cut-off events. [2023-08-03 21:33:53,657 INFO L125 PetriNetUnfolderBase]: For 8/15 co-relation queries the response was YES. [2023-08-03 21:33:53,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 398 events. 52/398 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1606 event pairs, 0 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2023-08-03 21:33:53,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 209 transitions, 440 flow [2023-08-03 21:33:53,687 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 207 transitions, 430 flow [2023-08-03 21:33:53,691 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:33:53,705 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 207 transitions, 430 flow [2023-08-03 21:33:53,708 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 207 transitions, 430 flow [2023-08-03 21:33:53,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 207 transitions, 430 flow [2023-08-03 21:33:53,766 INFO L124 PetriNetUnfolderBase]: 48/386 cut-off events. [2023-08-03 21:33:53,766 INFO L125 PetriNetUnfolderBase]: For 4/7 co-relation queries the response was YES. [2023-08-03 21:33:53,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 386 events. 48/386 cut-off events. For 4/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1533 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 193. Up to 8 conditions per place. [2023-08-03 21:33:53,779 INFO L119 LiptonReduction]: Number of co-enabled transitions 12564 [2023-08-03 21:33:59,658 INFO L134 LiptonReduction]: Checked pairs total: 21299 [2023-08-03 21:33:59,658 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-03 21:33:59,668 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:33:59,673 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;@7ba892d7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:33:59,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 21:33:59,678 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:33:59,678 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-03 21:33:59,678 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:33:59,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:33:59,679 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:33:59,679 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:33:59,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:33:59,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1532212723, now seen corresponding path program 1 times [2023-08-03 21:33:59,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:33:59,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495531250] [2023-08-03 21:33:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:33:59,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:33:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:33:59,858 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:33:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:33:59,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:33:59,921 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:33:59,922 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 21:33:59,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 21:33:59,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:33:59,924 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:33:59,926 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-03 21:33:59,927 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:33:59,927 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:33:59,981 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 21:33:59,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 323 transitions, 694 flow [2023-08-03 21:34:00,169 INFO L124 PetriNetUnfolderBase]: 191/1179 cut-off events. [2023-08-03 21:34:00,169 INFO L125 PetriNetUnfolderBase]: For 72/95 co-relation queries the response was YES. [2023-08-03 21:34:00,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 1179 events. 191/1179 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7271 event pairs, 2 based on Foata normal form. 0/992 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-08-03 21:34:00,188 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 323 transitions, 694 flow [2023-08-03 21:34:00,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 323 transitions, 694 flow [2023-08-03 21:34:00,198 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:34:00,198 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 323 transitions, 694 flow [2023-08-03 21:34:00,198 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 323 transitions, 694 flow [2023-08-03 21:34:00,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 323 transitions, 694 flow [2023-08-03 21:34:00,370 INFO L124 PetriNetUnfolderBase]: 191/1179 cut-off events. [2023-08-03 21:34:00,370 INFO L125 PetriNetUnfolderBase]: For 72/95 co-relation queries the response was YES. [2023-08-03 21:34:00,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 1179 events. 191/1179 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7271 event pairs, 2 based on Foata normal form. 0/992 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-08-03 21:34:00,438 INFO L119 LiptonReduction]: Number of co-enabled transitions 51412 [2023-08-03 21:34:07,352 INFO L134 LiptonReduction]: Checked pairs total: 101735 [2023-08-03 21:34:07,353 INFO L136 LiptonReduction]: Total number of compositions: 249 [2023-08-03 21:34:07,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:34:07,356 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;@7ba892d7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:34:07,356 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 21:34:07,363 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:34:07,363 INFO L124 PetriNetUnfolderBase]: 13/88 cut-off events. [2023-08-03 21:34:07,364 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 21:34:07,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:34:07,364 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:34:07,364 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:34:07,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:34:07,364 INFO L85 PathProgramCache]: Analyzing trace with hash -792283344, now seen corresponding path program 1 times [2023-08-03 21:34:07,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:34:07,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17388281] [2023-08-03 21:34:07,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:34:07,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:34:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:34:07,513 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 21:34:07,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:34:07,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17388281] [2023-08-03 21:34:07,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17388281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:34:07,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385220751] [2023-08-03 21:34:07,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:34:07,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:34:07,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:34:07,521 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 21:34:07,533 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 21:34:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:34:07,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:34:07,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:34:07,737 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 21:34:07,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:34:07,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385220751] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:34:07,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:34:07,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 21:34:07,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501557819] [2023-08-03 21:34:07,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:34:07,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:34:07,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:34:07,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:34:07,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:34:07,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 572 [2023-08-03 21:34:07,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 112 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 277.6) internal successors, (1388), 5 states have internal predecessors, (1388), 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 21:34:07,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:34:07,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 572 [2023-08-03 21:34:07,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:35:20,319 INFO L124 PetriNetUnfolderBase]: 784846/1052633 cut-off events. [2023-08-03 21:35:20,319 INFO L125 PetriNetUnfolderBase]: For 44440/44440 co-relation queries the response was YES. [2023-08-03 21:35:22,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2063611 conditions, 1052633 events. 784846/1052633 cut-off events. For 44440/44440 co-relation queries the response was YES. Maximal size of possible extension queue 20818. Compared 8110212 event pairs, 410380 based on Foata normal form. 84504/988982 useless extension candidates. Maximal degree in co-relation 325479. Up to 989685 conditions per place. [2023-08-03 21:35:24,167 INFO L140 encePairwiseOnDemand]: 546/572 looper letters, 78 selfloop transitions, 5 changer transitions 17/113 dead transitions. [2023-08-03 21:35:24,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 466 flow [2023-08-03 21:35:24,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:35:24,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:35:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1501 transitions. [2023-08-03 21:35:24,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5248251748251749 [2023-08-03 21:35:24,185 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1501 transitions. [2023-08-03 21:35:24,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1501 transitions. [2023-08-03 21:35:24,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:35:24,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1501 transitions. [2023-08-03 21:35:24,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 300.2) internal successors, (1501), 5 states have internal predecessors, (1501), 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 21:35:24,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 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 21:35:24,218 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 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 21:35:24,220 INFO L175 Difference]: Start difference. First operand has 87 places, 112 transitions, 272 flow. Second operand 5 states and 1501 transitions. [2023-08-03 21:35:24,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 466 flow [2023-08-03 21:35:24,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 113 transitions, 460 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:35:24,259 INFO L231 Difference]: Finished difference. Result has 89 places, 75 transitions, 185 flow [2023-08-03 21:35:24,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2023-08-03 21:35:24,264 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 2 predicate places. [2023-08-03 21:35:24,264 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 185 flow [2023-08-03 21:35:24,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 277.6) internal successors, (1388), 5 states have internal predecessors, (1388), 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 21:35:24,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:35:24,265 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 21:35:24,274 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 21:35:24,470 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 21:35:24,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:35:24,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:35:24,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1268436408, now seen corresponding path program 1 times [2023-08-03 21:35:24,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:35:24,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476780138] [2023-08-03 21:35:24,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:35:24,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:35:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:35:24,563 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 21:35:24,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:35:24,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476780138] [2023-08-03 21:35:24,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476780138] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:35:24,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:35:24,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:35:24,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780816209] [2023-08-03 21:35:24,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:35:24,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:35:24,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:35:24,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:35:24,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:35:24,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 572 [2023-08-03 21:35:24,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 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 21:35:24,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:35:24,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 572 [2023-08-03 21:35:24,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:35:51,673 INFO L124 PetriNetUnfolderBase]: 285208/381660 cut-off events. [2023-08-03 21:35:51,673 INFO L125 PetriNetUnfolderBase]: For 3904/3904 co-relation queries the response was YES. [2023-08-03 21:35:52,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 746209 conditions, 381660 events. 285208/381660 cut-off events. For 3904/3904 co-relation queries the response was YES. Maximal size of possible extension queue 8706. Compared 2694044 event pairs, 194944 based on Foata normal form. 1/331469 useless extension candidates. Maximal degree in co-relation 85841. Up to 360281 conditions per place. [2023-08-03 21:35:53,392 INFO L140 encePairwiseOnDemand]: 569/572 looper letters, 67 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-03 21:35:53,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 336 flow [2023-08-03 21:35:53,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:35:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:35:53,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 900 transitions. [2023-08-03 21:35:53,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244755244755245 [2023-08-03 21:35:53,397 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 900 transitions. [2023-08-03 21:35:53,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 900 transitions. [2023-08-03 21:35:53,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:35:53,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 900 transitions. [2023-08-03 21:35:53,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:35:53,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 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 21:35:53,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 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 21:35:53,404 INFO L175 Difference]: Start difference. First operand has 89 places, 75 transitions, 185 flow. Second operand 3 states and 900 transitions. [2023-08-03 21:35:53,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 336 flow [2023-08-03 21:35:53,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 333 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 21:35:53,410 INFO L231 Difference]: Finished difference. Result has 81 places, 74 transitions, 181 flow [2023-08-03 21:35:53,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=81, PETRI_TRANSITIONS=74} [2023-08-03 21:35:53,410 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -6 predicate places. [2023-08-03 21:35:53,411 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 74 transitions, 181 flow [2023-08-03 21:35:53,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 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 21:35:53,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:35:53,411 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:35:53,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:35:53,412 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:35:53,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:35:53,412 INFO L85 PathProgramCache]: Analyzing trace with hash 60760769, now seen corresponding path program 1 times [2023-08-03 21:35:53,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:35:53,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484464893] [2023-08-03 21:35:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:35:53,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:35:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:35:53,490 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 21:35:53,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:35:53,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484464893] [2023-08-03 21:35:53,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484464893] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:35:53,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573812957] [2023-08-03 21:35:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:35:53,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:35:53,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:35:53,494 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 21:35:53,497 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 21:35:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:35:53,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:35:53,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:35:53,654 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 21:35:53,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:35:53,672 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 21:35:53,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573812957] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:35:53,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:35:53,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 21:35:53,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306051927] [2023-08-03 21:35:53,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:35:53,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:35:53,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:35:53,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:35:53,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:35:53,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 572 [2023-08-03 21:35:53,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 278.6) internal successors, (1393), 5 states have internal predecessors, (1393), 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 21:35:53,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:35:53,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 572 [2023-08-03 21:35:53,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:36:14,858 INFO L124 PetriNetUnfolderBase]: 257371/341535 cut-off events. [2023-08-03 21:36:14,858 INFO L125 PetriNetUnfolderBase]: For 3104/3104 co-relation queries the response was YES. [2023-08-03 21:36:15,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668144 conditions, 341535 events. 257371/341535 cut-off events. For 3104/3104 co-relation queries the response was YES. Maximal size of possible extension queue 8128. Compared 2343901 event pairs, 115976 based on Foata normal form. 8/297751 useless extension candidates. Maximal degree in co-relation 85788. Up to 322941 conditions per place. [2023-08-03 21:36:16,346 INFO L140 encePairwiseOnDemand]: 569/572 looper letters, 78 selfloop transitions, 3 changer transitions 0/94 dead transitions. [2023-08-03 21:36:16,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 94 transitions, 382 flow [2023-08-03 21:36:16,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:36:16,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:36:16,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1186 transitions. [2023-08-03 21:36:16,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5183566433566433 [2023-08-03 21:36:16,350 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1186 transitions. [2023-08-03 21:36:16,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1186 transitions. [2023-08-03 21:36:16,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:36:16,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1186 transitions. [2023-08-03 21:36:16,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.5) internal successors, (1186), 4 states have internal predecessors, (1186), 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 21:36:16,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 572.0) internal successors, (2860), 5 states have internal predecessors, (2860), 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 21:36:16,358 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 572.0) internal successors, (2860), 5 states have internal predecessors, (2860), 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 21:36:16,358 INFO L175 Difference]: Start difference. First operand has 81 places, 74 transitions, 181 flow. Second operand 4 states and 1186 transitions. [2023-08-03 21:36:16,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 94 transitions, 382 flow [2023-08-03 21:36:16,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 94 transitions, 378 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:36:16,363 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 178 flow [2023-08-03 21:36:16,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2023-08-03 21:36:16,364 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -5 predicate places. [2023-08-03 21:36:16,364 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 178 flow [2023-08-03 21:36:16,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.6) internal successors, (1393), 5 states have internal predecessors, (1393), 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 21:36:16,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:36:16,365 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:36:16,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 21:36:16,569 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 21:36:16,570 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:36:16,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:36:16,570 INFO L85 PathProgramCache]: Analyzing trace with hash 753399897, now seen corresponding path program 1 times [2023-08-03 21:36:16,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:36:16,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749269427] [2023-08-03 21:36:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:36:16,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:36:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:36:16,656 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 21:36:16,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:36:16,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749269427] [2023-08-03 21:36:16,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749269427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:36:16,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371779998] [2023-08-03 21:36:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:36:16,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:36:16,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:36:16,659 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 21:36:16,665 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 21:36:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:36:16,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:36:16,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:36:16,808 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 21:36:16,809 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:36:16,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371779998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:36:16,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:36:16,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 21:36:16,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029109744] [2023-08-03 21:36:16,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:36:16,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:36:16,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:36:16,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:36:16,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:36:16,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 572 [2023-08-03 21:36:16,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 278.6) internal successors, (1393), 5 states have internal predecessors, (1393), 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 21:36:16,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:36:16,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 572 [2023-08-03 21:36:16,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:36:32,030 INFO L124 PetriNetUnfolderBase]: 189329/249321 cut-off events. [2023-08-03 21:36:32,030 INFO L125 PetriNetUnfolderBase]: For 1434/1434 co-relation queries the response was YES. [2023-08-03 21:36:32,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494672 conditions, 249321 events. 189329/249321 cut-off events. For 1434/1434 co-relation queries the response was YES. Maximal size of possible extension queue 6128. Compared 1650597 event pairs, 7216 based on Foata normal form. 0/229879 useless extension candidates. Maximal degree in co-relation 303852. Up to 166095 conditions per place. [2023-08-03 21:36:32,666 INFO L140 encePairwiseOnDemand]: 568/572 looper letters, 0 selfloop transitions, 0 changer transitions 168/168 dead transitions. [2023-08-03 21:36:32,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 168 transitions, 678 flow [2023-08-03 21:36:32,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:36:32,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:36:32,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1536 transitions. [2023-08-03 21:36:32,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370629370629371 [2023-08-03 21:36:32,670 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1536 transitions. [2023-08-03 21:36:32,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1536 transitions. [2023-08-03 21:36:32,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:36:32,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1536 transitions. [2023-08-03 21:36:32,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 307.2) internal successors, (1536), 5 states have internal predecessors, (1536), 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 21:36:32,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 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 21:36:32,680 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 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 21:36:32,680 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 178 flow. Second operand 5 states and 1536 transitions. [2023-08-03 21:36:32,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 168 transitions, 678 flow [2023-08-03 21:36:32,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 168 transitions, 671 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 21:36:32,863 INFO L231 Difference]: Finished difference. Result has 81 places, 0 transitions, 0 flow [2023-08-03 21:36:32,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=81, PETRI_TRANSITIONS=0} [2023-08-03 21:36:32,864 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -6 predicate places. [2023-08-03 21:36:32,864 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 0 transitions, 0 flow [2023-08-03 21:36:32,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.6) internal successors, (1393), 5 states have internal predecessors, (1393), 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 21:36:32,865 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 21:36:32,865 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 21:36:32,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 21:36:33,072 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 21:36:33,072 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-03 21:36:33,073 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-03 21:36:33,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 323 transitions, 694 flow [2023-08-03 21:36:33,360 INFO L124 PetriNetUnfolderBase]: 191/1179 cut-off events. [2023-08-03 21:36:33,360 INFO L125 PetriNetUnfolderBase]: For 72/95 co-relation queries the response was YES. [2023-08-03 21:36:33,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 1179 events. 191/1179 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7271 event pairs, 2 based on Foata normal form. 0/992 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-08-03 21:36:33,370 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 323 transitions, 694 flow [2023-08-03 21:36:33,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 322 transitions, 688 flow [2023-08-03 21:36:33,376 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:36:33,376 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 289 places, 322 transitions, 688 flow [2023-08-03 21:36:33,377 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 289 places, 322 transitions, 688 flow [2023-08-03 21:36:33,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 322 transitions, 688 flow [2023-08-03 21:36:33,468 INFO L124 PetriNetUnfolderBase]: 191/1178 cut-off events. [2023-08-03 21:36:33,468 INFO L125 PetriNetUnfolderBase]: For 71/87 co-relation queries the response was YES. [2023-08-03 21:36:33,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273 conditions, 1178 events. 191/1178 cut-off events. For 71/87 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7318 event pairs, 2 based on Foata normal form. 0/991 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-08-03 21:36:33,519 INFO L119 LiptonReduction]: Number of co-enabled transitions 51320 [2023-08-03 21:36:39,756 INFO L134 LiptonReduction]: Checked pairs total: 101526 [2023-08-03 21:36:39,756 INFO L136 LiptonReduction]: Total number of compositions: 249 [2023-08-03 21:36:39,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:36:39,758 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;@7ba892d7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:36:39,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 21:36:39,763 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:36:39,763 INFO L124 PetriNetUnfolderBase]: 5/54 cut-off events. [2023-08-03 21:36:39,763 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-03 21:36:39,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:36:39,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:36:39,763 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 21:36:39,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:36:39,763 INFO L85 PathProgramCache]: Analyzing trace with hash 2020941670, now seen corresponding path program 1 times [2023-08-03 21:36:39,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:36:39,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047661675] [2023-08-03 21:36:39,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:36:39,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:36:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:36:39,799 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 21:36:39,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:36:39,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047661675] [2023-08-03 21:36:39,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047661675] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:36:39,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:36:39,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:36:39,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651077779] [2023-08-03 21:36:39,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:36:39,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:36:39,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:36:39,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:36:39,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:36:39,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 572 [2023-08-03 21:36:39,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 111 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 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 21:36:39,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:36:39,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 572 [2023-08-03 21:36:39,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:37:51,045 INFO L124 PetriNetUnfolderBase]: 783305/1049365 cut-off events. [2023-08-03 21:37:51,046 INFO L125 PetriNetUnfolderBase]: For 44714/44714 co-relation queries the response was YES. [2023-08-03 21:37:53,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2057420 conditions, 1049365 events. 783305/1049365 cut-off events. For 44714/44714 co-relation queries the response was YES. Maximal size of possible extension queue 21026. Compared 8035097 event pairs, 546616 based on Foata normal form. 84048/984301 useless extension candidates. Maximal degree in co-relation 325080. Up to 987090 conditions per place. [2023-08-03 21:37:55,782 INFO L140 encePairwiseOnDemand]: 547/572 looper letters, 81 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-03 21:37:55,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 98 transitions, 406 flow [2023-08-03 21:37:55,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:37:55,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:37:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 937 transitions. [2023-08-03 21:37:55,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546037296037296 [2023-08-03 21:37:55,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 937 transitions. [2023-08-03 21:37:55,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 937 transitions. [2023-08-03 21:37:55,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:37:55,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 937 transitions. [2023-08-03 21:37:55,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 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 21:37:55,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 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 21:37:55,791 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 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 21:37:55,791 INFO L175 Difference]: Start difference. First operand has 86 places, 111 transitions, 266 flow. Second operand 3 states and 937 transitions. [2023-08-03 21:37:55,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 98 transitions, 406 flow [2023-08-03 21:37:55,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 98 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:37:55,966 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 231 flow [2023-08-03 21:37:55,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=231, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2023-08-03 21:37:55,967 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2023-08-03 21:37:55,967 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 231 flow [2023-08-03 21:37:55,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 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 21:37:55,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:37:55,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:37:55,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 21:37:55,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:37:55,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:37:55,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1094379120, now seen corresponding path program 1 times [2023-08-03 21:37:55,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:37:55,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712985747] [2023-08-03 21:37:55,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:37:55,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:37:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:37:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:37:56,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:37:56,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712985747] [2023-08-03 21:37:56,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712985747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:37:56,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458015868] [2023-08-03 21:37:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:37:56,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:37:56,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:37:56,025 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:37:56,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 21:37:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:37:56,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:37:56,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:37:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:37:56,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:37:56,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:37:56,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458015868] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:37:56,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:37:56,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 21:37:56,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059725950] [2023-08-03 21:37:56,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:37:56,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:37:56,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:37:56,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:37:56,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:37:56,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 572 [2023-08-03 21:37:56,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 279.4) internal successors, (1397), 5 states have internal predecessors, (1397), 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 21:37:56,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:37:56,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 572 [2023-08-03 21:37:56,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:39:02,590 INFO L124 PetriNetUnfolderBase]: 760551/1012771 cut-off events. [2023-08-03 21:39:02,591 INFO L125 PetriNetUnfolderBase]: For 32214/32214 co-relation queries the response was YES. [2023-08-03 21:39:04,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1990675 conditions, 1012771 events. 760551/1012771 cut-off events. For 32214/32214 co-relation queries the response was YES. Maximal size of possible extension queue 20215. Compared 7622969 event pairs, 397622 based on Foata normal form. 8/870899 useless extension candidates. Maximal degree in co-relation 363110. Up to 956912 conditions per place. [2023-08-03 21:39:07,370 INFO L140 encePairwiseOnDemand]: 568/572 looper letters, 93 selfloop transitions, 3 changer transitions 1/112 dead transitions. [2023-08-03 21:39:07,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 112 transitions, 469 flow [2023-08-03 21:39:07,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:39:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:39:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1202 transitions. [2023-08-03 21:39:07,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253496503496503 [2023-08-03 21:39:07,373 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1202 transitions. [2023-08-03 21:39:07,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1202 transitions. [2023-08-03 21:39:07,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:39:07,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1202 transitions. [2023-08-03 21:39:07,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 300.5) internal successors, (1202), 4 states have internal predecessors, (1202), 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 21:39:07,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 572.0) internal successors, (2860), 5 states have internal predecessors, (2860), 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 21:39:07,379 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 572.0) internal successors, (2860), 5 states have internal predecessors, (2860), 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 21:39:07,379 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 231 flow. Second operand 4 states and 1202 transitions. [2023-08-03 21:39:07,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 112 transitions, 469 flow [2023-08-03 21:39:07,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 112 transitions, 467 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:39:07,391 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 243 flow [2023-08-03 21:39:07,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=243, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2023-08-03 21:39:07,392 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 6 predicate places. [2023-08-03 21:39:07,392 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 243 flow [2023-08-03 21:39:07,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 279.4) internal successors, (1397), 5 states have internal predecessors, (1397), 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 21:39:07,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:39:07,392 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:39:07,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 21:39:07,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:39:07,593 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:39:07,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:39:07,594 INFO L85 PathProgramCache]: Analyzing trace with hash -119068126, now seen corresponding path program 1 times [2023-08-03 21:39:07,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:39:07,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891911948] [2023-08-03 21:39:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:39:07,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:39:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:39:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:39:08,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:39:08,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891911948] [2023-08-03 21:39:08,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891911948] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:39:08,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136026892] [2023-08-03 21:39:08,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:39:08,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:39:08,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:39:08,182 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:39:08,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 21:39:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:39:08,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-03 21:39:08,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:39:08,378 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-08-03 21:39:08,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:39:08,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-08-03 21:39:08,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:39:08,429 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:39:08,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:39:08,491 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:39:08,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:39:08,587 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-03 21:39:08,588 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-03 21:39:08,617 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:39:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:39:08,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:39:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:39:08,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136026892] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:39:08,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:39:08,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-08-03 21:39:08,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614935172] [2023-08-03 21:39:08,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:39:08,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-03 21:39:08,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:39:08,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-03 21:39:08,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=215, Unknown=5, NotChecked=0, Total=272 [2023-08-03 21:39:11,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:39:12,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:39:12,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 572 [2023-08-03 21:39:12,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 243 flow. Second operand has 17 states, 17 states have (on average 217.41176470588235) internal successors, (3696), 17 states have internal predecessors, (3696), 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 21:39:12,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:39:12,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 572 [2023-08-03 21:39:12,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand