/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_safe027_power.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:01:21,541 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:01:21,617 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:01:21,623 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:01:21,623 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:01:21,624 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:01:21,624 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:01:21,650 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:01:21,651 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:01:21,654 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:01:21,655 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:01:21,655 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:01:21,656 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:01:21,657 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:01:21,657 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:01:21,658 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:01:21,658 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:01:21,658 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:01:21,659 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:01:21,659 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:01:21,659 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:01:21,659 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:01:21,660 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:01:21,660 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:01:21,661 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:01:21,661 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:01:21,661 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:01:21,662 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:01:21,662 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:01:21,662 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:01:21,663 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:01:21,663 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:01:21,664 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:01:21,664 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:01:21,664 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:01:21,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:01:21,664 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:01:21,665 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:01:21,665 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:01:21,665 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:01:21,665 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:01:21,665 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:01:21,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:01:21,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:01:21,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:01:21,937 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:01:21,938 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:01:21,939 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_power.oepc_bound2.i [2023-08-04 01:01:23,104 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:01:23,304 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:01:23,305 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_power.oepc_bound2.i [2023-08-04 01:01:23,321 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5a3866f9/18f4e353f0044716be1a57b0d891938a/FLAGf02d882f3 [2023-08-04 01:01:23,333 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5a3866f9/18f4e353f0044716be1a57b0d891938a [2023-08-04 01:01:23,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:01:23,336 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:01:23,337 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:01:23,337 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:01:23,340 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:01:23,341 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:01:23" (1/1) ... [2023-08-04 01:01:23,341 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14ae364a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:23, skipping insertion in model container [2023-08-04 01:01:23,341 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:01:23" (1/1) ... [2023-08-04 01:01:23,408 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:01:23,588 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_safe027_power.oepc_bound2.i[995,1008] [2023-08-04 01:01:23,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:01:23,825 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:01:23,838 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_safe027_power.oepc_bound2.i[995,1008] [2023-08-04 01:01:23,860 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 01:01:23,862 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 01:01:23,926 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:01:23,958 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:01:23,959 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:01:23,965 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:01:23,965 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:23 WrapperNode [2023-08-04 01:01:23,965 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:01:23,966 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:01:23,966 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:01:23,966 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:01:23,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:23" (1/1) ... [2023-08-04 01:01:24,010 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:23" (1/1) ... [2023-08-04 01:01:24,046 INFO L138 Inliner]: procedures = 177, calls = 84, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 185 [2023-08-04 01:01:24,046 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:01:24,047 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:01:24,047 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:01:24,047 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:01:24,058 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:23" (1/1) ... [2023-08-04 01:01:24,058 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:23" (1/1) ... [2023-08-04 01:01:24,078 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:23" (1/1) ... [2023-08-04 01:01:24,078 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:23" (1/1) ... [2023-08-04 01:01:24,088 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:23" (1/1) ... [2023-08-04 01:01:24,105 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:23" (1/1) ... [2023-08-04 01:01:24,108 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:23" (1/1) ... [2023-08-04 01:01:24,109 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:23" (1/1) ... [2023-08-04 01:01:24,113 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:01:24,114 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:01:24,114 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:01:24,114 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:01:24,115 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:23" (1/1) ... [2023-08-04 01:01:24,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:01:24,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:01:24,162 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 01:01:24,181 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 01:01:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 01:01:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:01:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 01:01:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:01:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:01:24,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:01:24,200 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 01:01:24,200 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 01:01:24,200 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 01:01:24,201 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 01:01:24,201 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 01:01:24,201 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 01:01:24,201 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 01:01:24,201 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 01:01:24,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:01:24,202 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 01:01:24,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:01:24,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:01:24,203 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 01:01:24,355 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:01:24,357 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:01:24,727 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:01:24,977 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:01:24,977 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 01:01:24,980 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:01:24 BoogieIcfgContainer [2023-08-04 01:01:24,981 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:01:24,983 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:01:24,984 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:01:24,987 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:01:24,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:01:23" (1/3) ... [2023-08-04 01:01:24,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b69352c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:01:24, skipping insertion in model container [2023-08-04 01:01:24,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:23" (2/3) ... [2023-08-04 01:01:24,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b69352c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:01:24, skipping insertion in model container [2023-08-04 01:01:24,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:01:24" (3/3) ... [2023-08-04 01:01:24,990 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe027_power.oepc_bound2.i [2023-08-04 01:01:24,999 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:01:25,008 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:01:25,008 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 01:01:25,009 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:01:25,101 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:01:25,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 171 transitions, 362 flow [2023-08-04 01:01:25,428 INFO L124 PetriNetUnfolderBase]: 62/926 cut-off events. [2023-08-04 01:01:25,428 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:01:25,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 926 events. 62/926 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5503 event pairs, 0 based on Foata normal form. 0/818 useless extension candidates. Maximal degree in co-relation 563. Up to 32 conditions per place. [2023-08-04 01:01:25,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 171 transitions, 362 flow [2023-08-04 01:01:25,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 140 transitions, 300 flow [2023-08-04 01:01:25,445 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:01:25,458 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 140 transitions, 300 flow [2023-08-04 01:01:25,462 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 140 transitions, 300 flow [2023-08-04 01:01:25,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 140 transitions, 300 flow [2023-08-04 01:01:25,514 INFO L124 PetriNetUnfolderBase]: 14/430 cut-off events. [2023-08-04 01:01:25,514 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:01:25,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 430 events. 14/430 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1803 event pairs, 0 based on Foata normal form. 0/402 useless extension candidates. Maximal degree in co-relation 315. Up to 16 conditions per place. [2023-08-04 01:01:25,521 INFO L119 LiptonReduction]: Number of co-enabled transitions 1876 [2023-08-04 01:01:32,062 INFO L134 LiptonReduction]: Checked pairs total: 4362 [2023-08-04 01:01:32,062 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-04 01:01:32,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:01:32,081 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;@4a82619, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:01:32,082 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 01:01:32,087 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:01:32,087 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-04 01:01:32,087 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:01:32,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:01:32,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:01:32,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:01:32,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:01:32,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1468382738, now seen corresponding path program 1 times [2023-08-04 01:01:32,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:01:32,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809808876] [2023-08-04 01:01:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:01:32,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:01:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:01:32,205 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:01:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:01:32,251 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:01:32,252 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:01:32,253 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 01:01:32,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 01:01:32,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 01:01:32,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 01:01:32,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:01:32,256 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 01:01:32,258 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (1/2) [2023-08-04 01:01:32,258 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:01:32,258 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:01:32,318 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:01:32,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 198 transitions, 444 flow [2023-08-04 01:01:32,907 INFO L124 PetriNetUnfolderBase]: 282/4202 cut-off events. [2023-08-04 01:01:32,908 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 01:01:32,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4491 conditions, 4202 events. 282/4202 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 40066 event pairs, 0 based on Foata normal form. 0/3719 useless extension candidates. Maximal degree in co-relation 3051. Up to 162 conditions per place. [2023-08-04 01:01:32,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 198 transitions, 444 flow [2023-08-04 01:01:32,944 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 167 transitions, 382 flow [2023-08-04 01:01:32,945 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:01:32,945 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 167 transitions, 382 flow [2023-08-04 01:01:32,945 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 167 transitions, 382 flow [2023-08-04 01:01:32,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 167 transitions, 382 flow [2023-08-04 01:01:33,209 INFO L124 PetriNetUnfolderBase]: 39/1691 cut-off events. [2023-08-04 01:01:33,210 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 01:01:33,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1980 conditions, 1691 events. 39/1691 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 12855 event pairs, 0 based on Foata normal form. 0/1613 useless extension candidates. Maximal degree in co-relation 1377. Up to 81 conditions per place. [2023-08-04 01:01:33,253 INFO L119 LiptonReduction]: Number of co-enabled transitions 4992 [2023-08-04 01:01:41,413 INFO L134 LiptonReduction]: Checked pairs total: 15248 [2023-08-04 01:01:41,413 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-08-04 01:01:41,415 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:01:41,416 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;@4a82619, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:01:41,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 01:01:41,425 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:01:41,425 INFO L124 PetriNetUnfolderBase]: 0/83 cut-off events. [2023-08-04 01:01:41,426 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 01:01:41,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:01:41,426 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:01:41,426 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:01:41,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:01:41,427 INFO L85 PathProgramCache]: Analyzing trace with hash 279031351, now seen corresponding path program 1 times [2023-08-04 01:01:41,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:01:41,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159110164] [2023-08-04 01:01:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:01:41,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:01:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:01:41,647 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 01:01:41,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:01:41,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159110164] [2023-08-04 01:01:41,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159110164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:01:41,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189666082] [2023-08-04 01:01:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:01:41,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:01:41,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:01:41,657 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 01:01:41,688 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 01:01:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:01:41,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:01:41,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:01:41,895 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 01:01:41,896 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:01:41,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189666082] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:01:41,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:01:41,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:01:41,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859977678] [2023-08-04 01:01:41,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:01:41,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:01:41,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:01:41,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:01:41,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:01:41,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 322 [2023-08-04 01:01:41,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 49 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 171.6) internal successors, (858), 5 states have internal predecessors, (858), 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 01:01:41,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:01:41,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 322 [2023-08-04 01:01:41,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:03:41,211 INFO L124 PetriNetUnfolderBase]: 673616/837869 cut-off events. [2023-08-04 01:03:41,211 INFO L125 PetriNetUnfolderBase]: For 49676/49676 co-relation queries the response was YES. [2023-08-04 01:03:43,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1727179 conditions, 837869 events. 673616/837869 cut-off events. For 49676/49676 co-relation queries the response was YES. Maximal size of possible extension queue 17117. Compared 5233114 event pairs, 505076 based on Foata normal form. 0/833951 useless extension candidates. Maximal degree in co-relation 478179. Up to 830096 conditions per place. [2023-08-04 01:03:47,166 INFO L140 encePairwiseOnDemand]: 318/322 looper letters, 44 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-08-04 01:03:47,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 258 flow [2023-08-04 01:03:47,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:03:47,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:03:47,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 900 transitions. [2023-08-04 01:03:47,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590062111801242 [2023-08-04 01:03:47,184 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 900 transitions. [2023-08-04 01:03:47,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 900 transitions. [2023-08-04 01:03:47,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:03:47,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 900 transitions. [2023-08-04 01:03:47,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:03:47,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 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 01:03:47,201 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 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 01:03:47,203 INFO L175 Difference]: Start difference. First operand has 66 places, 49 transitions, 146 flow. Second operand 5 states and 900 transitions. [2023-08-04 01:03:47,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 258 flow [2023-08-04 01:03:47,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 58 transitions, 251 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-04 01:03:47,382 INFO L231 Difference]: Finished difference. Result has 69 places, 51 transitions, 156 flow [2023-08-04 01:03:47,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=69, PETRI_TRANSITIONS=51} [2023-08-04 01:03:47,386 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-08-04 01:03:47,386 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 51 transitions, 156 flow [2023-08-04 01:03:47,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.6) internal successors, (858), 5 states have internal predecessors, (858), 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 01:03:47,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:03:47,387 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:03:47,397 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 01:03:47,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:03:47,594 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:03:47,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:03:47,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2075675552, now seen corresponding path program 1 times [2023-08-04 01:03:47,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:03:47,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893520467] [2023-08-04 01:03:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:03:47,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:03:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:03:47,648 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 01:03:47,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:03:47,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893520467] [2023-08-04 01:03:47,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893520467] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:03:47,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:03:47,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:03:47,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759692425] [2023-08-04 01:03:47,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:03:47,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:03:47,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:03:47,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:03:47,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:03:47,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 322 [2023-08-04 01:03:47,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 51 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 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 01:03:47,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:03:47,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 322 [2023-08-04 01:03:47,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand