/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_safe035_power_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:13:28,587 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:13:28,624 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:13:28,626 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:13:28,627 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:13:28,627 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:13:28,627 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:13:28,640 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:13:28,640 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:13:28,641 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:13:28,641 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:13:28,641 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:13:28,641 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:13:28,642 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:13:28,642 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:13:28,642 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:13:28,642 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:13:28,643 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:13:28,643 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:13:28,643 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:13:28,643 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:13:28,644 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:13:28,644 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:13:28,644 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:13:28,644 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:13:28,644 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:13:28,644 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:13:28,645 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:13:28,645 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:13:28,645 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:13:28,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:13:28,645 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:13:28,646 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:13:28,646 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:13:28,646 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:13:28,646 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:13:28,646 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:13:28,646 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:13:28,646 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:13:28,646 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:13:28,647 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:13:28,647 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:13:28,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:13:28,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:13:28,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:13:28,787 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:13:28,789 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:13:28,790 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe035_power_bound2.i [2023-08-04 01:13:29,839 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:13:30,024 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:13:30,024 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe035_power_bound2.i [2023-08-04 01:13:30,033 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beb4ee473/4e397cb49c934de4b35ef6addaa7acf0/FLAGbec0197e5 [2023-08-04 01:13:30,042 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beb4ee473/4e397cb49c934de4b35ef6addaa7acf0 [2023-08-04 01:13:30,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:13:30,044 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:13:30,045 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:13:30,045 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:13:30,055 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:13:30,056 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:13:30" (1/1) ... [2023-08-04 01:13:30,056 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1574d00c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:13:30, skipping insertion in model container [2023-08-04 01:13:30,056 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:13:30" (1/1) ... [2023-08-04 01:13:30,120 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:13:30,257 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_safe035_power_bound2.i[947,960] [2023-08-04 01:13:30,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:13:30,493 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:13:30,500 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_safe035_power_bound2.i[947,960] [2023-08-04 01:13:30,505 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 01:13:30,506 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 01:13:30,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:13:30,562 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:13:30,562 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:13:30,567 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:13:30,567 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:13:30 WrapperNode [2023-08-04 01:13:30,569 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:13:30,570 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:13:30,570 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:13:30,570 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:13:30,574 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:13:30" (1/1) ... [2023-08-04 01:13:30,598 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:13:30" (1/1) ... [2023-08-04 01:13:30,643 INFO L138 Inliner]: procedures = 176, calls = 60, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 197 [2023-08-04 01:13:30,644 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:13:30,644 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:13:30,644 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:13:30,644 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:13:30,650 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:13:30" (1/1) ... [2023-08-04 01:13:30,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:13:30" (1/1) ... [2023-08-04 01:13:30,653 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:13:30" (1/1) ... [2023-08-04 01:13:30,653 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:13:30" (1/1) ... [2023-08-04 01:13:30,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:13:30" (1/1) ... [2023-08-04 01:13:30,680 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:13:30" (1/1) ... [2023-08-04 01:13:30,681 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:13:30" (1/1) ... [2023-08-04 01:13:30,683 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:13:30" (1/1) ... [2023-08-04 01:13:30,686 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:13:30,686 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:13:30,687 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:13:30,687 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:13:30,687 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:13:30" (1/1) ... [2023-08-04 01:13:30,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:13:30,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:13:30,720 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 01:13:30,738 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 01:13:30,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:13:30,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 01:13:30,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:13:30,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:13:30,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:13:30,761 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 01:13:30,761 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 01:13:30,761 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 01:13:30,761 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 01:13:30,761 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 01:13:30,761 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 01:13:30,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:13:30,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 01:13:30,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:13:30,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:13:30,763 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 01:13:30,926 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:13:30,928 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:13:31,257 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:13:31,375 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:13:31,375 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 01:13:31,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:13:31 BoogieIcfgContainer [2023-08-04 01:13:31,377 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:13:31,379 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:13:31,379 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:13:31,382 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:13:31,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:13:30" (1/3) ... [2023-08-04 01:13:31,383 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2a2da7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:13:31, skipping insertion in model container [2023-08-04 01:13:31,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:13:30" (2/3) ... [2023-08-04 01:13:31,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2a2da7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:13:31, skipping insertion in model container [2023-08-04 01:13:31,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:13:31" (3/3) ... [2023-08-04 01:13:31,385 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe035_power_bound2.i [2023-08-04 01:13:31,390 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:13:31,397 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:13:31,397 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 01:13:31,397 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:13:31,444 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:13:31,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 133 transitions, 281 flow [2023-08-04 01:13:31,634 INFO L124 PetriNetUnfolderBase]: 30/459 cut-off events. [2023-08-04 01:13:31,635 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:13:31,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 459 events. 30/459 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2051 event pairs, 0 based on Foata normal form. 0/403 useless extension candidates. Maximal degree in co-relation 272. Up to 16 conditions per place. [2023-08-04 01:13:31,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 133 transitions, 281 flow [2023-08-04 01:13:31,643 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 104 transitions, 223 flow [2023-08-04 01:13:31,645 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:13:31,657 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 104 transitions, 223 flow [2023-08-04 01:13:31,660 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 104 transitions, 223 flow [2023-08-04 01:13:31,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 104 transitions, 223 flow [2023-08-04 01:13:31,686 INFO L124 PetriNetUnfolderBase]: 6/227 cut-off events. [2023-08-04 01:13:31,686 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:13:31,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 227 events. 6/227 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 689 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 156. Up to 8 conditions per place. [2023-08-04 01:13:31,688 INFO L119 LiptonReduction]: Number of co-enabled transitions 1636 [2023-08-04 01:13:33,938 INFO L134 LiptonReduction]: Checked pairs total: 4998 [2023-08-04 01:13:33,939 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-08-04 01:13:33,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:13:33,951 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;@4ab2887d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:13:33,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 01:13:33,955 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:13:33,955 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-04 01:13:33,955 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:13:33,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:13:33,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 01:13:33,955 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:13:33,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:13:33,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1764368147, now seen corresponding path program 1 times [2023-08-04 01:13:33,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:13:33,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271633011] [2023-08-04 01:13:33,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:13:33,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:13:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:13:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 01:13:34,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:13:34,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271633011] [2023-08-04 01:13:34,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271633011] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:13:34,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:13:34,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:13:34,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123199566] [2023-08-04 01:13:34,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:13:34,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:13:34,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:13:34,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:13:34,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:13:34,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 213 [2023-08-04 01:13:34,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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 01:13:34,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:13:34,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 213 [2023-08-04 01:13:34,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:13:34,483 INFO L124 PetriNetUnfolderBase]: 1143/1846 cut-off events. [2023-08-04 01:13:34,483 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-04 01:13:34,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3778 conditions, 1846 events. 1143/1846 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8694 event pairs, 635 based on Foata normal form. 0/1736 useless extension candidates. Maximal degree in co-relation 3755. Up to 1779 conditions per place. [2023-08-04 01:13:34,496 INFO L140 encePairwiseOnDemand]: 210/213 looper letters, 29 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-04 01:13:34,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 147 flow [2023-08-04 01:13:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:13:34,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:13:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-08-04 01:13:34,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571205007824727 [2023-08-04 01:13:34,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-08-04 01:13:34,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-08-04 01:13:34,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:13:34,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-08-04 01:13:34,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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 01:13:34,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 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 01:13:34,525 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 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 01:13:34,526 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 75 flow. Second operand 3 states and 356 transitions. [2023-08-04 01:13:34,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 147 flow [2023-08-04 01:13:34,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 147 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 01:13:34,531 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 83 flow [2023-08-04 01:13:34,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-04 01:13:34,536 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-08-04 01:13:34,537 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 83 flow [2023-08-04 01:13:34,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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 01:13:34,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:13:34,537 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:13:34,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:13:34,539 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:13:34,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:13:34,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1773342804, now seen corresponding path program 1 times [2023-08-04 01:13:34,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:13:34,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868171594] [2023-08-04 01:13:34,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:13:34,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:13:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:13:34,574 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:13:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:13:34,597 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:13:34,597 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:13:34,598 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 01:13:34,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 01:13:34,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 01:13:34,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 01:13:34,600 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 01:13:34,601 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 01:13:34,602 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:13:34,602 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:13:34,631 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:13:34,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 161 transitions, 358 flow [2023-08-04 01:13:34,771 INFO L124 PetriNetUnfolderBase]: 93/1420 cut-off events. [2023-08-04 01:13:34,772 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 01:13:34,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1518 conditions, 1420 events. 93/1420 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 9922 event pairs, 0 based on Foata normal form. 0/1243 useless extension candidates. Maximal degree in co-relation 1025. Up to 54 conditions per place. [2023-08-04 01:13:34,776 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 161 transitions, 358 flow [2023-08-04 01:13:34,778 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 132 transitions, 300 flow [2023-08-04 01:13:34,778 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:13:34,779 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 132 transitions, 300 flow [2023-08-04 01:13:34,779 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 132 transitions, 300 flow [2023-08-04 01:13:34,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 132 transitions, 300 flow [2023-08-04 01:13:34,824 INFO L124 PetriNetUnfolderBase]: 12/637 cut-off events. [2023-08-04 01:13:34,825 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 01:13:34,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 637 events. 12/637 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3362 event pairs, 0 based on Foata normal form. 0/595 useless extension candidates. Maximal degree in co-relation 503. Up to 27 conditions per place. [2023-08-04 01:13:34,834 INFO L119 LiptonReduction]: Number of co-enabled transitions 4668 [2023-08-04 01:13:37,284 INFO L134 LiptonReduction]: Checked pairs total: 18393 [2023-08-04 01:13:37,285 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-04 01:13:37,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:13:37,287 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;@4ab2887d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:13:37,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 01:13:37,292 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:13:37,292 INFO L124 PetriNetUnfolderBase]: 0/65 cut-off events. [2023-08-04 01:13:37,292 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 01:13:37,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:13:37,292 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 01:13:37,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:13:37,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:13:37,293 INFO L85 PathProgramCache]: Analyzing trace with hash 946064985, now seen corresponding path program 1 times [2023-08-04 01:13:37,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:13:37,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202730494] [2023-08-04 01:13:37,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:13:37,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:13:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:13:37,323 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 01:13:37,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:13:37,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202730494] [2023-08-04 01:13:37,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202730494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:13:37,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:13:37,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:13:37,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665175433] [2023-08-04 01:13:37,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:13:37,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:13:37,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:13:37,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:13:37,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:13:37,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 248 [2023-08-04 01:13:37,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 52 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 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 01:13:37,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:13:37,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 248 [2023-08-04 01:13:37,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:14:44,651 INFO L124 PetriNetUnfolderBase]: 614966/767170 cut-off events. [2023-08-04 01:14:44,652 INFO L125 PetriNetUnfolderBase]: For 29670/29670 co-relation queries the response was YES. [2023-08-04 01:14:46,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1564343 conditions, 767170 events. 614966/767170 cut-off events. For 29670/29670 co-relation queries the response was YES. Maximal size of possible extension queue 17488. Compared 4793347 event pairs, 495210 based on Foata normal form. 0/726805 useless extension candidates. Maximal degree in co-relation 277322. Up to 764662 conditions per place. [2023-08-04 01:14:48,504 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 48 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-04 01:14:48,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 252 flow [2023-08-04 01:14:48,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:14:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:14:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-08-04 01:14:48,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2023-08-04 01:14:48,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-08-04 01:14:48,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-08-04 01:14:48,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:14:48,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-08-04 01:14:48,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 01:14:48,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:14:48,509 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:14:48,509 INFO L175 Difference]: Start difference. First operand has 65 places, 52 transitions, 140 flow. Second operand 3 states and 420 transitions. [2023-08-04 01:14:48,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 252 flow [2023-08-04 01:14:48,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 58 transitions, 246 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 01:14:48,543 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 146 flow [2023-08-04 01:14:48,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-08-04 01:14:48,544 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-04 01:14:48,544 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 146 flow [2023-08-04 01:14:48,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 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 01:14:48,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:14:48,544 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:14:48,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 01:14:48,544 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:14:48,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:14:48,545 INFO L85 PathProgramCache]: Analyzing trace with hash 17185739, now seen corresponding path program 1 times [2023-08-04 01:14:48,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:14:48,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317539139] [2023-08-04 01:14:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:14:48,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:14:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:14:48,590 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 01:14:48,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:14:48,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317539139] [2023-08-04 01:14:48,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317539139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:14:48,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722720190] [2023-08-04 01:14:48,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:14:48,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:14:48,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:14:48,603 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 01:14:48,636 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 01:14:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:14:48,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:14:48,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:14:48,726 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 01:14:48,727 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:14:48,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722720190] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:14:48,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:14:48,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:14:48,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247835768] [2023-08-04 01:14:48,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:14:48,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:14:48,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:14:48,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:14:48,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:14:48,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 248 [2023-08-04 01:14:48,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 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 01:14:48,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:14:48,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 248 [2023-08-04 01:14:48,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:15:55,446 INFO L124 PetriNetUnfolderBase]: 614926/767465 cut-off events. [2023-08-04 01:15:55,446 INFO L125 PetriNetUnfolderBase]: For 28355/28355 co-relation queries the response was YES. [2023-08-04 01:15:57,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1563751 conditions, 767465 events. 614926/767465 cut-off events. For 28355/28355 co-relation queries the response was YES. Maximal size of possible extension queue 17527. Compared 4805500 event pairs, 395430 based on Foata normal form. 25/727110 useless extension candidates. Maximal degree in co-relation 324715. Up to 764533 conditions per place. [2023-08-04 01:15:59,588 INFO L140 encePairwiseOnDemand]: 244/248 looper letters, 55 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-08-04 01:15:59,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 66 transitions, 290 flow [2023-08-04 01:15:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:15:59,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:15:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 670 transitions. [2023-08-04 01:15:59,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403225806451613 [2023-08-04 01:15:59,591 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 670 transitions. [2023-08-04 01:15:59,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 670 transitions. [2023-08-04 01:15:59,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:15:59,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 670 transitions. [2023-08-04 01:15:59,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 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 01:15:59,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:15:59,596 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:15:59,596 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 146 flow. Second operand 5 states and 670 transitions. [2023-08-04 01:15:59,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 66 transitions, 290 flow [2023-08-04 01:15:59,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 66 transitions, 287 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:15:59,694 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 160 flow [2023-08-04 01:15:59,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2023-08-04 01:15:59,695 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2023-08-04 01:15:59,695 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 160 flow [2023-08-04 01:15:59,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 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 01:15:59,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:15:59,696 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:15:59,701 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 01:15:59,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:15:59,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:15:59,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:15:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2134122888, now seen corresponding path program 1 times [2023-08-04 01:15:59,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:15:59,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688781402] [2023-08-04 01:15:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:15:59,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:15:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:15:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:15:59,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:15:59,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688781402] [2023-08-04 01:15:59,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688781402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:15:59,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043588669] [2023-08-04 01:15:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:15:59,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:15:59,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:15:59,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:15:59,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 01:16:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:00,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:16:00,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:16:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:16:00,057 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:16:00,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043588669] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:16:00,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:16:00,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:16:00,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738545863] [2023-08-04 01:16:00,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:16:00,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:16:00,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:16:00,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:16:00,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:16:00,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 248 [2023-08-04 01:16:00,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 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 01:16:00,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:16:00,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 248 [2023-08-04 01:16:00,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:17:06,533 INFO L124 PetriNetUnfolderBase]: 605994/760249 cut-off events. [2023-08-04 01:17:06,533 INFO L125 PetriNetUnfolderBase]: For 27185/27185 co-relation queries the response was YES. [2023-08-04 01:17:08,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1546076 conditions, 760249 events. 605994/760249 cut-off events. For 27185/27185 co-relation queries the response was YES. Maximal size of possible extension queue 17853. Compared 4817906 event pairs, 483992 based on Foata normal form. 0/720439 useless extension candidates. Maximal degree in co-relation 499081. Up to 751690 conditions per place. [2023-08-04 01:17:10,860 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 58 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-08-04 01:17:10,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 312 flow [2023-08-04 01:17:10,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:17:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:17:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2023-08-04 01:17:10,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5766129032258065 [2023-08-04 01:17:10,862 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2023-08-04 01:17:10,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2023-08-04 01:17:10,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:17:10,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2023-08-04 01:17:10,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 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 01:17:10,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:17:10,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:17:10,864 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 160 flow. Second operand 3 states and 429 transitions. [2023-08-04 01:17:10,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 312 flow [2023-08-04 01:17:10,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 305 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 01:17:10,866 INFO L231 Difference]: Finished difference. Result has 72 places, 54 transitions, 168 flow [2023-08-04 01:17:10,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=72, PETRI_TRANSITIONS=54} [2023-08-04 01:17:10,867 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 7 predicate places. [2023-08-04 01:17:10,867 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 54 transitions, 168 flow [2023-08-04 01:17:10,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 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 01:17:10,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:17:10,867 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:17:10,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 01:17:11,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:17:11,072 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:17:11,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:17:11,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1210055721, now seen corresponding path program 1 times [2023-08-04 01:17:11,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:17:11,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280089644] [2023-08-04 01:17:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:17:11,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:17:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:17:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:17:11,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:17:11,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280089644] [2023-08-04 01:17:11,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280089644] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:17:11,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263589413] [2023-08-04 01:17:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:17:11,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:17:11,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:17:11,111 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:17:11,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 01:17:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:17:11,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:17:11,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:17:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:17:11,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:17:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:17:11,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263589413] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:17:11,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:17:11,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:17:11,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930876160] [2023-08-04 01:17:11,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:17:11,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:17:11,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:17:11,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:17:11,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:17:11,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 248 [2023-08-04 01:17:11,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 54 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 124.6) internal successors, (623), 5 states have internal predecessors, (623), 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 01:17:11,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:17:11,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 248 [2023-08-04 01:17:11,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:18:08,513 INFO L124 PetriNetUnfolderBase]: 521253/651157 cut-off events. [2023-08-04 01:18:08,513 INFO L125 PetriNetUnfolderBase]: For 24955/24955 co-relation queries the response was YES. [2023-08-04 01:18:10,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1325248 conditions, 651157 events. 521253/651157 cut-off events. For 24955/24955 co-relation queries the response was YES. Maximal size of possible extension queue 16221. Compared 4031858 event pairs, 326225 based on Foata normal form. 5/618962 useless extension candidates. Maximal degree in co-relation 274781. Up to 643101 conditions per place. [2023-08-04 01:18:12,464 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 56 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2023-08-04 01:18:12,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 66 transitions, 305 flow [2023-08-04 01:18:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:18:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:18:12,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 547 transitions. [2023-08-04 01:18:12,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5514112903225806 [2023-08-04 01:18:12,467 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 547 transitions. [2023-08-04 01:18:12,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 547 transitions. [2023-08-04 01:18:12,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:18:12,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 547 transitions. [2023-08-04 01:18:12,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 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 01:18:12,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:18:12,470 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:18:12,470 INFO L175 Difference]: Start difference. First operand has 72 places, 54 transitions, 168 flow. Second operand 4 states and 547 transitions. [2023-08-04 01:18:12,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 66 transitions, 305 flow [2023-08-04 01:18:12,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 66 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:18:12,472 INFO L231 Difference]: Finished difference. Result has 74 places, 53 transitions, 163 flow [2023-08-04 01:18:12,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=74, PETRI_TRANSITIONS=53} [2023-08-04 01:18:12,473 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 9 predicate places. [2023-08-04 01:18:12,473 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 53 transitions, 163 flow [2023-08-04 01:18:12,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.6) internal successors, (623), 5 states have internal predecessors, (623), 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 01:18:12,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:18:12,473 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:18:12,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 01:18:12,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:18:12,676 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:18:12,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:18:12,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1078261163, now seen corresponding path program 1 times [2023-08-04 01:18:12,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:18:12,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032280792] [2023-08-04 01:18:12,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:18:12,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:18:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:18:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:18:12,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:18:12,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032280792] [2023-08-04 01:18:12,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032280792] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:18:12,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106491827] [2023-08-04 01:18:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:18:12,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:18:12,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:18:12,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:18:12,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 01:18:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:18:12,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:18:12,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:18:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:18:12,843 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:18:12,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106491827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:18:12,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:18:12,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:18:12,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868253531] [2023-08-04 01:18:12,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:18:12,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:18:12,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:18:12,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:18:12,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:18:12,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 248 [2023-08-04 01:18:12,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 53 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 124.6) internal successors, (623), 5 states have internal predecessors, (623), 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 01:18:12,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:18:12,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 248 [2023-08-04 01:18:12,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:19:12,074 INFO L124 PetriNetUnfolderBase]: 518313/651073 cut-off events. [2023-08-04 01:19:12,075 INFO L125 PetriNetUnfolderBase]: For 21468/21468 co-relation queries the response was YES. [2023-08-04 01:19:13,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1322605 conditions, 651073 events. 518313/651073 cut-off events. For 21468/21468 co-relation queries the response was YES. Maximal size of possible extension queue 16427. Compared 4119289 event pairs, 138668 based on Foata normal form. 900/618348 useless extension candidates. Maximal degree in co-relation 499955. Up to 634555 conditions per place. [2023-08-04 01:19:15,993 INFO L140 encePairwiseOnDemand]: 244/248 looper letters, 83 selfloop transitions, 4 changer transitions 0/93 dead transitions. [2023-08-04 01:19:15,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 417 flow [2023-08-04 01:19:15,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:19:15,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:19:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 697 transitions. [2023-08-04 01:19:15,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5620967741935484 [2023-08-04 01:19:15,996 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 697 transitions. [2023-08-04 01:19:15,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 697 transitions. [2023-08-04 01:19:15,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:19:15,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 697 transitions. [2023-08-04 01:19:15,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.4) internal successors, (697), 5 states have internal predecessors, (697), 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 01:19:16,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:19:16,001 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:19:16,001 INFO L175 Difference]: Start difference. First operand has 74 places, 53 transitions, 163 flow. Second operand 5 states and 697 transitions. [2023-08-04 01:19:16,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 417 flow [2023-08-04 01:19:16,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 93 transitions, 410 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:19:16,009 INFO L231 Difference]: Finished difference. Result has 75 places, 53 transitions, 173 flow [2023-08-04 01:19:16,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=75, PETRI_TRANSITIONS=53} [2023-08-04 01:19:16,010 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2023-08-04 01:19:16,010 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 53 transitions, 173 flow [2023-08-04 01:19:16,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.6) internal successors, (623), 5 states have internal predecessors, (623), 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 01:19:16,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:19:16,011 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:19:16,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 01:19:16,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:19:16,225 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:19:16,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:19:16,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1882370734, now seen corresponding path program 1 times [2023-08-04 01:19:16,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:19:16,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49880599] [2023-08-04 01:19:16,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:19:16,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:19:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:19:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 01:19:16,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:19:16,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49880599] [2023-08-04 01:19:16,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49880599] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:19:16,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074098233] [2023-08-04 01:19:16,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:19:16,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:19:16,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:19:16,301 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:19:16,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 01:19:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:19:16,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:19:16,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:19:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 01:19:16,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:19:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 01:19:16,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074098233] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:19:16,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:19:16,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:19:16,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688092515] [2023-08-04 01:19:16,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:19:16,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:19:16,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:19:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:19:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:19:16,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 248 [2023-08-04 01:19:16,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 53 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 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 01:19:16,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:19:16,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 248 [2023-08-04 01:19:16,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:20:10,008 INFO L124 PetriNetUnfolderBase]: 457268/571428 cut-off events. [2023-08-04 01:20:10,009 INFO L125 PetriNetUnfolderBase]: For 24260/24260 co-relation queries the response was YES. [2023-08-04 01:20:11,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163635 conditions, 571428 events. 457268/571428 cut-off events. For 24260/24260 co-relation queries the response was YES. Maximal size of possible extension queue 15570. Compared 3514712 event pairs, 283028 based on Foata normal form. 150/542753 useless extension candidates. Maximal degree in co-relation 440437. Up to 556696 conditions per place. [2023-08-04 01:20:13,306 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 75 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-08-04 01:20:13,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 84 transitions, 387 flow [2023-08-04 01:20:13,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:20:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:20:13,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 566 transitions. [2023-08-04 01:20:13,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705645161290323 [2023-08-04 01:20:13,307 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 566 transitions. [2023-08-04 01:20:13,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 566 transitions. [2023-08-04 01:20:13,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:20:13,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 566 transitions. [2023-08-04 01:20:13,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:13,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:13,310 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:13,310 INFO L175 Difference]: Start difference. First operand has 75 places, 53 transitions, 173 flow. Second operand 4 states and 566 transitions. [2023-08-04 01:20:13,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 84 transitions, 387 flow [2023-08-04 01:20:13,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 84 transitions, 382 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 01:20:13,316 INFO L231 Difference]: Finished difference. Result has 76 places, 52 transitions, 166 flow [2023-08-04 01:20:13,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=76, PETRI_TRANSITIONS=52} [2023-08-04 01:20:13,317 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2023-08-04 01:20:13,317 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 52 transitions, 166 flow [2023-08-04 01:20:13,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 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 01:20:13,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:20:13,317 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:20:13,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 01:20:13,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:20:13,522 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:20:13,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:20:13,523 INFO L85 PathProgramCache]: Analyzing trace with hash 45731751, now seen corresponding path program 1 times [2023-08-04 01:20:13,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:20:13,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617890042] [2023-08-04 01:20:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:13,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:20:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:20:13,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:20:13,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617890042] [2023-08-04 01:20:13,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617890042] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:20:13,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875020947] [2023-08-04 01:20:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:13,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:20:13,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:20:13,657 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:20:13,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 01:20:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:13,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:20:13,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:20:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:20:13,764 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:20:13,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875020947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:20:13,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:20:13,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:20:13,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889396703] [2023-08-04 01:20:13,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:20:13,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 01:20:13,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:20:13,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 01:20:13,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:20:13,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 248 [2023-08-04 01:20:13,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 52 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 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 01:20:13,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:20:13,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 248 [2023-08-04 01:20:13,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:20:40,618 INFO L124 PetriNetUnfolderBase]: 237608/304913 cut-off events. [2023-08-04 01:20:40,618 INFO L125 PetriNetUnfolderBase]: For 15590/15590 co-relation queries the response was YES. [2023-08-04 01:20:41,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629010 conditions, 304913 events. 237608/304913 cut-off events. For 15590/15590 co-relation queries the response was YES. Maximal size of possible extension queue 7786. Compared 1862683 event pairs, 6248 based on Foata normal form. 44100/332783 useless extension candidates. Maximal degree in co-relation 237171. Up to 258240 conditions per place. [2023-08-04 01:20:41,486 INFO L140 encePairwiseOnDemand]: 246/248 looper letters, 0 selfloop transitions, 0 changer transitions 93/93 dead transitions. [2023-08-04 01:20:41,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 93 transitions, 422 flow [2023-08-04 01:20:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:20:41,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:20:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 579 transitions. [2023-08-04 01:20:41,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5836693548387096 [2023-08-04 01:20:41,488 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 579 transitions. [2023-08-04 01:20:41,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 579 transitions. [2023-08-04 01:20:41,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:20:41,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 579 transitions. [2023-08-04 01:20:41,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 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 01:20:41,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:41,490 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:41,490 INFO L175 Difference]: Start difference. First operand has 76 places, 52 transitions, 166 flow. Second operand 4 states and 579 transitions. [2023-08-04 01:20:41,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 93 transitions, 422 flow [2023-08-04 01:20:49,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 93 transitions, 415 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:20:49,093 INFO L231 Difference]: Finished difference. Result has 74 places, 0 transitions, 0 flow [2023-08-04 01:20:49,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=74, PETRI_TRANSITIONS=0} [2023-08-04 01:20:49,094 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 9 predicate places. [2023-08-04 01:20:49,094 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 0 transitions, 0 flow [2023-08-04 01:20:49,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 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 01:20:49,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 01:20:49,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 01:20:49,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 01:20:49,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 01:20:49,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:20:49,298 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:20:49,299 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 01:20:49,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 161 transitions, 358 flow [2023-08-04 01:20:49,382 INFO L124 PetriNetUnfolderBase]: 93/1420 cut-off events. [2023-08-04 01:20:49,383 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 01:20:49,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1518 conditions, 1420 events. 93/1420 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 9922 event pairs, 0 based on Foata normal form. 0/1243 useless extension candidates. Maximal degree in co-relation 1025. Up to 54 conditions per place. [2023-08-04 01:20:49,385 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 161 transitions, 358 flow [2023-08-04 01:20:49,388 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 159 transitions, 346 flow [2023-08-04 01:20:49,388 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:20:49,388 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 159 transitions, 346 flow [2023-08-04 01:20:49,388 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 159 transitions, 346 flow [2023-08-04 01:20:49,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 159 transitions, 346 flow [2023-08-04 01:20:49,468 INFO L124 PetriNetUnfolderBase]: 93/1416 cut-off events. [2023-08-04 01:20:49,469 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-04 01:20:49,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 1416 events. 93/1416 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 9880 event pairs, 0 based on Foata normal form. 0/1239 useless extension candidates. Maximal degree in co-relation 1013. Up to 54 conditions per place. [2023-08-04 01:20:49,485 INFO L119 LiptonReduction]: Number of co-enabled transitions 7472 [2023-08-04 01:20:52,785 INFO L134 LiptonReduction]: Checked pairs total: 27498 [2023-08-04 01:20:52,786 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-04 01:20:52,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 01:20:52,787 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;@4ab2887d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:20:52,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 01:20:52,788 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:20:52,788 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-04 01:20:52,788 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:20:52,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:20:52,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 01:20:52,789 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 01:20:52,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:20:52,789 INFO L85 PathProgramCache]: Analyzing trace with hash 586502334, now seen corresponding path program 1 times [2023-08-04 01:20:52,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:20:52,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960178781] [2023-08-04 01:20:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:52,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:20:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:20:52,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:20:52,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960178781] [2023-08-04 01:20:52,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960178781] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:20:52,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:20:52,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:20:52,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192314263] [2023-08-04 01:20:52,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:20:52,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:20:52,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:20:52,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:20:52,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:20:52,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 281 [2023-08-04 01:20:52,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 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 01:20:52,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:20:52,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 281 [2023-08-04 01:20:52,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand