/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_safe011_power.opt_pso.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:22:38,939 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:22:39,000 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:22:39,004 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:22:39,005 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:22:39,005 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:22:39,005 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:22:39,032 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:22:39,032 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:22:39,035 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:22:39,035 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:22:39,036 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:22:39,036 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:22:39,037 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:22:39,037 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:22:39,038 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:22:39,038 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:22:39,038 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:22:39,038 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:22:39,038 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:22:39,038 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:22:39,039 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:22:39,039 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:22:39,039 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:22:39,039 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:22:39,039 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:22:39,039 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:22:39,040 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:22:39,040 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:22:39,040 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:22:39,041 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:22:39,041 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:22:39,041 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:22:39,041 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:22:39,041 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:22:39,042 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:22:39,042 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:22:39,042 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:22:39,042 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:22:39,042 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:22:39,042 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:22:39,042 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:22:39,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:22:39,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:22:39,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:22:39,243 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:22:39,244 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:22:39,244 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe011_power.opt_pso.opt_bound2.i [2023-08-04 00:22:40,298 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:22:40,460 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:22:40,460 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe011_power.opt_pso.opt_bound2.i [2023-08-04 00:22:40,470 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/444769c57/5d48eb4ff6244680ba66c9b4642224e3/FLAG4c7d92f53 [2023-08-04 00:22:40,481 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/444769c57/5d48eb4ff6244680ba66c9b4642224e3 [2023-08-04 00:22:40,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:22:40,483 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:22:40,484 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:22:40,484 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:22:40,486 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:22:40,486 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:22:40" (1/1) ... [2023-08-04 00:22:40,487 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bd68284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:40, skipping insertion in model container [2023-08-04 00:22:40,487 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:22:40" (1/1) ... [2023-08-04 00:22:40,524 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:22:40,628 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_safe011_power.opt_pso.opt_bound2.i[959,972] [2023-08-04 00:22:40,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:22:40,757 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:22:40,766 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_safe011_power.opt_pso.opt_bound2.i[959,972] [2023-08-04 00:22:40,781 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:22:40,782 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:22:40,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:22:40,830 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:22:40,830 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:22:40,834 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:22:40,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:40 WrapperNode [2023-08-04 00:22:40,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:22:40,835 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:22:40,835 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:22:40,835 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:22:40,839 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:40" (1/1) ... [2023-08-04 00:22:40,865 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:40" (1/1) ... [2023-08-04 00:22:40,884 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 168 [2023-08-04 00:22:40,885 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:22:40,885 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:22:40,885 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:22:40,885 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:22:40,908 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:40" (1/1) ... [2023-08-04 00:22:40,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:40" (1/1) ... [2023-08-04 00:22:40,911 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:40" (1/1) ... [2023-08-04 00:22:40,911 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:40" (1/1) ... [2023-08-04 00:22:40,916 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:40" (1/1) ... [2023-08-04 00:22:40,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:40" (1/1) ... [2023-08-04 00:22:40,932 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:40" (1/1) ... [2023-08-04 00:22:40,933 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:40" (1/1) ... [2023-08-04 00:22:40,935 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:22:40,936 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:22:40,936 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:22:40,936 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:22:40,937 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:40" (1/1) ... [2023-08-04 00:22:40,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:22:40,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:22:40,996 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) [2023-08-04 00:22:41,011 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 [2023-08-04 00:22:41,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:22:41,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:22:41,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:22:41,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:22:41,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:22:41,024 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:22:41,024 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:22:41,024 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:22:41,024 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:22:41,025 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:22:41,025 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:22:41,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:22:41,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:22:41,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:22:41,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:22:41,026 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:22:41,128 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:22:41,129 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:22:41,325 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:22:41,462 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:22:41,462 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:22:41,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:22:41 BoogieIcfgContainer [2023-08-04 00:22:41,466 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:22:41,468 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:22:41,468 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:22:41,470 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:22:41,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:22:40" (1/3) ... [2023-08-04 00:22:41,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3193ea41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:22:41, skipping insertion in model container [2023-08-04 00:22:41,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:40" (2/3) ... [2023-08-04 00:22:41,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3193ea41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:22:41, skipping insertion in model container [2023-08-04 00:22:41,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:22:41" (3/3) ... [2023-08-04 00:22:41,474 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe011_power.opt_pso.opt_bound2.i [2023-08-04 00:22:41,480 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:22:41,486 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:22:41,486 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 00:22:41,486 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:22:41,534 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:22:41,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 128 transitions, 271 flow [2023-08-04 00:22:41,686 INFO L124 PetriNetUnfolderBase]: 30/448 cut-off events. [2023-08-04 00:22:41,687 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:22:41,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 448 events. 30/448 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1969 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 269. Up to 16 conditions per place. [2023-08-04 00:22:41,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 128 transitions, 271 flow [2023-08-04 00:22:41,694 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 99 transitions, 213 flow [2023-08-04 00:22:41,697 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:22:41,706 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 99 transitions, 213 flow [2023-08-04 00:22:41,709 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 99 transitions, 213 flow [2023-08-04 00:22:41,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 99 transitions, 213 flow [2023-08-04 00:22:41,735 INFO L124 PetriNetUnfolderBase]: 6/216 cut-off events. [2023-08-04 00:22:41,735 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:22:41,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 216 events. 6/216 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 631 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 153. Up to 8 conditions per place. [2023-08-04 00:22:41,738 INFO L119 LiptonReduction]: Number of co-enabled transitions 1422 [2023-08-04 00:22:44,033 INFO L134 LiptonReduction]: Checked pairs total: 3669 [2023-08-04 00:22:44,033 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-08-04 00:22:44,041 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:22:44,045 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;@739fc68, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:22:44,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:22:44,048 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:22:44,048 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-04 00:22:44,048 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:22:44,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:44,049 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:22:44,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:22:44,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:44,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1551084009, now seen corresponding path program 1 times [2023-08-04 00:22:44,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:44,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855362860] [2023-08-04 00:22:44,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:44,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:22:44,162 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:22:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:22:44,205 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:22:44,206 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:22:44,207 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:22:44,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:22:44,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:22:44,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:22:44,209 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 00:22:44,214 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:22:44,215 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:22:44,215 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:22:44,242 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:22:44,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 153 transitions, 342 flow [2023-08-04 00:22:44,385 INFO L124 PetriNetUnfolderBase]: 93/1380 cut-off events. [2023-08-04 00:22:44,385 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:22:44,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 1380 events. 93/1380 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9505 event pairs, 0 based on Foata normal form. 0/1215 useless extension candidates. Maximal degree in co-relation 1003. Up to 54 conditions per place. [2023-08-04 00:22:44,391 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 153 transitions, 342 flow [2023-08-04 00:22:44,393 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 124 transitions, 284 flow [2023-08-04 00:22:44,393 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:22:44,394 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 124 transitions, 284 flow [2023-08-04 00:22:44,394 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 124 transitions, 284 flow [2023-08-04 00:22:44,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 124 transitions, 284 flow [2023-08-04 00:22:44,440 INFO L124 PetriNetUnfolderBase]: 12/597 cut-off events. [2023-08-04 00:22:44,441 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:22:44,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695 conditions, 597 events. 12/597 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3048 event pairs, 0 based on Foata normal form. 0/567 useless extension candidates. Maximal degree in co-relation 481. Up to 27 conditions per place. [2023-08-04 00:22:44,450 INFO L119 LiptonReduction]: Number of co-enabled transitions 3944 [2023-08-04 00:22:46,528 INFO L134 LiptonReduction]: Checked pairs total: 12712 [2023-08-04 00:22:46,528 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-04 00:22:46,531 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:22:46,535 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;@739fc68, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:22:46,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:22:46,540 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:22:46,540 INFO L124 PetriNetUnfolderBase]: 0/61 cut-off events. [2023-08-04 00:22:46,540 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 00:22:46,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:46,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:22:46,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:22:46,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:46,540 INFO L85 PathProgramCache]: Analyzing trace with hash 409964282, now seen corresponding path program 1 times [2023-08-04 00:22:46,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:46,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799556987] [2023-08-04 00:22:46,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:46,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:22:46,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:22:46,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799556987] [2023-08-04 00:22:46,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799556987] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:22:46,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:22:46,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:22:46,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137879654] [2023-08-04 00:22:46,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:22:46,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:22:46,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:22:46,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:22:46,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:22:46,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 238 [2023-08-04 00:22:46,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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) [2023-08-04 00:22:46,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:22:46,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 238 [2023-08-04 00:22:46,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:22:57,026 INFO L124 PetriNetUnfolderBase]: 99287/133235 cut-off events. [2023-08-04 00:22:57,026 INFO L125 PetriNetUnfolderBase]: For 8636/8636 co-relation queries the response was YES. [2023-08-04 00:22:57,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270014 conditions, 133235 events. 99287/133235 cut-off events. For 8636/8636 co-relation queries the response was YES. Maximal size of possible extension queue 3913. Compared 894233 event pairs, 78800 based on Foata normal form. 0/121134 useless extension candidates. Maximal degree in co-relation 62718. Up to 126604 conditions per place. [2023-08-04 00:22:57,737 INFO L140 encePairwiseOnDemand]: 235/238 looper letters, 37 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-04 00:22:57,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 216 flow [2023-08-04 00:22:57,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:22:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:22:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-08-04 00:22:57,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5812324929971989 [2023-08-04 00:22:57,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-08-04 00:22:57,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-08-04 00:22:57,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:22:57,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-08-04 00:22:57,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 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) [2023-08-04 00:22:57,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 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) [2023-08-04 00:22:57,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 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) [2023-08-04 00:22:57,758 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 128 flow. Second operand 3 states and 415 transitions. [2023-08-04 00:22:57,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 216 flow [2023-08-04 00:22:57,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 51 transitions, 210 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:22:57,772 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 134 flow [2023-08-04 00:22:57,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2023-08-04 00:22:57,775 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-04 00:22:57,775 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 134 flow [2023-08-04 00:22:57,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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) [2023-08-04 00:22:57,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:57,776 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:22:57,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:22:57,776 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:22:57,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:57,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1186098182, now seen corresponding path program 1 times [2023-08-04 00:22:57,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:57,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844910637] [2023-08-04 00:22:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:57,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:22:57,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:22:57,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844910637] [2023-08-04 00:22:57,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844910637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:22:57,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732265845] [2023-08-04 00:22:57,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:57,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:22:57,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:22:57,877 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) [2023-08-04 00:22:57,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:22:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:57,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:22:57,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:22:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:22:58,029 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:22:58,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732265845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:22:58,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:22:58,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:22:58,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635834563] [2023-08-04 00:22:58,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:22:58,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:22:58,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:22:58,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:22:58,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:22:58,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 238 [2023-08-04 00:22:58,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 125.6) internal successors, (628), 5 states have internal predecessors, (628), 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) [2023-08-04 00:22:58,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:22:58,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 238 [2023-08-04 00:22:58,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:23:08,012 INFO L124 PetriNetUnfolderBase]: 99263/133359 cut-off events. [2023-08-04 00:23:08,012 INFO L125 PetriNetUnfolderBase]: For 7984/7984 co-relation queries the response was YES. [2023-08-04 00:23:08,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269637 conditions, 133359 events. 99263/133359 cut-off events. For 7984/7984 co-relation queries the response was YES. Maximal size of possible extension queue 3918. Compared 895282 event pairs, 62420 based on Foata normal form. 16/121314 useless extension candidates. Maximal degree in co-relation 70812. Up to 126521 conditions per place. [2023-08-04 00:23:08,836 INFO L140 encePairwiseOnDemand]: 234/238 looper letters, 42 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-08-04 00:23:08,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 246 flow [2023-08-04 00:23:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:23:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:23:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 667 transitions. [2023-08-04 00:23:08,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5605042016806723 [2023-08-04 00:23:08,839 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 667 transitions. [2023-08-04 00:23:08,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 667 transitions. [2023-08-04 00:23:08,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:23:08,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 667 transitions. [2023-08-04 00:23:08,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 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) [2023-08-04 00:23:08,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:23:08,844 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:23:08,844 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 134 flow. Second operand 5 states and 667 transitions. [2023-08-04 00:23:08,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 246 flow [2023-08-04 00:23:08,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 243 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:23:08,850 INFO L231 Difference]: Finished difference. Result has 65 places, 47 transitions, 148 flow [2023-08-04 00:23:08,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=47} [2023-08-04 00:23:08,851 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-08-04 00:23:08,851 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 47 transitions, 148 flow [2023-08-04 00:23:08,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.6) internal successors, (628), 5 states have internal predecessors, (628), 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) [2023-08-04 00:23:08,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:23:08,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:23:08,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 00:23:09,055 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 [2023-08-04 00:23:09,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:23:09,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:23:09,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1015459904, now seen corresponding path program 1 times [2023-08-04 00:23:09,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:23:09,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832374189] [2023-08-04 00:23:09,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:23:09,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:23:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:23:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:23:09,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:23:09,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832374189] [2023-08-04 00:23:09,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832374189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:23:09,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900540738] [2023-08-04 00:23:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:23:09,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:23:09,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:23:09,149 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) [2023-08-04 00:23:09,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:23:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:23:09,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:23:09,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:23:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:23:09,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:23:09,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900540738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:23:09,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:23:09,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:23:09,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558292975] [2023-08-04 00:23:09,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:23:09,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:23:09,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:23:09,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:23:09,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:23:09,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 238 [2023-08-04 00:23:09,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 47 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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) [2023-08-04 00:23:09,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:23:09,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 238 [2023-08-04 00:23:09,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:23:19,406 INFO L124 PetriNetUnfolderBase]: 97376/132517 cut-off events. [2023-08-04 00:23:19,407 INFO L125 PetriNetUnfolderBase]: For 7483/7483 co-relation queries the response was YES. [2023-08-04 00:23:19,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266851 conditions, 132517 events. 97376/132517 cut-off events. For 7483/7483 co-relation queries the response was YES. Maximal size of possible extension queue 4096. Compared 917695 event pairs, 76147 based on Foata normal form. 0/120596 useless extension candidates. Maximal degree in co-relation 104597. Up to 123534 conditions per place. [2023-08-04 00:23:20,084 INFO L140 encePairwiseOnDemand]: 235/238 looper letters, 45 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-04 00:23:20,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 59 transitions, 268 flow [2023-08-04 00:23:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:23:20,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:23:20,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2023-08-04 00:23:20,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5910364145658263 [2023-08-04 00:23:20,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2023-08-04 00:23:20,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2023-08-04 00:23:20,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:23:20,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2023-08-04 00:23:20,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:23:20,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 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) [2023-08-04 00:23:20,088 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 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) [2023-08-04 00:23:20,088 INFO L175 Difference]: Start difference. First operand has 65 places, 47 transitions, 148 flow. Second operand 3 states and 422 transitions. [2023-08-04 00:23:20,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 59 transitions, 268 flow [2023-08-04 00:23:20,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 59 transitions, 261 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:23:20,090 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 156 flow [2023-08-04 00:23:20,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2023-08-04 00:23:20,091 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2023-08-04 00:23:20,091 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 156 flow [2023-08-04 00:23:20,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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) [2023-08-04 00:23:20,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:23:20,091 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:23:20,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 00:23:20,295 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 [2023-08-04 00:23:20,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:23:20,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:23:20,296 INFO L85 PathProgramCache]: Analyzing trace with hash -491787548, now seen corresponding path program 1 times [2023-08-04 00:23:20,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:23:20,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154995551] [2023-08-04 00:23:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:23:20,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:23:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:23:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:23:20,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:23:20,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154995551] [2023-08-04 00:23:20,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154995551] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:23:20,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330485904] [2023-08-04 00:23:20,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:23:20,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:23:20,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:23:20,341 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) [2023-08-04 00:23:20,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 00:23:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:23:20,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:23:20,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:23:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:23:20,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:23:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:23:20,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330485904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:23:20,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:23:20,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:23:20,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947143213] [2023-08-04 00:23:20,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:23:20,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:23:20,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:23:20,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:23:20,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:23:20,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 238 [2023-08-04 00:23:20,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 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) [2023-08-04 00:23:20,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:23:20,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 238 [2023-08-04 00:23:20,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:23:28,745 INFO L124 PetriNetUnfolderBase]: 81082/109202 cut-off events. [2023-08-04 00:23:28,745 INFO L125 PetriNetUnfolderBase]: For 7000/7000 co-relation queries the response was YES. [2023-08-04 00:23:28,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220898 conditions, 109202 events. 81082/109202 cut-off events. For 7000/7000 co-relation queries the response was YES. Maximal size of possible extension queue 3655. Compared 725973 event pairs, 49312 based on Foata normal form. 4/100149 useless extension candidates. Maximal degree in co-relation 57851. Up to 102233 conditions per place. [2023-08-04 00:23:29,292 INFO L140 encePairwiseOnDemand]: 235/238 looper letters, 43 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-04 00:23:29,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 57 transitions, 261 flow [2023-08-04 00:23:29,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:23:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:23:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 542 transitions. [2023-08-04 00:23:29,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569327731092437 [2023-08-04 00:23:29,295 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 542 transitions. [2023-08-04 00:23:29,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 542 transitions. [2023-08-04 00:23:29,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:23:29,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 542 transitions. [2023-08-04 00:23:29,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 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) [2023-08-04 00:23:29,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 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) [2023-08-04 00:23:29,298 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 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) [2023-08-04 00:23:29,298 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 156 flow. Second operand 4 states and 542 transitions. [2023-08-04 00:23:29,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 57 transitions, 261 flow [2023-08-04 00:23:29,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 259 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:23:29,300 INFO L231 Difference]: Finished difference. Result has 68 places, 47 transitions, 151 flow [2023-08-04 00:23:29,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=68, PETRI_TRANSITIONS=47} [2023-08-04 00:23:29,301 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-04 00:23:29,301 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 47 transitions, 151 flow [2023-08-04 00:23:29,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 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) [2023-08-04 00:23:29,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:23:29,301 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:23:29,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 00:23:29,505 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 [2023-08-04 00:23:29,506 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:23:29,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:23:29,506 INFO L85 PathProgramCache]: Analyzing trace with hash -614905655, now seen corresponding path program 1 times [2023-08-04 00:23:29,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:23:29,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859274986] [2023-08-04 00:23:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:23:29,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:23:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:23:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:23:29,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:23:29,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859274986] [2023-08-04 00:23:29,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859274986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:23:29,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510951719] [2023-08-04 00:23:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:23:29,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:23:29,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:23:29,585 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) [2023-08-04 00:23:29,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 00:23:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:23:29,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:23:29,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:23:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:23:29,679 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:23:29,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510951719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:23:29,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:23:29,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:23:29,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999186509] [2023-08-04 00:23:29,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:23:29,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:23:29,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:23:29,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:23:29,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:23:29,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 238 [2023-08-04 00:23:29,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 47 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 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) [2023-08-04 00:23:29,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:23:29,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 238 [2023-08-04 00:23:29,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:23:37,683 INFO L124 PetriNetUnfolderBase]: 79842/108047 cut-off events. [2023-08-04 00:23:37,683 INFO L125 PetriNetUnfolderBase]: For 5567/5567 co-relation queries the response was YES. [2023-08-04 00:23:37,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218220 conditions, 108047 events. 79842/108047 cut-off events. For 5567/5567 co-relation queries the response was YES. Maximal size of possible extension queue 3696. Compared 727494 event pairs, 18762 based on Foata normal form. 400/99870 useless extension candidates. Maximal degree in co-relation 103865. Up to 98424 conditions per place. [2023-08-04 00:23:38,223 INFO L140 encePairwiseOnDemand]: 234/238 looper letters, 64 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-08-04 00:23:38,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 349 flow [2023-08-04 00:23:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:23:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:23:38,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 688 transitions. [2023-08-04 00:23:38,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5781512605042017 [2023-08-04 00:23:38,243 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 688 transitions. [2023-08-04 00:23:38,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 688 transitions. [2023-08-04 00:23:38,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:23:38,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 688 transitions. [2023-08-04 00:23:38,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 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) [2023-08-04 00:23:38,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:23:38,247 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:23:38,247 INFO L175 Difference]: Start difference. First operand has 68 places, 47 transitions, 151 flow. Second operand 5 states and 688 transitions. [2023-08-04 00:23:38,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 349 flow [2023-08-04 00:23:38,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 342 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:23:38,252 INFO L231 Difference]: Finished difference. Result has 69 places, 47 transitions, 161 flow [2023-08-04 00:23:38,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=69, PETRI_TRANSITIONS=47} [2023-08-04 00:23:38,252 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-08-04 00:23:38,252 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 47 transitions, 161 flow [2023-08-04 00:23:38,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 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) [2023-08-04 00:23:38,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:23:38,253 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:23:38,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 00:23:38,453 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 [2023-08-04 00:23:38,453 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:23:38,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:23:38,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1202842834, now seen corresponding path program 1 times [2023-08-04 00:23:38,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:23:38,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23943323] [2023-08-04 00:23:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:23:38,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:23:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:23:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:23:38,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:23:38,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23943323] [2023-08-04 00:23:38,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23943323] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:23:38,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183045532] [2023-08-04 00:23:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:23:38,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:23:38,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:23:38,530 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) [2023-08-04 00:23:38,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 00:23:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:23:38,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:23:38,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:23:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:23:38,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:23:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:23:38,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183045532] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:23:38,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:23:38,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:23:38,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539998647] [2023-08-04 00:23:38,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:23:38,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:23:38,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:23:38,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:23:38,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:23:38,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 238 [2023-08-04 00:23:38,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 47 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 127.4) internal successors, (637), 5 states have internal predecessors, (637), 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) [2023-08-04 00:23:38,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:23:38,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 238 [2023-08-04 00:23:38,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:23:45,732 INFO L124 PetriNetUnfolderBase]: 69178/92903 cut-off events. [2023-08-04 00:23:45,732 INFO L125 PetriNetUnfolderBase]: For 7385/7385 co-relation queries the response was YES. [2023-08-04 00:23:45,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189064 conditions, 92903 events. 69178/92903 cut-off events. For 7385/7385 co-relation queries the response was YES. Maximal size of possible extension queue 3407. Compared 606281 event pairs, 40842 based on Foata normal form. 80/85222 useless extension candidates. Maximal degree in co-relation 90109. Up to 84569 conditions per place. [2023-08-04 00:23:46,191 INFO L140 encePairwiseOnDemand]: 235/238 looper letters, 58 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2023-08-04 00:23:46,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 327 flow [2023-08-04 00:23:46,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:23:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:23:46,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 557 transitions. [2023-08-04 00:23:46,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850840336134454 [2023-08-04 00:23:46,209 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 557 transitions. [2023-08-04 00:23:46,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 557 transitions. [2023-08-04 00:23:46,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:23:46,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 557 transitions. [2023-08-04 00:23:46,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 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) [2023-08-04 00:23:46,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 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) [2023-08-04 00:23:46,211 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 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) [2023-08-04 00:23:46,212 INFO L175 Difference]: Start difference. First operand has 69 places, 47 transitions, 161 flow. Second operand 4 states and 557 transitions. [2023-08-04 00:23:46,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 327 flow [2023-08-04 00:23:46,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 322 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:23:46,229 INFO L231 Difference]: Finished difference. Result has 70 places, 46 transitions, 154 flow [2023-08-04 00:23:46,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=70, PETRI_TRANSITIONS=46} [2023-08-04 00:23:46,231 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 11 predicate places. [2023-08-04 00:23:46,231 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 46 transitions, 154 flow [2023-08-04 00:23:46,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.4) internal successors, (637), 5 states have internal predecessors, (637), 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) [2023-08-04 00:23:46,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:23:46,231 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:23:46,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 00:23:46,431 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 [2023-08-04 00:23:46,432 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:23:46,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:23:46,432 INFO L85 PathProgramCache]: Analyzing trace with hash 103983544, now seen corresponding path program 1 times [2023-08-04 00:23:46,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:23:46,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605929819] [2023-08-04 00:23:46,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:23:46,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:23:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:23:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:23:46,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:23:46,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605929819] [2023-08-04 00:23:46,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605929819] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:23:46,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:23:46,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 00:23:46,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360516288] [2023-08-04 00:23:46,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:23:46,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:23:46,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:23:46,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:23:46,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:23:46,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 238 [2023-08-04 00:23:46,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 46 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 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) [2023-08-04 00:23:46,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:23:46,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 238 [2023-08-04 00:23:46,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:23:50,338 INFO L124 PetriNetUnfolderBase]: 39738/55159 cut-off events. [2023-08-04 00:23:50,338 INFO L125 PetriNetUnfolderBase]: For 5829/5829 co-relation queries the response was YES. [2023-08-04 00:23:50,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114360 conditions, 55159 events. 39738/55159 cut-off events. For 5829/5829 co-relation queries the response was YES. Maximal size of possible extension queue 2043. Compared 358840 event pairs, 2738 based on Foata normal form. 6400/57158 useless extension candidates. Maximal degree in co-relation 54357. Up to 38800 conditions per place. [2023-08-04 00:23:50,463 INFO L140 encePairwiseOnDemand]: 236/238 looper letters, 0 selfloop transitions, 0 changer transitions 76/76 dead transitions. [2023-08-04 00:23:50,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 346 flow [2023-08-04 00:23:50,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:23:50,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:23:50,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 566 transitions. [2023-08-04 00:23:50,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945378151260504 [2023-08-04 00:23:50,465 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 566 transitions. [2023-08-04 00:23:50,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 566 transitions. [2023-08-04 00:23:50,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:23:50,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 566 transitions. [2023-08-04 00:23:50,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 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) [2023-08-04 00:23:50,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 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) [2023-08-04 00:23:50,468 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 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) [2023-08-04 00:23:50,468 INFO L175 Difference]: Start difference. First operand has 70 places, 46 transitions, 154 flow. Second operand 4 states and 566 transitions. [2023-08-04 00:23:50,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 346 flow [2023-08-04 00:23:51,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 339 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:23:51,073 INFO L231 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2023-08-04 00:23:51,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=68, PETRI_TRANSITIONS=0} [2023-08-04 00:23:51,074 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-04 00:23:51,074 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2023-08-04 00:23:51,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 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) [2023-08-04 00:23:51,074 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:23:51,074 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:23:51,075 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:23:51,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 00:23:51,075 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:23:51,075 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:23:51,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 153 transitions, 342 flow [2023-08-04 00:23:51,155 INFO L124 PetriNetUnfolderBase]: 93/1380 cut-off events. [2023-08-04 00:23:51,155 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:23:51,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 1380 events. 93/1380 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9505 event pairs, 0 based on Foata normal form. 0/1215 useless extension candidates. Maximal degree in co-relation 1003. Up to 54 conditions per place. [2023-08-04 00:23:51,157 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 153 transitions, 342 flow [2023-08-04 00:23:51,159 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 152 transitions, 336 flow [2023-08-04 00:23:51,159 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:23:51,160 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 152 transitions, 336 flow [2023-08-04 00:23:51,160 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 152 transitions, 336 flow [2023-08-04 00:23:51,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 152 transitions, 336 flow [2023-08-04 00:23:51,236 INFO L124 PetriNetUnfolderBase]: 93/1379 cut-off events. [2023-08-04 00:23:51,236 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 00:23:51,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 1379 events. 93/1379 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9493 event pairs, 0 based on Foata normal form. 0/1214 useless extension candidates. Maximal degree in co-relation 1000. Up to 54 conditions per place. [2023-08-04 00:23:51,251 INFO L119 LiptonReduction]: Number of co-enabled transitions 6468 [2023-08-04 00:23:53,847 INFO L134 LiptonReduction]: Checked pairs total: 18476 [2023-08-04 00:23:53,848 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-04 00:23:53,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:23:53,849 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;@739fc68, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:23:53,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 00:23:53,853 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:23:53,853 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-08-04 00:23:53,853 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:23:53,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:23:53,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 00:23:53,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 00:23:53,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:23:53,854 INFO L85 PathProgramCache]: Analyzing trace with hash 863880019, now seen corresponding path program 1 times [2023-08-04 00:23:53,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:23:53,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790606421] [2023-08-04 00:23:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:23:53,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:23:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:23:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:23:53,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:23:53,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790606421] [2023-08-04 00:23:53,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790606421] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:23:53,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:23:53,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:23:53,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914195843] [2023-08-04 00:23:53,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:23:53,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:23:53,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:23:53,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:23:53,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:23:53,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 267 [2023-08-04 00:23:53,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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) [2023-08-04 00:23:53,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:23:53,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 267 [2023-08-04 00:23:53,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand