/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-atomic_szymanski_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 22:16:10,138 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 22:16:10,521 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 22:16:10,525 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 22:16:10,526 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 22:16:10,526 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 22:16:10,526 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 22:16:10,555 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 22:16:10,555 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 22:16:10,556 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 22:16:10,556 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 22:16:10,556 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 22:16:10,557 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 22:16:10,557 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 22:16:10,558 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 22:16:10,558 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 22:16:10,558 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 22:16:10,561 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 22:16:10,561 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 22:16:10,561 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 22:16:10,562 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 22:16:10,562 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 22:16:10,563 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 22:16:10,563 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 22:16:10,564 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 22:16:10,564 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 22:16:10,564 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 22:16:10,565 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 22:16:10,565 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 22:16:10,565 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 22:16:10,566 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:16:10,566 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 22:16:10,566 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 22:16:10,567 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 22:16:10,567 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 22:16:10,567 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 22:16:10,567 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 22:16:10,567 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 22:16:10,567 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 22:16:10,567 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 22:16:10,568 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 22:16:10,568 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 22:16:10,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 22:16:10,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 22:16:10,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 22:16:10,776 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 22:16:10,776 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 22:16:10,778 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-atomic_szymanski_bound2.i [2023-08-03 22:16:11,859 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 22:16:12,087 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 22:16:12,088 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-atomic_szymanski_bound2.i [2023-08-03 22:16:12,103 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/861ddaac8/e3fbaba6a0994d5a85c4e4feda165b23/FLAG361b81fe7 [2023-08-03 22:16:12,115 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/861ddaac8/e3fbaba6a0994d5a85c4e4feda165b23 [2023-08-03 22:16:12,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 22:16:12,118 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 22:16:12,119 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 22:16:12,119 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 22:16:12,122 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 22:16:12,123 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:16:12" (1/1) ... [2023-08-03 22:16:12,124 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@297262f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:16:12, skipping insertion in model container [2023-08-03 22:16:12,124 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:16:12" (1/1) ... [2023-08-03 22:16:12,170 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 22:16:12,304 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-03 22:16:12,442 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-atomic_szymanski_bound2.i[31505,31518] [2023-08-03 22:16:12,449 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-atomic_szymanski_bound2.i[32915,32928] [2023-08-03 22:16:12,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:16:12,477 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 22:16:12,501 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-03 22:16:12,506 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-03 22:16:12,508 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-03 22:16:12,533 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-atomic_szymanski_bound2.i[31505,31518] [2023-08-03 22:16:12,536 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-atomic_szymanski_bound2.i[32915,32928] [2023-08-03 22:16:12,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:16:12,587 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 22:16:12,587 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 22:16:12,587 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 22:16:12,593 INFO L206 MainTranslator]: Completed translation [2023-08-03 22:16:12,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:16:12 WrapperNode [2023-08-03 22:16:12,595 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 22:16:12,596 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 22:16:12,596 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 22:16:12,596 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 22:16:12,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:16:12" (1/1) ... [2023-08-03 22:16:12,626 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:16:12" (1/1) ... [2023-08-03 22:16:12,646 INFO L138 Inliner]: procedures = 171, calls = 75, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2023-08-03 22:16:12,647 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 22:16:12,647 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 22:16:12,648 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 22:16:12,648 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 22:16:12,656 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:16:12" (1/1) ... [2023-08-03 22:16:12,656 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:16:12" (1/1) ... [2023-08-03 22:16:12,660 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:16:12" (1/1) ... [2023-08-03 22:16:12,661 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:16:12" (1/1) ... [2023-08-03 22:16:12,666 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:16:12" (1/1) ... [2023-08-03 22:16:12,677 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:16:12" (1/1) ... [2023-08-03 22:16:12,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:16:12" (1/1) ... [2023-08-03 22:16:12,680 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:16:12" (1/1) ... [2023-08-03 22:16:12,682 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 22:16:12,683 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 22:16:12,683 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 22:16:12,683 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 22:16:12,684 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:16:12" (1/1) ... [2023-08-03 22:16:12,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:16:12,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:16:12,726 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 22:16:12,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 22:16:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 22:16:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-03 22:16:12,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-03 22:16:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-03 22:16:12,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-03 22:16:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 22:16:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 22:16:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 22:16:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 22:16:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 22:16:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 22:16:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 22:16:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 22:16:12,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 22:16:12,761 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 22:16:12,866 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 22:16:12,868 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 22:16:13,086 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 22:16:13,091 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 22:16:13,091 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-03 22:16:13,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:16:13 BoogieIcfgContainer [2023-08-03 22:16:13,094 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 22:16:13,095 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 22:16:13,096 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 22:16:13,099 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 22:16:13,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 10:16:12" (1/3) ... [2023-08-03 22:16:13,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54eb33ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:16:13, skipping insertion in model container [2023-08-03 22:16:13,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:16:12" (2/3) ... [2023-08-03 22:16:13,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54eb33ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:16:13, skipping insertion in model container [2023-08-03 22:16:13,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:16:13" (3/3) ... [2023-08-03 22:16:13,101 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-atomic_szymanski_bound2.i [2023-08-03 22:16:13,112 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 22:16:13,118 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 22:16:13,118 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 22:16:13,118 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 22:16:13,199 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 22:16:13,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 143 transitions, 308 flow [2023-08-03 22:16:13,323 INFO L124 PetriNetUnfolderBase]: 52/282 cut-off events. [2023-08-03 22:16:13,323 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-03 22:16:13,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 282 events. 52/282 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1051 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-03 22:16:13,338 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 143 transitions, 308 flow [2023-08-03 22:16:13,345 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 143 transitions, 308 flow [2023-08-03 22:16:13,349 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:16:13,357 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 143 transitions, 308 flow [2023-08-03 22:16:13,360 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 143 transitions, 308 flow [2023-08-03 22:16:13,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 143 transitions, 308 flow [2023-08-03 22:16:13,419 INFO L124 PetriNetUnfolderBase]: 52/282 cut-off events. [2023-08-03 22:16:13,419 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-03 22:16:13,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 282 events. 52/282 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1051 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-03 22:16:13,435 INFO L119 LiptonReduction]: Number of co-enabled transitions 9216 [2023-08-03 22:16:15,293 INFO L134 LiptonReduction]: Checked pairs total: 18870 [2023-08-03 22:16:15,293 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-03 22:16:15,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:16:15,311 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;@7b49fedf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:16:15,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 22:16:15,315 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:16:15,316 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-08-03 22:16:15,316 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:16:15,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:16:15,316 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 22:16:15,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:16:15,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:16:15,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1037632247, now seen corresponding path program 1 times [2023-08-03 22:16:15,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:16:15,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917934778] [2023-08-03 22:16:15,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:16:15,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:16:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:16:15,409 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:16:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:16:15,440 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:16:15,441 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:16:15,442 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 22:16:15,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 22:16:15,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 22:16:15,445 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:16:15,447 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-03 22:16:15,448 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 22:16:15,448 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 22:16:15,487 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 22:16:15,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 221 transitions, 490 flow [2023-08-03 22:16:15,601 INFO L124 PetriNetUnfolderBase]: 181/879 cut-off events. [2023-08-03 22:16:15,602 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-03 22:16:15,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 879 events. 181/879 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4784 event pairs, 1 based on Foata normal form. 0/703 useless extension candidates. Maximal degree in co-relation 534. Up to 32 conditions per place. [2023-08-03 22:16:15,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 221 transitions, 490 flow [2023-08-03 22:16:15,623 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 221 transitions, 490 flow [2023-08-03 22:16:15,623 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:16:15,623 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 221 transitions, 490 flow [2023-08-03 22:16:15,623 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 221 transitions, 490 flow [2023-08-03 22:16:15,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 221 transitions, 490 flow [2023-08-03 22:16:15,721 INFO L124 PetriNetUnfolderBase]: 181/879 cut-off events. [2023-08-03 22:16:15,721 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-03 22:16:15,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 879 events. 181/879 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4784 event pairs, 1 based on Foata normal form. 0/703 useless extension candidates. Maximal degree in co-relation 534. Up to 32 conditions per place. [2023-08-03 22:16:15,767 INFO L119 LiptonReduction]: Number of co-enabled transitions 30240 [2023-08-03 22:16:17,837 INFO L134 LiptonReduction]: Checked pairs total: 70718 [2023-08-03 22:16:17,837 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-03 22:16:17,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:16:17,841 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;@7b49fedf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:16:17,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 22:16:17,849 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:16:17,849 INFO L124 PetriNetUnfolderBase]: 12/87 cut-off events. [2023-08-03 22:16:17,849 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 22:16:17,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:16:17,849 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 22:16:17,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:16:17,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:16:17,850 INFO L85 PathProgramCache]: Analyzing trace with hash -876682995, now seen corresponding path program 1 times [2023-08-03 22:16:17,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:16:17,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058168190] [2023-08-03 22:16:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:16:17,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:16:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:16:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:16:18,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:16:18,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058168190] [2023-08-03 22:16:18,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058168190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:16:18,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599740896] [2023-08-03 22:16:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:16:18,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:16:18,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:16:18,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:16:18,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 22:16:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:16:18,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 22:16:18,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:16:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:16:18,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:16:18,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599740896] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:16:18,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:16:18,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 22:16:18,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541070163] [2023-08-03 22:16:18,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:16:18,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:16:18,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:16:18,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:16:18,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:16:18,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 368 [2023-08-03 22:16:18,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 181.6) internal successors, (908), 5 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:16:18,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:16:18,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 368 [2023-08-03 22:16:18,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:18:16,300 INFO L124 PetriNetUnfolderBase]: 1523538/1883350 cut-off events. [2023-08-03 22:18:16,300 INFO L125 PetriNetUnfolderBase]: For 46990/46990 co-relation queries the response was YES. [2023-08-03 22:18:20,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3686786 conditions, 1883350 events. 1523538/1883350 cut-off events. For 46990/46990 co-relation queries the response was YES. Maximal size of possible extension queue 37584. Compared 12304055 event pairs, 547211 based on Foata normal form. 0/1122143 useless extension candidates. Maximal degree in co-relation 565126. Up to 1775244 conditions per place. [2023-08-03 22:18:25,605 INFO L140 encePairwiseOnDemand]: 363/368 looper letters, 98 selfloop transitions, 5 changer transitions 16/146 dead transitions. [2023-08-03 22:18:25,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 146 transitions, 570 flow [2023-08-03 22:18:25,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:18:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:18:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1021 transitions. [2023-08-03 22:18:25,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548913043478261 [2023-08-03 22:18:25,648 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1021 transitions. [2023-08-03 22:18:25,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1021 transitions. [2023-08-03 22:18:25,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:18:25,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1021 transitions. [2023-08-03 22:18:25,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 204.2) internal successors, (1021), 5 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:25,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 368.0) internal successors, (2208), 6 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:25,708 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 368.0) internal successors, (2208), 6 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:25,728 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 262 flow. Second operand 5 states and 1021 transitions. [2023-08-03 22:18:25,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 146 transitions, 570 flow [2023-08-03 22:18:28,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 146 transitions, 564 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:18:28,437 INFO L231 Difference]: Finished difference. Result has 89 places, 92 transitions, 219 flow [2023-08-03 22:18:28,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=219, PETRI_PLACES=89, PETRI_TRANSITIONS=92} [2023-08-03 22:18:28,458 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 2 predicate places. [2023-08-03 22:18:28,459 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 92 transitions, 219 flow [2023-08-03 22:18:28,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.6) internal successors, (908), 5 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:28,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:18:28,460 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 22:18:28,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 22:18:28,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:18:28,665 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:18:28,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:18:28,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1883065872, now seen corresponding path program 1 times [2023-08-03 22:18:28,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:18:28,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123247364] [2023-08-03 22:18:28,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:18:28,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:18:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:18:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 22:18:28,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:18:28,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123247364] [2023-08-03 22:18:28,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123247364] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:18:28,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:18:28,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:18:28,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358211345] [2023-08-03 22:18:28,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:18:28,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:18:28,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:18:28,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:18:28,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:18:28,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 368 [2023-08-03 22:18:28,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 92 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:18:28,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:18:28,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 368 [2023-08-03 22:18:28,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:19:04,304 INFO L124 PetriNetUnfolderBase]: 609933/756184 cut-off events. [2023-08-03 22:19:04,305 INFO L125 PetriNetUnfolderBase]: For 6335/6335 co-relation queries the response was YES. [2023-08-03 22:19:05,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1474778 conditions, 756184 events. 609933/756184 cut-off events. For 6335/6335 co-relation queries the response was YES. Maximal size of possible extension queue 16495. Compared 4621612 event pairs, 272772 based on Foata normal form. 1/451126 useless extension candidates. Maximal degree in co-relation 244433. Up to 711589 conditions per place. [2023-08-03 22:19:07,583 INFO L140 encePairwiseOnDemand]: 365/368 looper letters, 75 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-08-03 22:19:07,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 104 transitions, 396 flow [2023-08-03 22:19:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:19:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:19:07,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-08-03 22:19:07,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615942028985508 [2023-08-03 22:19:07,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-08-03 22:19:07,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-08-03 22:19:07,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:19:07,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-08-03 22:19:07,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:07,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:07,591 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:07,591 INFO L175 Difference]: Start difference. First operand has 89 places, 92 transitions, 219 flow. Second operand 3 states and 620 transitions. [2023-08-03 22:19:07,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 104 transitions, 396 flow [2023-08-03 22:19:07,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 104 transitions, 393 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 22:19:07,600 INFO L231 Difference]: Finished difference. Result has 82 places, 91 transitions, 215 flow [2023-08-03 22:19:07,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=82, PETRI_TRANSITIONS=91} [2023-08-03 22:19:07,601 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -5 predicate places. [2023-08-03 22:19:07,601 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 91 transitions, 215 flow [2023-08-03 22:19:07,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:07,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:19:07,602 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:19:07,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 22:19:07,602 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:19:07,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:19:07,602 INFO L85 PathProgramCache]: Analyzing trace with hash -534763631, now seen corresponding path program 1 times [2023-08-03 22:19:07,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:19:07,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122715197] [2023-08-03 22:19:07,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:19:07,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:19:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:19:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 22:19:07,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:19:07,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122715197] [2023-08-03 22:19:07,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122715197] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:19:07,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938593709] [2023-08-03 22:19:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:19:07,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:19:07,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:19:07,678 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:19:07,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 22:19:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:19:07,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:19:07,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:19:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 22:19:07,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:19:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 22:19:07,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938593709] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:19:07,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:19:07,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-03 22:19:07,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934181221] [2023-08-03 22:19:07,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:19:07,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 22:19:07,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:19:07,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 22:19:07,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 22:19:07,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 368 [2023-08-03 22:19:07,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 91 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:07,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:19:07,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 368 [2023-08-03 22:19:07,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:19:43,433 INFO L124 PetriNetUnfolderBase]: 559365/699196 cut-off events. [2023-08-03 22:19:43,433 INFO L125 PetriNetUnfolderBase]: For 4977/4977 co-relation queries the response was YES. [2023-08-03 22:19:45,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1358405 conditions, 699196 events. 559365/699196 cut-off events. For 4977/4977 co-relation queries the response was YES. Maximal size of possible extension queue 15804. Compared 4384918 event pairs, 166072 based on Foata normal form. 12/422110 useless extension candidates. Maximal degree in co-relation 253056. Up to 652513 conditions per place. [2023-08-03 22:19:47,797 INFO L140 encePairwiseOnDemand]: 365/368 looper letters, 98 selfloop transitions, 3 changer transitions 0/128 dead transitions. [2023-08-03 22:19:47,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 128 transitions, 490 flow [2023-08-03 22:19:47,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:19:47,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:19:47,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 822 transitions. [2023-08-03 22:19:47,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584239130434783 [2023-08-03 22:19:47,800 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 822 transitions. [2023-08-03 22:19:47,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 822 transitions. [2023-08-03 22:19:47,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:19:47,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 822 transitions. [2023-08-03 22:19:47,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.5) internal successors, (822), 4 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:47,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 368.0) internal successors, (1840), 5 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:47,806 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 368.0) internal successors, (1840), 5 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:47,806 INFO L175 Difference]: Start difference. First operand has 82 places, 91 transitions, 215 flow. Second operand 4 states and 822 transitions. [2023-08-03 22:19:47,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 128 transitions, 490 flow [2023-08-03 22:19:47,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 128 transitions, 486 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:19:47,809 INFO L231 Difference]: Finished difference. Result has 83 places, 90 transitions, 212 flow [2023-08-03 22:19:47,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=83, PETRI_TRANSITIONS=90} [2023-08-03 22:19:47,810 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -4 predicate places. [2023-08-03 22:19:47,810 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 90 transitions, 212 flow [2023-08-03 22:19:47,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:47,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:19:47,810 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:19:47,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 22:19:48,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 22:19:48,015 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:19:48,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:19:48,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1776689713, now seen corresponding path program 1 times [2023-08-03 22:19:48,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:19:48,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255610145] [2023-08-03 22:19:48,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:19:48,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:19:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:19:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:19:48,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:19:48,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255610145] [2023-08-03 22:19:48,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255610145] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:19:48,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256680253] [2023-08-03 22:19:48,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:19:48,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:19:48,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:19:48,161 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:19:48,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 22:19:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:19:48,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 22:19:48,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:19:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:19:48,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:19:48,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256680253] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:19:48,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:19:48,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 22:19:48,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258021251] [2023-08-03 22:19:48,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:19:48,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:19:48,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:19:48,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:19:48,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:19:48,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 368 [2023-08-03 22:19:48,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 90 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 182.6) internal successors, (913), 5 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:19:48,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:19:48,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 368 [2023-08-03 22:19:48,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:20:15,651 INFO L124 PetriNetUnfolderBase]: 500308/605869 cut-off events. [2023-08-03 22:20:15,651 INFO L125 PetriNetUnfolderBase]: For 3957/3957 co-relation queries the response was YES. [2023-08-03 22:20:16,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1195486 conditions, 605869 events. 500308/605869 cut-off events. For 3957/3957 co-relation queries the response was YES. Maximal size of possible extension queue 13651. Compared 3385284 event pairs, 23484 based on Foata normal form. 0/377064 useless extension candidates. Maximal degree in co-relation 298873. Up to 416860 conditions per place. [2023-08-03 22:20:16,950 INFO L140 encePairwiseOnDemand]: 364/368 looper letters, 0 selfloop transitions, 0 changer transitions 207/207 dead transitions. [2023-08-03 22:20:16,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 207 transitions, 806 flow [2023-08-03 22:20:16,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:20:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:20:16,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1081 transitions. [2023-08-03 22:20:16,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2023-08-03 22:20:16,952 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1081 transitions. [2023-08-03 22:20:16,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1081 transitions. [2023-08-03 22:20:16,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:20:16,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1081 transitions. [2023-08-03 22:20:16,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 216.2) internal successors, (1081), 5 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:20:16,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 368.0) internal successors, (2208), 6 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:20:16,960 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 368.0) internal successors, (2208), 6 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:20:16,960 INFO L175 Difference]: Start difference. First operand has 83 places, 90 transitions, 212 flow. Second operand 5 states and 1081 transitions. [2023-08-03 22:20:16,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 207 transitions, 806 flow [2023-08-03 22:20:17,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 207 transitions, 799 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 22:20:17,562 INFO L231 Difference]: Finished difference. Result has 82 places, 0 transitions, 0 flow [2023-08-03 22:20:17,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=82, PETRI_TRANSITIONS=0} [2023-08-03 22:20:17,563 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -5 predicate places. [2023-08-03 22:20:17,563 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 0 transitions, 0 flow [2023-08-03 22:20:17,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 182.6) internal successors, (913), 5 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:20:17,564 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 22:20:17,564 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 22:20:17,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 22:20:17,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:20:17,770 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-03 22:20:17,770 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-03 22:20:17,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 221 transitions, 490 flow [2023-08-03 22:20:18,095 INFO L124 PetriNetUnfolderBase]: 181/879 cut-off events. [2023-08-03 22:20:18,095 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-03 22:20:18,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 879 events. 181/879 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4784 event pairs, 1 based on Foata normal form. 0/703 useless extension candidates. Maximal degree in co-relation 534. Up to 32 conditions per place. [2023-08-03 22:20:18,099 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 221 transitions, 490 flow [2023-08-03 22:20:18,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 221 transitions, 490 flow [2023-08-03 22:20:18,103 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:20:18,103 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 221 transitions, 490 flow [2023-08-03 22:20:18,103 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 221 transitions, 490 flow [2023-08-03 22:20:18,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 221 transitions, 490 flow [2023-08-03 22:20:18,176 INFO L124 PetriNetUnfolderBase]: 181/879 cut-off events. [2023-08-03 22:20:18,177 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-03 22:20:18,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 879 events. 181/879 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4784 event pairs, 1 based on Foata normal form. 0/703 useless extension candidates. Maximal degree in co-relation 534. Up to 32 conditions per place. [2023-08-03 22:20:18,209 INFO L119 LiptonReduction]: Number of co-enabled transitions 30240 [2023-08-03 22:20:20,322 INFO L134 LiptonReduction]: Checked pairs total: 70961 [2023-08-03 22:20:20,323 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-03 22:20:20,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 22:20:20,329 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;@7b49fedf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:20:20,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-03 22:20:20,333 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:20:20,334 INFO L124 PetriNetUnfolderBase]: 13/92 cut-off events. [2023-08-03 22:20:20,334 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 22:20:20,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:20:20,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:20:20,334 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 22:20:20,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:20:20,334 INFO L85 PathProgramCache]: Analyzing trace with hash -529265503, now seen corresponding path program 1 times [2023-08-03 22:20:20,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:20:20,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273630753] [2023-08-03 22:20:20,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:20:20,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:20:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:20:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:20:20,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:20:20,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273630753] [2023-08-03 22:20:20,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273630753] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:20:20,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:20:20,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:20:20,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033946932] [2023-08-03 22:20:20,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:20:20,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:20:20,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:20:20,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:20:20,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:20:20,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 368 [2023-08-03 22:20:20,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:20:20,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:20:20,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 368 [2023-08-03 22:20:20,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand