/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/increased_bounds/pthread-wmm_mix011.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:12:24,122 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:12:24,179 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:12:24,183 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:12:24,183 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:12:24,184 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:12:24,184 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:12:24,208 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:12:24,208 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:12:24,208 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:12:24,209 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:12:24,209 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:12:24,209 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:12:24,210 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:12:24,210 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:12:24,210 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:12:24,210 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:12:24,210 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:12:24,211 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:12:24,211 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:12:24,211 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:12:24,212 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:12:24,212 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:12:24,212 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:12:24,213 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:12:24,213 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:12:24,213 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:12:24,213 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:12:24,213 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:12:24,214 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:12:24,214 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:12:24,214 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:12:24,214 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:12:24,214 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:12:24,215 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:12:24,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:12:24,215 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:12:24,215 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:12:24,215 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:12:24,215 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:12:24,215 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:12:24,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:12:24,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:12:24,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:12:24,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:12:24,368 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:12:24,369 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:12:24,369 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix011.opt_bound2.i [2023-08-03 23:12:25,276 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:12:25,445 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:12:25,445 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix011.opt_bound2.i [2023-08-03 23:12:25,456 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d817162e/94db92734ab240ef976f1d82a42a9587/FLAGe087d95e3 [2023-08-03 23:12:25,466 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d817162e/94db92734ab240ef976f1d82a42a9587 [2023-08-03 23:12:25,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:12:25,468 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:12:25,469 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:12:25,469 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:12:25,471 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:12:25,471 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:12:25" (1/1) ... [2023-08-03 23:12:25,472 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1430ed99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:25, skipping insertion in model container [2023-08-03 23:12:25,472 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:12:25" (1/1) ... [2023-08-03 23:12:25,495 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:12:25,583 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix011.opt_bound2.i[944,957] [2023-08-03 23:12:25,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:12:25,746 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:12:25,754 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix011.opt_bound2.i[944,957] [2023-08-03 23:12:25,770 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:12:25,772 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:12:25,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:12:25,829 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:12:25,829 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:12:25,834 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:12:25,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:25 WrapperNode [2023-08-03 23:12:25,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:12:25,838 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:12:25,838 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:12:25,838 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:12:25,842 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:25" (1/1) ... [2023-08-03 23:12:25,867 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:25" (1/1) ... [2023-08-03 23:12:25,897 INFO L138 Inliner]: procedures = 176, calls = 60, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 175 [2023-08-03 23:12:25,898 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:12:25,898 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:12:25,898 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:12:25,898 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:12:25,904 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:25" (1/1) ... [2023-08-03 23:12:25,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:25" (1/1) ... [2023-08-03 23:12:25,914 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:25" (1/1) ... [2023-08-03 23:12:25,914 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:25" (1/1) ... [2023-08-03 23:12:25,923 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:25" (1/1) ... [2023-08-03 23:12:25,925 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:25" (1/1) ... [2023-08-03 23:12:25,929 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:25" (1/1) ... [2023-08-03 23:12:25,930 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:25" (1/1) ... [2023-08-03 23:12:25,932 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:12:25,932 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:12:25,932 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:12:25,932 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:12:25,933 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:25" (1/1) ... [2023-08-03 23:12:25,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:12:25,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:12:25,954 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 23:12:25,965 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 23:12:25,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:12:25,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:12:25,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:12:25,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:12:25,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:12:25,978 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:12:25,979 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:12:25,979 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:12:25,979 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:12:25,979 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:12:25,979 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:12:25,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:12:25,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:12:25,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:12:25,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:12:25,980 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 23:12:26,104 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:12:26,105 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:12:26,347 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:12:26,472 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:12:26,472 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:12:26,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:12:26 BoogieIcfgContainer [2023-08-03 23:12:26,474 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:12:26,476 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:12:26,476 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:12:26,478 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:12:26,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:12:25" (1/3) ... [2023-08-03 23:12:26,480 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49936102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:12:26, skipping insertion in model container [2023-08-03 23:12:26,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:25" (2/3) ... [2023-08-03 23:12:26,480 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49936102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:12:26, skipping insertion in model container [2023-08-03 23:12:26,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:12:26" (3/3) ... [2023-08-03 23:12:26,481 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix011.opt_bound2.i [2023-08-03 23:12:26,487 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:12:26,493 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:12:26,493 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:12:26,493 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:12:26,538 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:12:26,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 133 transitions, 281 flow [2023-08-03 23:12:26,689 INFO L124 PetriNetUnfolderBase]: 30/459 cut-off events. [2023-08-03 23:12:26,689 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:12:26,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 459 events. 30/459 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2007 event pairs, 0 based on Foata normal form. 0/403 useless extension candidates. Maximal degree in co-relation 272. Up to 16 conditions per place. [2023-08-03 23:12:26,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 133 transitions, 281 flow [2023-08-03 23:12:26,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 104 transitions, 223 flow [2023-08-03 23:12:26,703 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:12:26,712 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 104 transitions, 223 flow [2023-08-03 23:12:26,715 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 104 transitions, 223 flow [2023-08-03 23:12:26,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 104 transitions, 223 flow [2023-08-03 23:12:26,754 INFO L124 PetriNetUnfolderBase]: 6/227 cut-off events. [2023-08-03 23:12:26,754 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:12:26,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 227 events. 6/227 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 668 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 156. Up to 8 conditions per place. [2023-08-03 23:12:26,757 INFO L119 LiptonReduction]: Number of co-enabled transitions 1408 [2023-08-03 23:12:29,362 INFO L134 LiptonReduction]: Checked pairs total: 2968 [2023-08-03 23:12:29,362 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-08-03 23:12:29,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:12:29,375 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;@2a906509, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:12:29,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:12:29,377 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:12:29,377 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-03 23:12:29,378 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:12:29,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:12:29,378 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:12:29,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:12:29,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:12:29,381 INFO L85 PathProgramCache]: Analyzing trace with hash -551896848, now seen corresponding path program 1 times [2023-08-03 23:12:29,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:12:29,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382815710] [2023-08-03 23:12:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:12:29,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:12:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:12:29,456 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:12:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:12:29,483 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:12:29,484 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:12:29,485 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:12:29,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:12:29,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:12:29,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:12:29,486 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 23:12:29,488 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:12:29,488 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:12:29,488 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:12:29,509 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:12:29,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 159 transitions, 354 flow [2023-08-03 23:12:29,615 INFO L124 PetriNetUnfolderBase]: 93/1418 cut-off events. [2023-08-03 23:12:29,615 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:12:29,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1516 conditions, 1418 events. 93/1418 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9822 event pairs, 0 based on Foata normal form. 0/1241 useless extension candidates. Maximal degree in co-relation 1023. Up to 54 conditions per place. [2023-08-03 23:12:29,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 159 transitions, 354 flow [2023-08-03 23:12:29,623 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 130 transitions, 296 flow [2023-08-03 23:12:29,623 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:12:29,623 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 130 transitions, 296 flow [2023-08-03 23:12:29,623 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 130 transitions, 296 flow [2023-08-03 23:12:29,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 130 transitions, 296 flow [2023-08-03 23:12:29,668 INFO L124 PetriNetUnfolderBase]: 12/635 cut-off events. [2023-08-03 23:12:29,668 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:12:29,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 635 events. 12/635 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3311 event pairs, 0 based on Foata normal form. 0/593 useless extension candidates. Maximal degree in co-relation 501. Up to 27 conditions per place. [2023-08-03 23:12:29,677 INFO L119 LiptonReduction]: Number of co-enabled transitions 4000 [2023-08-03 23:12:32,066 INFO L134 LiptonReduction]: Checked pairs total: 13553 [2023-08-03 23:12:32,067 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-08-03 23:12:32,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:12:32,068 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;@2a906509, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:12:32,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:12:32,074 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:12:32,074 INFO L124 PetriNetUnfolderBase]: 0/70 cut-off events. [2023-08-03 23:12:32,074 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-03 23:12:32,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:12:32,075 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:12:32,075 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:12:32,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:12:32,075 INFO L85 PathProgramCache]: Analyzing trace with hash 130513619, now seen corresponding path program 1 times [2023-08-03 23:12:32,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:12:32,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989210431] [2023-08-03 23:12:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:12:32,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:12:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:12:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:12:32,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:12:32,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989210431] [2023-08-03 23:12:32,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989210431] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:12:32,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:12:32,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:12:32,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142823969] [2023-08-03 23:12:32,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:12:32,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:12:32,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:12:32,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:12:32,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:12:32,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 248 [2023-08-03 23:12:32,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 23:12:32,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:12:32,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 248 [2023-08-03 23:12:32,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:12:40,645 INFO L124 PetriNetUnfolderBase]: 78164/107304 cut-off events. [2023-08-03 23:12:40,646 INFO L125 PetriNetUnfolderBase]: For 5202/5202 co-relation queries the response was YES. [2023-08-03 23:12:40,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213815 conditions, 107304 events. 78164/107304 cut-off events. For 5202/5202 co-relation queries the response was YES. Maximal size of possible extension queue 3741. Compared 757301 event pairs, 63366 based on Foata normal form. 0/98765 useless extension candidates. Maximal degree in co-relation 61400. Up to 100362 conditions per place. [2023-08-03 23:12:41,222 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 36 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-03 23:12:41,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 52 transitions, 216 flow [2023-08-03 23:12:41,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:12:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:12:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-08-03 23:12:41,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846774193548387 [2023-08-03 23:12:41,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-08-03 23:12:41,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-08-03 23:12:41,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:12:41,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-08-03 23:12:41,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 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 23:12:41,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:12:41,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:12:41,253 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 132 flow. Second operand 3 states and 435 transitions. [2023-08-03 23:12:41,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 52 transitions, 216 flow [2023-08-03 23:12:41,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 210 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:12:41,263 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 138 flow [2023-08-03 23:12:41,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2023-08-03 23:12:41,267 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2023-08-03 23:12:41,268 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 138 flow [2023-08-03 23:12:41,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 23:12:41,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:12:41,275 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:12:41,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:12:41,276 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:12:41,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:12:41,279 INFO L85 PathProgramCache]: Analyzing trace with hash 513858806, now seen corresponding path program 1 times [2023-08-03 23:12:41,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:12:41,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201330407] [2023-08-03 23:12:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:12:41,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:12:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:12:41,370 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 23:12:41,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:12:41,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201330407] [2023-08-03 23:12:41,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201330407] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:12:41,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933085344] [2023-08-03 23:12:41,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:12:41,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:12:41,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:12:41,375 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 23:12:41,378 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 23:12:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:12:41,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:12:41,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:12:41,498 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 23:12:41,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:12:41,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933085344] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:12:41,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:12:41,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:12:41,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853019970] [2023-08-03 23:12:41,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:12:41,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:12:41,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:12:41,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:12:41,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:12:41,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 248 [2023-08-03 23:12:41,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 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 23:12:41,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:12:41,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 248 [2023-08-03 23:12:41,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:12:49,655 INFO L124 PetriNetUnfolderBase]: 78152/107265 cut-off events. [2023-08-03 23:12:49,655 INFO L125 PetriNetUnfolderBase]: For 4743/4743 co-relation queries the response was YES. [2023-08-03 23:12:49,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213323 conditions, 107265 events. 78152/107265 cut-off events. For 4743/4743 co-relation queries the response was YES. Maximal size of possible extension queue 3741. Compared 756575 event pairs, 52272 based on Foata normal form. 9/98753 useless extension candidates. Maximal degree in co-relation 76027. Up to 100315 conditions per place. [2023-08-03 23:12:50,184 INFO L140 encePairwiseOnDemand]: 244/248 looper letters, 39 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-08-03 23:12:50,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 56 transitions, 238 flow [2023-08-03 23:12:50,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:12:50,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:12:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 699 transitions. [2023-08-03 23:12:50,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637096774193548 [2023-08-03 23:12:50,187 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 699 transitions. [2023-08-03 23:12:50,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 699 transitions. [2023-08-03 23:12:50,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:12:50,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 699 transitions. [2023-08-03 23:12:50,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 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 23:12:50,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 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 23:12:50,191 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 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 23:12:50,191 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 138 flow. Second operand 5 states and 699 transitions. [2023-08-03 23:12:50,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 56 transitions, 238 flow [2023-08-03 23:12:50,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 56 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:12:50,192 INFO L231 Difference]: Finished difference. Result has 67 places, 49 transitions, 152 flow [2023-08-03 23:12:50,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=67, PETRI_TRANSITIONS=49} [2023-08-03 23:12:50,193 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-03 23:12:50,193 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 49 transitions, 152 flow [2023-08-03 23:12:50,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 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 23:12:50,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:12:50,193 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:12:50,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 23:12:50,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:12:50,398 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:12:50,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:12:50,398 INFO L85 PathProgramCache]: Analyzing trace with hash 30209911, now seen corresponding path program 1 times [2023-08-03 23:12:50,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:12:50,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230365325] [2023-08-03 23:12:50,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:12:50,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:12:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:12:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:12:50,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:12:50,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230365325] [2023-08-03 23:12:50,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230365325] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:12:50,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699378664] [2023-08-03 23:12:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:12:50,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:12:50,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:12:50,464 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 23:12:50,466 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 23:12:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:12:50,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:12:50,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:12:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:12:50,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:12:50,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699378664] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:12:50,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:12:50,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:12:50,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427272380] [2023-08-03 23:12:50,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:12:50,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:12:50,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:12:50,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:12:50,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:12:50,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 248 [2023-08-03 23:12:50,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 49 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 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 23:12:50,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:12:50,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 248 [2023-08-03 23:12:50,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:12:58,527 INFO L124 PetriNetUnfolderBase]: 75822/102708 cut-off events. [2023-08-03 23:12:58,528 INFO L125 PetriNetUnfolderBase]: For 4522/4522 co-relation queries the response was YES. [2023-08-03 23:12:58,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205755 conditions, 102708 events. 75822/102708 cut-off events. For 4522/4522 co-relation queries the response was YES. Maximal size of possible extension queue 3780. Compared 710931 event pairs, 70446 based on Foata normal form. 0/95507 useless extension candidates. Maximal degree in co-relation 59168. Up to 96840 conditions per place. [2023-08-03 23:12:59,028 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 42 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-08-03 23:12:59,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 260 flow [2023-08-03 23:12:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:12:59,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:12:59,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-08-03 23:12:59,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913978494623656 [2023-08-03 23:12:59,029 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-08-03 23:12:59,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-08-03 23:12:59,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:12:59,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-08-03 23:12:59,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 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 23:12:59,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:12:59,032 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:12:59,032 INFO L175 Difference]: Start difference. First operand has 67 places, 49 transitions, 152 flow. Second operand 3 states and 440 transitions. [2023-08-03 23:12:59,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 260 flow [2023-08-03 23:12:59,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 58 transitions, 253 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:12:59,034 INFO L231 Difference]: Finished difference. Result has 68 places, 50 transitions, 160 flow [2023-08-03 23:12:59,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=68, PETRI_TRANSITIONS=50} [2023-08-03 23:12:59,034 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 7 predicate places. [2023-08-03 23:12:59,034 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 50 transitions, 160 flow [2023-08-03 23:12:59,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 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 23:12:59,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:12:59,035 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:12:59,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 23:12:59,239 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 23:12:59,241 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:12:59,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:12:59,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1881392920, now seen corresponding path program 1 times [2023-08-03 23:12:59,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:12:59,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328494919] [2023-08-03 23:12:59,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:12:59,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:12:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:12:59,285 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 23:12:59,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:12:59,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328494919] [2023-08-03 23:12:59,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328494919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:12:59,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214583077] [2023-08-03 23:12:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:12:59,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:12:59,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:12:59,287 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 23:12:59,469 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 23:12:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:12:59,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:12:59,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:12:59,559 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 23:12:59,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:12:59,571 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 23:12:59,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214583077] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:12:59,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:12:59,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:12:59,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065891310] [2023-08-03 23:12:59,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:12:59,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:12:59,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:12:59,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:12:59,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:12:59,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 248 [2023-08-03 23:12:59,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 50 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 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 23:12:59,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:12:59,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 248 [2023-08-03 23:12:59,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:13:05,737 INFO L124 PetriNetUnfolderBase]: 59515/79793 cut-off events. [2023-08-03 23:13:05,737 INFO L125 PetriNetUnfolderBase]: For 3744/3744 co-relation queries the response was YES. [2023-08-03 23:13:05,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160143 conditions, 79793 events. 59515/79793 cut-off events. For 3744/3744 co-relation queries the response was YES. Maximal size of possible extension queue 3002. Compared 525492 event pairs, 38349 based on Foata normal form. 3/74620 useless extension candidates. Maximal degree in co-relation 56886. Up to 75373 conditions per place. [2023-08-03 23:13:06,176 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 40 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-03 23:13:06,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 56 transitions, 253 flow [2023-08-03 23:13:06,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:13:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:13:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 567 transitions. [2023-08-03 23:13:06,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5715725806451613 [2023-08-03 23:13:06,178 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 567 transitions. [2023-08-03 23:13:06,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 567 transitions. [2023-08-03 23:13:06,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:13:06,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 567 transitions. [2023-08-03 23:13:06,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 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 23:13:06,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 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 23:13:06,181 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 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 23:13:06,181 INFO L175 Difference]: Start difference. First operand has 68 places, 50 transitions, 160 flow. Second operand 4 states and 567 transitions. [2023-08-03 23:13:06,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 56 transitions, 253 flow [2023-08-03 23:13:06,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 56 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:13:06,183 INFO L231 Difference]: Finished difference. Result has 70 places, 49 transitions, 155 flow [2023-08-03 23:13:06,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=70, PETRI_TRANSITIONS=49} [2023-08-03 23:13:06,184 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 9 predicate places. [2023-08-03 23:13:06,184 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 155 flow [2023-08-03 23:13:06,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 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 23:13:06,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:13:06,185 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:13:06,196 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 23:13:06,389 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 23:13:06,389 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:13:06,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:13:06,389 INFO L85 PathProgramCache]: Analyzing trace with hash 2083550251, now seen corresponding path program 1 times [2023-08-03 23:13:06,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:13:06,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689272700] [2023-08-03 23:13:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:06,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:13:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:06,477 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 23:13:06,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:13:06,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689272700] [2023-08-03 23:13:06,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689272700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:13:06,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469646816] [2023-08-03 23:13:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:06,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:06,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:13:06,481 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 23:13:06,483 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 23:13:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:06,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:13:06,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:13:06,580 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 23:13:06,580 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:13:06,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469646816] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:13:06,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:13:06,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:13:06,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132401877] [2023-08-03 23:13:06,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:13:06,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:13:06,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:13:06,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:13:06,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:13:06,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 248 [2023-08-03 23:13:06,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 49 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 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 23:13:06,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:13:06,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 248 [2023-08-03 23:13:06,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:13:12,558 INFO L124 PetriNetUnfolderBase]: 59107/79471 cut-off events. [2023-08-03 23:13:12,558 INFO L125 PetriNetUnfolderBase]: For 3247/3247 co-relation queries the response was YES. [2023-08-03 23:13:12,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159399 conditions, 79471 events. 59107/79471 cut-off events. For 3247/3247 co-relation queries the response was YES. Maximal size of possible extension queue 3034. Compared 531828 event pairs, 17212 based on Foata normal form. 144/74565 useless extension candidates. Maximal degree in co-relation 56604. Up to 74007 conditions per place. [2023-08-03 23:13:12,919 INFO L140 encePairwiseOnDemand]: 244/248 looper letters, 55 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-08-03 23:13:12,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 317 flow [2023-08-03 23:13:12,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:13:12,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:13:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 714 transitions. [2023-08-03 23:13:12,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5758064516129032 [2023-08-03 23:13:12,922 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 714 transitions. [2023-08-03 23:13:12,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 714 transitions. [2023-08-03 23:13:12,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:13:12,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 714 transitions. [2023-08-03 23:13:12,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 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 23:13:12,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 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 23:13:12,925 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 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 23:13:12,925 INFO L175 Difference]: Start difference. First operand has 70 places, 49 transitions, 155 flow. Second operand 5 states and 714 transitions. [2023-08-03 23:13:12,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 317 flow [2023-08-03 23:13:12,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 310 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:13:12,928 INFO L231 Difference]: Finished difference. Result has 71 places, 49 transitions, 165 flow [2023-08-03 23:13:12,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=165, PETRI_PLACES=71, PETRI_TRANSITIONS=49} [2023-08-03 23:13:12,933 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-08-03 23:13:12,933 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 49 transitions, 165 flow [2023-08-03 23:13:12,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 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 23:13:12,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:13:12,934 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:13:12,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 23:13:13,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:13,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:13:13,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:13:13,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1738138696, now seen corresponding path program 1 times [2023-08-03 23:13:13,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:13:13,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885528320] [2023-08-03 23:13:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:13,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:13:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:13:13,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:13:13,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885528320] [2023-08-03 23:13:13,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885528320] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:13:13,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845286693] [2023-08-03 23:13:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:13,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:13,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:13:13,220 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 23:13:13,221 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 23:13:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:13,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:13:13,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:13:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:13:13,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:13:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:13:13,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845286693] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:13:13,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:13:13,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:13:13,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201395273] [2023-08-03 23:13:13,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:13:13,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:13:13,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:13:13,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:13:13,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:13:13,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 248 [2023-08-03 23:13:13,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 49 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 134.4) internal successors, (672), 5 states have internal predecessors, (672), 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 23:13:13,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:13:13,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 248 [2023-08-03 23:13:13,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:13:18,347 INFO L124 PetriNetUnfolderBase]: 49312/65743 cut-off events. [2023-08-03 23:13:18,348 INFO L125 PetriNetUnfolderBase]: For 3493/3493 co-relation queries the response was YES. [2023-08-03 23:13:18,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132390 conditions, 65743 events. 49312/65743 cut-off events. For 3493/3493 co-relation queries the response was YES. Maximal size of possible extension queue 2758. Compared 425694 event pairs, 30214 based on Foata normal form. 36/61746 useless extension candidates. Maximal degree in co-relation 46922. Up to 61204 conditions per place. [2023-08-03 23:13:18,664 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 51 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2023-08-03 23:13:18,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 66 transitions, 303 flow [2023-08-03 23:13:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:13:18,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:13:18,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 578 transitions. [2023-08-03 23:13:18,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826612903225806 [2023-08-03 23:13:18,666 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 578 transitions. [2023-08-03 23:13:18,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 578 transitions. [2023-08-03 23:13:18,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:13:18,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 578 transitions. [2023-08-03 23:13:18,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 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 23:13:18,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 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 23:13:18,668 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 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 23:13:18,668 INFO L175 Difference]: Start difference. First operand has 71 places, 49 transitions, 165 flow. Second operand 4 states and 578 transitions. [2023-08-03 23:13:18,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 66 transitions, 303 flow [2023-08-03 23:13:18,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 66 transitions, 298 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:13:18,670 INFO L231 Difference]: Finished difference. Result has 72 places, 48 transitions, 158 flow [2023-08-03 23:13:18,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=72, PETRI_TRANSITIONS=48} [2023-08-03 23:13:18,671 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 11 predicate places. [2023-08-03 23:13:18,671 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 48 transitions, 158 flow [2023-08-03 23:13:18,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.4) internal successors, (672), 5 states have internal predecessors, (672), 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 23:13:18,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:13:18,671 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:13:18,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 23:13:18,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:18,873 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:13:18,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:13:18,873 INFO L85 PathProgramCache]: Analyzing trace with hash 2101624023, now seen corresponding path program 1 times [2023-08-03 23:13:18,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:13:18,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668748210] [2023-08-03 23:13:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:18,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:13:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:13:18,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:13:18,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668748210] [2023-08-03 23:13:18,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668748210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:13:18,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:13:18,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 23:13:18,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129236012] [2023-08-03 23:13:18,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:13:18,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:13:18,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:13:18,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:13:18,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 23:13:18,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 248 [2023-08-03 23:13:18,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 48 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 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 23:13:18,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:13:18,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 248 [2023-08-03 23:13:18,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:13:21,533 INFO L124 PetriNetUnfolderBase]: 25984/35710 cut-off events. [2023-08-03 23:13:21,534 INFO L125 PetriNetUnfolderBase]: For 2458/2458 co-relation queries the response was YES. [2023-08-03 23:13:21,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73161 conditions, 35710 events. 25984/35710 cut-off events. For 2458/2458 co-relation queries the response was YES. Maximal size of possible extension queue 1586. Compared 224841 event pairs, 952 based on Foata normal form. 5184/38553 useless extension candidates. Maximal degree in co-relation 26027. Up to 28224 conditions per place. [2023-08-03 23:13:21,619 INFO L140 encePairwiseOnDemand]: 246/248 looper letters, 0 selfloop transitions, 0 changer transitions 72/72 dead transitions. [2023-08-03 23:13:21,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 72 transitions, 326 flow [2023-08-03 23:13:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:13:21,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:13:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 588 transitions. [2023-08-03 23:13:21,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592741935483871 [2023-08-03 23:13:21,621 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 588 transitions. [2023-08-03 23:13:21,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 588 transitions. [2023-08-03 23:13:21,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:13:21,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 588 transitions. [2023-08-03 23:13:21,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 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 23:13:21,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 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 23:13:21,624 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 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 23:13:21,624 INFO L175 Difference]: Start difference. First operand has 72 places, 48 transitions, 158 flow. Second operand 4 states and 588 transitions. [2023-08-03 23:13:21,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 72 transitions, 326 flow [2023-08-03 23:13:21,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 72 transitions, 319 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:13:21,773 INFO L231 Difference]: Finished difference. Result has 70 places, 0 transitions, 0 flow [2023-08-03 23:13:21,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=70, PETRI_TRANSITIONS=0} [2023-08-03 23:13:21,773 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 9 predicate places. [2023-08-03 23:13:21,773 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 0 transitions, 0 flow [2023-08-03 23:13:21,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 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 23:13:21,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:13:21,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:13:21,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:13:21,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 23:13:21,774 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:13:21,774 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:13:21,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 159 transitions, 354 flow [2023-08-03 23:13:21,851 INFO L124 PetriNetUnfolderBase]: 93/1418 cut-off events. [2023-08-03 23:13:21,851 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:13:21,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1516 conditions, 1418 events. 93/1418 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9822 event pairs, 0 based on Foata normal form. 0/1241 useless extension candidates. Maximal degree in co-relation 1023. Up to 54 conditions per place. [2023-08-03 23:13:21,854 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 159 transitions, 354 flow [2023-08-03 23:13:21,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 157 transitions, 342 flow [2023-08-03 23:13:21,856 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:13:21,856 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 157 transitions, 342 flow [2023-08-03 23:13:21,856 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 157 transitions, 342 flow [2023-08-03 23:13:21,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 157 transitions, 342 flow [2023-08-03 23:13:21,929 INFO L124 PetriNetUnfolderBase]: 93/1414 cut-off events. [2023-08-03 23:13:21,929 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-03 23:13:21,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1504 conditions, 1414 events. 93/1414 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9774 event pairs, 0 based on Foata normal form. 0/1237 useless extension candidates. Maximal degree in co-relation 1011. Up to 54 conditions per place. [2023-08-03 23:13:21,945 INFO L119 LiptonReduction]: Number of co-enabled transitions 6588 [2023-08-03 23:13:24,692 INFO L134 LiptonReduction]: Checked pairs total: 20159 [2023-08-03 23:13:24,692 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-03 23:13:24,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:13:24,694 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;@2a906509, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:13:24,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:13:24,696 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:13:24,696 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-03 23:13:24,696 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:13:24,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:13:24,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:13:24,696 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:13:24,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:13:24,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1778237910, now seen corresponding path program 1 times [2023-08-03 23:13:24,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:13:24,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343874458] [2023-08-03 23:13:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:24,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:13:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:24,736 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 23:13:24,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:13:24,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343874458] [2023-08-03 23:13:24,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343874458] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:13:24,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:13:24,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:13:24,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460944204] [2023-08-03 23:13:24,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:13:24,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:13:24,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:13:24,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:13:24,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:13:24,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 279 [2023-08-03 23:13:24,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 54 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 23:13:24,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:13:24,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 279 [2023-08-03 23:13:24,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:14:01,013 INFO L124 PetriNetUnfolderBase]: 378842/497271 cut-off events. [2023-08-03 23:14:01,014 INFO L125 PetriNetUnfolderBase]: For 5181/5181 co-relation queries the response was YES. [2023-08-03 23:14:01,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980234 conditions, 497271 events. 378842/497271 cut-off events. For 5181/5181 co-relation queries the response was YES. Maximal size of possible extension queue 14583. Compared 3587442 event pairs, 313476 based on Foata normal form. 10836/436658 useless extension candidates. Maximal degree in co-relation 283161. Up to 476892 conditions per place. [2023-08-03 23:14:03,554 INFO L140 encePairwiseOnDemand]: 275/279 looper letters, 43 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-03 23:14:03,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 57 transitions, 232 flow [2023-08-03 23:14:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:14:03,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:14:03,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-03 23:14:03,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292712066905615 [2023-08-03 23:14:03,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-03 23:14:03,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-03 23:14:03,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:14:03,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-03 23:14:03,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 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 23:14:03,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 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 23:14:03,558 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 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 23:14:03,558 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 136 flow. Second operand 3 states and 443 transitions. [2023-08-03 23:14:03,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 57 transitions, 232 flow [2023-08-03 23:14:03,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 230 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 23:14:03,562 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 144 flow [2023-08-03 23:14:03,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2023-08-03 23:14:03,563 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-08-03 23:14:03,563 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 144 flow [2023-08-03 23:14:03,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 23:14:03,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:14:03,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:14:03,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 23:14:03,563 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:14:03,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:14:03,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2053262056, now seen corresponding path program 1 times [2023-08-03 23:14:03,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:14:03,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176218518] [2023-08-03 23:14:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:14:03,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:14:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:14:03,591 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 23:14:03,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:14:03,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176218518] [2023-08-03 23:14:03,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176218518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:14:03,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931339398] [2023-08-03 23:14:03,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:14:03,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:14:03,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:14:03,592 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:14:03,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 23:14:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:14:03,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:14:03,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:14:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:14:03,674 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:14:03,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931339398] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:14:03,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:14:03,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:14:03,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135550768] [2023-08-03 23:14:03,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:14:03,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:14:03,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:14:03,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:14:03,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:14:03,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 279 [2023-08-03 23:14:03,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 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 23:14:03,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:14:03,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 279 [2023-08-03 23:14:03,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand